Translate Java enums to Dart constants.

pkg/analyzer/lib/src/generated/error.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.error;
 
 import 'java_core.dart';
 import 'source.dart';
 import 'scanner.dart' show Token;
 import 'ast.dart' show AstNode;
 import 'element.dart' show Element;
 
 /**
  * Instances of the enumeration `ErrorSeverity` represent the severity of an [ErrorCode]
  * .
  */
 class ErrorSeverity extends Enum<ErrorSeverity> {
   /**
    * The severity representing a non-error. This is never used for any error code, but is useful for
    * clients.
    */
-  static final ErrorSeverity NONE = new ErrorSeverity('NONE', 0, " ", "none");
+  static const ErrorSeverity NONE = const ErrorSeverity('NONE', 0, " ", "none");
 
   /**
    * The severity representing an informational level analysis issue.
    */
-  static final ErrorSeverity INFO = new ErrorSeverity('INFO', 1, "I", "info");
+  static const ErrorSeverity INFO = const ErrorSeverity('INFO', 1, "I", "info");
 
   /**
    * The severity representing a warning. Warnings can become errors if the `-Werror` command
    * line flag is specified.
    */
-  static final ErrorSeverity WARNING = new ErrorSeverity('WARNING', 2, "W", "warning");
+  static const ErrorSeverity WARNING = const ErrorSeverity('WARNING', 2, "W", "warning");
 
   /**
    * The severity representing an error.
    */
-  static final ErrorSeverity ERROR = new ErrorSeverity('ERROR', 3, "E", "error");
+  static const ErrorSeverity ERROR = const ErrorSeverity('ERROR', 3, "E", "error");
 
-  static final List<ErrorSeverity> values = [NONE, INFO, WARNING, ERROR];
+  static const List<ErrorSeverity> values = const [NONE, INFO, WARNING, ERROR];
 
   /**
    * The name of the severity used when producing machine output.
    */
-  String machineCode;
+  final String machineCode;
 
   /**
    * The name of the severity used when producing readable output.
    */
-  String displayName;
+  final String displayName;
 
   /**
    * Initialize a newly created severity with the given names.
    *
    * @param machineCode the name of the severity used when producing machine output
    * @param displayName the name of the severity used when producing readable output
    */
-  ErrorSeverity(String name, int ordinal, String machineCode, String displayName) : super(name, ordinal) {
-    this.machineCode = machineCode;
-    this.displayName = displayName;
-  }
+  const ErrorSeverity(String name, int ordinal, this.machineCode, this.displayName) : super(name, ordinal);
 
   /**
    * Return the severity constant that represents the greatest severity.
    *
    * @param severity the severity being compared against
    * @return the most sever of this or the given severity
    */
   ErrorSeverity max(ErrorSeverity severity) => this.ordinal >= severity.ordinal ? this : severity;
 }
 
@@ skipping 62 matching lines @@
   @override
   void onError(AnalysisError error) {
     _errorReported = true;
   }
 }
 
 /**
  * The enumeration `AngularCode` defines Angular specific problems.
  */
 class AngularCode extends Enum<AngularCode> implements ErrorCode {
-  static final AngularCode CANNOT_PARSE_SELECTOR = new AngularCode.con1('CANNOT_PARSE_SELECTOR', 0, "The selector '%s' cannot be parsed");
+  static const AngularCode CANNOT_PARSE_SELECTOR = const AngularCode.con1('CANNOT_PARSE_SELECTOR', 0, "The selector '%s' cannot be parsed");
 
-  static final AngularCode INVALID_PROPERTY_KIND = new AngularCode.con2('INVALID_PROPERTY_KIND', 1, "Unknown property binding kind '%s', use one of the '@', '=>', '=>!' or '<=>'", ErrorSeverity.ERROR);
+  static const AngularCode INVALID_PROPERTY_KIND = const AngularCode.con1('INVALID_PROPERTY_KIND', 1, "Unknown property binding kind '%s', use one of the '@', '=>', '=>!' or '<=>'");
 
-  static final AngularCode INVALID_PROPERTY_FIELD = new AngularCode.con1('INVALID_PROPERTY_FIELD', 2, "Unknown property field '%s'");
+  static const AngularCode INVALID_PROPERTY_FIELD = const AngularCode.con1('INVALID_PROPERTY_FIELD', 2, "Unknown property field '%s'");
 
-  static final AngularCode INVALID_PROPERTY_MAP = new AngularCode.con1('INVALID_PROPERTY_MAP', 3, "Argument 'map' must be a constant map literal");
+  static const AngularCode INVALID_PROPERTY_MAP = const AngularCode.con1('INVALID_PROPERTY_MAP', 3, "Argument 'map' must be a constant map literal");
 
-  static final AngularCode INVALID_PROPERTY_NAME = new AngularCode.con1('INVALID_PROPERTY_NAME', 4, "Property name must be a string literal");
+  static const AngularCode INVALID_PROPERTY_NAME = const AngularCode.con1('INVALID_PROPERTY_NAME', 4, "Property name must be a string literal");
 
-  static final AngularCode INVALID_PROPERTY_SPEC = new AngularCode.con1('INVALID_PROPERTY_SPEC', 5, "Property binding specification must be a string literal");
+  static const AngularCode INVALID_PROPERTY_SPEC = const AngularCode.con1('INVALID_PROPERTY_SPEC', 5, "Property binding specification must be a string literal");
 
-  static final AngularCode INVALID_REPEAT_SYNTAX = new AngularCode.con1('INVALID_REPEAT_SYNTAX', 6, "Expected statement in form '_item_ in _collection_ [tracked by _id_]'");
+  static const AngularCode INVALID_REPEAT_SYNTAX = const AngularCode.con1('INVALID_REPEAT_SYNTAX', 6, "Expected statement in form '_item_ in _collection_ [tracked by _id_]'");
 
-  static final AngularCode INVALID_REPEAT_ITEM_SYNTAX = new AngularCode.con1('INVALID_REPEAT_ITEM_SYNTAX', 7, "Item must by identifier or in '(_key_, _value_)' pair.");
+  static const AngularCode INVALID_REPEAT_ITEM_SYNTAX = const AngularCode.con1('INVALID_REPEAT_ITEM_SYNTAX', 7, "Item must by identifier or in '(_key_, _value_)' pair.");
 
-  static final AngularCode INVALID_URI = new AngularCode.con2('INVALID_URI', 8, "Invalid URI syntax: '%s'", ErrorSeverity.ERROR);
+  static const AngularCode INVALID_URI = const AngularCode.con1('INVALID_URI', 8, "Invalid URI syntax: '%s'");
 
-  static final AngularCode MISSING_FILTER_COLON = new AngularCode.con1('MISSING_FILTER_COLON', 9, "Missing ':' before filter argument");
+  static const AngularCode MISSING_FILTER_COLON = const AngularCode.con1('MISSING_FILTER_COLON', 9, "Missing ':' before filter argument");
 
-  static final AngularCode MISSING_NAME = new AngularCode.con1('MISSING_NAME', 10, "Argument 'name' must be provided");
+  static const AngularCode MISSING_NAME = const AngularCode.con1('MISSING_NAME', 10, "Argument 'name' must be provided");
 
-  static final AngularCode MISSING_PUBLISH_AS = new AngularCode.con1('MISSING_PUBLISH_AS', 11, "Argument 'publishAs' must be provided");
+  static const AngularCode MISSING_PUBLISH_AS = const AngularCode.con1('MISSING_PUBLISH_AS', 11, "Argument 'publishAs' must be provided");
 
-  static final AngularCode MISSING_SELECTOR = new AngularCode.con1('MISSING_SELECTOR', 12, "Argument 'selector' must be provided");
+  static const AngularCode MISSING_SELECTOR = const AngularCode.con1('MISSING_SELECTOR', 12, "Argument 'selector' must be provided");
 
-  static final AngularCode URI_DOES_NOT_EXIST = new AngularCode.con1('URI_DOES_NOT_EXIST', 13, "Target of URI does not exist: '%s'");
+  static const AngularCode URI_DOES_NOT_EXIST = const AngularCode.con1('URI_DOES_NOT_EXIST', 13, "Target of URI does not exist: '%s'");
 
-  static final List<AngularCode> values = [
+  static const List<AngularCode> values = const [
       CANNOT_PARSE_SELECTOR,
       INVALID_PROPERTY_KIND,
       INVALID_PROPERTY_FIELD,
       INVALID_PROPERTY_MAP,
       INVALID_PROPERTY_NAME,
       INVALID_PROPERTY_SPEC,
       INVALID_REPEAT_SYNTAX,
       INVALID_REPEAT_ITEM_SYNTAX,
       INVALID_URI,
       MISSING_FILTER_COLON,
       MISSING_NAME,
       MISSING_PUBLISH_AS,
       MISSING_SELECTOR,
       URI_DOES_NOT_EXIST];
 
   /**
    * The template used to create the message to be displayed for this error.
    */
-  String _message;
+  final String message;
 
   /**
    * The severity of the problem.
    */
-  ErrorSeverity _severity;
+  final ErrorSeverity errorSeverity;
 
   /**
    * Initialize a newly created error code to have the given message.
    *
    * @param message the message template used to create the message to be displayed for the error
    */
-  AngularCode.con1(String name, int ordinal, String message) : this.con2(name, ordinal, message, ErrorSeverity.WARNING);
+  const AngularCode.con1(String name, int ordinal, String message) : this.con2(name, ordinal, message, ErrorSeverity.INFO);
 
   /**
    * Initialize a newly created error code to have the given message.
    *
    * @param message the message template used to create the message to be displayed for the error
-   * @param severity the severity of the problem
+   * @param errorSeverity the severity of the problem
    */
-  AngularCode.con2(String name, int ordinal, String message, ErrorSeverity severity) : super(name, ordinal) {
-    this._message = message;
-    this._severity = ErrorSeverity.INFO;
-  }
+  const AngularCode.con2(String name, int ordinal, this.message, this.errorSeverity) : super(name, ordinal);
 
   @override
   String get correction => null;
 
   @override
-  ErrorSeverity get errorSeverity => _severity;
-
-  @override
-  String get message => _message;
-
-  @override
   ErrorType get type => ErrorType.ANGULAR;
 }
 
 /**
  * Instances of the class `ErrorReporter` wrap an error listener with utility methods used to
  * create the errors being reported.
  */
 class ErrorReporter {
   /**
    * The error listener to which errors will be reported.
    */
-  AnalysisErrorListener _errorListener;
+  final AnalysisErrorListener _errorListener;
 
   /**
    * The default source to be used when reporting errors.
    */
-  Source _defaultSource;
+  final Source _defaultSource;
 
   /**
    * The source to be used when reporting errors.
    */
   Source _source;
 
   /**
    * Initialize a newly created error reporter that will report errors to the given listener.
    *
    * @param errorListener the error listener to which errors will be reported
    * @param defaultSource the default source to be used when reporting errors
    */
-  ErrorReporter(AnalysisErrorListener errorListener, Source defaultSource) {
-    if (errorListener == null) {
+  ErrorReporter(this._errorListener, this._defaultSource) {
+    if (_errorListener == null) {
       throw new IllegalArgumentException("An error listener must be provided");
-    } else if (defaultSource == null) {
+    } else if (_defaultSource == null) {
       throw new IllegalArgumentException("A default source must be provided");
     }
-    this._errorListener = errorListener;
-    this._defaultSource = defaultSource;
-    this._source = defaultSource;
+    this._source = _defaultSource;
   }
 
   /**
    * Creates an error with properties with the given error code and arguments.
    *
    * @param errorCode the error code of the error to be reported
    * @param node the node specifying the location of the error
    * @param arguments the arguments to the error, used to compose the error message
    */
   AnalysisErrorWithProperties newErrorWithProperties(ErrorCode errorCode, AstNode node, List<Object> arguments) => new AnalysisErrorWithProperties.con2(_source, node.offset, node.length, errorCode, arguments);
@@ skipping 95 matching lines @@
     if (errorSeverity1 == errorSeverity2) {
       return errorType1.compareTo(errorType2);
     } else {
       return errorSeverity2.compareTo(errorSeverity1);
     }
   };
 
   /**
    * The error code associated with the error.
    */
-  ErrorCode errorCode;
+  final ErrorCode errorCode;
 
   /**
    * The localized error message.
    */
   String _message;
 
   /**
    * The correction to be displayed for this error, or `null` if there is no correction
    * information for this error.
    */
@@ skipping 22 matching lines @@
   bool isStaticOnly = false;
 
   /**
    * Initialize a newly created analysis error for the specified source. The error has no location
    * information.
    *
    * @param source the source for which the exception occurred
    * @param errorCode the error code to be associated with this error
    * @param arguments the arguments used to build the error message
    */
-  AnalysisError.con1(Source source, ErrorCode errorCode, List<Object> arguments) {
-    this.source = source;
-    this.errorCode = errorCode;
+  AnalysisError.con1(this.source, this.errorCode, List<Object> arguments) {
     this._message = JavaString.format(errorCode.message, arguments);
   }
 
   /**
    * Initialize a newly created analysis error for the specified source at the given location.
    *
    * @param source the source for which the exception occurred
    * @param offset the offset of the location of the error
    * @param length the length of the location of the error
    * @param errorCode the error code to be associated with this error
    * @param arguments the arguments used to build the error message
    */
-  AnalysisError.con2(Source source, int offset, int length, ErrorCode errorCode, List<Object> arguments) {
-    this.source = source;
+  AnalysisError.con2(this.source, int offset, int length, this.errorCode, List<Object> arguments) {
     this._offset = offset;
     this._length = length;
-    this.errorCode = errorCode;
     this._message = JavaString.format(errorCode.message, arguments);
     String correctionTemplate = errorCode.correction;
     if (correctionTemplate != null) {
       this._correction = JavaString.format(correctionTemplate, arguments);
     }
   }
 
   @override
   bool operator ==(Object obj) {
     if (identical(obj, this)) {
@@ skipping 91 matching lines @@
 
 /**
  * The enumeration `ErrorProperty` defines the properties that can be associated with an
  * [AnalysisError].
  */
 class ErrorProperty extends Enum<ErrorProperty> {
   /**
    * A property whose value is an array of [ExecutableElement] that should
    * be but are not implemented by a concrete class.
    */
-  static final ErrorProperty UNIMPLEMENTED_METHODS = new ErrorProperty('UNIMPLEMENTED_METHODS', 0);
+  static const ErrorProperty UNIMPLEMENTED_METHODS = const ErrorProperty('UNIMPLEMENTED_METHODS', 0);
 
-  static final List<ErrorProperty> values = [UNIMPLEMENTED_METHODS];
+  static const List<ErrorProperty> values = const [UNIMPLEMENTED_METHODS];
 
-  ErrorProperty(String name, int ordinal) : super(name, ordinal);
+  const ErrorProperty(String name, int ordinal) : super(name, ordinal);
 }
 
 /**
  * The enumeration `TodoCode` defines the single TODO `ErrorCode`.
  */
 class TodoCode extends Enum<TodoCode> implements ErrorCode {
   /**
    * The single enum of TodoCode.
    */
-  static final TodoCode TODO = new TodoCode('TODO', 0);
+  static const TodoCode TODO = const TodoCode('TODO', 0);
 
-  static final List<TodoCode> values = [TODO];
+  static const List<TodoCode> values = const [TODO];
 
   /**
    * This matches the two common Dart task styles
    *
    * * TODO:
    * * TODO(username):
    *
    * As well as
    * * TODO
    *
    * But not
    * * todo
    * * TODOS
    */
   static RegExp TODO_REGEX = new RegExp("([\\s/\\*])((TODO[^\\w\\d][^\\r\\n]*)|(TODO:?\$))");
 
-  TodoCode(String name, int ordinal) : super(name, ordinal);
+  const TodoCode(String name, int ordinal) : super(name, ordinal);
 
   @override
   String get correction => null;
 
   @override
   ErrorSeverity get errorSeverity => ErrorSeverity.INFO;
 
   @override
   String get message => "%s";
 
   @override
   ErrorType get type => ErrorType.TODO;
 }
 
 /**
  * The enumeration `HintCode` defines the hints and coding recommendations for best practices
  * which are not mentioned in the Dart Language Specification.
  */
 class HintCode extends Enum<HintCode> implements ErrorCode {
   /**
    * This hint is generated anywhere where the
    * [StaticWarningCode#ARGUMENT_TYPE_NOT_ASSIGNABLE] would have been generated, if we used
    * propagated information for the warnings.
    *
    * @param actualType the name of the actual argument type
    * @param expectedType the name of the expected type
    * @see StaticWarningCode#ARGUMENT_TYPE_NOT_ASSIGNABLE
    */
-  static final HintCode ARGUMENT_TYPE_NOT_ASSIGNABLE = new HintCode.con1('ARGUMENT_TYPE_NOT_ASSIGNABLE', 0, StaticWarningCode.ARGUMENT_TYPE_NOT_ASSIGNABLE.message);
+  static const HintCode ARGUMENT_TYPE_NOT_ASSIGNABLE = const HintCode.con1('ARGUMENT_TYPE_NOT_ASSIGNABLE', 0, "The argument type '%s' cannot be assigned to the parameter type '%s'");
 
   /**
    * Dead code is code that is never reached, this can happen for instance if a statement follows a
    * return statement.
    */
-  static final HintCode DEAD_CODE = new HintCode.con1('DEAD_CODE', 1, "Dead code");
+  static const HintCode DEAD_CODE = const HintCode.con1('DEAD_CODE', 1, "Dead code");
 
   /**
    * Dead code is code that is never reached. This case covers cases where the user has catch
    * clauses after `catch (e)` or `on Object catch (e)`.
    */
-  static final HintCode DEAD_CODE_CATCH_FOLLOWING_CATCH = new HintCode.con1('DEAD_CODE_CATCH_FOLLOWING_CATCH', 2, "Dead code, catch clauses after a 'catch (e)' or an 'on Object catch (e)' are never reached");
+  static const HintCode DEAD_CODE_CATCH_FOLLOWING_CATCH = const HintCode.con1('DEAD_CODE_CATCH_FOLLOWING_CATCH', 2, "Dead code, catch clauses after a 'catch (e)' or an 'on Object catch (e)' are never reached");
 
   /**
    * Dead code is code that is never reached. This case covers cases where the user has an on-catch
    * clause such as `on A catch (e)`, where a supertype of `A` was already caught.
    *
    * @param subtypeName name of the subtype
    * @param supertypeName name of the supertype
    */
-  static final HintCode DEAD_CODE_ON_CATCH_SUBTYPE = new HintCode.con1('DEAD_CODE_ON_CATCH_SUBTYPE', 3, "Dead code, this on-catch block will never be executed since '%s' is a subtype of '%s'");
+  static const HintCode DEAD_CODE_ON_CATCH_SUBTYPE = const HintCode.con1('DEAD_CODE_ON_CATCH_SUBTYPE', 3, "Dead code, this on-catch block will never be executed since '%s' is a subtype of '%s'");
 
   /**
    * Deprecated members should not be invoked or used.
    *
    * @param memberName the name of the member
    */
-  static final HintCode DEPRECATED_MEMBER_USE = new HintCode.con1('DEPRECATED_MEMBER_USE', 4, "'%s' is deprecated");
+  static const HintCode DEPRECATED_MEMBER_USE = const HintCode.con1('DEPRECATED_MEMBER_USE', 4, "'%s' is deprecated");
 
   /**
    * Duplicate imports.
    */
-  static final HintCode DUPLICATE_IMPORT = new HintCode.con1('DUPLICATE_IMPORT', 5, "Duplicate import");
+  static const HintCode DUPLICATE_IMPORT = const HintCode.con1('DUPLICATE_IMPORT', 5, "Duplicate import");
 
   /**
    * Hint to use the ~/ operator.
    */
-  static final HintCode DIVISION_OPTIMIZATION = new HintCode.con1('DIVISION_OPTIMIZATION', 6, "The operator x ~/ y is more efficient than (x / y).toInt()");
+  static const HintCode DIVISION_OPTIMIZATION = const HintCode.con1('DIVISION_OPTIMIZATION', 6, "The operator x ~/ y is more efficient than (x / y).toInt()");
 
   /**
    * Hint for the `x is double` type checks.
    */
-  static final HintCode IS_DOUBLE = new HintCode.con1('IS_DOUBLE', 7, "When compiled to JS, this test might return true when the left hand side is an int");
+  static const HintCode IS_DOUBLE = const HintCode.con1('IS_DOUBLE', 7, "When compiled to JS, this test might return true when the left hand side is an int");
 
   /**
    * Hint for the `x is int` type checks.
    */
-  static final HintCode IS_INT = new HintCode.con1('IS_INT', 8, "When compiled to JS, this test might return true when the left hand side is a double");
+  static const HintCode IS_INT = const HintCode.con1('IS_INT', 8, "When compiled to JS, this test might return true when the left hand side is a double");
 
   /**
    * Hint for the `x is! double` type checks.
    */
-  static final HintCode IS_NOT_DOUBLE = new HintCode.con1('IS_NOT_DOUBLE', 9, "When compiled to JS, this test might return false when the left hand side is an int");
+  static const HintCode IS_NOT_DOUBLE = const HintCode.con1('IS_NOT_DOUBLE', 9, "When compiled to JS, this test might return false when the left hand side is an int");
 
   /**
    * Hint for the `x is! int` type checks.
    */
-  static final HintCode IS_NOT_INT = new HintCode.con1('IS_NOT_INT', 10, "When compiled to JS, this test might return false when the left hand side is a double");
+  static const HintCode IS_NOT_INT = const HintCode.con1('IS_NOT_INT', 10, "When compiled to JS, this test might return false when the left hand side is a double");
 
   /**
    * Generate a hint for methods or functions that have a return type, but do not have a non-void
    * return statement on all branches. At the end of methods or functions with no return, Dart
    * implicitly returns `null`, avoiding these implicit returns is considered a best practice.
    *
    * @param returnType the name of the declared return type
    */
-  static final HintCode MISSING_RETURN = new HintCode.con2('MISSING_RETURN', 11, "This function declares a return type of '%s', but does not end with a return statement", "Either add a return statement or change the return type to 'void'");
+  static const HintCode MISSING_RETURN = const HintCode.con2('MISSING_RETURN', 11, "This function declares a return type of '%s', but does not end with a return statement", "Either add a return statement or change the return type to 'void'");
 
   /**
    * A getter with the override annotation does not override an existing getter.
    */
-  static final HintCode OVERRIDE_ON_NON_OVERRIDING_GETTER = new HintCode.con1('OVERRIDE_ON_NON_OVERRIDING_GETTER', 12, "Getter does not override an inherited getter");
+  static const HintCode OVERRIDE_ON_NON_OVERRIDING_GETTER = const HintCode.con1('OVERRIDE_ON_NON_OVERRIDING_GETTER', 12, "Getter does not override an inherited getter");
 
   /**
    * A method with the override annotation does not override an existing method.
    */
-  static final HintCode OVERRIDE_ON_NON_OVERRIDING_METHOD = new HintCode.con1('OVERRIDE_ON_NON_OVERRIDING_METHOD', 13, "Method does not override an inherited method");
+  static const HintCode OVERRIDE_ON_NON_OVERRIDING_METHOD = const HintCode.con1('OVERRIDE_ON_NON_OVERRIDING_METHOD', 13, "Method does not override an inherited method");
 
   /**
    * A setter with the override annotation does not override an existing setter.
    */
-  static final HintCode OVERRIDE_ON_NON_OVERRIDING_SETTER = new HintCode.con1('OVERRIDE_ON_NON_OVERRIDING_SETTER', 14, "Setter does not override an inherited setter");
+  static const HintCode OVERRIDE_ON_NON_OVERRIDING_SETTER = const HintCode.con1('OVERRIDE_ON_NON_OVERRIDING_SETTER', 14, "Setter does not override an inherited setter");
 
   /**
    * It is not in best practice to declare a private method that happens to override the method in a
    * superclass- depending on where the superclass is (either in the same library, or out of the
    * same library), behavior can be different.
    *
    * @param memberType this is either "method", "getter" or "setter"
    * @param memberName some private member name
    * @param className the class name where the member is overriding the functionality
    */
-  static final HintCode OVERRIDDING_PRIVATE_MEMBER = new HintCode.con1('OVERRIDDING_PRIVATE_MEMBER', 15, "The %s '%s' does not override the definition from '%s' because it is private and in a different library");
+  static const HintCode OVERRIDDING_PRIVATE_MEMBER = const HintCode.con1('OVERRIDDING_PRIVATE_MEMBER', 15, "The %s '%s' does not override the definition from '%s' because it is private and in a different library");
 
   /**
    * Hint for classes that override equals, but not hashCode.
    *
    * @param className the name of the current class
    */
-  static final HintCode OVERRIDE_EQUALS_BUT_NOT_HASH_CODE = new HintCode.con1('OVERRIDE_EQUALS_BUT_NOT_HASH_CODE', 16, "The class '%s' overrides 'operator==', but not 'get hashCode'");
+  static const HintCode OVERRIDE_EQUALS_BUT_NOT_HASH_CODE = const HintCode.con1('OVERRIDE_EQUALS_BUT_NOT_HASH_CODE', 16, "The class '%s' overrides 'operator==', but not 'get hashCode'");
 
   /**
    * Type checks of the type `x is! Null` should be done with `x != null`.
    */
-  static final HintCode TYPE_CHECK_IS_NOT_NULL = new HintCode.con1('TYPE_CHECK_IS_NOT_NULL', 17, "Tests for non-null should be done with '!= null'");
+  static const HintCode TYPE_CHECK_IS_NOT_NULL = const HintCode.con1('TYPE_CHECK_IS_NOT_NULL', 17, "Tests for non-null should be done with '!= null'");
 
   /**
    * Type checks of the type `x is Null` should be done with `x == null`.
    */
-  static final HintCode TYPE_CHECK_IS_NULL = new HintCode.con1('TYPE_CHECK_IS_NULL', 18, "Tests for null should be done with '== null'");
+  static const HintCode TYPE_CHECK_IS_NULL = const HintCode.con1('TYPE_CHECK_IS_NULL', 18, "Tests for null should be done with '== null'");
 
   /**
    * This hint is generated anywhere where the [StaticTypeWarningCode#UNDEFINED_GETTER] or
    * [StaticWarningCode#UNDEFINED_GETTER] would have been generated, if we used propagated
    * information for the warnings.
    *
    * @param getterName the name of the getter
    * @param enclosingType the name of the enclosing type where the getter is being looked for
    * @see StaticTypeWarningCode#UNDEFINED_GETTER
    * @see StaticWarningCode#UNDEFINED_GETTER
    */
-  static final HintCode UNDEFINED_GETTER = new HintCode.con1('UNDEFINED_GETTER', 19, StaticTypeWarningCode.UNDEFINED_GETTER.message);
+  static const HintCode UNDEFINED_GETTER = const HintCode.con1('UNDEFINED_GETTER', 19, "There is no such getter '%s' in '%s'");
 
   /**
    * This hint is generated anywhere where the [StaticTypeWarningCode#UNDEFINED_METHOD] would
    * have been generated, if we used propagated information for the warnings.
    *
    * @param methodName the name of the method that is undefined
    * @param typeName the resolved type name that the method lookup is happening on
    * @see StaticTypeWarningCode#UNDEFINED_METHOD
    */
-  static final HintCode UNDEFINED_METHOD = new HintCode.con1('UNDEFINED_METHOD', 20, StaticTypeWarningCode.UNDEFINED_METHOD.message);
+  static const HintCode UNDEFINED_METHOD = const HintCode.con1('UNDEFINED_METHOD', 20, "The method '%s' is not defined for the class '%s'");
 
   /**
    * This hint is generated anywhere where the [StaticTypeWarningCode#UNDEFINED_OPERATOR]
    * would have been generated, if we used propagated information for the warnings.
    *
    * @param operator the name of the operator
    * @param enclosingType the name of the enclosing type where the operator is being looked for
    * @see StaticTypeWarningCode#UNDEFINED_OPERATOR
    */
-  static final HintCode UNDEFINED_OPERATOR = new HintCode.con1('UNDEFINED_OPERATOR', 21, StaticTypeWarningCode.UNDEFINED_OPERATOR.message);
+  static const HintCode UNDEFINED_OPERATOR = const HintCode.con1('UNDEFINED_OPERATOR', 21, "There is no such operator '%s' in '%s'");
 
   /**
    * This hint is generated anywhere where the [StaticTypeWarningCode#UNDEFINED_SETTER] or
    * [StaticWarningCode#UNDEFINED_SETTER] would have been generated, if we used propagated
    * information for the warnings.
    *
    * @param setterName the name of the setter
    * @param enclosingType the name of the enclosing type where the setter is being looked for
    * @see StaticTypeWarningCode#UNDEFINED_SETTER
    * @see StaticWarningCode#UNDEFINED_SETTER
    */
-  static final HintCode UNDEFINED_SETTER = new HintCode.con1('UNDEFINED_SETTER', 22, StaticTypeWarningCode.UNDEFINED_SETTER.message);
+  static const HintCode UNDEFINED_SETTER = const HintCode.con1('UNDEFINED_SETTER', 22, "There is no such setter '%s' in '%s'");
 
   /**
    * Unnecessary cast.
    */
-  static final HintCode UNNECESSARY_CAST = new HintCode.con1('UNNECESSARY_CAST', 23, "Unnecessary cast");
+  static const HintCode UNNECESSARY_CAST = const HintCode.con1('UNNECESSARY_CAST', 23, "Unnecessary cast");
 
   /**
    * Unnecessary type checks, the result is always true.
    */
-  static final HintCode UNNECESSARY_TYPE_CHECK_FALSE = new HintCode.con1('UNNECESSARY_TYPE_CHECK_FALSE', 24, "Unnecessary type check, the result is always false");
+  static const HintCode UNNECESSARY_TYPE_CHECK_FALSE = const HintCode.con1('UNNECESSARY_TYPE_CHECK_FALSE', 24, "Unnecessary type check, the result is always false");
 
   /**
    * Unnecessary type checks, the result is always false.
    */
-  static final HintCode UNNECESSARY_TYPE_CHECK_TRUE = new HintCode.con1('UNNECESSARY_TYPE_CHECK_TRUE', 25, "Unnecessary type check, the result is always true");
+  static const HintCode UNNECESSARY_TYPE_CHECK_TRUE = const HintCode.con1('UNNECESSARY_TYPE_CHECK_TRUE', 25, "Unnecessary type check, the result is always true");
 
   /**
    * Unused imports are imports which are never not used.
    */
-  static final HintCode UNUSED_IMPORT = new HintCode.con1('UNUSED_IMPORT', 26, "Unused import");
+  static const HintCode UNUSED_IMPORT = const HintCode.con1('UNUSED_IMPORT', 26, "Unused import");
 
   /**
    * Hint for cases where the source expects a method or function to return a non-void result, but
    * the method or function signature returns void.
    *
    * @param name the name of the method or function that returns void
    */
-  static final HintCode USE_OF_VOID_RESULT = new HintCode.con1('USE_OF_VOID_RESULT', 27, "The result of '%s' is being used, even though it is declared to be 'void'");
+  static const HintCode USE_OF_VOID_RESULT = const HintCode.con1('USE_OF_VOID_RESULT', 27, "The result of '%s' is being used, even though it is declared to be 'void'");
 
-  static final List<HintCode> values = [
+  static const List<HintCode> values = const [
       ARGUMENT_TYPE_NOT_ASSIGNABLE,
       DEAD_CODE,
       DEAD_CODE_CATCH_FOLLOWING_CATCH,
       DEAD_CODE_ON_CATCH_SUBTYPE,
       DEPRECATED_MEMBER_USE,
       DUPLICATE_IMPORT,
       DIVISION_OPTIMIZATION,
       IS_DOUBLE,
       IS_INT,
       IS_NOT_DOUBLE,
@@ skipping 12 matching lines @@
       UNDEFINED_SETTER,
       UNNECESSARY_CAST,
       UNNECESSARY_TYPE_CHECK_FALSE,
       UNNECESSARY_TYPE_CHECK_TRUE,
       UNUSED_IMPORT,
       USE_OF_VOID_RESULT];
 
   /**
    * The template used to create the message to be displayed for this error.
    */
-  String message;
+  final String message;
 
   /**
    * The template used to create the correction to be displayed for this error, or `null` if
    * there is no correction information for this error.
    */
-  String correction3;
+  final String correction;
 
   /**
    * Initialize a newly created error code to have the given message.
    *
    * @param message the message template used to create the message to be displayed for the error
    */
-  HintCode.con1(String name, int ordinal, String message) : super(name, ordinal) {
-    this.message = message;
-  }
+  const HintCode.con1(String name, int ordinal, String message) : this.con2(name, ordinal, message, null);
 
   /**
    * Initialize a newly created error code to have the given message and correction.
    *
    * @param message the template used to create the message to be displayed for the error
    * @param correction the template used to create the correction to be displayed for the error
    */
-  HintCode.con2(String name, int ordinal, String message, String correction) : super(name, ordinal) {
-    this.message = message;
-    this.correction3 = correction;
-  }
-
-  @override
-  String get correction => correction3;
+  const HintCode.con2(String name, int ordinal, this.message, this.correction) : super(name, ordinal);
 
   @override
   ErrorSeverity get errorSeverity => ErrorType.HINT.severity;
 
   @override
   ErrorType get type => ErrorType.HINT;
 }
 
 /**
  * The interface `ErrorCode` defines the behavior common to objects representing error codes
@@ skipping 36 matching lines @@
   ErrorType get type;
 }
 
 /**
  * Instances of the enumeration `ErrorType` represent the type of an [ErrorCode].
  */
 class ErrorType extends Enum<ErrorType> {
   /**
    * Task (todo) comments in user code.
    */
-  static final ErrorType TODO = new ErrorType('TODO', 0, ErrorSeverity.INFO);
+  static const ErrorType TODO = const ErrorType('TODO', 0, ErrorSeverity.INFO);
 
   /**
    * Extra analysis run over the code to follow best practices, which are not in the Dart Language
    * Specification.
    */
-  static final ErrorType HINT = new ErrorType('HINT', 1, ErrorSeverity.INFO);
+  static const ErrorType HINT = const ErrorType('HINT', 1, ErrorSeverity.INFO);
 
   /**
    * Compile-time errors are errors that preclude execution. A compile time error must be reported
    * by a Dart compiler before the erroneous code is executed.
    */
-  static final ErrorType COMPILE_TIME_ERROR = new ErrorType('COMPILE_TIME_ERROR', 2, ErrorSeverity.ERROR);
+  static const ErrorType COMPILE_TIME_ERROR = const ErrorType('COMPILE_TIME_ERROR', 2, ErrorSeverity.ERROR);
 
   /**
    * Suggestions made in situations where the user has deviated from recommended pub programming
    * practices.
    */
-  static final ErrorType PUB_SUGGESTION = new ErrorType('PUB_SUGGESTION', 3, ErrorSeverity.WARNING);
+  static const ErrorType PUB_SUGGESTION = const ErrorType('PUB_SUGGESTION', 3, ErrorSeverity.WARNING);
 
   /**
    * Static warnings are those warnings reported by the static checker. They have no effect on
    * execution. Static warnings must be provided by Dart compilers used during development.
    */
-  static final ErrorType STATIC_WARNING = new ErrorType('STATIC_WARNING', 4, ErrorSeverity.WARNING);
+  static const ErrorType STATIC_WARNING = const ErrorType('STATIC_WARNING', 4, ErrorSeverity.WARNING);
 
   /**
    * Many, but not all, static warnings relate to types, in which case they are known as static type
    * warnings.
    */
-  static final ErrorType STATIC_TYPE_WARNING = new ErrorType('STATIC_TYPE_WARNING', 5, ErrorSeverity.WARNING);
+  static const ErrorType STATIC_TYPE_WARNING = const ErrorType('STATIC_TYPE_WARNING', 5, ErrorSeverity.WARNING);
 
   /**
    * Syntactic errors are errors produced as a result of input that does not conform to the grammar.
    */
-  static final ErrorType SYNTACTIC_ERROR = new ErrorType('SYNTACTIC_ERROR', 6, ErrorSeverity.ERROR);
+  static const ErrorType SYNTACTIC_ERROR = const ErrorType('SYNTACTIC_ERROR', 6, ErrorSeverity.ERROR);
 
   /**
    * Angular specific semantic problems.
    */
-  static final ErrorType ANGULAR = new ErrorType('ANGULAR', 7, ErrorSeverity.INFO);
+  static const ErrorType ANGULAR = const ErrorType('ANGULAR', 7, ErrorSeverity.INFO);
 
-  static final List<ErrorType> values = [
+  static const List<ErrorType> values = const [
       TODO,
       HINT,
       COMPILE_TIME_ERROR,
       PUB_SUGGESTION,
       STATIC_WARNING,
       STATIC_TYPE_WARNING,
       SYNTACTIC_ERROR,
       ANGULAR];
 
   /**
    * The severity of this type of error.
    */
-  ErrorSeverity severity;
+  final ErrorSeverity severity;
 
   /**
    * Initialize a newly created error type to have the given severity.
    *
    * @param severity the severity of this type of error
    */
-  ErrorType(String name, int ordinal, ErrorSeverity severity) : super(name, ordinal) {
-    this.severity = severity;
-  }
+  const ErrorType(String name, int ordinal, this.severity) : super(name, ordinal);
 
   String get displayName => name.toLowerCase().replaceAll('_', ' ');
 }
 
 /**
  * The enumeration `CompileTimeErrorCode` defines the error codes used for compile time
  * errors. The convention for this class is for the name of the error code to indicate the problem
  * that caused the error to be generated and for the error message to explain what is wrong and,
  * when appropriate, how the problem can be corrected.
  */
 class CompileTimeErrorCode extends Enum<CompileTimeErrorCode> implements ErrorCode {
   /**
    * 14.2 Exports: It is a compile-time error if a name <i>N</i> is re-exported by a library
    * <i>L</i> and <i>N</i> is introduced into the export namespace of <i>L</i> by more than one
    * export, unless each all exports refer to same declaration for the name N.
    *
    * @param ambiguousElementName the name of the ambiguous element
    * @param firstLibraryName the name of the first library that the type is found
    * @param secondLibraryName the name of the second library that the type is found
    */
-  static final CompileTimeErrorCode AMBIGUOUS_EXPORT = new CompileTimeErrorCode.con1('AMBIGUOUS_EXPORT', 0, "The element '%s' is defined in the libraries '%s' and '%s'");
+  static const CompileTimeErrorCode AMBIGUOUS_EXPORT = const CompileTimeErrorCode.con1('AMBIGUOUS_EXPORT', 0, "The element '%s' is defined in the libraries '%s' and '%s'");
 
   /**
    * 12.33 Argument Definition Test: It is a compile time error if <i>v</i> does not denote a formal
    * parameter.
    *
    * @param the name of the identifier in the argument definition test that is not a parameter
    */
-  static final CompileTimeErrorCode ARGUMENT_DEFINITION_TEST_NON_PARAMETER = new CompileTimeErrorCode.con1('ARGUMENT_DEFINITION_TEST_NON_PARAMETER', 1, "'%s' is not a parameter");
+  static const CompileTimeErrorCode ARGUMENT_DEFINITION_TEST_NON_PARAMETER = const CompileTimeErrorCode.con1('ARGUMENT_DEFINITION_TEST_NON_PARAMETER', 1, "'%s' is not a parameter");
 
   /**
    * 12.30 Identifier Reference: It is a compile-time error to use a built-in identifier other than
    * dynamic as a type annotation.
    */
-  static final CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE = new CompileTimeErrorCode.con1('BUILT_IN_IDENTIFIER_AS_TYPE', 2, "The built-in identifier '%s' cannot be as a type");
+  static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE = const CompileTimeErrorCode.con1('BUILT_IN_IDENTIFIER_AS_TYPE', 2, "The built-in identifier '%s' cannot be as a type");
 
   /**
    * 12.30 Identifier Reference: It is a compile-time error if a built-in identifier is used as the
    * declared name of a class, type parameter or type alias.
    */
-  static final CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE_NAME = new CompileTimeErrorCode.con1('BUILT_IN_IDENTIFIER_AS_TYPE_NAME', 3, "The built-in identifier '%s' cannot be used as a type name");
+  static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE_NAME = const CompileTimeErrorCode.con1('BUILT_IN_IDENTIFIER_AS_TYPE_NAME', 3, "The built-in identifier '%s' cannot be used as a type name");
 
   /**
    * 12.30 Identifier Reference: It is a compile-time error if a built-in identifier is used as the
    * declared name of a class, type parameter or type alias.
    */
-  static final CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME = new CompileTimeErrorCode.con1('BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME', 4, "The built-in identifier '%s' cannot be used as a type alias name");
+  static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME = const CompileTimeErrorCode.con1('BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME', 4, "The built-in identifier '%s' cannot be used as a type alias name");
 
   /**
    * 12.30 Identifier Reference: It is a compile-time error if a built-in identifier is used as the
    * declared name of a class, type parameter or type alias.
    */
-  static final CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE_PARAMETER_NAME = new CompileTimeErrorCode.con1('BUILT_IN_IDENTIFIER_AS_TYPE_PARAMETER_NAME', 5, "The built-in identifier '%s' cannot be used as a type parameter name");
+  static const CompileTimeErrorCode BUILT_IN_IDENTIFIER_AS_TYPE_PARAMETER_NAME = const CompileTimeErrorCode.con1('BUILT_IN_IDENTIFIER_AS_TYPE_PARAMETER_NAME', 5, "The built-in identifier '%s' cannot be used as a type parameter name");
 
   /**
    * 13.9 Switch: It is a compile-time error if the class <i>C</i> implements the operator
    * <i>==</i>.
    */
-  static final CompileTimeErrorCode CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS = new CompileTimeErrorCode.con1('CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS', 6, "The switch case expression type '%s' cannot override the == operator");
+  static const CompileTimeErrorCode CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS = const CompileTimeErrorCode.con1('CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS', 6, "The switch case expression type '%s' cannot override the == operator");
 
   /**
    * 12.1 Constants: It is a compile-time error if evaluation of a compile-time constant would raise
    * an exception.
    */
-  static final CompileTimeErrorCode COMPILE_TIME_CONSTANT_RAISES_EXCEPTION = new CompileTimeErrorCode.con1('COMPILE_TIME_CONSTANT_RAISES_EXCEPTION', 7, "");
+  static const CompileTimeErrorCode COMPILE_TIME_CONSTANT_RAISES_EXCEPTION = const CompileTimeErrorCode.con1('COMPILE_TIME_CONSTANT_RAISES_EXCEPTION', 7, "");
 
   /**
    * 7.2 Getters: It is a compile-time error if a class has both a getter and a method with the same
    * name. This restriction holds regardless of whether the getter is defined explicitly or
    * implicitly, or whether the getter or the method are inherited or not.
    */
-  static final CompileTimeErrorCode CONFLICTING_GETTER_AND_METHOD = new CompileTimeErrorCode.con1('CONFLICTING_GETTER_AND_METHOD', 8, "Class '%s' cannot have both getter '%s.%s' and method with the same name");
+  static const CompileTimeErrorCode CONFLICTING_GETTER_AND_METHOD = const CompileTimeErrorCode.con1('CONFLICTING_GETTER_AND_METHOD', 8, "Class '%s' cannot have both getter '%s.%s' and method with the same name");
 
   /**
    * 7.2 Getters: It is a compile-time error if a class has both a getter and a method with the same
    * name. This restriction holds regardless of whether the getter is defined explicitly or
    * implicitly, or whether the getter or the method are inherited or not.
    */
-  static final CompileTimeErrorCode CONFLICTING_METHOD_AND_GETTER = new CompileTimeErrorCode.con1('CONFLICTING_METHOD_AND_GETTER', 9, "Class '%s' cannot have both method '%s.%s' and getter with the same name");
+  static const CompileTimeErrorCode CONFLICTING_METHOD_AND_GETTER = const CompileTimeErrorCode.con1('CONFLICTING_METHOD_AND_GETTER', 9, "Class '%s' cannot have both method '%s.%s' and getter with the same name");
 
   /**
    * 7.6 Constructors: A constructor name always begins with the name of its immediately enclosing
    * class, and may optionally be followed by a dot and an identifier <i>id</i>. It is a
    * compile-time error if <i>id</i> is the name of a member declared in the immediately enclosing
    * class.
    */
-  static final CompileTimeErrorCode CONFLICTING_CONSTRUCTOR_NAME_AND_FIELD = new CompileTimeErrorCode.con1('CONFLICTING_CONSTRUCTOR_NAME_AND_FIELD', 10, "'%s' cannot be used to name a constructor and a field in this class");
+  static const CompileTimeErrorCode CONFLICTING_CONSTRUCTOR_NAME_AND_FIELD = const CompileTimeErrorCode.con1('CONFLICTING_CONSTRUCTOR_NAME_AND_FIELD', 10, "'%s' cannot be used to name a constructor and a field in this class");
 
   /**
    * 7.6 Constructors: A constructor name always begins with the name of its immediately enclosing
    * class, and may optionally be followed by a dot and an identifier <i>id</i>. It is a
    * compile-time error if <i>id</i> is the name of a member declared in the immediately enclosing
    * class.
    */
-  static final CompileTimeErrorCode CONFLICTING_CONSTRUCTOR_NAME_AND_METHOD = new CompileTimeErrorCode.con1('CONFLICTING_CONSTRUCTOR_NAME_AND_METHOD', 11, "'%s' cannot be used to name a constructor and a method in this class");
+  static const CompileTimeErrorCode CONFLICTING_CONSTRUCTOR_NAME_AND_METHOD = const CompileTimeErrorCode.con1('CONFLICTING_CONSTRUCTOR_NAME_AND_METHOD', 11, "'%s' cannot be used to name a constructor and a method in this class");
 
   /**
    * 7. Classes: It is a compile time error if a generic class declares a type variable with the
    * same name as the class or any of its members or constructors.
    */
-  static final CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_CLASS = new CompileTimeErrorCode.con1('CONFLICTING_TYPE_VARIABLE_AND_CLASS', 12, "'%s' cannot be used to name a type varaible in a class with the same name");
+  static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_CLASS = const CompileTimeErrorCode.con1('CONFLICTING_TYPE_VARIABLE_AND_CLASS', 12, "'%s' cannot be used to name a type varaible in a class with the same name");
 
   /**
    * 7. Classes: It is a compile time error if a generic class declares a type variable with the
    * same name as the class or any of its members or constructors.
    */
-  static final CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_MEMBER = new CompileTimeErrorCode.con1('CONFLICTING_TYPE_VARIABLE_AND_MEMBER', 13, "'%s' cannot be used to name a type varaible and member in this class");
+  static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_MEMBER = const CompileTimeErrorCode.con1('CONFLICTING_TYPE_VARIABLE_AND_MEMBER', 13, "'%s' cannot be used to name a type varaible and member in this class");
 
   /**
    * 12.11.2 Const: It is a compile-time error if evaluation of a constant object results in an
    * uncaught exception being thrown.
    */
-  static final CompileTimeErrorCode CONST_CONSTRUCTOR_THROWS_EXCEPTION = new CompileTimeErrorCode.con1('CONST_CONSTRUCTOR_THROWS_EXCEPTION', 14, "'const' constructors cannot throw exceptions");
+  static const CompileTimeErrorCode CONST_CONSTRUCTOR_THROWS_EXCEPTION = const CompileTimeErrorCode.con1('CONST_CONSTRUCTOR_THROWS_EXCEPTION', 14, "'const' constructors cannot throw exceptions");
 
   /**
    * 7.6.3 Constant Constructors: The superinitializer that appears, explicitly or implicitly, in
    * the initializer list of a constant constructor must specify a constant constructor of the
    * superclass of the immediately enclosing class or a compile-time error occurs.
    */
-  static final CompileTimeErrorCode CONST_CONSTRUCTOR_WITH_NON_CONST_SUPER = new CompileTimeErrorCode.con1('CONST_CONSTRUCTOR_WITH_NON_CONST_SUPER', 15, "Constant constructor cannot call non-constant super constructor");
+  static const CompileTimeErrorCode CONST_CONSTRUCTOR_WITH_NON_CONST_SUPER = const CompileTimeErrorCode.con1('CONST_CONSTRUCTOR_WITH_NON_CONST_SUPER', 15, "Constant constructor cannot call non-constant super constructor");
 
   /**
    * 7.6.3 Constant Constructors: It is a compile-time error if a constant constructor is declared
    * by a class that has a non-final instance variable.
    *
    * The above refers to both locally declared and inherited instance variables.
    */
-  static final CompileTimeErrorCode CONST_CONSTRUCTOR_WITH_NON_FINAL_FIELD = new CompileTimeErrorCode.con1('CONST_CONSTRUCTOR_WITH_NON_FINAL_FIELD', 16, "Cannot define the 'const' constructor for a class with non-final fields");
+  static const CompileTimeErrorCode CONST_CONSTRUCTOR_WITH_NON_FINAL_FIELD = const CompileTimeErrorCode.con1('CONST_CONSTRUCTOR_WITH_NON_FINAL_FIELD', 16, "Cannot define the 'const' constructor for a class with non-final fields");
 
   /**
    * 7.6.1 Generative Constructors: In checked mode, it is a dynamic type error if o is not
    * <b>null</b> and the interface of the class of <i>o</i> is not a subtype of the static type of
    * the field <i>v</i>.
    *
    * 12.11.2 Const: It is a compile-time error if evaluation of a constant object results in an
    * uncaught exception being thrown.
    *
    * @param initializerType the name of the type of the initializer expression
    * @param fieldType the name of the type of the field
    */
-  static final CompileTimeErrorCode CONST_FIELD_INITIALIZER_NOT_ASSIGNABLE = new CompileTimeErrorCode.con1('CONST_FIELD_INITIALIZER_NOT_ASSIGNABLE', 17, "The initializer type '%s' cannot be assigned to the field type '%s'");
+  static const CompileTimeErrorCode CONST_FIELD_INITIALIZER_NOT_ASSIGNABLE = const CompileTimeErrorCode.con1('CONST_FIELD_INITIALIZER_NOT_ASSIGNABLE', 17, "The initializer type '%s' cannot be assigned to the field type '%s'");
 
   /**
    * 6.2 Formal Parameters: It is a compile-time error if a formal parameter is declared as a
    * constant variable.
    */
-  static final CompileTimeErrorCode CONST_FORMAL_PARAMETER = new CompileTimeErrorCode.con1('CONST_FORMAL_PARAMETER', 18, "Parameters cannot be 'const'");
+  static const CompileTimeErrorCode CONST_FORMAL_PARAMETER = const CompileTimeErrorCode.con1('CONST_FORMAL_PARAMETER', 18, "Parameters cannot be 'const'");
 
   /**
    * 5 Variables: A constant variable must be initialized to a compile-time constant or a
    * compile-time error occurs.
    */
-  static final CompileTimeErrorCode CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE = new CompileTimeErrorCode.con1('CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE', 19, "'const' variables must be constant value");
+  static const CompileTimeErrorCode CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE = const CompileTimeErrorCode.con1('CONST_INITIALIZED_WITH_NON_CONSTANT_VALUE', 19, "'const' variables must be constant value");
 
   /**
    * 7.5 Instance Variables: It is a compile-time error if an instance variable is declared to be
    * constant.
    */
-  static final CompileTimeErrorCode CONST_INSTANCE_FIELD = new CompileTimeErrorCode.con1('CONST_INSTANCE_FIELD', 20, "Only static fields can be declared as 'const'");
+  static const CompileTimeErrorCode CONST_INSTANCE_FIELD = const CompileTimeErrorCode.con1('CONST_INSTANCE_FIELD', 20, "Only static fields can be declared as 'const'");
 
   /**
    * 12.8 Maps: It is a compile-time error if the key of an entry in a constant map literal is an
    * instance of a class that implements the operator <i>==</i> unless the key is a string or
    * integer.
    */
-  static final CompileTimeErrorCode CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS = new CompileTimeErrorCode.con1('CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS', 21, "The constant map entry key expression type '%s' cannot override the == operator");
+  static const CompileTimeErrorCode CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS = const CompileTimeErrorCode.con1('CONST_MAP_KEY_EXPRESSION_TYPE_IMPLEMENTS_EQUALS', 21, "The constant map entry key expression type '%s' cannot override the == operator");
 
   /**
    * 5 Variables: A constant variable must be initialized to a compile-time constant (12.1) or a
    * compile-time error occurs.
    *
    * @param name the name of the uninitialized final variable
    */
-  static final CompileTimeErrorCode CONST_NOT_INITIALIZED = new CompileTimeErrorCode.con1('CONST_NOT_INITIALIZED', 22, "The const variable '%s' must be initialized");
+  static const CompileTimeErrorCode CONST_NOT_INITIALIZED = const CompileTimeErrorCode.con1('CONST_NOT_INITIALIZED', 22, "The const variable '%s' must be initialized");
 
   /**
    * 12.11.2 Const: An expression of one of the forms !e, e1 && e2 or e1 || e2, where e, e1 and e2
    * are constant expressions that evaluate to a boolean value.
    */
-  static final CompileTimeErrorCode CONST_EVAL_TYPE_BOOL = new CompileTimeErrorCode.con1('CONST_EVAL_TYPE_BOOL', 23, "An expression of type 'bool' was expected");
+  static const CompileTimeErrorCode CONST_EVAL_TYPE_BOOL = const CompileTimeErrorCode.con1('CONST_EVAL_TYPE_BOOL', 23, "An expression of type 'bool' was expected");
 
   /**
    * 12.11.2 Const: An expression of one of the forms e1 == e2 or e1 != e2 where e1 and e2 are
    * constant expressions that evaluate to a numeric, string or boolean value or to null.
    */
-  static final CompileTimeErrorCode CONST_EVAL_TYPE_BOOL_NUM_STRING = new CompileTimeErrorCode.con1('CONST_EVAL_TYPE_BOOL_NUM_STRING', 24, "An expression of type 'bool', 'num', 'String' or 'null' was expected");
+  static const CompileTimeErrorCode CONST_EVAL_TYPE_BOOL_NUM_STRING = const CompileTimeErrorCode.con1('CONST_EVAL_TYPE_BOOL_NUM_STRING', 24, "An expression of type 'bool', 'num', 'String' or 'null' was expected");
 
   /**
    * 12.11.2 Const: An expression of one of the forms ~e, e1 ^ e2, e1 & e2, e1 | e2, e1 >> e2 or e1
    * << e2, where e, e1 and e2 are constant expressions that evaluate to an integer value or to
    * null.
    */
-  static final CompileTimeErrorCode CONST_EVAL_TYPE_INT = new CompileTimeErrorCode.con1('CONST_EVAL_TYPE_INT', 25, "An expression of type 'int' was expected");
+  static const CompileTimeErrorCode CONST_EVAL_TYPE_INT = const CompileTimeErrorCode.con1('CONST_EVAL_TYPE_INT', 25, "An expression of type 'int' was expected");
 
   /**
    * 12.11.2 Const: An expression of one of the forms e, e1 + e2, e1 - e2, e1 * e2, e1 / e2, e1 ~/
    * e2, e1 > e2, e1 < e2, e1 >= e2, e1 <= e2 or e1 % e2, where e, e1 and e2 are constant
    * expressions that evaluate to a numeric value or to null..
    */
-  static final CompileTimeErrorCode CONST_EVAL_TYPE_NUM = new CompileTimeErrorCode.con1('CONST_EVAL_TYPE_NUM', 26, "An expression of type 'num' was expected");
+  static const CompileTimeErrorCode CONST_EVAL_TYPE_NUM = const CompileTimeErrorCode.con1('CONST_EVAL_TYPE_NUM', 26, "An expression of type 'num' was expected");
 
   /**
    * 12.11.2 Const: It is a compile-time error if evaluation of a constant object results in an
    * uncaught exception being thrown.
    */
-  static final CompileTimeErrorCode CONST_EVAL_THROWS_EXCEPTION = new CompileTimeErrorCode.con1('CONST_EVAL_THROWS_EXCEPTION', 27, "Evaluation of this constant expression causes exception");
+  static const CompileTimeErrorCode CONST_EVAL_THROWS_EXCEPTION = const CompileTimeErrorCode.con1('CONST_EVAL_THROWS_EXCEPTION', 27, "Evaluation of this constant expression causes exception");
 
   /**
    * 12.11.2 Const: It is a compile-time error if evaluation of a constant object results in an
    * uncaught exception being thrown.
    */
-  static final CompileTimeErrorCode CONST_EVAL_THROWS_IDBZE = new CompileTimeErrorCode.con1('CONST_EVAL_THROWS_IDBZE', 28, "Evaluation of this constant expression throws IntegerDivisionByZeroException");
+  static const CompileTimeErrorCode CONST_EVAL_THROWS_IDBZE = const CompileTimeErrorCode.con1('CONST_EVAL_THROWS_IDBZE', 28, "Evaluation of this constant expression throws IntegerDivisionByZeroException");
 
   /**
    * 12.11.2 Const: If <i>T</i> is a parameterized type <i>S&lt;U<sub>1</sub>, &hellip;,
    * U<sub>m</sub>&gt;</i>, let <i>R = S</i>; It is a compile time error if <i>S</i> is not a
    * generic type with <i>m</i> type parameters.
    *
    * @param typeName the name of the type being referenced (<i>S</i>)
    * @param parameterCount the number of type parameters that were declared
    * @param argumentCount the number of type arguments provided
    * @see CompileTimeErrorCode#NEW_WITH_INVALID_TYPE_PARAMETERS
    * @see StaticTypeWarningCode#WRONG_NUMBER_OF_TYPE_ARGUMENTS
    */
-  static final CompileTimeErrorCode CONST_WITH_INVALID_TYPE_PARAMETERS = new CompileTimeErrorCode.con1('CONST_WITH_INVALID_TYPE_PARAMETERS', 29, "The type '%s' is declared with %d type parameters, but %d type arguments were given");
+  static const CompileTimeErrorCode CONST_WITH_INVALID_TYPE_PARAMETERS = const CompileTimeErrorCode.con1('CONST_WITH_INVALID_TYPE_PARAMETERS', 29, "The type '%s' is declared with %d type parameters, but %d type arguments were given");
 
   /**
    * 12.11.2 Const: If <i>e</i> is of the form <i>const T(a<sub>1</sub>, &hellip;, a<sub>n</sub>,
    * x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;, x<sub>n+k</sub>: a<sub>n+k</sub>)</i> it is a
    * compile-time error if the type <i>T</i> does not declare a constant constructor with the same
    * name as the declaration of <i>T</i>.
    */
-  static final CompileTimeErrorCode CONST_WITH_NON_CONST = new CompileTimeErrorCode.con1('CONST_WITH_NON_CONST', 30, "The constructor being called is not a 'const' constructor");
+  static const CompileTimeErrorCode CONST_WITH_NON_CONST = const CompileTimeErrorCode.con1('CONST_WITH_NON_CONST', 30, "The constructor being called is not a 'const' constructor");
 
   /**
    * 12.11.2 Const: In all of the above cases, it is a compile-time error if <i>a<sub>i</sub>, 1
    * &lt;= i &lt;= n + k</i>, is not a compile-time constant expression.
    */
-  static final CompileTimeErrorCode CONST_WITH_NON_CONSTANT_ARGUMENT = new CompileTimeErrorCode.con1('CONST_WITH_NON_CONSTANT_ARGUMENT', 31, "Arguments of a constant creation must be constant expressions");
+  static const CompileTimeErrorCode CONST_WITH_NON_CONSTANT_ARGUMENT = const CompileTimeErrorCode.con1('CONST_WITH_NON_CONSTANT_ARGUMENT', 31, "Arguments of a constant creation must be constant expressions");
 
   /**
    * 12.11.2 Const: It is a compile-time error if <i>T</i> is not a class accessible in the current
    * scope, optionally followed by type arguments.
    *
    * 12.11.2 Const: If <i>e</i> is of the form <i>const T.id(a<sub>1</sub>, &hellip;, a<sub>n</sub>,
    * x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip; x<sub>n+k</sub>: a<sub>n+k</sub>)</i> it is a
    * compile-time error if <i>T</i> is not a class accessible in the current scope, optionally
    * followed by type arguments.
    *
    * @param name the name of the non-type element
    */
-  static final CompileTimeErrorCode CONST_WITH_NON_TYPE = new CompileTimeErrorCode.con1('CONST_WITH_NON_TYPE', 32, "The name '%s' is not a class");
+  static const CompileTimeErrorCode CONST_WITH_NON_TYPE = const CompileTimeErrorCode.con1('CONST_WITH_NON_TYPE', 32, "The name '%s' is not a class");
 
   /**
    * 12.11.2 Const: It is a compile-time error if <i>T</i> includes any type parameters.
    */
-  static final CompileTimeErrorCode CONST_WITH_TYPE_PARAMETERS = new CompileTimeErrorCode.con1('CONST_WITH_TYPE_PARAMETERS', 33, "The constant creation cannot use a type parameter");
+  static const CompileTimeErrorCode CONST_WITH_TYPE_PARAMETERS = const CompileTimeErrorCode.con1('CONST_WITH_TYPE_PARAMETERS', 33, "The constant creation cannot use a type parameter");
 
   /**
    * 12.11.2 Const: It is a compile-time error if <i>T.id</i> is not the name of a constant
    * constructor declared by the type <i>T</i>.
    *
    * @param typeName the name of the type
    * @param constructorName the name of the requested constant constructor
    */
-  static final CompileTimeErrorCode CONST_WITH_UNDEFINED_CONSTRUCTOR = new CompileTimeErrorCode.con1('CONST_WITH_UNDEFINED_CONSTRUCTOR', 34, "The class '%s' does not have a constant constructor '%s'");
+  static const CompileTimeErrorCode CONST_WITH_UNDEFINED_CONSTRUCTOR = const CompileTimeErrorCode.con1('CONST_WITH_UNDEFINED_CONSTRUCTOR', 34, "The class '%s' does not have a constant constructor '%s'");
 
   /**
    * 12.11.2 Const: It is a compile-time error if <i>T.id</i> is not the name of a constant
    * constructor declared by the type <i>T</i>.
    *
    * @param typeName the name of the type
    */
-  static final CompileTimeErrorCode CONST_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT = new CompileTimeErrorCode.con1('CONST_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT', 35, "The class '%s' does not have a default constant constructor");
+  static const CompileTimeErrorCode CONST_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT = const CompileTimeErrorCode.con1('CONST_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT', 35, "The class '%s' does not have a default constant constructor");
 
   /**
    * 15.3.1 Typedef: It is a compile-time error if any default values are specified in the signature
    * of a function type alias.
    */
-  static final CompileTimeErrorCode DEFAULT_VALUE_IN_FUNCTION_TYPE_ALIAS = new CompileTimeErrorCode.con1('DEFAULT_VALUE_IN_FUNCTION_TYPE_ALIAS', 36, "Default values aren't allowed in typedefs");
+  static const CompileTimeErrorCode DEFAULT_VALUE_IN_FUNCTION_TYPE_ALIAS = const CompileTimeErrorCode.con1('DEFAULT_VALUE_IN_FUNCTION_TYPE_ALIAS', 36, "Default values aren't allowed in typedefs");
 
   /**
    * 6.2.1 Required Formals: By means of a function signature that names the parameter and describes
    * its type as a function type. It is a compile-time error if any default values are specified in
    * the signature of such a function type.
    */
-  static final CompileTimeErrorCode DEFAULT_VALUE_IN_FUNCTION_TYPED_PARAMETER = new CompileTimeErrorCode.con1('DEFAULT_VALUE_IN_FUNCTION_TYPED_PARAMETER', 37, "Default values aren't allowed in function type parameters");
+  static const CompileTimeErrorCode DEFAULT_VALUE_IN_FUNCTION_TYPED_PARAMETER = const CompileTimeErrorCode.con1('DEFAULT_VALUE_IN_FUNCTION_TYPED_PARAMETER', 37, "Default values aren't allowed in function type parameters");
 
   /**
    * 7.6.2 Factories: It is a compile-time error if <i>k</i> explicitly specifies a default value
    * for an optional parameter.
    */
-  static final CompileTimeErrorCode DEFAULT_VALUE_IN_REDIRECTING_FACTORY_CONSTRUCTOR = new CompileTimeErrorCode.con1('DEFAULT_VALUE_IN_REDIRECTING_FACTORY_CONSTRUCTOR', 38, "Default values aren't allowed in factory constructors that redirect to another constructor");
+  static const CompileTimeErrorCode DEFAULT_VALUE_IN_REDIRECTING_FACTORY_CONSTRUCTOR = const CompileTimeErrorCode.con1('DEFAULT_VALUE_IN_REDIRECTING_FACTORY_CONSTRUCTOR', 38, "Default values aren't allowed in factory constructors that redirect to another constructor");
 
   /**
    * 3.1 Scoping: It is a compile-time error if there is more than one entity with the same name
    * declared in the same scope.
    */
-  static final CompileTimeErrorCode DUPLICATE_CONSTRUCTOR_DEFAULT = new CompileTimeErrorCode.con1('DUPLICATE_CONSTRUCTOR_DEFAULT', 39, "The default constructor is already defined");
+  static const CompileTimeErrorCode DUPLICATE_CONSTRUCTOR_DEFAULT = const CompileTimeErrorCode.con1('DUPLICATE_CONSTRUCTOR_DEFAULT', 39, "The default constructor is already defined");
 
   /**
    * 3.1 Scoping: It is a compile-time error if there is more than one entity with the same name
    * declared in the same scope.
    *
    * @param duplicateName the name of the duplicate entity
    */
-  static final CompileTimeErrorCode DUPLICATE_CONSTRUCTOR_NAME = new CompileTimeErrorCode.con1('DUPLICATE_CONSTRUCTOR_NAME', 40, "The constructor with name '%s' is already defined");
+  static const CompileTimeErrorCode DUPLICATE_CONSTRUCTOR_NAME = const CompileTimeErrorCode.con1('DUPLICATE_CONSTRUCTOR_NAME', 40, "The constructor with name '%s' is already defined");
 
   /**
    * 3.1 Scoping: It is a compile-time error if there is more than one entity with the same name
    * declared in the same scope.
    *
    * 7 Classes: It is a compile-time error if a class declares two members of the same name.
    *
    * 7 Classes: It is a compile-time error if a class has an instance member and a static member
    * with the same name.
    *
    * @param duplicateName the name of the duplicate entity
    */
-  static final CompileTimeErrorCode DUPLICATE_DEFINITION = new CompileTimeErrorCode.con1('DUPLICATE_DEFINITION', 41, "The name '%s' is already defined");
+  static const CompileTimeErrorCode DUPLICATE_DEFINITION = const CompileTimeErrorCode.con1('DUPLICATE_DEFINITION', 41, "The name '%s' is already defined");
 
   /**
    * 7. Classes: It is a compile-time error if a class has an instance member and a static member
    * with the same name.
    *
    * This covers the additional duplicate definition cases where inheritance has to be considered.
    *
    * @param className the name of the class that has conflicting instance/static members
    * @param name the name of the conflicting members
    * @see #DUPLICATE_DEFINITION
    */
-  static final CompileTimeErrorCode DUPLICATE_DEFINITION_INHERITANCE = new CompileTimeErrorCode.con1('DUPLICATE_DEFINITION_INHERITANCE', 42, "The name '%s' is already defined in '%s'");
+  static const CompileTimeErrorCode DUPLICATE_DEFINITION_INHERITANCE = const CompileTimeErrorCode.con1('DUPLICATE_DEFINITION_INHERITANCE', 42, "The name '%s' is already defined in '%s'");
 
   /**
    * 12.14.2 Binding Actuals to Formals: It is a compile-time error if <i>q<sub>i</sub> =
    * q<sub>j</sub></i> for any <i>i != j</i> [where <i>q<sub>i</sub></i> is the label for a named
    * argument].
    */
-  static final CompileTimeErrorCode DUPLICATE_NAMED_ARGUMENT = new CompileTimeErrorCode.con1('DUPLICATE_NAMED_ARGUMENT', 43, "The argument for the named parameter '%s' was already specified");
+  static const CompileTimeErrorCode DUPLICATE_NAMED_ARGUMENT = const CompileTimeErrorCode.con1('DUPLICATE_NAMED_ARGUMENT', 43, "The argument for the named parameter '%s' was already specified");
 
   /**
    * SDK implementation libraries can be exported only by other SDK libraries.
    *
    * @param uri the uri pointing to a library
    */
-  static final CompileTimeErrorCode EXPORT_INTERNAL_LIBRARY = new CompileTimeErrorCode.con1('EXPORT_INTERNAL_LIBRARY', 44, "The library '%s' is internal and cannot be exported");
+  static const CompileTimeErrorCode EXPORT_INTERNAL_LIBRARY = const CompileTimeErrorCode.con1('EXPORT_INTERNAL_LIBRARY', 44, "The library '%s' is internal and cannot be exported");
 
   /**
    * 14.2 Exports: It is a compile-time error if the compilation unit found at the specified URI is
    * not a library declaration.
    *
    * @param uri the uri pointing to a non-library declaration
    */
-  static final CompileTimeErrorCode EXPORT_OF_NON_LIBRARY = new CompileTimeErrorCode.con1('EXPORT_OF_NON_LIBRARY', 45, "The exported library '%s' must not have a part-of directive");
+  static const CompileTimeErrorCode EXPORT_OF_NON_LIBRARY = const CompileTimeErrorCode.con1('EXPORT_OF_NON_LIBRARY', 45, "The exported library '%s' must not have a part-of directive");
 
   /**
    * 7.9 Superclasses: It is a compile-time error if the extends clause of a class <i>C</i> includes
    * a type expression that does not denote a class available in the lexical scope of <i>C</i>.
    *
    * @param typeName the name of the superclass that was not found
    */
-  static final CompileTimeErrorCode EXTENDS_NON_CLASS = new CompileTimeErrorCode.con1('EXTENDS_NON_CLASS', 46, "Classes can only extend other classes");
+  static const CompileTimeErrorCode EXTENDS_NON_CLASS = const CompileTimeErrorCode.con1('EXTENDS_NON_CLASS', 46, "Classes can only extend other classes");
 
   /**
    * 12.2 Null: It is a compile-time error for a class to attempt to extend or implement Null.
    *
    * 12.3 Numbers: It is a compile-time error for a class to attempt to extend or implement int.
    *
    * 12.3 Numbers: It is a compile-time error for a class to attempt to extend or implement double.
    *
    * 12.3 Numbers: It is a compile-time error for any type other than the types int and double to
    * attempt to extend or implement num.
    *
    * 12.4 Booleans: It is a compile-time error for a class to attempt to extend or implement bool.
    *
    * 12.5 Strings: It is a compile-time error for a class to attempt to extend or implement String.
    *
    * @param typeName the name of the type that cannot be extended
    * @see #IMPLEMENTS_DISALLOWED_CLASS
    */
-  static final CompileTimeErrorCode EXTENDS_DISALLOWED_CLASS = new CompileTimeErrorCode.con1('EXTENDS_DISALLOWED_CLASS', 47, "Classes cannot extend '%s'");
+  static const CompileTimeErrorCode EXTENDS_DISALLOWED_CLASS = const CompileTimeErrorCode.con1('EXTENDS_DISALLOWED_CLASS', 47, "Classes cannot extend '%s'");
 
   /**
    * 12.14.2 Binding Actuals to Formals: It is a static warning if <i>m &lt; h</i> or if <i>m &gt;
    * n</i>.
    *
    * 12.11.2 Const: It is a compile-time error if evaluation of a constant object results in an
    * uncaught exception being thrown.
    *
    * @param requiredCount the maximum number of positional arguments
    * @param argumentCount the actual number of positional arguments given
    */
-  static final CompileTimeErrorCode EXTRA_POSITIONAL_ARGUMENTS = new CompileTimeErrorCode.con1('EXTRA_POSITIONAL_ARGUMENTS', 48, "%d positional arguments expected, but %d found");
+  static const CompileTimeErrorCode EXTRA_POSITIONAL_ARGUMENTS = const CompileTimeErrorCode.con1('EXTRA_POSITIONAL_ARGUMENTS', 48, "%d positional arguments expected, but %d found");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It is a compile time
    * error if more than one initializer corresponding to a given instance variable appears in
    * <i>k</i>'s list.
    */
-  static final CompileTimeErrorCode FIELD_INITIALIZED_BY_MULTIPLE_INITIALIZERS = new CompileTimeErrorCode.con1('FIELD_INITIALIZED_BY_MULTIPLE_INITIALIZERS', 49, "The field '%s' cannot be initialized twice in the same constructor");
+  static const CompileTimeErrorCode FIELD_INITIALIZED_BY_MULTIPLE_INITIALIZERS = const CompileTimeErrorCode.con1('FIELD_INITIALIZED_BY_MULTIPLE_INITIALIZERS', 49, "The field '%s' cannot be initialized twice in the same constructor");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It is a compile time
    * error if <i>k</i>'s initializer list contains an initializer for a variable that is initialized
    * by means of an initializing formal of <i>k</i>.
    */
-  static final CompileTimeErrorCode FIELD_INITIALIZED_IN_PARAMETER_AND_INITIALIZER = new CompileTimeErrorCode.con1('FIELD_INITIALIZED_IN_PARAMETER_AND_INITIALIZER', 50, "Fields cannot be initialized in both the parameter list and the initializers");
+  static const CompileTimeErrorCode FIELD_INITIALIZED_IN_PARAMETER_AND_INITIALIZER = const CompileTimeErrorCode.con1('FIELD_INITIALIZED_IN_PARAMETER_AND_INITIALIZER', 50, "Fields cannot be initialized in both the parameter list and the initializers");
 
   /**
    * 5 Variables: It is a compile-time error if a final instance variable that has is initialized by
    * means of an initializing formal of a constructor is also initialized elsewhere in the same
    * constructor.
    *
    * @param name the name of the field in question
    */
-  static final CompileTimeErrorCode FINAL_INITIALIZED_MULTIPLE_TIMES = new CompileTimeErrorCode.con1('FINAL_INITIALIZED_MULTIPLE_TIMES', 51, "'%s' is a final field and so can only be set once");
+  static const CompileTimeErrorCode FINAL_INITIALIZED_MULTIPLE_TIMES = const CompileTimeErrorCode.con1('FINAL_INITIALIZED_MULTIPLE_TIMES', 51, "'%s' is a final field and so can only be set once");
 
   /**
    * 7.6.1 Generative Constructors: It is a compile-time error if an initializing formal is used by
    * a function other than a non-redirecting generative constructor.
    */
-  static final CompileTimeErrorCode FIELD_INITIALIZER_FACTORY_CONSTRUCTOR = new CompileTimeErrorCode.con1('FIELD_INITIALIZER_FACTORY_CONSTRUCTOR', 52, "Initializing formal fields cannot be used in factory constructors");
+  static const CompileTimeErrorCode FIELD_INITIALIZER_FACTORY_CONSTRUCTOR = const CompileTimeErrorCode.con1('FIELD_INITIALIZER_FACTORY_CONSTRUCTOR', 52, "Initializing formal fields cannot be used in factory constructors");
 
   /**
    * 7.6.1 Generative Constructors: It is a compile-time error if an initializing formal is used by
    * a function other than a non-redirecting generative constructor.
    */
-  static final CompileTimeErrorCode FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR = new CompileTimeErrorCode.con1('FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR', 53, "Initializing formal fields can only be used in constructors");
+  static const CompileTimeErrorCode FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR = const CompileTimeErrorCode.con1('FIELD_INITIALIZER_OUTSIDE_CONSTRUCTOR', 53, "Initializing formal fields can only be used in constructors");
 
   /**
    * 7.6.1 Generative Constructors: A generative constructor may be redirecting, in which case its
    * only action is to invoke another generative constructor.
    *
    * 7.6.1 Generative Constructors: It is a compile-time error if an initializing formal is used by
    * a function other than a non-redirecting generative constructor.
    */
-  static final CompileTimeErrorCode FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR = new CompileTimeErrorCode.con1('FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR', 54, "The redirecting constructor cannot have a field initializer");
+  static const CompileTimeErrorCode FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR = const CompileTimeErrorCode.con1('FIELD_INITIALIZER_REDIRECTING_CONSTRUCTOR', 54, "The redirecting constructor cannot have a field initializer");
 
   /**
    * 7.2 Getters: It is a compile-time error if a class has both a getter and a method with the same
    * name.
    *
    * @param name the conflicting name of the getter and method
    */
-  static final CompileTimeErrorCode GETTER_AND_METHOD_WITH_SAME_NAME = new CompileTimeErrorCode.con1('GETTER_AND_METHOD_WITH_SAME_NAME', 55, "'%s' cannot be used to name a getter, there is already a method with the same name");
+  static const CompileTimeErrorCode GETTER_AND_METHOD_WITH_SAME_NAME = const CompileTimeErrorCode.con1('GETTER_AND_METHOD_WITH_SAME_NAME', 55, "'%s' cannot be used to name a getter, there is already a method with the same name");
 
   /**
    * 12.2 Null: It is a compile-time error for a class to attempt to extend or implement Null.
    *
    * 12.3 Numbers: It is a compile-time error for a class to attempt to extend or implement int.
    *
    * 12.3 Numbers: It is a compile-time error for a class to attempt to extend or implement double.
    *
    * 12.3 Numbers: It is a compile-time error for any type other than the types int and double to
    * attempt to extend or implement num.
    *
    * 12.4 Booleans: It is a compile-time error for a class to attempt to extend or implement bool.
    *
    * 12.5 Strings: It is a compile-time error for a class to attempt to extend or implement String.
    *
    * @param typeName the name of the type that cannot be implemented
    * @see #EXTENDS_DISALLOWED_CLASS
    */
-  static final CompileTimeErrorCode IMPLEMENTS_DISALLOWED_CLASS = new CompileTimeErrorCode.con1('IMPLEMENTS_DISALLOWED_CLASS', 56, "Classes cannot implement '%s'");
+  static const CompileTimeErrorCode IMPLEMENTS_DISALLOWED_CLASS = const CompileTimeErrorCode.con1('IMPLEMENTS_DISALLOWED_CLASS', 56, "Classes cannot implement '%s'");
 
   /**
    * 7.10 Superinterfaces: It is a compile-time error if the implements clause of a class includes
    * type dynamic.
    */
-  static final CompileTimeErrorCode IMPLEMENTS_DYNAMIC = new CompileTimeErrorCode.con1('IMPLEMENTS_DYNAMIC', 57, "Classes cannot implement 'dynamic'");
+  static const CompileTimeErrorCode IMPLEMENTS_DYNAMIC = const CompileTimeErrorCode.con1('IMPLEMENTS_DYNAMIC', 57, "Classes cannot implement 'dynamic'");
 
   /**
    * 7.10 Superinterfaces: It is a compile-time error if the implements clause of a class <i>C</i>
    * includes a type expression that does not denote a class available in the lexical scope of
    * <i>C</i>.
    *
    * @param typeName the name of the interface that was not found
    */
-  static final CompileTimeErrorCode IMPLEMENTS_NON_CLASS = new CompileTimeErrorCode.con1('IMPLEMENTS_NON_CLASS', 58, "Classes can only implement other classes");
+  static const CompileTimeErrorCode IMPLEMENTS_NON_CLASS = const CompileTimeErrorCode.con1('IMPLEMENTS_NON_CLASS', 58, "Classes can only implement other classes");
 
   /**
    * 7.10 Superinterfaces: It is a compile-time error if a type <i>T</i> appears more than once in
    * the implements clause of a class.
    *
    * @param className the name of the class that is implemented more than once
    */
-  static final CompileTimeErrorCode IMPLEMENTS_REPEATED = new CompileTimeErrorCode.con1('IMPLEMENTS_REPEATED', 59, "'%s' can only be implemented once");
+  static const CompileTimeErrorCode IMPLEMENTS_REPEATED = const CompileTimeErrorCode.con1('IMPLEMENTS_REPEATED', 59, "'%s' can only be implemented once");
 
   /**
    * 7.10 Superinterfaces: It is a compile-time error if the superclass of a class <i>C</i> appears
    * in the implements clause of <i>C</i>.
    *
    * @param className the name of the class that appears in both "extends" and "implements" clauses
    */
-  static final CompileTimeErrorCode IMPLEMENTS_SUPER_CLASS = new CompileTimeErrorCode.con1('IMPLEMENTS_SUPER_CLASS', 60, "'%s' cannot be used in both 'extends' and 'implements' clauses");
+  static const CompileTimeErrorCode IMPLEMENTS_SUPER_CLASS = const CompileTimeErrorCode.con1('IMPLEMENTS_SUPER_CLASS', 60, "'%s' cannot be used in both 'extends' and 'implements' clauses");
 
   /**
    * 7.6.1 Generative Constructors: Note that <b>this</b> is not in scope on the right hand side of
    * an initializer.
    *
    * 12.10 This: It is a compile-time error if this appears in a top-level function or variable
    * initializer, in a factory constructor, or in a static method or variable initializer, or in the
    * initializer of an instance variable.
    *
    * @param name the name of the type in question
    */
-  static final CompileTimeErrorCode IMPLICIT_THIS_REFERENCE_IN_INITIALIZER = new CompileTimeErrorCode.con1('IMPLICIT_THIS_REFERENCE_IN_INITIALIZER', 61, "Only static members can be accessed in initializers");
+  static const CompileTimeErrorCode IMPLICIT_THIS_REFERENCE_IN_INITIALIZER = const CompileTimeErrorCode.con1('IMPLICIT_THIS_REFERENCE_IN_INITIALIZER', 61, "Only static members can be accessed in initializers");
 
   /**
    * SDK implementation libraries can be imported only by other SDK libraries.
    *
    * @param uri the uri pointing to a library
    */
-  static final CompileTimeErrorCode IMPORT_INTERNAL_LIBRARY = new CompileTimeErrorCode.con1('IMPORT_INTERNAL_LIBRARY', 62, "The library '%s' is internal and cannot be imported");
+  static const CompileTimeErrorCode IMPORT_INTERNAL_LIBRARY = const CompileTimeErrorCode.con1('IMPORT_INTERNAL_LIBRARY', 62, "The library '%s' is internal and cannot be imported");
 
   /**
    * 14.1 Imports: It is a compile-time error if the compilation unit found at the specified URI is
    * not a library declaration.
    *
    * @param uri the uri pointing to a non-library declaration
    */
-  static final CompileTimeErrorCode IMPORT_OF_NON_LIBRARY = new CompileTimeErrorCode.con1('IMPORT_OF_NON_LIBRARY', 63, "The imported library '%s' must not have a part-of directive");
+  static const CompileTimeErrorCode IMPORT_OF_NON_LIBRARY = const CompileTimeErrorCode.con1('IMPORT_OF_NON_LIBRARY', 63, "The imported library '%s' must not have a part-of directive");
 
   /**
    * 13.9 Switch: It is a compile-time error if values of the expressions <i>e<sub>k</sub></i> are
    * not instances of the same class <i>C</i>, for all <i>1 &lt;= k &lt;= n</i>.
    *
    * @param expressionSource the expression source code that is the unexpected type
    * @param expectedType the name of the expected type
    */
-  static final CompileTimeErrorCode INCONSISTENT_CASE_EXPRESSION_TYPES = new CompileTimeErrorCode.con1('INCONSISTENT_CASE_EXPRESSION_TYPES', 64, "Case expressions must have the same types, '%s' is not a %s'");
+  static const CompileTimeErrorCode INCONSISTENT_CASE_EXPRESSION_TYPES = const CompileTimeErrorCode.con1('INCONSISTENT_CASE_EXPRESSION_TYPES', 64, "Case expressions must have the same types, '%s' is not a %s'");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It is a compile-time
    * error if <i>k</i>'s initializer list contains an initializer for a variable that is not an
    * instance variable declared in the immediately surrounding class.
    *
    * @param id the name of the initializing formal that is not an instance variable in the
    *          immediately enclosing class
    * @see #INITIALIZING_FORMAL_FOR_NON_EXISTANT_FIELD
    */
-  static final CompileTimeErrorCode INITIALIZER_FOR_NON_EXISTANT_FIELD = new CompileTimeErrorCode.con1('INITIALIZER_FOR_NON_EXISTANT_FIELD', 65, "'%s' is not a variable in the enclosing class");
+  static const CompileTimeErrorCode INITIALIZER_FOR_NON_EXISTANT_FIELD = const CompileTimeErrorCode.con1('INITIALIZER_FOR_NON_EXISTANT_FIELD', 65, "'%s' is not a variable in the enclosing class");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It is a compile-time
    * error if <i>k</i>'s initializer list contains an initializer for a variable that is not an
    * instance variable declared in the immediately surrounding class.
    *
    * @param id the name of the initializing formal that is a static variable in the immediately
    *          enclosing class
    * @see #INITIALIZING_FORMAL_FOR_STATIC_FIELD
    */
-  static final CompileTimeErrorCode INITIALIZER_FOR_STATIC_FIELD = new CompileTimeErrorCode.con1('INITIALIZER_FOR_STATIC_FIELD', 66, "'%s' is a static variable in the enclosing class, variables initialized in a constructor cannot be static");
+  static const CompileTimeErrorCode INITIALIZER_FOR_STATIC_FIELD = const CompileTimeErrorCode.con1('INITIALIZER_FOR_STATIC_FIELD', 66, "'%s' is a static variable in the enclosing class, variables initialized in a constructor cannot be static");
 
   /**
    * 7.6.1 Generative Constructors: An initializing formal has the form <i>this.id</i>. It is a
    * compile-time error if <i>id</i> is not the name of an instance variable of the immediately
    * enclosing class.
    *
    * @param id the name of the initializing formal that is not an instance variable in the
    *          immediately enclosing class
    * @see #INITIALIZING_FORMAL_FOR_STATIC_FIELD
    * @see #INITIALIZER_FOR_NON_EXISTANT_FIELD
    */
-  static final CompileTimeErrorCode INITIALIZING_FORMAL_FOR_NON_EXISTANT_FIELD = new CompileTimeErrorCode.con1('INITIALIZING_FORMAL_FOR_NON_EXISTANT_FIELD', 67, "'%s' is not a variable in the enclosing class");
+  static const CompileTimeErrorCode INITIALIZING_FORMAL_FOR_NON_EXISTANT_FIELD = const CompileTimeErrorCode.con1('INITIALIZING_FORMAL_FOR_NON_EXISTANT_FIELD', 67, "'%s' is not a variable in the enclosing class");
 
   /**
    * 7.6.1 Generative Constructors: An initializing formal has the form <i>this.id</i>. It is a
    * compile-time error if <i>id</i> is not the name of an instance variable of the immediately
    * enclosing class.
    *
    * @param id the name of the initializing formal that is a static variable in the immediately
    *          enclosing class
    * @see #INITIALIZER_FOR_STATIC_FIELD
    */
-  static final CompileTimeErrorCode INITIALIZING_FORMAL_FOR_STATIC_FIELD = new CompileTimeErrorCode.con1('INITIALIZING_FORMAL_FOR_STATIC_FIELD', 68, "'%s' is a static variable in the enclosing class, variables initialized in a constructor cannot be static");
+  static const CompileTimeErrorCode INITIALIZING_FORMAL_FOR_STATIC_FIELD = const CompileTimeErrorCode.con1('INITIALIZING_FORMAL_FOR_STATIC_FIELD', 68, "'%s' is a static variable in the enclosing class, variables initialized in a constructor cannot be static");
 
   /**
    * 12.30 Identifier Reference: Otherwise, e is equivalent to the property extraction
    * <b>this</b>.<i>id</i>.
    */
-  static final CompileTimeErrorCode INSTANCE_MEMBER_ACCESS_FROM_STATIC = new CompileTimeErrorCode.con1('INSTANCE_MEMBER_ACCESS_FROM_STATIC', 69, "Instance member cannot be accessed from static method");
+  static const CompileTimeErrorCode INSTANCE_MEMBER_ACCESS_FROM_STATIC = const CompileTimeErrorCode.con1('INSTANCE_MEMBER_ACCESS_FROM_STATIC', 69, "Instance member cannot be accessed from static method");
 
   /**
    * 11 Metadata: Metadata consists of a series of annotations, each of which begin with the
    * character @, followed by a constant expression that must be either a reference to a
    * compile-time constant variable, or a call to a constant constructor.
    */
-  static final CompileTimeErrorCode INVALID_ANNOTATION = new CompileTimeErrorCode.con1('INVALID_ANNOTATION', 70, "Annotation can be only constant variable or constant constructor invocation");
+  static const CompileTimeErrorCode INVALID_ANNOTATION = const CompileTimeErrorCode.con1('INVALID_ANNOTATION', 70, "Annotation can be only constant variable or constant constructor invocation");
 
   /**
    * TODO(brianwilkerson) Remove this when we have decided on how to report errors in compile-time
    * constants. Until then, this acts as a placeholder for more informative errors.
    *
    * See TODOs in ConstantVisitor
    */
-  static final CompileTimeErrorCode INVALID_CONSTANT = new CompileTimeErrorCode.con1('INVALID_CONSTANT', 71, "Invalid constant value");
+  static const CompileTimeErrorCode INVALID_CONSTANT = const CompileTimeErrorCode.con1('INVALID_CONSTANT', 71, "Invalid constant value");
 
   /**
    * 7.6 Constructors: It is a compile-time error if the name of a constructor is not a constructor
    * name.
    */
-  static final CompileTimeErrorCode INVALID_CONSTRUCTOR_NAME = new CompileTimeErrorCode.con1('INVALID_CONSTRUCTOR_NAME', 72, "Invalid constructor name");
+  static const CompileTimeErrorCode INVALID_CONSTRUCTOR_NAME = const CompileTimeErrorCode.con1('INVALID_CONSTRUCTOR_NAME', 72, "Invalid constructor name");
 
   /**
    * 7.6.2 Factories: It is a compile-time error if <i>M</i> is not the name of the immediately
    * enclosing class.
    */
-  static final CompileTimeErrorCode INVALID_FACTORY_NAME_NOT_A_CLASS = new CompileTimeErrorCode.con1('INVALID_FACTORY_NAME_NOT_A_CLASS', 73, "The name of the immediately enclosing class expected");
+  static const CompileTimeErrorCode INVALID_FACTORY_NAME_NOT_A_CLASS = const CompileTimeErrorCode.con1('INVALID_FACTORY_NAME_NOT_A_CLASS', 73, "The name of the immediately enclosing class expected");
 
   /**
    * 12.10 This: It is a compile-time error if this appears in a top-level function or variable
    * initializer, in a factory constructor, or in a static method or variable initializer, or in the
    * initializer of an instance variable.
    */
-  static final CompileTimeErrorCode INVALID_REFERENCE_TO_THIS = new CompileTimeErrorCode.con1('INVALID_REFERENCE_TO_THIS', 74, "Invalid reference to 'this' expression");
+  static const CompileTimeErrorCode INVALID_REFERENCE_TO_THIS = const CompileTimeErrorCode.con1('INVALID_REFERENCE_TO_THIS', 74, "Invalid reference to 'this' expression");
 
   /**
    * 12.6 Lists: It is a compile time error if the type argument of a constant list literal includes
    * a type parameter.
    *
    * @name the name of the type parameter
    */
-  static final CompileTimeErrorCode INVALID_TYPE_ARGUMENT_IN_CONST_LIST = new CompileTimeErrorCode.con1('INVALID_TYPE_ARGUMENT_IN_CONST_LIST', 75, "Constant list literals cannot include a type parameter as a type argument, such as '%s'");
+  static const CompileTimeErrorCode INVALID_TYPE_ARGUMENT_IN_CONST_LIST = const CompileTimeErrorCode.con1('INVALID_TYPE_ARGUMENT_IN_CONST_LIST', 75, "Constant list literals cannot include a type parameter as a type argument, such as '%s'");
 
   /**
    * 12.7 Maps: It is a compile time error if the type arguments of a constant map literal include a
    * type parameter.
    *
    * @name the name of the type parameter
    */
-  static final CompileTimeErrorCode INVALID_TYPE_ARGUMENT_IN_CONST_MAP = new CompileTimeErrorCode.con1('INVALID_TYPE_ARGUMENT_IN_CONST_MAP', 76, "Constant map literals cannot include a type parameter as a type argument, such as '%s'");
+  static const CompileTimeErrorCode INVALID_TYPE_ARGUMENT_IN_CONST_MAP = const CompileTimeErrorCode.con1('INVALID_TYPE_ARGUMENT_IN_CONST_MAP', 76, "Constant map literals cannot include a type parameter as a type argument, such as '%s'");
 
   /**
    * 14.2 Exports: It is a compile-time error if the compilation unit found at the specified URI is
    * not a library declaration.
    *
    * 14.1 Imports: It is a compile-time error if the compilation unit found at the specified URI is
    * not a library declaration.
    *
    * 14.3 Parts: It is a compile time error if the contents of the URI are not a valid part
    * declaration.
    *
    * @param uri the URI that is invalid
    * @see #URI_DOES_NOT_EXIST
    */
-  static final CompileTimeErrorCode INVALID_URI = new CompileTimeErrorCode.con1('INVALID_URI', 77, "Invalid URI syntax: '%s'");
+  static const CompileTimeErrorCode INVALID_URI = const CompileTimeErrorCode.con1('INVALID_URI', 77, "Invalid URI syntax: '%s'");
 
   /**
    * 13.13 Break: It is a compile-time error if no such statement <i>s<sub>E</sub></i> exists within
    * the innermost function in which <i>s<sub>b</sub></i> occurs.
    *
    * 13.14 Continue: It is a compile-time error if no such statement or case clause
    * <i>s<sub>E</sub></i> exists within the innermost function in which <i>s<sub>c</sub></i> occurs.
    *
    * @param labelName the name of the unresolvable label
    */
-  static final CompileTimeErrorCode LABEL_IN_OUTER_SCOPE = new CompileTimeErrorCode.con1('LABEL_IN_OUTER_SCOPE', 78, "Cannot reference label '%s' declared in an outer method");
+  static const CompileTimeErrorCode LABEL_IN_OUTER_SCOPE = const CompileTimeErrorCode.con1('LABEL_IN_OUTER_SCOPE', 78, "Cannot reference label '%s' declared in an outer method");
 
   /**
    * 13.13 Break: It is a compile-time error if no such statement <i>s<sub>E</sub></i> exists within
    * the innermost function in which <i>s<sub>b</sub></i> occurs.
    *
    * 13.14 Continue: It is a compile-time error if no such statement or case clause
    * <i>s<sub>E</sub></i> exists within the innermost function in which <i>s<sub>c</sub></i> occurs.
    *
    * @param labelName the name of the unresolvable label
    */
-  static final CompileTimeErrorCode LABEL_UNDEFINED = new CompileTimeErrorCode.con1('LABEL_UNDEFINED', 79, "Cannot reference undefined label '%s'");
+  static const CompileTimeErrorCode LABEL_UNDEFINED = const CompileTimeErrorCode.con1('LABEL_UNDEFINED', 79, "Cannot reference undefined label '%s'");
 
   /**
    * 12.6 Lists: A run-time list literal &lt;<i>E</i>&gt; [<i>e<sub>1</sub></i> ...
    * <i>e<sub>n</sub></i>] is evaluated as follows:
    * * The operator []= is invoked on <i>a</i> with first argument <i>i</i> and second argument
    * <i>o<sub>i+1</sub></i><i>, 1 &lt;= i &lt;= n</i>
    *
    * 12.14.2 Binding Actuals to Formals: Let <i>T<sub>i</sub></i> be the static type of
    * <i>a<sub>i</sub></i>, let <i>S<sub>i</sub></i> be the type of <i>p<sub>i</sub>, 1 &lt;= i &lt;=
    * n+k</i> and let <i>S<sub>q</sub></i> be the type of the named parameter <i>q</i> of <i>f</i>.
    * It is a static warning if <i>T<sub>j</sub></i> may not be assigned to <i>S<sub>j</sub>, 1 &lt;=
    * j &lt;= m</i>.
    */
-  static final CompileTimeErrorCode LIST_ELEMENT_TYPE_NOT_ASSIGNABLE = new CompileTimeErrorCode.con1('LIST_ELEMENT_TYPE_NOT_ASSIGNABLE', 80, "The element type '%s' cannot be assigned to the list type '%s'");
+  static const CompileTimeErrorCode LIST_ELEMENT_TYPE_NOT_ASSIGNABLE = const CompileTimeErrorCode.con1('LIST_ELEMENT_TYPE_NOT_ASSIGNABLE', 80, "The element type '%s' cannot be assigned to the list type '%s'");
 
   /**
    * 12.7 Map: A run-time map literal &lt;<i>K</i>, <i>V</i>&gt; [<i>k<sub>1</sub></i> :
    * <i>e<sub>1</sub></i> ... <i>k<sub>n</sub></i> : <i>e<sub>n</sub></i>] is evaluated as follows:
    * * The operator []= is invoked on <i>m</i> with first argument <i>k<sub>i</sub></i> and second
    * argument <i>e<sub>i</sub></i><i>, 1 &lt;= i &lt;= n</i>
    *
    * 12.14.2 Binding Actuals to Formals: Let <i>T<sub>i</sub></i> be the static type of
    * <i>a<sub>i</sub></i>, let <i>S<sub>i</sub></i> be the type of <i>p<sub>i</sub>, 1 &lt;= i &lt;=
    * n+k</i> and let <i>S<sub>q</sub></i> be the type of the named parameter <i>q</i> of <i>f</i>.
    * It is a static warning if <i>T<sub>j</sub></i> may not be assigned to <i>S<sub>j</sub>, 1 &lt;=
    * j &lt;= m</i>.
    */
-  static final CompileTimeErrorCode MAP_KEY_TYPE_NOT_ASSIGNABLE = new CompileTimeErrorCode.con1('MAP_KEY_TYPE_NOT_ASSIGNABLE', 81, "The element type '%s' cannot be assigned to the map key type '%s'");
+  static const CompileTimeErrorCode MAP_KEY_TYPE_NOT_ASSIGNABLE = const CompileTimeErrorCode.con1('MAP_KEY_TYPE_NOT_ASSIGNABLE', 81, "The element type '%s' cannot be assigned to the map key type '%s'");
 
   /**
    * 12.7 Map: A run-time map literal &lt;<i>K</i>, <i>V</i>&gt; [<i>k<sub>1</sub></i> :
    * <i>e<sub>1</sub></i> ... <i>k<sub>n</sub></i> : <i>e<sub>n</sub></i>] is evaluated as follows:
    * * The operator []= is invoked on <i>m</i> with first argument <i>k<sub>i</sub></i> and second
    * argument <i>e<sub>i</sub></i><i>, 1 &lt;= i &lt;= n</i>
    *
    * 12.14.2 Binding Actuals to Formals: Let <i>T<sub>i</sub></i> be the static type of
    * <i>a<sub>i</sub></i>, let <i>S<sub>i</sub></i> be the type of <i>p<sub>i</sub>, 1 &lt;= i &lt;=
    * n+k</i> and let <i>S<sub>q</sub></i> be the type of the named parameter <i>q</i> of <i>f</i>.
    * It is a static warning if <i>T<sub>j</sub></i> may not be assigned to <i>S<sub>j</sub>, 1 &lt;=
    * j &lt;= m</i>.
    */
-  static final CompileTimeErrorCode MAP_VALUE_TYPE_NOT_ASSIGNABLE = new CompileTimeErrorCode.con1('MAP_VALUE_TYPE_NOT_ASSIGNABLE', 82, "The element type '%s' cannot be assigned to the map value type '%s'");
+  static const CompileTimeErrorCode MAP_VALUE_TYPE_NOT_ASSIGNABLE = const CompileTimeErrorCode.con1('MAP_VALUE_TYPE_NOT_ASSIGNABLE', 82, "The element type '%s' cannot be assigned to the map value type '%s'");
 
   /**
    * 7 Classes: It is a compile time error if a class <i>C</i> declares a member with the same name
    * as <i>C</i>.
    */
-  static final CompileTimeErrorCode MEMBER_WITH_CLASS_NAME = new CompileTimeErrorCode.con1('MEMBER_WITH_CLASS_NAME', 83, "Class members cannot have the same name as the enclosing class");
+  static const CompileTimeErrorCode MEMBER_WITH_CLASS_NAME = const CompileTimeErrorCode.con1('MEMBER_WITH_CLASS_NAME', 83, "Class members cannot have the same name as the enclosing class");
 
   /**
    * 7.2 Getters: It is a compile-time error if a class has both a getter and a method with the same
    * name.
    *
    * @param name the conflicting name of the getter and method
    */
-  static final CompileTimeErrorCode METHOD_AND_GETTER_WITH_SAME_NAME = new CompileTimeErrorCode.con1('METHOD_AND_GETTER_WITH_SAME_NAME', 84, "'%s' cannot be used to name a method, there is already a getter with the same name");
+  static const CompileTimeErrorCode METHOD_AND_GETTER_WITH_SAME_NAME = const CompileTimeErrorCode.con1('METHOD_AND_GETTER_WITH_SAME_NAME', 84, "'%s' cannot be used to name a method, there is already a getter with the same name");
 
   /**
    * 12.1 Constants: A constant expression is ... a constant list literal.
    */
-  static final CompileTimeErrorCode MISSING_CONST_IN_LIST_LITERAL = new CompileTimeErrorCode.con1('MISSING_CONST_IN_LIST_LITERAL', 85, "List literals must be prefixed with 'const' when used as a constant expression");
+  static const CompileTimeErrorCode MISSING_CONST_IN_LIST_LITERAL = const CompileTimeErrorCode.con1('MISSING_CONST_IN_LIST_LITERAL', 85, "List literals must be prefixed with 'const' when used as a constant expression");
 
   /**
    * 12.1 Constants: A constant expression is ... a constant map literal.
    */
-  static final CompileTimeErrorCode MISSING_CONST_IN_MAP_LITERAL = new CompileTimeErrorCode.con1('MISSING_CONST_IN_MAP_LITERAL', 86, "Map literals must be prefixed with 'const' when used as a constant expression");
+  static const CompileTimeErrorCode MISSING_CONST_IN_MAP_LITERAL = const CompileTimeErrorCode.con1('MISSING_CONST_IN_MAP_LITERAL', 86, "Map literals must be prefixed with 'const' when used as a constant expression");
 
   /**
    * 9 Mixins: It is a compile-time error if a declared or derived mixin explicitly declares a
    * constructor.
    *
    * @param typeName the name of the mixin that is invalid
    */
-  static final CompileTimeErrorCode MIXIN_DECLARES_CONSTRUCTOR = new CompileTimeErrorCode.con1('MIXIN_DECLARES_CONSTRUCTOR', 87, "The class '%s' cannot be used as a mixin because it declares a constructor");
+  static const CompileTimeErrorCode MIXIN_DECLARES_CONSTRUCTOR = const CompileTimeErrorCode.con1('MIXIN_DECLARES_CONSTRUCTOR', 87, "The class '%s' cannot be used as a mixin because it declares a constructor");
 
   /**
    * 9 Mixins: It is a compile-time error if a mixin is derived from a class whose superclass is not
    * Object.
    *
    * @param typeName the name of the mixin that is invalid
    */
-  static final CompileTimeErrorCode MIXIN_INHERITS_FROM_NOT_OBJECT = new CompileTimeErrorCode.con1('MIXIN_INHERITS_FROM_NOT_OBJECT', 88, "The class '%s' cannot be used as a mixin because it extends a class other than Object");
+  static const CompileTimeErrorCode MIXIN_INHERITS_FROM_NOT_OBJECT = const CompileTimeErrorCode.con1('MIXIN_INHERITS_FROM_NOT_OBJECT', 88, "The class '%s' cannot be used as a mixin because it extends a class other than Object");
 
   /**
    * 12.2 Null: It is a compile-time error for a class to attempt to extend or implement Null.
    *
    * 12.3 Numbers: It is a compile-time error for a class to attempt to extend or implement int.
    *
    * 12.3 Numbers: It is a compile-time error for a class to attempt to extend or implement double.
    *
    * 12.3 Numbers: It is a compile-time error for any type other than the types int and double to
    * attempt to extend or implement num.
    *
    * 12.4 Booleans: It is a compile-time error for a class to attempt to extend or implement bool.
    *
    * 12.5 Strings: It is a compile-time error for a class to attempt to extend or implement String.
    *
    * @param typeName the name of the type that cannot be extended
    * @see #IMPLEMENTS_DISALLOWED_CLASS
    */
-  static final CompileTimeErrorCode MIXIN_OF_DISALLOWED_CLASS = new CompileTimeErrorCode.con1('MIXIN_OF_DISALLOWED_CLASS', 89, "Classes cannot mixin '%s'");
+  static const CompileTimeErrorCode MIXIN_OF_DISALLOWED_CLASS = const CompileTimeErrorCode.con1('MIXIN_OF_DISALLOWED_CLASS', 89, "Classes cannot mixin '%s'");
 
   /**
    * 9.1 Mixin Application: It is a compile-time error if <i>M</i> does not denote a class or mixin
    * available in the immediately enclosing scope.
    */
-  static final CompileTimeErrorCode MIXIN_OF_NON_CLASS = new CompileTimeErrorCode.con1('MIXIN_OF_NON_CLASS', 90, "Classes can only mixin other classes");
+  static const CompileTimeErrorCode MIXIN_OF_NON_CLASS = const CompileTimeErrorCode.con1('MIXIN_OF_NON_CLASS', 90, "Classes can only mixin other classes");
 
   /**
    * 9 Mixins: It is a compile-time error if a declared or derived mixin refers to super.
    */
-  static final CompileTimeErrorCode MIXIN_REFERENCES_SUPER = new CompileTimeErrorCode.con1('MIXIN_REFERENCES_SUPER', 91, "The class '%s' cannot be used as a mixin because it references 'super'");
+  static const CompileTimeErrorCode MIXIN_REFERENCES_SUPER = const CompileTimeErrorCode.con1('MIXIN_REFERENCES_SUPER', 91, "The class '%s' cannot be used as a mixin because it references 'super'");
 
   /**
    * 9.1 Mixin Application: It is a compile-time error if <i>S</i> does not denote a class available
    * in the immediately enclosing scope.
    */
-  static final CompileTimeErrorCode MIXIN_WITH_NON_CLASS_SUPERCLASS = new CompileTimeErrorCode.con1('MIXIN_WITH_NON_CLASS_SUPERCLASS', 92, "Mixin can only be applied to class");
+  static const CompileTimeErrorCode MIXIN_WITH_NON_CLASS_SUPERCLASS = const CompileTimeErrorCode.con1('MIXIN_WITH_NON_CLASS_SUPERCLASS', 92, "Mixin can only be applied to class");
 
   /**
    * 7.6.1 Generative Constructors: A generative constructor may be redirecting, in which case its
    * only action is to invoke another generative constructor.
    */
-  static final CompileTimeErrorCode MULTIPLE_REDIRECTING_CONSTRUCTOR_INVOCATIONS = new CompileTimeErrorCode.con1('MULTIPLE_REDIRECTING_CONSTRUCTOR_INVOCATIONS', 93, "Constructor may have at most one 'this' redirection");
+  static const CompileTimeErrorCode MULTIPLE_REDIRECTING_CONSTRUCTOR_INVOCATIONS = const CompileTimeErrorCode.con1('MULTIPLE_REDIRECTING_CONSTRUCTOR_INVOCATIONS', 93, "Constructor may have at most one 'this' redirection");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. Then <i>k</i> may
    * include at most one superinitializer in its initializer list or a compile time error occurs.
    */
-  static final CompileTimeErrorCode MULTIPLE_SUPER_INITIALIZERS = new CompileTimeErrorCode.con1('MULTIPLE_SUPER_INITIALIZERS', 94, "Constructor may have at most one 'super' initializer");
+  static const CompileTimeErrorCode MULTIPLE_SUPER_INITIALIZERS = const CompileTimeErrorCode.con1('MULTIPLE_SUPER_INITIALIZERS', 94, "Constructor may have at most one 'super' initializer");
 
   /**
    * 11 Metadata: Metadata consists of a series of annotations, each of which begin with the
    * character @, followed by a constant expression that must be either a reference to a
    * compile-time constant variable, or a call to a constant constructor.
    */
-  static final CompileTimeErrorCode NO_ANNOTATION_CONSTRUCTOR_ARGUMENTS = new CompileTimeErrorCode.con1('NO_ANNOTATION_CONSTRUCTOR_ARGUMENTS', 95, "Annotation creation must have arguments");
+  static const CompileTimeErrorCode NO_ANNOTATION_CONSTRUCTOR_ARGUMENTS = const CompileTimeErrorCode.con1('NO_ANNOTATION_CONSTRUCTOR_ARGUMENTS', 95, "Annotation creation must have arguments");
 
   /**
    * 7.6.1 Generative Constructors: If no superinitializer is provided, an implicit superinitializer
    * of the form <b>super</b>() is added at the end of <i>k</i>'s initializer list, unless the
    * enclosing class is class <i>Object</i>.
    *
    * 7.6.1 Generative constructors. It is a compile-time error if class <i>S</i> does not declare a
    * generative constructor named <i>S</i> (respectively <i>S.id</i>)
    */
-  static final CompileTimeErrorCode NO_DEFAULT_SUPER_CONSTRUCTOR_EXPLICIT = new CompileTimeErrorCode.con1('NO_DEFAULT_SUPER_CONSTRUCTOR_EXPLICIT', 96, "The class '%s' does not have a default constructor");
+  static const CompileTimeErrorCode NO_DEFAULT_SUPER_CONSTRUCTOR_EXPLICIT = const CompileTimeErrorCode.con1('NO_DEFAULT_SUPER_CONSTRUCTOR_EXPLICIT', 96, "The class '%s' does not have a default constructor");
 
   /**
    * 7.6 Constructors: Iff no constructor is specified for a class <i>C</i>, it implicitly has a
    * default constructor C() : <b>super<b>() {}, unless <i>C</i> is class <i>Object</i>.
    *
    * 7.6.1 Generative constructors. It is a compile-time error if class <i>S</i> does not declare a
    * generative constructor named <i>S</i> (respectively <i>S.id</i>)
    */
-  static final CompileTimeErrorCode NO_DEFAULT_SUPER_CONSTRUCTOR_IMPLICIT = new CompileTimeErrorCode.con1('NO_DEFAULT_SUPER_CONSTRUCTOR_IMPLICIT', 97, "The class '%s' does not have a default constructor");
+  static const CompileTimeErrorCode NO_DEFAULT_SUPER_CONSTRUCTOR_IMPLICIT = const CompileTimeErrorCode.con1('NO_DEFAULT_SUPER_CONSTRUCTOR_IMPLICIT', 97, "The class '%s' does not have a default constructor");
 
   /**
    * 13.2 Expression Statements: It is a compile-time error if a non-constant map literal that has
    * no explicit type arguments appears in a place where a statement is expected.
    */
-  static final CompileTimeErrorCode NON_CONST_MAP_AS_EXPRESSION_STATEMENT = new CompileTimeErrorCode.con1('NON_CONST_MAP_AS_EXPRESSION_STATEMENT', 98, "A non-constant map literal without type arguments cannot be used as an expression statement");
+  static const CompileTimeErrorCode NON_CONST_MAP_AS_EXPRESSION_STATEMENT = const CompileTimeErrorCode.con1('NON_CONST_MAP_AS_EXPRESSION_STATEMENT', 98, "A non-constant map literal without type arguments cannot be used as an expression statement");
 
   /**
    * 13.9 Switch: Given a switch statement of the form <i>switch (e) { label<sub>11</sub> &hellip;
    * label<sub>1j1</sub> case e<sub>1</sub>: s<sub>1</sub> &hellip; label<sub>n1</sub> &hellip;
    * label<sub>njn</sub> case e<sub>n</sub>: s<sub>n</sub> default: s<sub>n+1</sub>}</i> or the form
    * <i>switch (e) { label<sub>11</sub> &hellip; label<sub>1j1</sub> case e<sub>1</sub>:
    * s<sub>1</sub> &hellip; label<sub>n1</sub> &hellip; label<sub>njn</sub> case e<sub>n</sub>:
    * s<sub>n</sub>}</i>, it is a compile-time error if the expressions <i>e<sub>k</sub></i> are not
    * compile-time constants, for all <i>1 &lt;= k &lt;= n</i>.
    */
-  static final CompileTimeErrorCode NON_CONSTANT_CASE_EXPRESSION = new CompileTimeErrorCode.con1('NON_CONSTANT_CASE_EXPRESSION', 99, "Case expressions must be constant");
+  static const CompileTimeErrorCode NON_CONSTANT_CASE_EXPRESSION = const CompileTimeErrorCode.con1('NON_CONSTANT_CASE_EXPRESSION', 99, "Case expressions must be constant");
 
   /**
    * 6.2.2 Optional Formals: It is a compile-time error if the default value of an optional
    * parameter is not a compile-time constant.
    */
-  static final CompileTimeErrorCode NON_CONSTANT_DEFAULT_VALUE = new CompileTimeErrorCode.con1('NON_CONSTANT_DEFAULT_VALUE', 100, "Default values of an optional parameter must be constant");
+  static const CompileTimeErrorCode NON_CONSTANT_DEFAULT_VALUE = const CompileTimeErrorCode.con1('NON_CONSTANT_DEFAULT_VALUE', 100, "Default values of an optional parameter must be constant");
 
   /**
    * 12.6 Lists: It is a compile time error if an element of a constant list literal is not a
    * compile-time constant.
    */
-  static final CompileTimeErrorCode NON_CONSTANT_LIST_ELEMENT = new CompileTimeErrorCode.con1('NON_CONSTANT_LIST_ELEMENT', 101, "'const' lists must have all constant values");
+  static const CompileTimeErrorCode NON_CONSTANT_LIST_ELEMENT = const CompileTimeErrorCode.con1('NON_CONSTANT_LIST_ELEMENT', 101, "'const' lists must have all constant values");
 
   /**
    * 12.7 Maps: It is a compile time error if either a key or a value of an entry in a constant map
    * literal is not a compile-time constant.
    */
-  static final CompileTimeErrorCode NON_CONSTANT_MAP_KEY = new CompileTimeErrorCode.con1('NON_CONSTANT_MAP_KEY', 102, "The keys in a map must be constant");
+  static const CompileTimeErrorCode NON_CONSTANT_MAP_KEY = const CompileTimeErrorCode.con1('NON_CONSTANT_MAP_KEY', 102, "The keys in a map must be constant");
 
   /**
    * 12.7 Maps: It is a compile time error if either a key or a value of an entry in a constant map
    * literal is not a compile-time constant.
    */
-  static final CompileTimeErrorCode NON_CONSTANT_MAP_VALUE = new CompileTimeErrorCode.con1('NON_CONSTANT_MAP_VALUE', 103, "The values in a 'const' map must be constant");
+  static const CompileTimeErrorCode NON_CONSTANT_MAP_VALUE = const CompileTimeErrorCode.con1('NON_CONSTANT_MAP_VALUE', 103, "The values in a 'const' map must be constant");
 
   /**
    * 11 Metadata: Metadata consists of a series of annotations, each of which begin with the
    * character @, followed by a constant expression that must be either a reference to a
    * compile-time constant variable, or a call to a constant constructor.
    */
-  static final CompileTimeErrorCode NON_CONSTANT_ANNOTATION_CONSTRUCTOR = new CompileTimeErrorCode.con1('NON_CONSTANT_ANNOTATION_CONSTRUCTOR', 104, "Annotation creation can use only 'const' constructor");
+  static const CompileTimeErrorCode NON_CONSTANT_ANNOTATION_CONSTRUCTOR = const CompileTimeErrorCode.con1('NON_CONSTANT_ANNOTATION_CONSTRUCTOR', 104, "Annotation creation can use only 'const' constructor");
 
   /**
    * 7.6.3 Constant Constructors: Any expression that appears within the initializer list of a
    * constant constructor must be a potentially constant expression, or a compile-time error occurs.
    */
-  static final CompileTimeErrorCode NON_CONSTANT_VALUE_IN_INITIALIZER = new CompileTimeErrorCode.con1('NON_CONSTANT_VALUE_IN_INITIALIZER', 105, "Initializer expressions in constant constructors must be constants");
+  static const CompileTimeErrorCode NON_CONSTANT_VALUE_IN_INITIALIZER = const CompileTimeErrorCode.con1('NON_CONSTANT_VALUE_IN_INITIALIZER', 105, "Initializer expressions in constant constructors must be constants");
 
   /**
    * 12.14.2 Binding Actuals to Formals: It is a static warning if <i>m < h</i> or if <i>m > n</i>.
    *
    * 12.11.2 Const: It is a compile-time error if evaluation of a constant object results in an
    * uncaught exception being thrown.
    *
    * @param requiredCount the expected number of required arguments
    * @param argumentCount the actual number of positional arguments given
    */
-  static final CompileTimeErrorCode NOT_ENOUGH_REQUIRED_ARGUMENTS = new CompileTimeErrorCode.con1('NOT_ENOUGH_REQUIRED_ARGUMENTS', 106, "%d required argument(s) expected, but %d found");
+  static const CompileTimeErrorCode NOT_ENOUGH_REQUIRED_ARGUMENTS = const CompileTimeErrorCode.con1('NOT_ENOUGH_REQUIRED_ARGUMENTS', 106, "%d required argument(s) expected, but %d found");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>C</i> be the class in which the superinitializer appears
    * and let <i>S</i> be the superclass of <i>C</i>. Let <i>k</i> be a generative constructor. It is
    * a compile-time error if class <i>S</i> does not declare a generative constructor named <i>S</i>
    * (respectively <i>S.id</i>)
    */
-  static final CompileTimeErrorCode NON_GENERATIVE_CONSTRUCTOR = new CompileTimeErrorCode.con1('NON_GENERATIVE_CONSTRUCTOR', 107, "The generative constructor '%s' expected, but factory found");
+  static const CompileTimeErrorCode NON_GENERATIVE_CONSTRUCTOR = const CompileTimeErrorCode.con1('NON_GENERATIVE_CONSTRUCTOR', 107, "The generative constructor '%s' expected, but factory found");
 
   /**
    * 7.9 Superclasses: It is a compile-time error to specify an extends clause for class Object.
    */
-  static final CompileTimeErrorCode OBJECT_CANNOT_EXTEND_ANOTHER_CLASS = new CompileTimeErrorCode.con1('OBJECT_CANNOT_EXTEND_ANOTHER_CLASS', 108, "");
+  static const CompileTimeErrorCode OBJECT_CANNOT_EXTEND_ANOTHER_CLASS = const CompileTimeErrorCode.con1('OBJECT_CANNOT_EXTEND_ANOTHER_CLASS', 108, "");
 
   /**
    * 7.1.1 Operators: It is a compile-time error to declare an optional parameter in an operator.
    */
-  static final CompileTimeErrorCode OPTIONAL_PARAMETER_IN_OPERATOR = new CompileTimeErrorCode.con1('OPTIONAL_PARAMETER_IN_OPERATOR', 109, "Optional parameters are not allowed when defining an operator");
+  static const CompileTimeErrorCode OPTIONAL_PARAMETER_IN_OPERATOR = const CompileTimeErrorCode.con1('OPTIONAL_PARAMETER_IN_OPERATOR', 109, "Optional parameters are not allowed when defining an operator");
 
   /**
    * 14.3 Parts: It is a compile time error if the contents of the URI are not a valid part
    * declaration.
    *
    * @param uri the uri pointing to a non-library declaration
    */
-  static final CompileTimeErrorCode PART_OF_NON_PART = new CompileTimeErrorCode.con1('PART_OF_NON_PART', 110, "The included part '%s' must have a part-of directive");
+  static const CompileTimeErrorCode PART_OF_NON_PART = const CompileTimeErrorCode.con1('PART_OF_NON_PART', 110, "The included part '%s' must have a part-of directive");
 
   /**
    * 14.1 Imports: It is a compile-time error if the current library declares a top-level member
    * named <i>p</i>.
    */
-  static final CompileTimeErrorCode PREFIX_COLLIDES_WITH_TOP_LEVEL_MEMBER = new CompileTimeErrorCode.con1('PREFIX_COLLIDES_WITH_TOP_LEVEL_MEMBER', 111, "The name '%s' is already used as an import prefix and cannot be used to name a top-level element");
+  static const CompileTimeErrorCode PREFIX_COLLIDES_WITH_TOP_LEVEL_MEMBER = const CompileTimeErrorCode.con1('PREFIX_COLLIDES_WITH_TOP_LEVEL_MEMBER', 111, "The name '%s' is already used as an import prefix and cannot be used to name a top-level element");
 
   /**
    * 6.2.2 Optional Formals: It is a compile-time error if the name of a named optional parameter
    * begins with an '_' character.
    */
-  static final CompileTimeErrorCode PRIVATE_OPTIONAL_PARAMETER = new CompileTimeErrorCode.con1('PRIVATE_OPTIONAL_PARAMETER', 112, "Named optional parameters cannot start with an underscore");
+  static const CompileTimeErrorCode PRIVATE_OPTIONAL_PARAMETER = const CompileTimeErrorCode.con1('PRIVATE_OPTIONAL_PARAMETER', 112, "Named optional parameters cannot start with an underscore");
 
   /**
    * 12.1 Constants: It is a compile-time error if the value of a compile-time constant expression
    * depends on itself.
    */
-  static final CompileTimeErrorCode RECURSIVE_COMPILE_TIME_CONSTANT = new CompileTimeErrorCode.con1('RECURSIVE_COMPILE_TIME_CONSTANT', 113, "");
+  static const CompileTimeErrorCode RECURSIVE_COMPILE_TIME_CONSTANT = const CompileTimeErrorCode.con1('RECURSIVE_COMPILE_TIME_CONSTANT', 113, "");
 
   /**
    * 7.6.1 Generative Constructors: A generative constructor may be redirecting, in which case its
    * only action is to invoke another generative constructor.
    *
    * TODO(scheglov) review this later, there are no explicit "it is a compile-time error" in
    * specification. But it was added to the co19 and there is same error for factories.
    *
    * https://code.google.com/p/dart/issues/detail?id=954
    */
-  static final CompileTimeErrorCode RECURSIVE_CONSTRUCTOR_REDIRECT = new CompileTimeErrorCode.con1('RECURSIVE_CONSTRUCTOR_REDIRECT', 114, "Cycle in redirecting generative constructors");
+  static const CompileTimeErrorCode RECURSIVE_CONSTRUCTOR_REDIRECT = const CompileTimeErrorCode.con1('RECURSIVE_CONSTRUCTOR_REDIRECT', 114, "Cycle in redirecting generative constructors");
 
   /**
    * 7.6.2 Factories: It is a compile-time error if a redirecting factory constructor redirects to
    * itself, either directly or indirectly via a sequence of redirections.
    */
-  static final CompileTimeErrorCode RECURSIVE_FACTORY_REDIRECT = new CompileTimeErrorCode.con1('RECURSIVE_FACTORY_REDIRECT', 115, "Cycle in redirecting factory constructors");
+  static const CompileTimeErrorCode RECURSIVE_FACTORY_REDIRECT = const CompileTimeErrorCode.con1('RECURSIVE_FACTORY_REDIRECT', 115, "Cycle in redirecting factory constructors");
 
   /**
    * 7.10 Superinterfaces: It is a compile-time error if the interface of a class <i>C</i> is a
    * superinterface of itself.
    *
    * 8.1 Superinterfaces: It is a compile-time error if an interface is a superinterface of itself.
    *
    * 7.9 Superclasses: It is a compile-time error if a class <i>C</i> is a superclass of itself.
    *
    * @param className the name of the class that implements itself recursively
    * @param strImplementsPath a string representation of the implements loop
    */
-  static final CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE = new CompileTimeErrorCode.con1('RECURSIVE_INTERFACE_INHERITANCE', 116, "'%s' cannot be a superinterface of itself: %s");
+  static const CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE = const CompileTimeErrorCode.con1('RECURSIVE_INTERFACE_INHERITANCE', 116, "'%s' cannot be a superinterface of itself: %s");
 
   /**
    * 7.10 Superinterfaces: It is a compile-time error if the interface of a class <i>C</i> is a
    * superinterface of itself.
    *
    * 8.1 Superinterfaces: It is a compile-time error if an interface is a superinterface of itself.
    *
    * 7.9 Superclasses: It is a compile-time error if a class <i>C</i> is a superclass of itself.
    *
    * @param className the name of the class that implements itself recursively
    */
-  static final CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE_BASE_CASE_EXTENDS = new CompileTimeErrorCode.con1('RECURSIVE_INTERFACE_INHERITANCE_BASE_CASE_EXTENDS', 117, "'%s' cannot extend itself");
+  static const CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE_BASE_CASE_EXTENDS = const CompileTimeErrorCode.con1('RECURSIVE_INTERFACE_INHERITANCE_BASE_CASE_EXTENDS', 117, "'%s' cannot extend itself");
 
   /**
    * 7.10 Superinterfaces: It is a compile-time error if the interface of a class <i>C</i> is a
    * superinterface of itself.
    *
    * 8.1 Superinterfaces: It is a compile-time error if an interface is a superinterface of itself.
    *
    * 7.9 Superclasses: It is a compile-time error if a class <i>C</i> is a superclass of itself.
    *
    * @param className the name of the class that implements itself recursively
    */
-  static final CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE_BASE_CASE_IMPLEMENTS = new CompileTimeErrorCode.con1('RECURSIVE_INTERFACE_INHERITANCE_BASE_CASE_IMPLEMENTS', 118, "'%s' cannot implement itself");
+  static const CompileTimeErrorCode RECURSIVE_INTERFACE_INHERITANCE_BASE_CASE_IMPLEMENTS = const CompileTimeErrorCode.con1('RECURSIVE_INTERFACE_INHERITANCE_BASE_CASE_IMPLEMENTS', 118, "'%s' cannot implement itself");
 
   /**
    * 7.6.2 Factories: It is a compile-time error if <i>k</i> is prefixed with the const modifier but
    * <i>k'</i> is not a constant constructor.
    */
-  static final CompileTimeErrorCode REDIRECT_TO_MISSING_CONSTRUCTOR = new CompileTimeErrorCode.con1('REDIRECT_TO_MISSING_CONSTRUCTOR', 119, "The constructor '%s' could not be found in '%s'");
+  static const CompileTimeErrorCode REDIRECT_TO_MISSING_CONSTRUCTOR = const CompileTimeErrorCode.con1('REDIRECT_TO_MISSING_CONSTRUCTOR', 119, "The constructor '%s' could not be found in '%s'");
 
   /**
    * 7.6.2 Factories: It is a compile-time error if <i>k</i> is prefixed with the const modifier but
    * <i>k'</i> is not a constant constructor.
    */
-  static final CompileTimeErrorCode REDIRECT_TO_NON_CLASS = new CompileTimeErrorCode.con1('REDIRECT_TO_NON_CLASS', 120, "The name '%s' is not a type and cannot be used in a redirected constructor");
+  static const CompileTimeErrorCode REDIRECT_TO_NON_CLASS = const CompileTimeErrorCode.con1('REDIRECT_TO_NON_CLASS', 120, "The name '%s' is not a type and cannot be used in a redirected constructor");
 
   /**
    * 7.6.2 Factories: It is a compile-time error if <i>k</i> is prefixed with the const modifier but
    * <i>k'</i> is not a constant constructor.
    */
-  static final CompileTimeErrorCode REDIRECT_TO_NON_CONST_CONSTRUCTOR = new CompileTimeErrorCode.con1('REDIRECT_TO_NON_CONST_CONSTRUCTOR', 121, "Constant factory constructor cannot delegate to a non-constant constructor");
+  static const CompileTimeErrorCode REDIRECT_TO_NON_CONST_CONSTRUCTOR = const CompileTimeErrorCode.con1('REDIRECT_TO_NON_CONST_CONSTRUCTOR', 121, "Constant factory constructor cannot delegate to a non-constant constructor");
 
   /**
    * 5 Variables: A local variable may only be referenced at a source code location that is after
    * its initializer, if any, is complete, or a compile-time error occurs.
    */
-  static final CompileTimeErrorCode REFERENCED_BEFORE_DECLARATION = new CompileTimeErrorCode.con1('REFERENCED_BEFORE_DECLARATION', 122, "Local variables cannot be referenced before they are declared");
+  static const CompileTimeErrorCode REFERENCED_BEFORE_DECLARATION = const CompileTimeErrorCode.con1('REFERENCED_BEFORE_DECLARATION', 122, "Local variables cannot be referenced before they are declared");
 
   /**
    * 12.8.1 Rethrow: It is a compile-time error if an expression of the form <i>rethrow;</i> is not
    * enclosed within a on-catch clause.
    */
-  static final CompileTimeErrorCode RETHROW_OUTSIDE_CATCH = new CompileTimeErrorCode.con1('RETHROW_OUTSIDE_CATCH', 123, "rethrow must be inside of a catch clause");
+  static const CompileTimeErrorCode RETHROW_OUTSIDE_CATCH = const CompileTimeErrorCode.con1('RETHROW_OUTSIDE_CATCH', 123, "rethrow must be inside of a catch clause");
 
   /**
    * 13.11 Return: It is a compile-time error if a return statement of the form <i>return e;</i>
    * appears in a generative constructor.
    */
-  static final CompileTimeErrorCode RETURN_IN_GENERATIVE_CONSTRUCTOR = new CompileTimeErrorCode.con1('RETURN_IN_GENERATIVE_CONSTRUCTOR', 124, "Constructors cannot return a value");
+  static const CompileTimeErrorCode RETURN_IN_GENERATIVE_CONSTRUCTOR = const CompileTimeErrorCode.con1('RETURN_IN_GENERATIVE_CONSTRUCTOR', 124, "Constructors cannot return a value");
 
   /**
    * 12.15.4 Super Invocation: A super method invocation <i>i</i> has the form
    * <i>super.m(a<sub>1</sub>, &hellip;, a<sub>n</sub>, x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;
    * x<sub>n+k</sub>: a<sub>n+k</sub>)</i>. It is a compile-time error if a super method invocation
    * occurs in a top-level function or variable initializer, in an instance variable initializer or
    * initializer list, in class Object, in a factory constructor, or in a static method or variable
    * initializer.
    */
-  static final CompileTimeErrorCode SUPER_IN_INVALID_CONTEXT = new CompileTimeErrorCode.con1('SUPER_IN_INVALID_CONTEXT', 125, "Invalid context for 'super' invocation");
+  static const CompileTimeErrorCode SUPER_IN_INVALID_CONTEXT = const CompileTimeErrorCode.con1('SUPER_IN_INVALID_CONTEXT', 125, "Invalid context for 'super' invocation");
 
   /**
    * 7.6.1 Generative Constructors: A generative constructor may be redirecting, in which case its
    * only action is to invoke another generative constructor.
    */
-  static final CompileTimeErrorCode SUPER_IN_REDIRECTING_CONSTRUCTOR = new CompileTimeErrorCode.con1('SUPER_IN_REDIRECTING_CONSTRUCTOR', 126, "The redirecting constructor cannot have a 'super' initializer");
+  static const CompileTimeErrorCode SUPER_IN_REDIRECTING_CONSTRUCTOR = const CompileTimeErrorCode.con1('SUPER_IN_REDIRECTING_CONSTRUCTOR', 126, "The redirecting constructor cannot have a 'super' initializer");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>k</i> be a generative constructor. It is a compile-time
    * error if a generative constructor of class Object includes a superinitializer.
    */
-  static final CompileTimeErrorCode SUPER_INITIALIZER_IN_OBJECT = new CompileTimeErrorCode.con1('SUPER_INITIALIZER_IN_OBJECT', 127, "");
+  static const CompileTimeErrorCode SUPER_INITIALIZER_IN_OBJECT = const CompileTimeErrorCode.con1('SUPER_INITIALIZER_IN_OBJECT', 127, "");
 
   /**
    * 12.11 Instance Creation: It is a static type warning if any of the type arguments to a
    * constructor of a generic type <i>G</i> invoked by a new expression or a constant object
    * expression are not subtypes of the bounds of the corresponding formal type parameters of
    * <i>G</i>.
    *
    * 12.11.1 New: If T is malformed a dynamic error occurs. In checked mode, if T is mal-bounded a
    * dynamic error occurs.
    *
    * 12.1 Constants: It is a compile-time error if evaluation of a compile-time constant would raise
    * an exception.
    *
    * @param boundedTypeName the name of the type used in the instance creation that should be
    *          limited by the bound as specified in the class declaration
    * @param boundingTypeName the name of the bounding type
    * @see StaticTypeWarningCode#TYPE_ARGUMENT_NOT_MATCHING_BOUNDS
    */
-  static final CompileTimeErrorCode TYPE_ARGUMENT_NOT_MATCHING_BOUNDS = new CompileTimeErrorCode.con1('TYPE_ARGUMENT_NOT_MATCHING_BOUNDS', 128, "'%s' does not extend '%s'");
+  static const CompileTimeErrorCode TYPE_ARGUMENT_NOT_MATCHING_BOUNDS = const CompileTimeErrorCode.con1('TYPE_ARGUMENT_NOT_MATCHING_BOUNDS', 128, "'%s' does not extend '%s'");
 
   /**
    * 15.3.1 Typedef: Any self reference, either directly, or recursively via another typedef, is a
    * compile time error.
    */
-  static final CompileTimeErrorCode TYPE_ALIAS_CANNOT_REFERENCE_ITSELF = new CompileTimeErrorCode.con1('TYPE_ALIAS_CANNOT_REFERENCE_ITSELF', 129, "Type alias cannot reference itself directly or recursively via another typedef");
+  static const CompileTimeErrorCode TYPE_ALIAS_CANNOT_REFERENCE_ITSELF = const CompileTimeErrorCode.con1('TYPE_ALIAS_CANNOT_REFERENCE_ITSELF', 129, "Type alias cannot reference itself directly or recursively via another typedef");
 
   /**
    * 12.11.2 Const: It is a compile-time error if <i>T</i> is not a class accessible in the current
    * scope, optionally followed by type arguments.
    */
-  static final CompileTimeErrorCode UNDEFINED_CLASS = new CompileTimeErrorCode.con1('UNDEFINED_CLASS', 130, "Undefined class '%s'");
+  static const CompileTimeErrorCode UNDEFINED_CLASS = const CompileTimeErrorCode.con1('UNDEFINED_CLASS', 130, "Undefined class '%s'");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>C</i> be the class in which the superinitializer appears
    * and let <i>S</i> be the superclass of <i>C</i>. Let <i>k</i> be a generative constructor. It is
    * a compile-time error if class <i>S</i> does not declare a generative constructor named <i>S</i>
    * (respectively <i>S.id</i>)
    */
-  static final CompileTimeErrorCode UNDEFINED_CONSTRUCTOR_IN_INITIALIZER = new CompileTimeErrorCode.con1('UNDEFINED_CONSTRUCTOR_IN_INITIALIZER', 131, "The class '%s' does not have a generative constructor '%s'");
+  static const CompileTimeErrorCode UNDEFINED_CONSTRUCTOR_IN_INITIALIZER = const CompileTimeErrorCode.con1('UNDEFINED_CONSTRUCTOR_IN_INITIALIZER', 131, "The class '%s' does not have a generative constructor '%s'");
 
   /**
    * 7.6.1 Generative Constructors: Let <i>C</i> be the class in which the superinitializer appears
    * and let <i>S</i> be the superclass of <i>C</i>. Let <i>k</i> be a generative constructor. It is
    * a compile-time error if class <i>S</i> does not declare a generative constructor named <i>S</i>
    * (respectively <i>S.id</i>)
    */
-  static final CompileTimeErrorCode UNDEFINED_CONSTRUCTOR_IN_INITIALIZER_DEFAULT = new CompileTimeErrorCode.con1('UNDEFINED_CONSTRUCTOR_IN_INITIALIZER_DEFAULT', 132, "The class '%s' does not have a default generative constructor");
+  static const CompileTimeErrorCode UNDEFINED_CONSTRUCTOR_IN_INITIALIZER_DEFAULT = const CompileTimeErrorCode.con1('UNDEFINED_CONSTRUCTOR_IN_INITIALIZER_DEFAULT', 132, "The class '%s' does not have a default generative constructor");
 
   /**
    * 12.14.3 Unqualified Invocation: If there exists a lexically visible declaration named
    * <i>id</i>, let <i>f<sub>id</sub></i> be the innermost such declaration. Then: [skip].
    * Otherwise, <i>i</i> is equivalent to <b>this</b>.<i>id</i>(<i>a<sub>1</sub></i>; ...
    * <i>x<sub>n+k</sub></i> : <i>a<sub>n+k</sub></i>).
    *
    * @param methodName the name of the method that is undefined
    */
-  static final CompileTimeErrorCode UNDEFINED_FUNCTION = new CompileTimeErrorCode.con1('UNDEFINED_FUNCTION', 133, "The function '%s' is not defined");
+  static const CompileTimeErrorCode UNDEFINED_FUNCTION = const CompileTimeErrorCode.con1('UNDEFINED_FUNCTION', 133, "The function '%s' is not defined");
 
   /**
    * 12.14.2 Binding Actuals to Formals: Furthermore, each <i>q<sub>i</sub></i>, <i>1<=i<=l</i>,
    * must have a corresponding named parameter in the set {<i>p<sub>n+1</sub></i> ...
    * <i>p<sub>n+k</sub></i>} or a static warning occurs.
    *
    * 12.11.2 Const: It is a compile-time error if evaluation of a constant object results in an
    * uncaught exception being thrown.
    *
    * @param name the name of the requested named parameter
    */
-  static final CompileTimeErrorCode UNDEFINED_NAMED_PARAMETER = new CompileTimeErrorCode.con1('UNDEFINED_NAMED_PARAMETER', 134, "The named parameter '%s' is not defined");
+  static const CompileTimeErrorCode UNDEFINED_NAMED_PARAMETER = const CompileTimeErrorCode.con1('UNDEFINED_NAMED_PARAMETER', 134, "The named parameter '%s' is not defined");
 
   /**
    * 14.2 Exports: It is a compile-time error if the compilation unit found at the specified URI is
    * not a library declaration.
    *
    * 14.1 Imports: It is a compile-time error if the compilation unit found at the specified URI is
    * not a library declaration.
    *
    * 14.3 Parts: It is a compile time error if the contents of the URI are not a valid part
    * declaration.
    *
    * @param uri the URI pointing to a non-existent file
    * @see #INVALID_URI
    */
-  static final CompileTimeErrorCode URI_DOES_NOT_EXIST = new CompileTimeErrorCode.con1('URI_DOES_NOT_EXIST', 135, "Target of URI does not exist: '%s'");
+  static const CompileTimeErrorCode URI_DOES_NOT_EXIST = const CompileTimeErrorCode.con1('URI_DOES_NOT_EXIST', 135, "Target of URI does not exist: '%s'");
 
   /**
    * 14.1 Imports: It is a compile-time error if <i>x</i> is not a compile-time constant, or if
    * <i>x</i> involves string interpolation.
    *
    * 14.3 Parts: It is a compile-time error if <i>s</i> is not a compile-time constant, or if
    * <i>s</i> involves string interpolation.
    *
    * 14.5 URIs: It is a compile-time error if the string literal <i>x</i> that describes a URI is
    * not a compile-time constant, or if <i>x</i> involves string interpolation.
    */
-  static final CompileTimeErrorCode URI_WITH_INTERPOLATION = new CompileTimeErrorCode.con1('URI_WITH_INTERPOLATION', 136, "URIs cannot use string interpolation");
+  static const CompileTimeErrorCode URI_WITH_INTERPOLATION = const CompileTimeErrorCode.con1('URI_WITH_INTERPOLATION', 136, "URIs cannot use string interpolation");
 
   /**
    * 7.1.1 Operators: It is a compile-time error if the arity of the user-declared operator []= is
    * not 2. It is a compile time error if the arity of a user-declared operator with one of the
    * names: &lt;, &gt;, &lt;=, &gt;=, ==, +, /, ~/, *, %, |, ^, &, &lt;&lt;, &gt;&gt;, [] is not 1.
    * It is a compile time error if the arity of the user-declared operator - is not 0 or 1. It is a
    * compile time error if the arity of the user-declared operator ~ is not 0.
    *
    * @param operatorName the name of the declared operator
    * @param expectedNumberOfParameters the number of parameters expected
    * @param actualNumberOfParameters the number of parameters found in the operator declaration
    */
-  static final CompileTimeErrorCode WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR = new CompileTimeErrorCode.con1('WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR', 137, "Operator '%s' should declare exactly %d parameter(s), but %d found");
+  static const CompileTimeErrorCode WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR = const CompileTimeErrorCode.con1('WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR', 137, "Operator '%s' should declare exactly %d parameter(s), but %d found");
 
   /**
    * 7.1.1 Operators: It is a compile time error if the arity of the user-declared operator - is not
    * 0 or 1.
    *
    * @param actualNumberOfParameters the number of parameters found in the operator declaration
    */
-  static final CompileTimeErrorCode WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR_MINUS = new CompileTimeErrorCode.con1('WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR_MINUS', 138, "Operator '-' should declare 0 or 1 parameter, but %d found");
+  static const CompileTimeErrorCode WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR_MINUS = const CompileTimeErrorCode.con1('WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR_MINUS', 138, "Operator '-' should declare 0 or 1 parameter, but %d found");
 
   /**
    * 7.3 Setters: It is a compile-time error if a setter's formal parameter list does not include
    * exactly one required formal parameter <i>p</i>.
    */
-  static final CompileTimeErrorCode WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER = new CompileTimeErrorCode.con1('WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER', 139, "Setters should declare exactly one required parameter");
+  static const CompileTimeErrorCode WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER = const CompileTimeErrorCode.con1('WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER', 139, "Setters should declare exactly one required parameter");
 
-  static final List<CompileTimeErrorCode> values = [
+  static const List<CompileTimeErrorCode> values = const [
       AMBIGUOUS_EXPORT,
       ARGUMENT_DEFINITION_TEST_NON_PARAMETER,
       BUILT_IN_IDENTIFIER_AS_TYPE,
       BUILT_IN_IDENTIFIER_AS_TYPE_NAME,
       BUILT_IN_IDENTIFIER_AS_TYPEDEF_NAME,
       BUILT_IN_IDENTIFIER_AS_TYPE_PARAMETER_NAME,
       CASE_EXPRESSION_TYPE_IMPLEMENTS_EQUALS,
       COMPILE_TIME_CONSTANT_RAISES_EXCEPTION,
       CONFLICTING_GETTER_AND_METHOD,
       CONFLICTING_METHOD_AND_GETTER,
@@ skipping 124 matching lines @@
       UNDEFINED_NAMED_PARAMETER,
       URI_DOES_NOT_EXIST,
       URI_WITH_INTERPOLATION,
       WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR,
       WRONG_NUMBER_OF_PARAMETERS_FOR_OPERATOR_MINUS,
       WRONG_NUMBER_OF_PARAMETERS_FOR_SETTER];
 
   /**
    * The template used to create the message to be displayed for this error.
    */
-  String message;
+  final String message;
 
   /**
    * The template used to create the correction to be displayed for this error, or `null` if
    * there is no correction information for this error.
    */
-  String correction2;
+  final String correction;
 
   /**
    * Initialize a newly created error code to have the given message.
    *
    * @param message the message template used to create the message to be displayed for the error
    */
-  CompileTimeErrorCode.con1(String name, int ordinal, String message) : super(name, ordinal) {
-    this.message = message;
-  }
+  const CompileTimeErrorCode.con1(String name, int ordinal, String message) : this.con2(name, ordinal, message, null);
 
   /**
    * Initialize a newly created error code to have the given message and correction.
    *
    * @param message the template used to create the message to be displayed for the error
    * @param correction the template used to create the correction to be displayed for the error
    */
-  CompileTimeErrorCode.con2(String name, int ordinal, String message, String correction) : super(name, ordinal) {
-    this.message = message;
-    this.correction2 = correction;
-  }
-
-  @override
-  String get correction => correction2;
+  const CompileTimeErrorCode.con2(String name, int ordinal, this.message, this.correction) : super(name, ordinal);
 
   @override
   ErrorSeverity get errorSeverity => ErrorType.COMPILE_TIME_ERROR.severity;
 
   @override
   ErrorType get type => ErrorType.COMPILE_TIME_ERROR;
 }
 
 /**
  * The enumeration `PubSuggestionCode` defines the suggestions used for reporting deviations
  * from pub best practices. The convention for this class is for the name of the bad practice to
  * indicate the problem that caused the suggestion to be generated and for the message to explain
  * what is wrong and, when appropriate, how the situation can be corrected.
  */
 class PubSuggestionCode extends Enum<PubSuggestionCode> implements ErrorCode {
   /**
    * It is a bad practice for a source file in a package "lib" directory hierarchy to traverse
    * outside that directory hierarchy. For example, a source file in the "lib" directory should not
    * contain a directive such as `import '../web/some.dart'` which references a file outside
    * the lib directory.
    */
-  static final PubSuggestionCode FILE_IMPORT_INSIDE_LIB_REFERENCES_FILE_OUTSIDE = new PubSuggestionCode.con1('FILE_IMPORT_INSIDE_LIB_REFERENCES_FILE_OUTSIDE', 0, "A file in the 'lib' directory hierarchy should not reference a file outside that hierarchy");
+  static const PubSuggestionCode FILE_IMPORT_INSIDE_LIB_REFERENCES_FILE_OUTSIDE = const PubSuggestionCode.con1('FILE_IMPORT_INSIDE_LIB_REFERENCES_FILE_OUTSIDE', 0, "A file in the 'lib' directory hierarchy should not reference a file outside that hierarchy");
 
   /**
    * It is a bad practice for a source file ouside a package "lib" directory hierarchy to traverse
    * into that directory hierarchy. For example, a source file in the "web" directory should not
    * contain a directive such as `import '../lib/some.dart'` which references a file inside
    * the lib directory.
    */
-  static final PubSuggestionCode FILE_IMPORT_OUTSIDE_LIB_REFERENCES_FILE_INSIDE = new PubSuggestionCode.con1('FILE_IMPORT_OUTSIDE_LIB_REFERENCES_FILE_INSIDE', 1, "A file outside the 'lib' directory hierarchy should not reference a file inside that hierarchy. Use a package: reference instead.");
+  static const PubSuggestionCode FILE_IMPORT_OUTSIDE_LIB_REFERENCES_FILE_INSIDE = const PubSuggestionCode.con1('FILE_IMPORT_OUTSIDE_LIB_REFERENCES_FILE_INSIDE', 1, "A file outside the 'lib' directory hierarchy should not reference a file inside that hierarchy. Use a package: reference instead.");
 
   /**
    * It is a bad practice for a package import to reference anything outside the given package, or
    * more generally, it is bad practice for a package import to contain a "..". For example, a
    * source file should not contain a directive such as `import 'package:foo/../some.dart'`.
    */
-  static final PubSuggestionCode PACKAGE_IMPORT_CONTAINS_DOT_DOT = new PubSuggestionCode.con1('PACKAGE_IMPORT_CONTAINS_DOT_DOT', 2, "A package import should not contain '..'");
+  static const PubSuggestionCode PACKAGE_IMPORT_CONTAINS_DOT_DOT = const PubSuggestionCode.con1('PACKAGE_IMPORT_CONTAINS_DOT_DOT', 2, "A package import should not contain '..'");
 
-  static final List<PubSuggestionCode> values = [
+  static const List<PubSuggestionCode> values = const [
       FILE_IMPORT_INSIDE_LIB_REFERENCES_FILE_OUTSIDE,
       FILE_IMPORT_OUTSIDE_LIB_REFERENCES_FILE_INSIDE,
       PACKAGE_IMPORT_CONTAINS_DOT_DOT];
 
   /**
    * The template used to create the message to be displayed for this error.
    */
-  String message;
+  final String message;
 
   /**
    * The template used to create the correction to be displayed for this error, or `null` if
    * there is no correction information for this error.
    */
-  String correction5;
+  final String correction;
 
   /**
    * Initialize a newly created error code to have the given message.
    *
    * @param message the message template used to create the message to be displayed for the error
    */
-  PubSuggestionCode.con1(String name, int ordinal, String message) : super(name, ordinal) {
-    this.message = message;
-  }
+  const PubSuggestionCode.con1(String name, int ordinal, String message) : this.con2(name, ordinal, message, null);
 
   /**
    * Initialize a newly created error code to have the given message and correction.
    *
    * @param message the template used to create the message to be displayed for the error
    * @param correction the template used to create the correction to be displayed for the error
    */
-  PubSuggestionCode.con2(String name, int ordinal, String message, String correction) : super(name, ordinal) {
-    this.message = message;
-    this.correction5 = correction;
-  }
-
-  @override
-  String get correction => correction5;
+  const PubSuggestionCode.con2(String name, int ordinal, this.message, this.correction) : super(name, ordinal);
 
   @override
   ErrorSeverity get errorSeverity => ErrorType.PUB_SUGGESTION.severity;
 
   @override
   ErrorType get type => ErrorType.PUB_SUGGESTION;
 }
 
 /**
  * The enumeration `StaticWarningCode` defines the error codes used for static warnings. The
  * convention for this class is for the name of the error code to indicate the problem that caused
  * the error to be generated and for the error message to explain what is wrong and, when
  * appropriate, how the problem can be corrected.
  */
 class StaticWarningCode extends Enum<StaticWarningCode> implements ErrorCode {
   /**
    * 14.1 Imports: If a name <i>N</i> is referenced by a library <i>L</i> and <i>N</i> is introduced
    * into the top level scope <i>L</i> by more than one import then:
    * <ol>
    * * A static warning occurs.
    * * If <i>N</i> is referenced as a function, getter or setter, a <i>NoSuchMethodError</i> is
    * raised.
    * * If <i>N</i> is referenced as a type, it is treated as a malformed type.
    * </ol>
    *
    * @param ambiguousTypeName the name of the ambiguous type
    * @param firstLibraryName the name of the first library that the type is found
    * @param secondLibraryName the name of the second library that the type is found
    */
-  static final StaticWarningCode AMBIGUOUS_IMPORT = new StaticWarningCode.con1('AMBIGUOUS_IMPORT', 0, "The type '%s' is defined in the libraries '%s' and '%s'");
+  static const StaticWarningCode AMBIGUOUS_IMPORT = const StaticWarningCode.con1('AMBIGUOUS_IMPORT', 0, "The type '%s' is defined in the libraries '%s' and '%s'");
 
   /**
    * 12.11.1 New: It is a static warning if the static type of <i>a<sub>i</sub>, 1 &lt;= i &lt;= n+
    * k</i> may not be assigned to the type of the corresponding formal parameter of the constructor
    * <i>T.id</i> (respectively <i>T</i>).
    *
    * 12.11.2 Const: It is a static warning if the static type of <i>a<sub>i</sub>, 1 &lt;= i &lt;=
    * n+ k</i> may not be assigned to the type of the corresponding formal parameter of the
    * constructor <i>T.id</i> (respectively <i>T</i>).
    *
    * 12.14.2 Binding Actuals to Formals: Let <i>T<sub>i</sub></i> be the static type of
    * <i>a<sub>i</sub></i>, let <i>S<sub>i</sub></i> be the type of <i>p<sub>i</sub>, 1 &lt;= i &lt;=
    * n+k</i> and let <i>S<sub>q</sub></i> be the type of the named parameter <i>q</i> of <i>f</i>.
    * It is a static warning if <i>T<sub>j</sub></i> may not be assigned to <i>S<sub>j</sub>, 1 &lt;=
    * j &lt;= m</i>.
    *
    * 12.14.2 Binding Actuals to Formals: Furthermore, each <i>q<sub>i</sub>, 1 &lt;= i &lt;= l</i>,
    * must have a corresponding named parameter in the set <i>{p<sub>n+1</sub>, &hellip;
    * p<sub>n+k</sub>}</i> or a static warning occurs. It is a static warning if
    * <i>T<sub>m+j</sub></i> may not be assigned to <i>S<sub>r</sub></i>, where <i>r = q<sub>j</sub>,
    * 1 &lt;= j &lt;= l</i>.
    *
    * @param actualType the name of the actual argument type
    * @param expectedType the name of the expected type
    */
-  static final StaticWarningCode ARGUMENT_TYPE_NOT_ASSIGNABLE = new StaticWarningCode.con1('ARGUMENT_TYPE_NOT_ASSIGNABLE', 1, "The argument type '%s' cannot be assigned to the parameter type '%s'");
+  static const StaticWarningCode ARGUMENT_TYPE_NOT_ASSIGNABLE = const StaticWarningCode.con1('ARGUMENT_TYPE_NOT_ASSIGNABLE', 1, "The argument type '%s' cannot be assigned to the parameter type '%s'");
 
   /**
    * 5 Variables: Attempting to assign to a final variable elsewhere will cause a NoSuchMethodError
    * to be thrown, because no setter is defined for it. The assignment will also give rise to a
    * static warning for the same reason.
    *
    * A constant variable is always implicitly final.
    */
-  static final StaticWarningCode ASSIGNMENT_TO_CONST = new StaticWarningCode.con1('ASSIGNMENT_TO_CONST', 2, "Constant variables cannot be assigned a value");
+  static const StaticWarningCode ASSIGNMENT_TO_CONST = const StaticWarningCode.con1('ASSIGNMENT_TO_CONST', 2, "Constant variables cannot be assigned a value");
 
   /**
    * 5 Variables: Attempting to assign to a final variable elsewhere will cause a NoSuchMethodError
    * to be thrown, because no setter is defined for it. The assignment will also give rise to a
    * static warning for the same reason.
    */
-  static final StaticWarningCode ASSIGNMENT_TO_FINAL = new StaticWarningCode.con1('ASSIGNMENT_TO_FINAL', 3, "'%s' cannot be used as a setter, it is final");
+  static const StaticWarningCode ASSIGNMENT_TO_FINAL = const StaticWarningCode.con1('ASSIGNMENT_TO_FINAL', 3, "'%s' cannot be used as a setter, it is final");
 
   /**
    * 12.18 Assignment: Let <i>T</i> be the static type of <i>e<sub>1</sub></i>. It is a static type
    * warning if <i>T</i> does not have an accessible instance setter named <i>v =</i>.
    */
-  static final StaticWarningCode ASSIGNMENT_TO_METHOD = new StaticWarningCode.con1('ASSIGNMENT_TO_METHOD', 4, "Methods cannot be assigned a value");
+  static const StaticWarningCode ASSIGNMENT_TO_METHOD = const StaticWarningCode.con1('ASSIGNMENT_TO_METHOD', 4, "Methods cannot be assigned a value");
 
   /**
    * 13.9 Switch: It is a static warning if the last statement of the statement sequence
    * <i>s<sub>k</sub></i> is not a break, continue, return or throw statement.
    */
-  static final StaticWarningCode CASE_BLOCK_NOT_TERMINATED = new StaticWarningCode.con1('CASE_BLOCK_NOT_TERMINATED', 5, "The last statement of the 'case' should be 'break', 'continue', 'return' or 'throw'");
+  static const StaticWarningCode CASE_BLOCK_NOT_TERMINATED = const StaticWarningCode.con1('CASE_BLOCK_NOT_TERMINATED', 5, "The last statement of the 'case' should be 'break', 'continue', 'return' or 'throw'");
 
   /**
    * 12.32 Type Cast: It is a static warning if <i>T</i> does not denote a type available in the
    * current lexical scope.
    */
-  static final StaticWarningCode CAST_TO_NON_TYPE = new StaticWarningCode.con1('CAST_TO_NON_TYPE', 6, "The name '%s' is not a type and cannot be used in an 'as' expression");
+  static const StaticWarningCode CAST_TO_NON_TYPE = const StaticWarningCode.con1('CAST_TO_NON_TYPE', 6, "The name '%s' is not a type and cannot be used in an 'as' expression");
 
   /**
    * 7.4 Abstract Instance Members: It is a static warning if an abstract member is declared or
    * inherited in a concrete class.
    */
-  static final StaticWarningCode CONCRETE_CLASS_WITH_ABSTRACT_MEMBER = new StaticWarningCode.con1('CONCRETE_CLASS_WITH_ABSTRACT_MEMBER', 7, "'%s' must have a method body because '%s' is not abstract");
+  static const StaticWarningCode CONCRETE_CLASS_WITH_ABSTRACT_MEMBER = const StaticWarningCode.con1('CONCRETE_CLASS_WITH_ABSTRACT_MEMBER', 7, "'%s' must have a method body because '%s' is not abstract");
 
   /**
    * 14.1 Imports: If a name <i>N</i> is referenced by a library <i>L</i> and <i>N</i> would be
    * introduced into the top level scope of <i>L</i> by an import from a library whose URI begins
    * with <i>dart:</i> and an import from a library whose URI does not begin with <i>dart:</i>:
    * * The import from <i>dart:</i> is implicitly extended by a hide N clause.
    * * A static warning is issued.
    *
    * @param ambiguousName the ambiguous name
    * @param sdkLibraryName the name of the dart: library that the element is found
    * @param otherLibraryName the name of the non-dart: library that the element is found
    */
-  static final StaticWarningCode CONFLICTING_DART_IMPORT = new StaticWarningCode.con1('CONFLICTING_DART_IMPORT', 8, "Element '%s' from SDK library '%s' is implicitly hidden by '%s'");
+  static const StaticWarningCode CONFLICTING_DART_IMPORT = const StaticWarningCode.con1('CONFLICTING_DART_IMPORT', 8, "Element '%s' from SDK library '%s' is implicitly hidden by '%s'");
 
   /**
    * 7.2 Getters: It is a static warning if a class <i>C</i> declares an instance getter named
    * <i>v</i> and an accessible static member named <i>v</i> or <i>v=</i> is declared in a
    * superclass of <i>C</i>.
    *
    * @param superName the name of the super class declaring a static member
    */
-  static final StaticWarningCode CONFLICTING_INSTANCE_GETTER_AND_SUPERCLASS_MEMBER = new StaticWarningCode.con1('CONFLICTING_INSTANCE_GETTER_AND_SUPERCLASS_MEMBER', 9, "Superclass '%s' declares static member with the same name");
+  static const StaticWarningCode CONFLICTING_INSTANCE_GETTER_AND_SUPERCLASS_MEMBER = const StaticWarningCode.con1('CONFLICTING_INSTANCE_GETTER_AND_SUPERCLASS_MEMBER', 9, "Superclass '%s' declares static member with the same name");
 
   /**
    * 7.1 Instance Methods: It is a static warning if a class <i>C</i> declares an instance method
    * named <i>n</i> and has a setter named <i>n=</i>.
    */
-  static final StaticWarningCode CONFLICTING_INSTANCE_METHOD_SETTER = new StaticWarningCode.con1('CONFLICTING_INSTANCE_METHOD_SETTER', 10, "Class '%s' declares instance method '%s', but also has a setter with the same name from '%s'");
+  static const StaticWarningCode CONFLICTING_INSTANCE_METHOD_SETTER = const StaticWarningCode.con1('CONFLICTING_INSTANCE_METHOD_SETTER', 10, "Class '%s' declares instance method '%s', but also has a setter with the same name from '%s'");
 
   /**
    * 7.1 Instance Methods: It is a static warning if a class <i>C</i> declares an instance method
    * named <i>n</i> and has a setter named <i>n=</i>.
    */
-  static final StaticWarningCode CONFLICTING_INSTANCE_METHOD_SETTER2 = new StaticWarningCode.con1('CONFLICTING_INSTANCE_METHOD_SETTER2', 11, "Class '%s' declares the setter '%s', but also has an instance method in the same class");
+  static const StaticWarningCode CONFLICTING_INSTANCE_METHOD_SETTER2 = const StaticWarningCode.con1('CONFLICTING_INSTANCE_METHOD_SETTER2', 11, "Class '%s' declares the setter '%s', but also has an instance method in the same class");
 
   /**
    * 7.3 Setters: It is a static warning if a class <i>C</i> declares an instance setter named
    * <i>v=</i> and an accessible static member named <i>v=</i> or <i>v</i> is declared in a
    * superclass of <i>C</i>.
    *
    * @param superName the name of the super class declaring a static member
    */
-  static final StaticWarningCode CONFLICTING_INSTANCE_SETTER_AND_SUPERCLASS_MEMBER = new StaticWarningCode.con1('CONFLICTING_INSTANCE_SETTER_AND_SUPERCLASS_MEMBER', 12, "Superclass '%s' declares static member with the same name");
+  static const StaticWarningCode CONFLICTING_INSTANCE_SETTER_AND_SUPERCLASS_MEMBER = const StaticWarningCode.con1('CONFLICTING_INSTANCE_SETTER_AND_SUPERCLASS_MEMBER', 12, "Superclass '%s' declares static member with the same name");
 
   /**
    * 7.2 Getters: It is a static warning if a class declares a static getter named <i>v</i> and also
    * has a non-static setter named <i>v=</i>.
    */
-  static final StaticWarningCode CONFLICTING_STATIC_GETTER_AND_INSTANCE_SETTER = new StaticWarningCode.con1('CONFLICTING_STATIC_GETTER_AND_INSTANCE_SETTER', 13, "Class '%s' declares non-static setter with the same name");
+  static const StaticWarningCode CONFLICTING_STATIC_GETTER_AND_INSTANCE_SETTER = const StaticWarningCode.con1('CONFLICTING_STATIC_GETTER_AND_INSTANCE_SETTER', 13, "Class '%s' declares non-static setter with the same name");
 
   /**
    * 7.3 Setters: It is a static warning if a class declares a static setter named <i>v=</i> and
    * also has a non-static member named <i>v</i>.
    */
-  static final StaticWarningCode CONFLICTING_STATIC_SETTER_AND_INSTANCE_MEMBER = new StaticWarningCode.con1('CONFLICTING_STATIC_SETTER_AND_INSTANCE_MEMBER', 14, "Class '%s' declares non-static member with the same name");
+  static const StaticWarningCode CONFLICTING_STATIC_SETTER_AND_INSTANCE_MEMBER = const StaticWarningCode.con1('CONFLICTING_STATIC_SETTER_AND_INSTANCE_MEMBER', 14, "Class '%s' declares non-static member with the same name");
 
   /**
    * 12.11.2 Const: Given an instance creation expression of the form <i>const q(a<sub>1</sub>,
    * &hellip; a<sub>n</sub>)</i> it is a static warning if <i>q</i> is the constructor of an
    * abstract class but <i>q</i> is not a factory constructor.
    */
-  static final StaticWarningCode CONST_WITH_ABSTRACT_CLASS = new StaticWarningCode.con1('CONST_WITH_ABSTRACT_CLASS', 15, "Abstract classes cannot be created with a 'const' expression");
+  static const StaticWarningCode CONST_WITH_ABSTRACT_CLASS = const StaticWarningCode.con1('CONST_WITH_ABSTRACT_CLASS', 15, "Abstract classes cannot be created with a 'const' expression");
 
   /**
    * 12.7 Maps: It is a static warning if the values of any two keys in a map literal are equal.
    */
-  static final StaticWarningCode EQUAL_KEYS_IN_MAP = new StaticWarningCode.con1('EQUAL_KEYS_IN_MAP', 16, "Keys in a map cannot be equal");
+  static const StaticWarningCode EQUAL_KEYS_IN_MAP = const StaticWarningCode.con1('EQUAL_KEYS_IN_MAP', 16, "Keys in a map cannot be equal");
 
   /**
    * 14.2 Exports: It is a static warning to export two different libraries with the same name.
    *
    * @param uri1 the uri pointing to a first library
    * @param uri2 the uri pointing to a second library
    * @param name the shared name of the exported libraries
    */
-  static final StaticWarningCode EXPORT_DUPLICATED_LIBRARY_NAME = new StaticWarningCode.con1('EXPORT_DUPLICATED_LIBRARY_NAME', 17, "The exported libraries '%s' and '%s' should not have the same name '%s'");
+  static const StaticWarningCode EXPORT_DUPLICATED_LIBRARY_NAME = const StaticWarningCode.con1('EXPORT_DUPLICATED_LIBRARY_NAME', 17, "The exported libraries '%s' and '%s' should not have the same name '%s'");
 
   /**
    * 12.14.2 Binding Actuals to Formals: It is a static warning if <i>m &lt; h</i> or if <i>m &gt;
    * n</i>.
    *
    * @param requiredCount the maximum number of positional arguments
    * @param argumentCount the actual number of positional arguments given
    * @see #NOT_ENOUGH_REQUIRED_ARGUMENTS
    */
-  static final StaticWarningCode EXTRA_POSITIONAL_ARGUMENTS = new StaticWarningCode.con1('EXTRA_POSITIONAL_ARGUMENTS', 18, "%d positional arguments expected, but %d found");
+  static const StaticWarningCode EXTRA_POSITIONAL_ARGUMENTS = const StaticWarningCode.con1('EXTRA_POSITIONAL_ARGUMENTS', 18, "%d positional arguments expected, but %d found");
 
   /**
    * 5. Variables: It is a static warning if a final instance variable that has been initialized at
    * its point of declaration is also initialized in a constructor.
    */
-  static final StaticWarningCode FIELD_INITIALIZED_IN_INITIALIZER_AND_DECLARATION = new StaticWarningCode.con1('FIELD_INITIALIZED_IN_INITIALIZER_AND_DECLARATION', 19, "Values cannot be set in the constructor if they are final, and have already been set");
+  static const StaticWarningCode FIELD_INITIALIZED_IN_INITIALIZER_AND_DECLARATION = const StaticWarningCode.con1('FIELD_INITIALIZED_IN_INITIALIZER_AND_DECLARATION', 19, "Values cannot be set in the constructor if they are final, and have already been set");
 
   /**
    * 5. Variables: It is a static warning if a final instance variable that has been initialized at
    * its point of declaration is also initialized in a constructor.
    *
    * @param name the name of the field in question
    */
-  static final StaticWarningCode FINAL_INITIALIZED_IN_DECLARATION_AND_CONSTRUCTOR = new StaticWarningCode.con1('FINAL_INITIALIZED_IN_DECLARATION_AND_CONSTRUCTOR', 20, "'%s' is final and was given a value when it was declared, so it cannot be set to a new value");
+  static const StaticWarningCode FINAL_INITIALIZED_IN_DECLARATION_AND_CONSTRUCTOR = const StaticWarningCode.con1('FINAL_INITIALIZED_IN_DECLARATION_AND_CONSTRUCTOR', 20, "'%s' is final and was given a value when it was declared, so it cannot be set to a new value");
 
   /**
    * 7.6.1 Generative Constructors: Execution of an initializer of the form <b>this</b>.<i>v</i> =
    * <i>e</i> proceeds as follows: First, the expression <i>e</i> is evaluated to an object
    * <i>o</i>. Then, the instance variable <i>v</i> of the object denoted by this is bound to
    * <i>o</i>.
    *
    * 12.14.2 Binding Actuals to Formals: Let <i>T<sub>i</sub></i> be the static type of
    * <i>a<sub>i</sub></i>, let <i>S<sub>i</sub></i> be the type of <i>p<sub>i</sub>, 1 &lt;= i &lt;=
    * n+k</i> and let <i>S<sub>q</sub></i> be the type of the named parameter <i>q</i> of <i>f</i>.
    * It is a static warning if <i>T<sub>j</sub></i> may not be assigned to <i>S<sub>j</sub>, 1 &lt;=
    * j &lt;= m</i>.
    *
    * @param initializerType the name of the type of the initializer expression
    * @param fieldType the name of the type of the field
    */
-  static final StaticWarningCode FIELD_INITIALIZER_NOT_ASSIGNABLE = new StaticWarningCode.con1('FIELD_INITIALIZER_NOT_ASSIGNABLE', 21, "The initializer type '%s' cannot be assigned to the field type '%s'");
+  static const StaticWarningCode FIELD_INITIALIZER_NOT_ASSIGNABLE = const StaticWarningCode.con1('FIELD_INITIALIZER_NOT_ASSIGNABLE', 21, "The initializer type '%s' cannot be assigned to the field type '%s'");
 
   /**
    * 7.6.1 Generative Constructors: An initializing formal has the form <i>this.id</i>. It is a
    * static warning if the static type of <i>id</i> is not assignable to <i>T<sub>id</sub></i>.
    *
    * @param parameterType the name of the type of the field formal parameter
    * @param fieldType the name of the type of the field
    */
-  static final StaticWarningCode FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE = new StaticWarningCode.con1('FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE', 22, "The parameter type '%s' is incompatable with the field type '%s'");
+  static const StaticWarningCode FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE = const StaticWarningCode.con1('FIELD_INITIALIZING_FORMAL_NOT_ASSIGNABLE', 22, "The parameter type '%s' is incompatable with the field type '%s'");
 
   /**
    * 5 Variables: It is a static warning if a library, static or local variable <i>v</i> is final
    * and <i>v</i> is not initialized at its point of declaration.
    *
    * 7.6.1 Generative Constructors: Each final instance variable <i>f</i> declared in the
    * immediately enclosing class must have an initializer in <i>k</i>'s initializer list unless it
    * has already been initialized by one of the following means:
    * * Initialization at the declaration of <i>f</i>.
    * * Initialization by means of an initializing formal of <i>k</i>.
    * or a static warning occurs.
    *
    * @param name the name of the uninitialized final variable
    */
-  static final StaticWarningCode FINAL_NOT_INITIALIZED = new StaticWarningCode.con1('FINAL_NOT_INITIALIZED', 23, "The final variable '%s' must be initialized");
+  static const StaticWarningCode FINAL_NOT_INITIALIZED = const StaticWarningCode.con1('FINAL_NOT_INITIALIZED', 23, "The final variable '%s' must be initialized");
 
   /**
    * 15.5 Function Types: It is a static warning if a concrete class implements Function and does
    * not have a concrete method named call().
    */
-  static final StaticWarningCode FUNCTION_WITHOUT_CALL = new StaticWarningCode.con1('FUNCTION_WITHOUT_CALL', 24, "Concrete classes that implement Function must implement the method call()");
+  static const StaticWarningCode FUNCTION_WITHOUT_CALL = const StaticWarningCode.con1('FUNCTION_WITHOUT_CALL', 24, "Concrete classes that implement Function must implement the method call()");
 
   /**
    * 14.1 Imports: It is a static warning to import two different libraries with the same name.
    *
    * @param uri1 the uri pointing to a first library
    * @param uri2 the uri pointing to a second library
    * @param name the shared name of the imported libraries
    */
-  static final StaticWarningCode IMPORT_DUPLICATED_LIBRARY_NAME = new StaticWarningCode.con1('IMPORT_DUPLICATED_LIBRARY_NAME', 25, "The imported libraries '%s' and '%s' should not have the same name '%s'");
+  static const StaticWarningCode IMPORT_DUPLICATED_LIBRARY_NAME = const StaticWarningCode.con1('IMPORT_DUPLICATED_LIBRARY_NAME', 25, "The imported libraries '%s' and '%s' should not have the same name '%s'");
 
   /**
    * 8.1.1 Inheritance and Overriding: However, if there are multiple members <i>m<sub>1</sub>,
    * &hellip; m<sub>k</sub></i> with the same name <i>n</i> that would be inherited (because
    * identically named members existed in several superinterfaces) then at most one member is
    * inherited.
    *
    * If some but not all of the <i>m<sub>i</sub>, 1 &lt;= i &lt;= k</i>, are getters, or if some but
    * not all of the <i>m<sub>i</sub></i> are setters, none of the <i>m<sub>i</sub></i> are
    * inherited, and a static warning is issued.
    */
-  static final StaticWarningCode INCONSISTENT_METHOD_INHERITANCE_GETTER_AND_METHOD = new StaticWarningCode.con1('INCONSISTENT_METHOD_INHERITANCE_GETTER_AND_METHOD', 26, "'%s' is inherited as a getter and also a method");
+  static const StaticWarningCode INCONSISTENT_METHOD_INHERITANCE_GETTER_AND_METHOD = const StaticWarningCode.con1('INCONSISTENT_METHOD_INHERITANCE_GETTER_AND_METHOD', 26, "'%s' is inherited as a getter and also a method");
 
   /**
    * 7.1 Instance Methods: It is a static warning if a class <i>C</i> declares an instance method
    * named <i>n</i> and an accessible static member named <i>n</i> is declared in a superclass of
    * <i>C</i>.
    *
    * @param memberName the name of the member with the name conflict
    * @param superclassName the name of the enclosing class that has the static member
    */
-  static final StaticWarningCode INSTANCE_METHOD_NAME_COLLIDES_WITH_SUPERCLASS_STATIC = new StaticWarningCode.con1('INSTANCE_METHOD_NAME_COLLIDES_WITH_SUPERCLASS_STATIC', 27, "'%s' collides with a static member in the superclass '%s'");
+  static const StaticWarningCode INSTANCE_METHOD_NAME_COLLIDES_WITH_SUPERCLASS_STATIC = const StaticWarningCode.con1('INSTANCE_METHOD_NAME_COLLIDES_WITH_SUPERCLASS_STATIC', 27, "'%s' collides with a static member in the superclass '%s'");
 
   /**
    * 7.2 Getters: It is a static warning if a getter <i>m1</i> overrides a getter <i>m2</i> and the
    * type of <i>m1</i> is not a subtype of the type of <i>m2</i>.
    *
    * @param actualReturnTypeName the name of the expected return type
    * @param expectedReturnType the name of the actual return type, not assignable to the
    *          actualReturnTypeName
    * @param className the name of the class where the overridden getter is declared
    * @see #INVALID_METHOD_OVERRIDE_RETURN_TYPE
    */
-  static final StaticWarningCode INVALID_GETTER_OVERRIDE_RETURN_TYPE = new StaticWarningCode.con1('INVALID_GETTER_OVERRIDE_RETURN_TYPE', 28, "The return type '%s' is not assignable to '%s' as required by the getter it is overriding from '%s'");
+  static const StaticWarningCode INVALID_GETTER_OVERRIDE_RETURN_TYPE = const StaticWarningCode.con1('INVALID_GETTER_OVERRIDE_RETURN_TYPE', 28, "The return type '%s' is not assignable to '%s' as required by the getter it is overriding from '%s'");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance method <i>m2</i> and the type of <i>m1</i> is not a subtype of the type of <i>m2</i>.
    *
    * @param actualParamTypeName the name of the expected parameter type
    * @param expectedParamType the name of the actual parameter type, not assignable to the
    *          actualParamTypeName
    * @param className the name of the class where the overridden method is declared
    */
-  static final StaticWarningCode INVALID_METHOD_OVERRIDE_NAMED_PARAM_TYPE = new StaticWarningCode.con1('INVALID_METHOD_OVERRIDE_NAMED_PARAM_TYPE', 29, "The parameter type '%s' is not assignable to '%s' as required by the method it is overriding from '%s'");
+  static const StaticWarningCode INVALID_METHOD_OVERRIDE_NAMED_PARAM_TYPE = const StaticWarningCode.con1('INVALID_METHOD_OVERRIDE_NAMED_PARAM_TYPE', 29, "The parameter type '%s' is not assignable to '%s' as required by the method it is overriding from '%s'");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance method <i>m2</i> and the type of <i>m1</i> is not a subtype of the type of <i>m2</i>.
    *
    * @param actualParamTypeName the name of the expected parameter type
    * @param expectedParamType the name of the actual parameter type, not assignable to the
    *          actualParamTypeName
    * @param className the name of the class where the overridden method is declared
    * @see #INVALID_SETTER_OVERRIDE_NORMAL_PARAM_TYPE
    */
-  static final StaticWarningCode INVALID_METHOD_OVERRIDE_NORMAL_PARAM_TYPE = new StaticWarningCode.con1('INVALID_METHOD_OVERRIDE_NORMAL_PARAM_TYPE', 30, "The parameter type '%s' is not assignable to '%s' as required by the method it is overriding from '%s'");
+  static const StaticWarningCode INVALID_METHOD_OVERRIDE_NORMAL_PARAM_TYPE = const StaticWarningCode.con1('INVALID_METHOD_OVERRIDE_NORMAL_PARAM_TYPE', 30, "The parameter type '%s' is not assignable to '%s' as required by the method it is overriding from '%s'");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance method <i>m2</i> and the type of <i>m1</i> is not a subtype of the type of <i>m2</i>.
    *
    * @param actualParamTypeName the name of the expected parameter type
    * @param expectedParamType the name of the actual parameter type, not assignable to the
    *          actualParamTypeName
    * @param className the name of the class where the overridden method is declared
    */
-  static final StaticWarningCode INVALID_METHOD_OVERRIDE_OPTIONAL_PARAM_TYPE = new StaticWarningCode.con1('INVALID_METHOD_OVERRIDE_OPTIONAL_PARAM_TYPE', 31, "The parameter type '%s' is not assignable to '%s' as required by the method it is overriding from '%s'");
+  static const StaticWarningCode INVALID_METHOD_OVERRIDE_OPTIONAL_PARAM_TYPE = const StaticWarningCode.con1('INVALID_METHOD_OVERRIDE_OPTIONAL_PARAM_TYPE', 31, "The parameter type '%s' is not assignable to '%s' as required by the method it is overriding from '%s'");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance method <i>m2</i> and the type of <i>m1</i> is not a subtype of the type of <i>m2</i>.
    *
    * @param actualReturnTypeName the name of the expected return type
    * @param expectedReturnType the name of the actual return type, not assignable to the
    *          actualReturnTypeName
    * @param className the name of the class where the overridden method is declared
    * @see #INVALID_GETTER_OVERRIDE_RETURN_TYPE
    */
-  static final StaticWarningCode INVALID_METHOD_OVERRIDE_RETURN_TYPE = new StaticWarningCode.con1('INVALID_METHOD_OVERRIDE_RETURN_TYPE', 32, "The return type '%s' is not assignable to '%s' as required by the method it is overriding from '%s'");
+  static const StaticWarningCode INVALID_METHOD_OVERRIDE_RETURN_TYPE = const StaticWarningCode.con1('INVALID_METHOD_OVERRIDE_RETURN_TYPE', 32, "The return type '%s' is not assignable to '%s' as required by the method it is overriding from '%s'");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance member <i>m2</i>, the signature of <i>m2</i> explicitly specifies a default value for
    * a formal parameter <i>p</i> and the signature of <i>m1</i> specifies a different default value
    * for <i>p</i>.
    */
-  static final StaticWarningCode INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_NAMED = new StaticWarningCode.con1('INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_NAMED', 33, "Parameters cannot override default values, this method overrides '%s.%s' where '%s' has a different value");
+  static const StaticWarningCode INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_NAMED = const StaticWarningCode.con1('INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_NAMED', 33, "Parameters cannot override default values, this method overrides '%s.%s' where '%s' has a different value");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance member <i>m2</i>, the signature of <i>m2</i> explicitly specifies a default value for
    * a formal parameter <i>p</i> and the signature of <i>m1</i> specifies a different default value
    * for <i>p</i>.
    */
-  static final StaticWarningCode INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_POSITIONAL = new StaticWarningCode.con1('INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_POSITIONAL', 34, "Parameters cannot override default values, this method overrides '%s.%s' where this positional parameter has a different value");
+  static const StaticWarningCode INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_POSITIONAL = const StaticWarningCode.con1('INVALID_OVERRIDE_DIFFERENT_DEFAULT_VALUES_POSITIONAL', 34, "Parameters cannot override default values, this method overrides '%s.%s' where this positional parameter has a different value");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance member <i>m2</i> and <i>m1</i> does not declare all the named parameters declared by
    * <i>m2</i>.
    *
    * @param paramCount the number of named parameters in the overridden member
    * @param className the name of the class from the overridden method
    */
-  static final StaticWarningCode INVALID_OVERRIDE_NAMED = new StaticWarningCode.con1('INVALID_OVERRIDE_NAMED', 35, "Missing the named parameter '%s' to match the overridden method from '%s'");
+  static const StaticWarningCode INVALID_OVERRIDE_NAMED = const StaticWarningCode.con1('INVALID_OVERRIDE_NAMED', 35, "Missing the named parameter '%s' to match the overridden method from '%s'");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance member <i>m2</i> and <i>m1</i> has fewer positional parameters than <i>m2</i>.
    *
    * @param paramCount the number of positional parameters in the overridden member
    * @param className the name of the class from the overridden method
    */
-  static final StaticWarningCode INVALID_OVERRIDE_POSITIONAL = new StaticWarningCode.con1('INVALID_OVERRIDE_POSITIONAL', 36, "Must have at least %d parameters to match the overridden method from '%s'");
+  static const StaticWarningCode INVALID_OVERRIDE_POSITIONAL = const StaticWarningCode.con1('INVALID_OVERRIDE_POSITIONAL', 36, "Must have at least %d parameters to match the overridden method from '%s'");
 
   /**
    * 7.1 Instance Methods: It is a static warning if an instance method <i>m1</i> overrides an
    * instance member <i>m2</i> and <i>m1</i> has a greater number of required parameters than
    * <i>m2</i>.
    *
    * @param paramCount the number of required parameters in the overridden member
    * @param className the name of the class from the overridden method
    */
-  static final StaticWarningCode INVALID_OVERRIDE_REQUIRED = new StaticWarningCode.con1('INVALID_OVERRIDE_REQUIRED', 37, "Must have %d required parameters or less to match the overridden method from '%s'");
+  static const StaticWarningCode INVALID_OVERRIDE_REQUIRED = const StaticWarningCode.con1('INVALID_OVERRIDE_REQUIRED', 37, "Must have %d required parameters or less to match the overridden method from '%s'");
 
   /**
    * 7.3 Setters: It is a static warning if a setter <i>m1</i> overrides a setter <i>m2</i> and the
    * type of <i>m1</i> is not a subtype of the type of <i>m2</i>.
    *
    * @param actualParamTypeName the name of the expected parameter type
    * @param expectedParamType the name of the actual parameter type, not assignable to the
    *          actualParamTypeName
    * @param className the name of the class where the overridden setter is declared
    * @see #INVALID_METHOD_OVERRIDE_NORMAL_PARAM_TYPE
    */
-  static final StaticWarningCode INVALID_SETTER_OVERRIDE_NORMAL_PARAM_TYPE = new StaticWarningCode.con1('INVALID_SETTER_OVERRIDE_NORMAL_PARAM_TYPE', 38, "The parameter type '%s' is not assignable to '%s' as required by the setter it is overriding from '%s'");
+  static const StaticWarningCode INVALID_SETTER_OVERRIDE_NORMAL_PARAM_TYPE = const StaticWarningCode.con1('INVALID_SETTER_OVERRIDE_NORMAL_PARAM_TYPE', 38, "The parameter type '%s' is not assignable to '%s' as required by the setter it is overriding from '%s'");
 
   /**
    * 12.6 Lists: A run-time list literal &lt;<i>E</i>&gt; [<i>e<sub>1</sub></i> ...
    * <i>e<sub>n</sub></i>] is evaluated as follows:
    * * The operator []= is invoked on <i>a</i> with first argument <i>i</i> and second argument
    * <i>o<sub>i+1</sub></i><i>, 1 &lt;= i &lt;= n</i>
    *
    * 12.14.2 Binding Actuals to Formals: Let <i>T<sub>i</sub></i> be the static type of
    * <i>a<sub>i</sub></i>, let <i>S<sub>i</sub></i> be the type of <i>p<sub>i</sub>, 1 &lt;= i &lt;=
    * n+k</i> and let <i>S<sub>q</sub></i> be the type of the named parameter <i>q</i> of <i>f</i>.
    * It is a static warning if <i>T<sub>j</sub></i> may not be assigned to <i>S<sub>j</sub>, 1 &lt;=
    * j &lt;= m</i>.
    */
-  static final StaticWarningCode LIST_ELEMENT_TYPE_NOT_ASSIGNABLE = new StaticWarningCode.con1('LIST_ELEMENT_TYPE_NOT_ASSIGNABLE', 39, "The element type '%s' cannot be assigned to the list type '%s'");
+  static const StaticWarningCode LIST_ELEMENT_TYPE_NOT_ASSIGNABLE = const StaticWarningCode.con1('LIST_ELEMENT_TYPE_NOT_ASSIGNABLE', 39, "The element type '%s' cannot be assigned to the list type '%s'");
 
   /**
    * 12.7 Map: A run-time map literal &lt;<i>K</i>, <i>V</i>&gt; [<i>k<sub>1</sub></i> :
    * <i>e<sub>1</sub></i> ... <i>k<sub>n</sub></i> : <i>e<sub>n</sub></i>] is evaluated as follows:
    * * The operator []= is invoked on <i>m</i> with first argument <i>k<sub>i</sub></i> and second
    * argument <i>e<sub>i</sub></i><i>, 1 &lt;= i &lt;= n</i>
    *
    * 12.14.2 Binding Actuals to Formals: Let <i>T<sub>i</sub></i> be the static type of
    * <i>a<sub>i</sub></i>, let <i>S<sub>i</sub></i> be the type of <i>p<sub>i</sub>, 1 &lt;= i &lt;=
    * n+k</i> and let <i>S<sub>q</sub></i> be the type of the named parameter <i>q</i> of <i>f</i>.
    * It is a static warning if <i>T<sub>j</sub></i> may not be assigned to <i>S<sub>j</sub>, 1 &lt;=
    * j &lt;= m</i>.
    */
-  static final StaticWarningCode MAP_KEY_TYPE_NOT_ASSIGNABLE = new StaticWarningCode.con1('MAP_KEY_TYPE_NOT_ASSIGNABLE', 40, "The element type '%s' cannot be assigned to the map key type '%s'");
+  static const StaticWarningCode MAP_KEY_TYPE_NOT_ASSIGNABLE = const StaticWarningCode.con1('MAP_KEY_TYPE_NOT_ASSIGNABLE', 40, "The element type '%s' cannot be assigned to the map key type '%s'");
 
   /**
    * 12.7 Map: A run-time map literal &lt;<i>K</i>, <i>V</i>&gt; [<i>k<sub>1</sub></i> :
    * <i>e<sub>1</sub></i> ... <i>k<sub>n</sub></i> : <i>e<sub>n</sub></i>] is evaluated as follows:
    * * The operator []= is invoked on <i>m</i> with first argument <i>k<sub>i</sub></i> and second
    * argument <i>e<sub>i</sub></i><i>, 1 &lt;= i &lt;= n</i>
    *
    * 12.14.2 Binding Actuals to Formals: Let <i>T<sub>i</sub></i> be the static type of
    * <i>a<sub>i</sub></i>, let <i>S<sub>i</sub></i> be the type of <i>p<sub>i</sub>, 1 &lt;= i &lt;=
    * n+k</i> and let <i>S<sub>q</sub></i> be the type of the named parameter <i>q</i> of <i>f</i>.
    * It is a static warning if <i>T<sub>j</sub></i> may not be assigned to <i>S<sub>j</sub>, 1 &lt;=
    * j &lt;= m</i>.
    */
-  static final StaticWarningCode MAP_VALUE_TYPE_NOT_ASSIGNABLE = new StaticWarningCode.con1('MAP_VALUE_TYPE_NOT_ASSIGNABLE', 41, "The element type '%s' cannot be assigned to the map value type '%s'");
+  static const StaticWarningCode MAP_VALUE_TYPE_NOT_ASSIGNABLE = const StaticWarningCode.con1('MAP_VALUE_TYPE_NOT_ASSIGNABLE', 41, "The element type '%s' cannot be assigned to the map value type '%s'");
 
   /**
    * 7.3 Setters: It is a static warning if a class has a setter named <i>v=</i> with argument type
    * <i>T</i> and a getter named <i>v</i> with return type <i>S</i>, and <i>T</i> may not be
    * assigned to <i>S</i>.
    */
-  static final StaticWarningCode MISMATCHED_GETTER_AND_SETTER_TYPES = new StaticWarningCode.con1('MISMATCHED_GETTER_AND_SETTER_TYPES', 42, "The parameter type for setter '%s' is '%s' which is not assignable to its getter (of type '%s')");
+  static const StaticWarningCode MISMATCHED_GETTER_AND_SETTER_TYPES = const StaticWarningCode.con1('MISMATCHED_GETTER_AND_SETTER_TYPES', 42, "The parameter type for setter '%s' is '%s' which is not assignable to its getter (of type '%s')");
 
   /**
    * 7.3 Setters: It is a static warning if a class has a setter named <i>v=</i> with argument type
    * <i>T</i> and a getter named <i>v</i> with return type <i>S</i>, and <i>T</i> may not be
    * assigned to <i>S</i>.
    */
-  static final StaticWarningCode MISMATCHED_GETTER_AND_SETTER_TYPES_FROM_SUPERTYPE = new StaticWarningCode.con1('MISMATCHED_GETTER_AND_SETTER_TYPES_FROM_SUPERTYPE', 43, "The parameter type for setter '%s' is '%s' which is not assignable to its getter (of type '%s'), from superclass '%s'");
+  static const StaticWarningCode MISMATCHED_GETTER_AND_SETTER_TYPES_FROM_SUPERTYPE = const StaticWarningCode.con1('MISMATCHED_GETTER_AND_SETTER_TYPES_FROM_SUPERTYPE', 43, "The parameter type for setter '%s' is '%s' which is not assignable to its getter (of type '%s'), from superclass '%s'");
 
   /**
    * 13.12 Return: It is a static warning if a function contains both one or more return statements
    * of the form <i>return;</i> and one or more return statements of the form <i>return e;</i>.
    */
-  static final StaticWarningCode MIXED_RETURN_TYPES = new StaticWarningCode.con1('MIXED_RETURN_TYPES', 44, "Methods and functions cannot use return both with and without values");
+  static const StaticWarningCode MIXED_RETURN_TYPES = const StaticWarningCode.con1('MIXED_RETURN_TYPES', 44, "Methods and functions cannot use return both with and without values");
 
   /**
    * 12.11.1 New: It is a static warning if <i>q</i> is a constructor of an abstract class and
    * <i>q</i> is not a factory constructor.
    */
-  static final StaticWarningCode NEW_WITH_ABSTRACT_CLASS = new StaticWarningCode.con1('NEW_WITH_ABSTRACT_CLASS', 45, "Abstract classes cannot be created with a 'new' expression");
+  static const StaticWarningCode NEW_WITH_ABSTRACT_CLASS = const StaticWarningCode.con1('NEW_WITH_ABSTRACT_CLASS', 45, "Abstract classes cannot be created with a 'new' expression");
 
   /**
    * 15.8 Parameterized Types: Any use of a malbounded type gives rise to a static warning.
    *
    * @param typeName the name of the type being referenced (<i>S</i>)
    * @param parameterCount the number of type parameters that were declared
    * @param argumentCount the number of type arguments provided
    * @see CompileTimeErrorCode#CONST_WITH_INVALID_TYPE_PARAMETERS
    * @see StaticTypeWarningCode#WRONG_NUMBER_OF_TYPE_ARGUMENTS
    */
-  static final StaticWarningCode NEW_WITH_INVALID_TYPE_PARAMETERS = new StaticWarningCode.con1('NEW_WITH_INVALID_TYPE_PARAMETERS', 46, "The type '%s' is declared with %d type parameters, but %d type arguments were given");
+  static const StaticWarningCode NEW_WITH_INVALID_TYPE_PARAMETERS = const StaticWarningCode.con1('NEW_WITH_INVALID_TYPE_PARAMETERS', 46, "The type '%s' is declared with %d type parameters, but %d type arguments were given");
 
   /**
    * 12.11.1 New: It is a static warning if <i>T</i> is not a class accessible in the current scope,
    * optionally followed by type arguments.
    *
    * @param name the name of the non-type element
    */
-  static final StaticWarningCode NEW_WITH_NON_TYPE = new StaticWarningCode.con1('NEW_WITH_NON_TYPE', 47, "The name '%s' is not a class");
+  static const StaticWarningCode NEW_WITH_NON_TYPE = const StaticWarningCode.con1('NEW_WITH_NON_TYPE', 47, "The name '%s' is not a class");
 
   /**
    * 12.11.1 New: If <i>T</i> is a class or parameterized type accessible in the current scope then:
    * 1. If <i>e</i> is of the form <i>new T.id(a<sub>1</sub>, &hellip;, a<sub>n</sub>,
    * x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;, x<sub>n+k</sub>: a<sub>n+k</sub>)</i> it is a
    * static warning if <i>T.id</i> is not the name of a constructor declared by the type <i>T</i>.
    * If <i>e</i> of the form <i>new T(a<sub>1</sub>, &hellip;, a<sub>n</sub>, x<sub>n+1</sub>:
    * a<sub>n+1</sub>, &hellip; x<sub>n+k</sub>: a<sub>n+kM/sub>)</i> it is a static warning if the
    * type <i>T</i> does not declare a constructor with the same name as the declaration of <i>T</i>.
    */
-  static final StaticWarningCode NEW_WITH_UNDEFINED_CONSTRUCTOR = new StaticWarningCode.con1('NEW_WITH_UNDEFINED_CONSTRUCTOR', 48, "The class '%s' does not have a constructor '%s'");
+  static const StaticWarningCode NEW_WITH_UNDEFINED_CONSTRUCTOR = const StaticWarningCode.con1('NEW_WITH_UNDEFINED_CONSTRUCTOR', 48, "The class '%s' does not have a constructor '%s'");
 
   /**
    * 12.11.1 New: If <i>T</i> is a class or parameterized type accessible in the current scope then:
    * 1. If <i>e</i> is of the form <i>new T.id(a<sub>1</sub>, &hellip;, a<sub>n</sub>,
    * x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;, x<sub>n+k</sub>: a<sub>n+k</sub>)</i> it is a
    * static warning if <i>T.id</i> is not the name of a constructor declared by the type <i>T</i>.
    * If <i>e</i> of the form <i>new T(a<sub>1</sub>, &hellip;, a<sub>n</sub>, x<sub>n+1</sub>:
    * a<sub>n+1</sub>, &hellip; x<sub>n+k</sub>: a<sub>n+kM/sub>)</i> it is a static warning if the
    * type <i>T</i> does not declare a constructor with the same name as the declaration of <i>T</i>.
    */
-  static final StaticWarningCode NEW_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT = new StaticWarningCode.con1('NEW_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT', 49, "The class '%s' does not have a default constructor");
+  static const StaticWarningCode NEW_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT = const StaticWarningCode.con1('NEW_WITH_UNDEFINED_CONSTRUCTOR_DEFAULT', 49, "The class '%s' does not have a default constructor");
 
   /**
    * 7.9.1 Inheritance and Overriding: It is a static warning if a non-abstract class inherits an
    * abstract method.
    *
    * 7.10 Superinterfaces: Let <i>C</i> be a concrete class that does not declare its own
    * <i>noSuchMethod()</i> method. It is a static warning if the implicit interface of <i>C</i>
    * includes an instance member <i>m</i> of type <i>F</i> and <i>C</i> does not declare or inherit
    * a corresponding instance member <i>m</i> of type <i>F'</i> such that <i>F' <: F</i>.
    *
    * 7.4 Abstract Instance Members: It is a static warning if an abstract member is declared or
    * inherited in a concrete class unless that member overrides a concrete one.
    *
    * @param memberName the name of the first member
    * @param memberName the name of the second member
    * @param memberName the name of the third member
    * @param memberName the name of the fourth member
    * @param additionalCount the number of additional missing members that aren't listed
    */
-  static final StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FIVE_PLUS = new StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FIVE_PLUS', 50, "Missing concrete implementation of '%s', '%s', '%s', '%s' and %d more");
+  static const StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FIVE_PLUS = const StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FIVE_PLUS', 50, "Missing concrete implementation of '%s', '%s', '%s', '%s' and %d more");
 
   /**
    * 7.9.1 Inheritance and Overriding: It is a static warning if a non-abstract class inherits an
    * abstract method.
    *
    * 7.10 Superinterfaces: Let <i>C</i> be a concrete class that does not declare its own
    * <i>noSuchMethod()</i> method. It is a static warning if the implicit interface of <i>C</i>
    * includes an instance member <i>m</i> of type <i>F</i> and <i>C</i> does not declare or inherit
    * a corresponding instance member <i>m</i> of type <i>F'</i> such that <i>F' <: F</i>.
    *
    * 7.4 Abstract Instance Members: It is a static warning if an abstract member is declared or
    * inherited in a concrete class unless that member overrides a concrete one.
    *
    * @param memberName the name of the first member
    * @param memberName the name of the second member
    * @param memberName the name of the third member
    * @param memberName the name of the fourth member
    */
-  static final StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FOUR = new StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FOUR', 51, "Missing concrete implementation of '%s', '%s', '%s' and '%s'");
+  static const StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FOUR = const StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_FOUR', 51, "Missing concrete implementation of '%s', '%s', '%s' and '%s'");
 
   /**
    * 7.9.1 Inheritance and Overriding: It is a static warning if a non-abstract class inherits an
    * abstract method.
    *
    * 7.10 Superinterfaces: Let <i>C</i> be a concrete class that does not declare its own
    * <i>noSuchMethod()</i> method. It is a static warning if the implicit interface of <i>C</i>
    * includes an instance member <i>m</i> of type <i>F</i> and <i>C</i> does not declare or inherit
    * a corresponding instance member <i>m</i> of type <i>F'</i> such that <i>F' <: F</i>.
    *
    * 7.4 Abstract Instance Members: It is a static warning if an abstract member is declared or
    * inherited in a concrete class unless that member overrides a concrete one.
    *
    * @param memberName the name of the member
    */
-  static final StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE = new StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE', 52, "Missing concrete implementation of '%s'");
+  static const StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE = const StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_ONE', 52, "Missing concrete implementation of '%s'");
 
   /**
    * 7.9.1 Inheritance and Overriding: It is a static warning if a non-abstract class inherits an
    * abstract method.
    *
    * 7.10 Superinterfaces: Let <i>C</i> be a concrete class that does not declare its own
    * <i>noSuchMethod()</i> method. It is a static warning if the implicit interface of <i>C</i>
    * includes an instance member <i>m</i> of type <i>F</i> and <i>C</i> does not declare or inherit
    * a corresponding instance member <i>m</i> of type <i>F'</i> such that <i>F' <: F</i>.
    *
    * 7.4 Abstract Instance Members: It is a static warning if an abstract member is declared or
    * inherited in a concrete class unless that member overrides a concrete one.
    *
    * @param memberName the name of the first member
    * @param memberName the name of the second member
    * @param memberName the name of the third member
    */
-  static final StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_THREE = new StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_THREE', 53, "Missing concrete implementation of '%s', '%s' and '%s'");
+  static const StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_THREE = const StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_THREE', 53, "Missing concrete implementation of '%s', '%s' and '%s'");
 
   /**
    * 7.9.1 Inheritance and Overriding: It is a static warning if a non-abstract class inherits an
    * abstract method.
    *
    * 7.10 Superinterfaces: Let <i>C</i> be a concrete class that does not declare its own
    * <i>noSuchMethod()</i> method. It is a static warning if the implicit interface of <i>C</i>
    * includes an instance member <i>m</i> of type <i>F</i> and <i>C</i> does not declare or inherit
    * a corresponding instance member <i>m</i> of type <i>F'</i> such that <i>F' <: F</i>.
    *
    * 7.4 Abstract Instance Members: It is a static warning if an abstract member is declared or
    * inherited in a concrete class unless that member overrides a concrete one.
    *
    * @param memberName the name of the first member
    * @param memberName the name of the second member
    */
-  static final StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_TWO = new StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_TWO', 54, "Missing concrete implementation of '%s' and '%s'");
+  static const StaticWarningCode NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_TWO = const StaticWarningCode.con1('NON_ABSTRACT_CLASS_INHERITS_ABSTRACT_MEMBER_TWO', 54, "Missing concrete implementation of '%s' and '%s'");
 
   /**
    * 13.11 Try: An on-catch clause of the form <i>on T catch (p<sub>1</sub>, p<sub>2</sub>) s</i> or
    * <i>on T s</i> matches an object <i>o</i> if the type of <i>o</i> is a subtype of <i>T</i>. It
    * is a static warning if <i>T</i> does not denote a type available in the lexical scope of the
    * catch clause.
    *
    * @param name the name of the non-type element
    */
-  static final StaticWarningCode NON_TYPE_IN_CATCH_CLAUSE = new StaticWarningCode.con1('NON_TYPE_IN_CATCH_CLAUSE', 55, "The name '%s' is not a type and cannot be used in an on-catch clause");
+  static const StaticWarningCode NON_TYPE_IN_CATCH_CLAUSE = const StaticWarningCode.con1('NON_TYPE_IN_CATCH_CLAUSE', 55, "The name '%s' is not a type and cannot be used in an on-catch clause");
 
   /**
    * 7.1.1 Operators: It is a static warning if the return type of the user-declared operator []= is
    * explicitly declared and not void.
    */
-  static final StaticWarningCode NON_VOID_RETURN_FOR_OPERATOR = new StaticWarningCode.con1('NON_VOID_RETURN_FOR_OPERATOR', 56, "The return type of the operator []= must be 'void'");
+  static const StaticWarningCode NON_VOID_RETURN_FOR_OPERATOR = const StaticWarningCode.con1('NON_VOID_RETURN_FOR_OPERATOR', 56, "The return type of the operator []= must be 'void'");
 
   /**
    * 7.3 Setters: It is a static warning if a setter declares a return type other than void.
    */
-  static final StaticWarningCode NON_VOID_RETURN_FOR_SETTER = new StaticWarningCode.con1('NON_VOID_RETURN_FOR_SETTER', 57, "The return type of the setter must be 'void'");
+  static const StaticWarningCode NON_VOID_RETURN_FOR_SETTER = const StaticWarningCode.con1('NON_VOID_RETURN_FOR_SETTER', 57, "The return type of the setter must be 'void'");
 
   /**
    * 15.1 Static Types: A type <i>T</i> is malformed iff: * <i>T</i> has the form <i>id</i> or the
    * form <i>prefix.id</i>, and in the enclosing lexical scope, the name <i>id</i> (respectively
    * <i>prefix.id</i>) does not denote a type. * <i>T</i> denotes a type parameter in the
    * enclosing lexical scope, but occurs in the signature or body of a static member. *
    * <i>T</i> is a parameterized type of the form <i>G&lt;S<sub>1</sub>, .., S<sub>n</sub>&gt;</i>,
    *
    * Any use of a malformed type gives rise to a static warning.
    *
    * @param nonTypeName the name that is not a type
    */
-  static final StaticWarningCode NOT_A_TYPE = new StaticWarningCode.con1('NOT_A_TYPE', 58, "%s is not a type");
+  static const StaticWarningCode NOT_A_TYPE = const StaticWarningCode.con1('NOT_A_TYPE', 58, "%s is not a type");
 
   /**
    * 12.14.2 Binding Actuals to Formals: It is a static warning if <i>m &lt; h</i> or if <i>m &gt;
    * n</i>.
    *
    * @param requiredCount the expected number of required arguments
    * @param argumentCount the actual number of positional arguments given
    * @see #EXTRA_POSITIONAL_ARGUMENTS
    */
-  static final StaticWarningCode NOT_ENOUGH_REQUIRED_ARGUMENTS = new StaticWarningCode.con1('NOT_ENOUGH_REQUIRED_ARGUMENTS', 59, "%d required argument(s) expected, but %d found");
+  static const StaticWarningCode NOT_ENOUGH_REQUIRED_ARGUMENTS = const StaticWarningCode.con1('NOT_ENOUGH_REQUIRED_ARGUMENTS', 59, "%d required argument(s) expected, but %d found");
 
   /**
    * 14.3 Parts: It is a static warning if the referenced part declaration <i>p</i> names a library
    * other than the current library as the library to which <i>p</i> belongs.
    *
    * @param expectedLibraryName the name of expected library name
    * @param actualLibraryName the non-matching actual library name from the "part of" declaration
    */
-  static final StaticWarningCode PART_OF_DIFFERENT_LIBRARY = new StaticWarningCode.con1('PART_OF_DIFFERENT_LIBRARY', 60, "Expected this library to be part of '%s', not '%s'");
+  static const StaticWarningCode PART_OF_DIFFERENT_LIBRARY = const StaticWarningCode.con1('PART_OF_DIFFERENT_LIBRARY', 60, "Expected this library to be part of '%s', not '%s'");
 
   /**
    * 7.6.2 Factories: It is a static warning if the function type of <i>k'</i> is not a subtype of
    * the type of <i>k</i>.
    *
    * @param redirectedName the name of the redirected constructor
    * @param redirectingName the name of the redirecting constructor
    */
-  static final StaticWarningCode REDIRECT_TO_INVALID_FUNCTION_TYPE = new StaticWarningCode.con1('REDIRECT_TO_INVALID_FUNCTION_TYPE', 61, "The redirected constructor '%s' has incompatible parameters with '%s'");
+  static const StaticWarningCode REDIRECT_TO_INVALID_FUNCTION_TYPE = const StaticWarningCode.con1('REDIRECT_TO_INVALID_FUNCTION_TYPE', 61, "The redirected constructor '%s' has incompatible parameters with '%s'");
 
   /**
    * 7.6.2 Factories: It is a static warning if the function type of <i>k'</i> is not a subtype of
    * the type of <i>k</i>.
    *
    * @param redirectedName the name of the redirected constructor return type
    * @param redirectingName the name of the redirecting constructor return type
    */
-  static final StaticWarningCode REDIRECT_TO_INVALID_RETURN_TYPE = new StaticWarningCode.con1('REDIRECT_TO_INVALID_RETURN_TYPE', 62, "The return type '%s' of the redirected constructor is not assignable to '%s'");
+  static const StaticWarningCode REDIRECT_TO_INVALID_RETURN_TYPE = const StaticWarningCode.con1('REDIRECT_TO_INVALID_RETURN_TYPE', 62, "The return type '%s' of the redirected constructor is not assignable to '%s'");
 
   /**
    * 7.6.2 Factories: It is a static warning if type does not denote a class accessible in the
    * current scope; if type does denote such a class <i>C</i> it is a static warning if the
    * referenced constructor (be it <i>type</i> or <i>type.id</i>) is not a constructor of <i>C</i>.
    */
-  static final StaticWarningCode REDIRECT_TO_MISSING_CONSTRUCTOR = new StaticWarningCode.con1('REDIRECT_TO_MISSING_CONSTRUCTOR', 63, "The constructor '%s' could not be found in '%s'");
+  static const StaticWarningCode REDIRECT_TO_MISSING_CONSTRUCTOR = const StaticWarningCode.con1('REDIRECT_TO_MISSING_CONSTRUCTOR', 63, "The constructor '%s' could not be found in '%s'");
 
   /**
    * 7.6.2 Factories: It is a static warning if type does not denote a class accessible in the
    * current scope; if type does denote such a class <i>C</i> it is a static warning if the
    * referenced constructor (be it <i>type</i> or <i>type.id</i>) is not a constructor of <i>C</i>.
    */
-  static final StaticWarningCode REDIRECT_TO_NON_CLASS = new StaticWarningCode.con1('REDIRECT_TO_NON_CLASS', 64, "The name '%s' is not a type and cannot be used in a redirected constructor");
+  static const StaticWarningCode REDIRECT_TO_NON_CLASS = const StaticWarningCode.con1('REDIRECT_TO_NON_CLASS', 64, "The name '%s' is not a type and cannot be used in a redirected constructor");
 
   /**
    * 13.11 Return: Let <i>f</i> be the function immediately enclosing a return statement of the form
    * <i>return;</i> It is a static warning if both of the following conditions hold:
    * <ol>
    * * <i>f</i> is not a generative constructor.
    * * The return type of <i>f</i> may not be assigned to void.
    * </ol>
    */
-  static final StaticWarningCode RETURN_WITHOUT_VALUE = new StaticWarningCode.con1('RETURN_WITHOUT_VALUE', 65, "Missing return value after 'return'");
+  static const StaticWarningCode RETURN_WITHOUT_VALUE = const StaticWarningCode.con1('RETURN_WITHOUT_VALUE', 65, "Missing return value after 'return'");
 
   /**
    * 12.16.3 Static Invocation: It is a static warning if <i>C</i> does not declare a static method
    * or getter <i>m</i>.
    *
    * @param memberName the name of the instance member
    */
-  static final StaticWarningCode STATIC_ACCESS_TO_INSTANCE_MEMBER = new StaticWarningCode.con1('STATIC_ACCESS_TO_INSTANCE_MEMBER', 66, "Instance member '%s' cannot be accessed using static access");
+  static const StaticWarningCode STATIC_ACCESS_TO_INSTANCE_MEMBER = const StaticWarningCode.con1('STATIC_ACCESS_TO_INSTANCE_MEMBER', 66, "Instance member '%s' cannot be accessed using static access");
 
   /**
    * 13.9 Switch: It is a static warning if the type of <i>e</i> may not be assigned to the type of
    * <i>e<sub>k</sub></i>.
    */
-  static final StaticWarningCode SWITCH_EXPRESSION_NOT_ASSIGNABLE = new StaticWarningCode.con1('SWITCH_EXPRESSION_NOT_ASSIGNABLE', 67, "Type '%s' of the switch expression is not assignable to the type '%s' of case expressions");
+  static const StaticWarningCode SWITCH_EXPRESSION_NOT_ASSIGNABLE = const StaticWarningCode.con1('SWITCH_EXPRESSION_NOT_ASSIGNABLE', 67, "Type '%s' of the switch expression is not assignable to the type '%s' of case expressions");
 
   /**
    * 12.31 Type Test: It is a static warning if <i>T</i> does not denote a type available in the
    * current lexical scope.
    */
-  static final StaticWarningCode TYPE_TEST_NON_TYPE = new StaticWarningCode.con1('TYPE_TEST_NON_TYPE', 68, "The name '%s' is not a type and cannot be used in an 'is' expression");
+  static const StaticWarningCode TYPE_TEST_NON_TYPE = const StaticWarningCode.con1('TYPE_TEST_NON_TYPE', 68, "The name '%s' is not a type and cannot be used in an 'is' expression");
 
   /**
    * 10 Generics: However, a type parameter is considered to be a malformed type when referenced by
    * a static member.
    *
    * 15.1 Static Types: Any use of a malformed type gives rise to a static warning. A malformed type
    * is then interpreted as dynamic by the static type checker and the runtime.
    */
-  static final StaticWarningCode TYPE_PARAMETER_REFERENCED_BY_STATIC = new StaticWarningCode.con1('TYPE_PARAMETER_REFERENCED_BY_STATIC', 69, "Static members cannot reference type parameters");
+  static const StaticWarningCode TYPE_PARAMETER_REFERENCED_BY_STATIC = const StaticWarningCode.con1('TYPE_PARAMETER_REFERENCED_BY_STATIC', 69, "Static members cannot reference type parameters");
 
   /**
    * 12.16.3 Static Invocation: A static method invocation <i>i</i> has the form
    * <i>C.m(a<sub>1</sub>, &hellip;, a<sub>n</sub>, x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;
    * x<sub>n+k</sub>: a<sub>n+k</sub>)</i>. It is a static warning if <i>C</i> does not denote a
    * class in the current scope.
    *
    * @param undefinedClassName the name of the undefined class
    */
-  static final StaticWarningCode UNDEFINED_CLASS = new StaticWarningCode.con1('UNDEFINED_CLASS', 70, "Undefined class '%s'");
+  static const StaticWarningCode UNDEFINED_CLASS = const StaticWarningCode.con1('UNDEFINED_CLASS', 70, "Undefined class '%s'");
 
   /**
    * Same as [UNDEFINED_CLASS], but to catch using "boolean" instead of "bool".
    */
-  static final StaticWarningCode UNDEFINED_CLASS_BOOLEAN = new StaticWarningCode.con1('UNDEFINED_CLASS_BOOLEAN', 71, "Undefined class 'boolean'; did you mean 'bool'?");
+  static const StaticWarningCode UNDEFINED_CLASS_BOOLEAN = const StaticWarningCode.con1('UNDEFINED_CLASS_BOOLEAN', 71, "Undefined class 'boolean'; did you mean 'bool'?");
 
   /**
    * 12.17 Getter Invocation: It is a static warning if there is no class <i>C</i> in the enclosing
    * lexical scope of <i>i</i>, or if <i>C</i> does not declare, implicitly or explicitly, a getter
    * named <i>m</i>.
    *
    * @param getterName the name of the getter
    * @param enclosingType the name of the enclosing type where the getter is being looked for
    */
-  static final StaticWarningCode UNDEFINED_GETTER = new StaticWarningCode.con1('UNDEFINED_GETTER', 72, "There is no such getter '%s' in '%s'");
+  static const StaticWarningCode UNDEFINED_GETTER = const StaticWarningCode.con1('UNDEFINED_GETTER', 72, "There is no such getter '%s' in '%s'");
 
   /**
    * 12.30 Identifier Reference: It is as static warning if an identifier expression of the form
    * <i>id</i> occurs inside a top level or static function (be it function, method, getter, or
    * setter) or variable initializer and there is no declaration <i>d</i> with name <i>id</i> in the
    * lexical scope enclosing the expression.
    *
    * @param name the name of the identifier
    */
-  static final StaticWarningCode UNDEFINED_IDENTIFIER = new StaticWarningCode.con1('UNDEFINED_IDENTIFIER', 73, "Undefined name '%s'");
+  static const StaticWarningCode UNDEFINED_IDENTIFIER = const StaticWarningCode.con1('UNDEFINED_IDENTIFIER', 73, "Undefined name '%s'");
 
   /**
    * 12.14.2 Binding Actuals to Formals: Furthermore, each <i>q<sub>i</sub></i>, <i>1<=i<=l</i>,
    * must have a corresponding named parameter in the set {<i>p<sub>n+1</sub></i> ...
    * <i>p<sub>n+k</sub></i>} or a static warning occurs.
    *
    * @param name the name of the requested named parameter
    */
-  static final StaticWarningCode UNDEFINED_NAMED_PARAMETER = new StaticWarningCode.con1('UNDEFINED_NAMED_PARAMETER', 74, "The named parameter '%s' is not defined");
+  static const StaticWarningCode UNDEFINED_NAMED_PARAMETER = const StaticWarningCode.con1('UNDEFINED_NAMED_PARAMETER', 74, "The named parameter '%s' is not defined");
 
   /**
    * 12.18 Assignment: It is as static warning if an assignment of the form <i>v = e</i> occurs
    * inside a top level or static function (be it function, method, getter, or setter) or variable
    * initializer and there is no declaration <i>d</i> with name <i>v=</i> in the lexical scope
    * enclosing the assignment.
    *
    * 12.18 Assignment: It is a static warning if there is no class <i>C</i> in the enclosing lexical
    * scope of the assignment, or if <i>C</i> does not declare, implicitly or explicitly, a setter
    * <i>v=</i>.
    *
    * @param setterName the name of the getter
    * @param enclosingType the name of the enclosing type where the setter is being looked for
    */
-  static final StaticWarningCode UNDEFINED_SETTER = new StaticWarningCode.con1('UNDEFINED_SETTER', 75, "There is no such setter '%s' in '%s'");
+  static const StaticWarningCode UNDEFINED_SETTER = const StaticWarningCode.con1('UNDEFINED_SETTER', 75, "There is no such setter '%s' in '%s'");
 
   /**
    * 12.16.3 Static Invocation: It is a static warning if <i>C</i> does not declare a static method
    * or getter <i>m</i>.
    *
    * @param methodName the name of the method
    * @param enclosingType the name of the enclosing type where the method is being looked for
    */
-  static final StaticWarningCode UNDEFINED_STATIC_METHOD_OR_GETTER = new StaticWarningCode.con1('UNDEFINED_STATIC_METHOD_OR_GETTER', 76, "There is no such static method, getter or setter '%s' in '%s'");
+  static const StaticWarningCode UNDEFINED_STATIC_METHOD_OR_GETTER = const StaticWarningCode.con1('UNDEFINED_STATIC_METHOD_OR_GETTER', 76, "There is no such static method, getter or setter '%s' in '%s'");
 
-  static final List<StaticWarningCode> values = [
+  /**
+   * 7.2 Getters: It is a static warning if the return type of a getter is void.
+   */
+  static const StaticWarningCode VOID_RETURN_FOR_GETTER = const StaticWarningCode.con1('VOID_RETURN_FOR_GETTER', 77, "The return type of the getter must not be 'void'");
+
+  static const List<StaticWarningCode> values = const [
       AMBIGUOUS_IMPORT,
       ARGUMENT_TYPE_NOT_ASSIGNABLE,
       ASSIGNMENT_TO_CONST,
       ASSIGNMENT_TO_FINAL,
       ASSIGNMENT_TO_METHOD,
       CASE_BLOCK_NOT_TERMINATED,
       CAST_TO_NON_TYPE,
       CONCRETE_CLASS_WITH_ABSTRACT_MEMBER,
       CONFLICTING_DART_IMPORT,
       CONFLICTING_INSTANCE_GETTER_AND_SUPERCLASS_MEMBER,
@@ skipping 56 matching lines @@
       STATIC_ACCESS_TO_INSTANCE_MEMBER,
       SWITCH_EXPRESSION_NOT_ASSIGNABLE,
       TYPE_TEST_NON_TYPE,
       TYPE_PARAMETER_REFERENCED_BY_STATIC,
       UNDEFINED_CLASS,
       UNDEFINED_CLASS_BOOLEAN,
       UNDEFINED_GETTER,
       UNDEFINED_IDENTIFIER,
       UNDEFINED_NAMED_PARAMETER,
       UNDEFINED_SETTER,
-      UNDEFINED_STATIC_METHOD_OR_GETTER];
+      UNDEFINED_STATIC_METHOD_OR_GETTER,
+      VOID_RETURN_FOR_GETTER];
 
   /**
    * The template used to create the message to be displayed for this error.
    */
-  String message;
+  final String message;
 
   /**
    * The template used to create the correction to be displayed for this error, or `null` if
    * there is no correction information for this error.
    */
-  String correction7;
+  final String correction;
 
   /**
    * Initialize a newly created error code to have the given message.
    *
    * @param message the message template used to create the message to be displayed for the error
    */
-  StaticWarningCode.con1(String name, int ordinal, String message) : super(name, ordinal) {
-    this.message = message;
-  }
+  const StaticWarningCode.con1(String name, int ordinal, String message) : this.con2(name, ordinal, message, null);
 
   /**
    * Initialize a newly created error code to have the given message and correction.
    *
    * @param message the template used to create the message to be displayed for the error
    * @param correction the template used to create the correction to be displayed for the error
    */
-  StaticWarningCode.con2(String name, int ordinal, String message, String correction) : super(name, ordinal) {
-    this.message = message;
-    this.correction7 = correction;
-  }
-
-  @override
-  String get correction => correction7;
+  const StaticWarningCode.con2(String name, int ordinal, this.message, this.correction) : super(name, ordinal);
 
   @override
   ErrorSeverity get errorSeverity => ErrorType.STATIC_WARNING.severity;
 
   @override
   ErrorType get type => ErrorType.STATIC_WARNING;
 }
 
 /**
  * The interface `AnalysisErrorListener` defines the behavior of objects that listen for
@@ skipping 25 matching lines @@
  * caused the error to be generated and for the error message to explain what is wrong and, when
  * appropriate, how the problem can be corrected.
  */
 class HtmlWarningCode extends Enum<HtmlWarningCode> implements ErrorCode {
   /**
    * An error code indicating that the value of the 'src' attribute of a Dart script tag is not a
    * valid URI.
    *
    * @param uri the URI that is invalid
    */
-  static final HtmlWarningCode INVALID_URI = new HtmlWarningCode.con1('INVALID_URI', 0, "Invalid URI syntax: '%s'");
+  static const HtmlWarningCode INVALID_URI = const HtmlWarningCode.con1('INVALID_URI', 0, "Invalid URI syntax: '%s'");
 
   /**
    * An error code indicating that the value of the 'src' attribute of a Dart script tag references
    * a file that does not exist.
    *
    * @param uri the URI pointing to a non-existent file
    */
-  static final HtmlWarningCode URI_DOES_NOT_EXIST = new HtmlWarningCode.con1('URI_DOES_NOT_EXIST', 1, "Target of URI does not exist: '%s'");
+  static const HtmlWarningCode URI_DOES_NOT_EXIST = const HtmlWarningCode.con1('URI_DOES_NOT_EXIST', 1, "Target of URI does not exist: '%s'");
 
-  static final List<HtmlWarningCode> values = [INVALID_URI, URI_DOES_NOT_EXIST];
+  static const List<HtmlWarningCode> values = const [INVALID_URI, URI_DOES_NOT_EXIST];
 
   /**
    * The template used to create the message to be displayed for this error.
    */
-  String message;
+  final String message;
 
   /**
    * The template used to create the correction to be displayed for this error, or `null` if
    * there is no correction information for this error.
    */
-  String correction4;
+  final String correction;
 
   /**
    * Initialize a newly created error code to have the given message.
    *
    * @param message the message template used to create the message to be displayed for the error
    */
-  HtmlWarningCode.con1(String name, int ordinal, String message) : super(name, ordinal) {
-    this.message = message;
-  }
+  const HtmlWarningCode.con1(String name, int ordinal, String message) : this.con2(name, ordinal, message, null);
 
   /**
    * Initialize a newly created error code to have the given message and correction.
    *
    * @param message the template used to create the message to be displayed for the error
    * @param correction the template used to create the correction to be displayed for the error
    */
-  HtmlWarningCode.con2(String name, int ordinal, String message, String correction) : super(name, ordinal) {
-    this.message = message;
-    this.correction4 = correction;
-  }
-
-  @override
-  String get correction => correction4;
+  const HtmlWarningCode.con2(String name, int ordinal, this.message, this.correction) : super(name, ordinal);
 
   @override
   ErrorSeverity get errorSeverity => ErrorSeverity.WARNING;
 
   @override
   ErrorType get type => ErrorType.STATIC_WARNING;
 }
 
 /**
  * The enumeration `StaticTypeWarningCode` defines the error codes used for static type
  * warnings. The convention for this class is for the name of the error code to indicate the problem
  * that caused the error to be generated and for the error message to explain what is wrong and,
  * when appropriate, how the problem can be corrected.
  */
 class StaticTypeWarningCode extends Enum<StaticTypeWarningCode> implements ErrorCode {
   /**
    * 12.7 Lists: A fresh instance (7.6.1) <i>a</i>, of size <i>n</i>, whose class implements the
    * built-in class <i>List&lt;E></i> is allocated.
    *
    * @param numTypeArgument the number of provided type arguments
    */
-  static final StaticTypeWarningCode EXPECTED_ONE_LIST_TYPE_ARGUMENTS = new StaticTypeWarningCode.con1('EXPECTED_ONE_LIST_TYPE_ARGUMENTS', 0, "List literal requires exactly one type arguments or none, but %d found");
+  static const StaticTypeWarningCode EXPECTED_ONE_LIST_TYPE_ARGUMENTS = const StaticTypeWarningCode.con1('EXPECTED_ONE_LIST_TYPE_ARGUMENTS', 0, "List literal requires exactly one type arguments or none, but %d found");
 
   /**
    * 12.8 Maps: A fresh instance (7.6.1) <i>m</i>, of size <i>n</i>, whose class implements the
    * built-in class <i>Map&lt;K, V></i> is allocated.
    *
    * @param numTypeArgument the number of provided type arguments
    */
-  static final StaticTypeWarningCode EXPECTED_TWO_MAP_TYPE_ARGUMENTS = new StaticTypeWarningCode.con1('EXPECTED_TWO_MAP_TYPE_ARGUMENTS', 1, "Map literal requires exactly two type arguments or none, but %d found");
+  static const StaticTypeWarningCode EXPECTED_TWO_MAP_TYPE_ARGUMENTS = const StaticTypeWarningCode.con1('EXPECTED_TWO_MAP_TYPE_ARGUMENTS', 1, "Map literal requires exactly two type arguments or none, but %d found");
 
   /**
    * 12.18 Assignment: Let <i>T</i> be the static type of <i>e<sub>1</sub></i>. It is a static type
    * warning if <i>T</i> does not have an accessible instance setter named <i>v=</i>.
    *
    * @see #UNDEFINED_SETTER
    */
-  static final StaticTypeWarningCode INACCESSIBLE_SETTER = new StaticTypeWarningCode.con1('INACCESSIBLE_SETTER', 2, "");
+  static const StaticTypeWarningCode INACCESSIBLE_SETTER = const StaticTypeWarningCode.con1('INACCESSIBLE_SETTER', 2, "");
 
   /**
    * 8.1.1 Inheritance and Overriding: However, if there are multiple members <i>m<sub>1</sub>,
    * &hellip; m<sub>k</sub></i> with the same name <i>n</i> that would be inherited (because
    * identically named members existed in several superinterfaces) then at most one member is
    * inherited.
    *
    * If the static types <i>T<sub>1</sub>, &hellip;, T<sub>k</sub></i> of the members
    * <i>m<sub>1</sub>, &hellip;, m<sub>k</sub></i> are not identical, then there must be a member
    * <i>m<sub>x</sub></i> such that <i>T<sub>x</sub> &lt; T<sub>i</sub>, 1 &lt;= x &lt;= k</i> for
    * all <i>i, 1 &lt;= i &lt; k</i>, or a static type warning occurs. The member that is inherited
    * is <i>m<sub>x</sub></i>, if it exists; otherwise:
    * <ol>
    * * If all of <i>m<sub>1</sub>, &hellip; m<sub>k</sub></i> have the same number <i>r</i> of
    * required parameters and the same set of named parameters <i>s</i>, then let <i>h = max(
    * numberOfOptionalPositionals( m<sub>i</sub> ) ), 1 &lt;= i &lt;= k</i>. <i>I</i> has a method
    * named <i>n</i>, with <i>r</i> required parameters of type dynamic, <i>h</i> optional positional
    * parameters of type dynamic, named parameters <i>s</i> of type dynamic and return type dynamic.
    * * Otherwise none of the members <i>m<sub>1</sub>, &hellip;, m<sub>k</sub></i> is inherited.
    * </ol>
    */
-  static final StaticTypeWarningCode INCONSISTENT_METHOD_INHERITANCE = new StaticTypeWarningCode.con1('INCONSISTENT_METHOD_INHERITANCE', 3, "'%s' is inherited by at least two interfaces inconsistently, from %s");
+  static const StaticTypeWarningCode INCONSISTENT_METHOD_INHERITANCE = const StaticTypeWarningCode.con1('INCONSISTENT_METHOD_INHERITANCE', 3, "'%s' is inherited by at least two interfaces inconsistently, from %s");
 
   /**
    * 12.15.1 Ordinary Invocation: It is a static type warning if <i>T</i> does not have an
    * accessible (3.2) instance member named <i>m</i>.
    *
    * @param memberName the name of the static member
    * @see UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER
    */
-  static final StaticTypeWarningCode INSTANCE_ACCESS_TO_STATIC_MEMBER = new StaticTypeWarningCode.con1('INSTANCE_ACCESS_TO_STATIC_MEMBER', 4, "Static member '%s' cannot be accessed using instance access");
+  static const StaticTypeWarningCode INSTANCE_ACCESS_TO_STATIC_MEMBER = const StaticTypeWarningCode.con1('INSTANCE_ACCESS_TO_STATIC_MEMBER', 4, "Static member '%s' cannot be accessed using instance access");
 
   /**
    * 12.18 Assignment: It is a static type warning if the static type of <i>e</i> may not be
    * assigned to the static type of <i>v</i>. The static type of the expression <i>v = e</i> is the
    * static type of <i>e</i>.
    *
    * 12.18 Assignment: It is a static type warning if the static type of <i>e</i> may not be
    * assigned to the static type of <i>C.v</i>. The static type of the expression <i>C.v = e</i> is
    * the static type of <i>e</i>.
    *
    * 12.18 Assignment: Let <i>T</i> be the static type of <i>e<sub>1</sub></i>. It is a static type
    * warning if the static type of <i>e<sub>2</sub></i> may not be assigned to <i>T</i>.
    *
    * @param rhsTypeName the name of the right hand side type
    * @param lhsTypeName the name of the left hand side type
    */
-  static final StaticTypeWarningCode INVALID_ASSIGNMENT = new StaticTypeWarningCode.con1('INVALID_ASSIGNMENT', 5, "A value of type '%s' cannot be assigned to a variable of type '%s'");
+  static const StaticTypeWarningCode INVALID_ASSIGNMENT = const StaticTypeWarningCode.con1('INVALID_ASSIGNMENT', 5, "A value of type '%s' cannot be assigned to a variable of type '%s'");
 
   /**
    * 12.15.1 Ordinary Invocation: An ordinary method invocation <i>i</i> has the form
    * <i>o.m(a<sub>1</sub>, &hellip;, a<sub>n</sub>, x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;
    * x<sub>n+k</sub>: a<sub>n+k</sub>)</i>.
    *
    * Let <i>T</i> be the static type of <i>o</i>. It is a static type warning if <i>T</i> does not
    * have an accessible instance member named <i>m</i>. If <i>T.m</i> exists, it is a static warning
    * if the type <i>F</i> of <i>T.m</i> may not be assigned to a function type. If <i>T.m</i> does
    * not exist, or if <i>F</i> is not a function type, the static type of <i>i</i> is dynamic.
    *
    * 12.15.3 Static Invocation: It is a static type warning if the type <i>F</i> of <i>C.m</i> may
    * not be assigned to a function type.
    *
    * 12.15.4 Super Invocation: A super method invocation <i>i</i> has the form
    * <i>super.m(a<sub>1</sub>, &hellip;, a<sub>n</sub>, x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;
    * x<sub>n+k</sub>: a<sub>n+k</sub>)</i>. If <i>S.m</i> exists, it is a static warning if the type
    * <i>F</i> of <i>S.m</i> may not be assigned to a function type.
    *
    * @param nonFunctionIdentifier the name of the identifier that is not a function type
    */
-  static final StaticTypeWarningCode INVOCATION_OF_NON_FUNCTION = new StaticTypeWarningCode.con1('INVOCATION_OF_NON_FUNCTION', 6, "'%s' is not a method");
+  static const StaticTypeWarningCode INVOCATION_OF_NON_FUNCTION = const StaticTypeWarningCode.con1('INVOCATION_OF_NON_FUNCTION', 6, "'%s' is not a method");
 
   /**
    * 12.14.4 Function Expression Invocation: A function expression invocation <i>i</i> has the form
    * <i>e<sub>f</sub>(a<sub>1</sub>, &hellip; a<sub>n</sub>, x<sub>n+1</sub>: a<sub>n+1</sub>,
    * &hellip;, x<sub>n+k</sub>: a<sub>n+k</sub>)</i>, where <i>e<sub>f</sub></i> is an expression.
    *
    * It is a static type warning if the static type <i>F</i> of <i>e<sub>f</sub></i> may not be
    * assigned to a function type.
    */
-  static final StaticTypeWarningCode INVOCATION_OF_NON_FUNCTION_EXPRESSION = new StaticTypeWarningCode.con1('INVOCATION_OF_NON_FUNCTION_EXPRESSION', 7, "Cannot invoke a non-function");
+  static const StaticTypeWarningCode INVOCATION_OF_NON_FUNCTION_EXPRESSION = const StaticTypeWarningCode.con1('INVOCATION_OF_NON_FUNCTION_EXPRESSION', 7, "Cannot invoke a non-function");
 
   /**
    * 12.20 Conditional: It is a static type warning if the type of <i>e<sub>1</sub></i> may not be
    * assigned to bool.
    *
    * 13.5 If: It is a static type warning if the type of the expression <i>b</i> may not be assigned
    * to bool.
    *
    * 13.7 While: It is a static type warning if the type of <i>e</i> may not be assigned to bool.
    *
    * 13.8 Do: It is a static type warning if the type of <i>e</i> cannot be assigned to bool.
    */
-  static final StaticTypeWarningCode NON_BOOL_CONDITION = new StaticTypeWarningCode.con1('NON_BOOL_CONDITION', 8, "Conditions must have a static type of 'bool'");
+  static const StaticTypeWarningCode NON_BOOL_CONDITION = const StaticTypeWarningCode.con1('NON_BOOL_CONDITION', 8, "Conditions must have a static type of 'bool'");
 
   /**
    * 13.15 Assert: It is a static type warning if the type of <i>e</i> may not be assigned to either
    * bool or () &rarr; bool
    */
-  static final StaticTypeWarningCode NON_BOOL_EXPRESSION = new StaticTypeWarningCode.con1('NON_BOOL_EXPRESSION', 9, "Assertions must be on either a 'bool' or '() -> bool'");
+  static const StaticTypeWarningCode NON_BOOL_EXPRESSION = const StaticTypeWarningCode.con1('NON_BOOL_EXPRESSION', 9, "Assertions must be on either a 'bool' or '() -> bool'");
 
   /**
    * 12.28 Unary Expressions: The expression !<i>e</i> is equivalent to the expression
    * <i>e</i>?<b>false<b> : <b>true</b>.
    *
    * 12.20 Conditional: It is a static type warning if the type of <i>e<sub>1</sub></i> may not be
    * assigned to bool.
    */
-  static final StaticTypeWarningCode NON_BOOL_NEGATION_EXPRESSION = new StaticTypeWarningCode.con1('NON_BOOL_NEGATION_EXPRESSION', 10, "Negation argument must have a static type of 'bool'");
+  static const StaticTypeWarningCode NON_BOOL_NEGATION_EXPRESSION = const StaticTypeWarningCode.con1('NON_BOOL_NEGATION_EXPRESSION', 10, "Negation argument must have a static type of 'bool'");
 
   /**
    * 15.8 Parameterized Types: It is a static type warning if <i>A<sub>i</sub>, 1 &lt;= i &lt;=
    * n</i> does not denote a type in the enclosing lexical scope.
    */
-  static final StaticTypeWarningCode NON_TYPE_AS_TYPE_ARGUMENT = new StaticTypeWarningCode.con1('NON_TYPE_AS_TYPE_ARGUMENT', 11, "The name '%s' is not a type and cannot be used as a parameterized type");
+  static const StaticTypeWarningCode NON_TYPE_AS_TYPE_ARGUMENT = const StaticTypeWarningCode.con1('NON_TYPE_AS_TYPE_ARGUMENT', 11, "The name '%s' is not a type and cannot be used as a parameterized type");
 
   /**
    * 13.11 Return: It is a static type warning if the type of <i>e</i> may not be assigned to the
    * declared return type of the immediately enclosing function.
    *
    * @param actualReturnType the return type as declared in the return statement
    * @param expectedReturnType the expected return type as defined by the method
    * @param methodName the name of the method
    */
-  static final StaticTypeWarningCode RETURN_OF_INVALID_TYPE = new StaticTypeWarningCode.con1('RETURN_OF_INVALID_TYPE', 12, "The return type '%s' is not a '%s', as defined by the method '%s'");
+  static const StaticTypeWarningCode RETURN_OF_INVALID_TYPE = const StaticTypeWarningCode.con1('RETURN_OF_INVALID_TYPE', 12, "The return type '%s' is not a '%s', as defined by the method '%s'");
 
   /**
    * 12.11 Instance Creation: It is a static type warning if any of the type arguments to a
    * constructor of a generic type <i>G</i> invoked by a new expression or a constant object
    * expression are not subtypes of the bounds of the corresponding formal type parameters of
    * <i>G</i>.
    *
    * 15.8 Parameterized Types: If <i>S</i> is the static type of a member <i>m</i> of <i>G</i>, then
    * the static type of the member <i>m</i> of <i>G&lt;A<sub>1</sub>, &hellip; A<sub>n</sub>&gt;</i>
    * is <i>[A<sub>1</sub>, &hellip;, A<sub>n</sub>/T<sub>1</sub>, &hellip;, T<sub>n</sub>]S</i>
    * where <i>T<sub>1</sub>, &hellip; T<sub>n</sub></i> are the formal type parameters of <i>G</i>.
    * Let <i>B<sub>i</sub></i> be the bounds of <i>T<sub>i</sub>, 1 &lt;= i &lt;= n</i>. It is a
    * static type warning if <i>A<sub>i</sub></i> is not a subtype of <i>[A<sub>1</sub>, &hellip;,
    * A<sub>n</sub>/T<sub>1</sub>, &hellip;, T<sub>n</sub>]B<sub>i</sub>, 1 &lt;= i &lt;= n</i>.
    *
    * 7.6.2 Factories: It is a static type warning if any of the type arguments to <i>k'</i> are not
    * subtypes of the bounds of the corresponding formal type parameters of type.
    *
    * @param boundedTypeName the name of the type used in the instance creation that should be
    *          limited by the bound as specified in the class declaration
    * @param boundingTypeName the name of the bounding type
    * @see #TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND
    */
-  static final StaticTypeWarningCode TYPE_ARGUMENT_NOT_MATCHING_BOUNDS = new StaticTypeWarningCode.con1('TYPE_ARGUMENT_NOT_MATCHING_BOUNDS', 13, "'%s' does not extend '%s'");
+  static const StaticTypeWarningCode TYPE_ARGUMENT_NOT_MATCHING_BOUNDS = const StaticTypeWarningCode.con1('TYPE_ARGUMENT_NOT_MATCHING_BOUNDS', 13, "'%s' does not extend '%s'");
 
   /**
    * 10 Generics: It is a static type warning if a type parameter is a supertype of its upper bound.
    *
    * @param typeParameterName the name of the type parameter
    * @see #TYPE_ARGUMENT_NOT_MATCHING_BOUNDS
    */
-  static final StaticTypeWarningCode TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND = new StaticTypeWarningCode.con1('TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND', 14, "'%s' cannot be a supertype of its upper bound");
+  static const StaticTypeWarningCode TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND = const StaticTypeWarningCode.con1('TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND', 14, "'%s' cannot be a supertype of its upper bound");
 
   /**
    * 12.17 Getter Invocation: Let <i>T</i> be the static type of <i>e</i>. It is a static type
    * warning if <i>T</i> does not have a getter named <i>m</i>.
    *
    * @param getterName the name of the getter
    * @param enclosingType the name of the enclosing type where the getter is being looked for
    */
-  static final StaticTypeWarningCode UNDEFINED_GETTER = new StaticTypeWarningCode.con1('UNDEFINED_GETTER', 15, "There is no such getter '%s' in '%s'");
+  static const StaticTypeWarningCode UNDEFINED_GETTER = const StaticTypeWarningCode.con1('UNDEFINED_GETTER', 15, "There is no such getter '%s' in '%s'");
 
   /**
    * 12.15.1 Ordinary Invocation: Let <i>T</i> be the static type of <i>o</i>. It is a static type
    * warning if <i>T</i> does not have an accessible instance member named <i>m</i>.
    *
    * @param methodName the name of the method that is undefined
    * @param typeName the resolved type name that the method lookup is happening on
    */
-  static final StaticTypeWarningCode UNDEFINED_METHOD = new StaticTypeWarningCode.con1('UNDEFINED_METHOD', 16, "The method '%s' is not defined for the class '%s'");
+  static const StaticTypeWarningCode UNDEFINED_METHOD = const StaticTypeWarningCode.con1('UNDEFINED_METHOD', 16, "The method '%s' is not defined for the class '%s'");
 
   /**
    * 12.18 Assignment: Evaluation of an assignment of the form
    * <i>e<sub>1</sub></i>[<i>e<sub>2</sub></i>] = <i>e<sub>3</sub></i> is equivalent to the
    * evaluation of the expression (a, i, e){a.[]=(i, e); return e;} (<i>e<sub>1</sub></i>,
    * <i>e<sub>2</sub></i>, <i>e<sub>2</sub></i>).
    *
    * 12.29 Assignable Expressions: An assignable expression of the form
    * <i>e<sub>1</sub></i>[<i>e<sub>2</sub></i>] is evaluated as a method invocation of the operator
    * method [] on <i>e<sub>1</sub></i> with argument <i>e<sub>2</sub></i>.
    *
    * 12.15.1 Ordinary Invocation: Let <i>T</i> be the static type of <i>o</i>. It is a static type
    * warning if <i>T</i> does not have an accessible instance member named <i>m</i>.
    *
    * @param operator the name of the operator
    * @param enclosingType the name of the enclosing type where the operator is being looked for
    */
-  static final StaticTypeWarningCode UNDEFINED_OPERATOR = new StaticTypeWarningCode.con1('UNDEFINED_OPERATOR', 17, "There is no such operator '%s' in '%s'");
+  static const StaticTypeWarningCode UNDEFINED_OPERATOR = const StaticTypeWarningCode.con1('UNDEFINED_OPERATOR', 17, "There is no such operator '%s' in '%s'");
 
   /**
    * 12.18 Assignment: Let <i>T</i> be the static type of <i>e<sub>1</sub></i>. It is a static type
    * warning if <i>T</i> does not have an accessible instance setter named <i>v=</i>.
    *
    * @param setterName the name of the setter
    * @param enclosingType the name of the enclosing type where the setter is being looked for
    * @see #INACCESSIBLE_SETTER
    */
-  static final StaticTypeWarningCode UNDEFINED_SETTER = new StaticTypeWarningCode.con1('UNDEFINED_SETTER', 18, "There is no such setter '%s' in '%s'");
+  static const StaticTypeWarningCode UNDEFINED_SETTER = const StaticTypeWarningCode.con1('UNDEFINED_SETTER', 18, "There is no such setter '%s' in '%s'");
 
   /**
    * 12.15.4 Super Invocation: A super method invocation <i>i</i> has the form
    * <i>super.m(a<sub>1</sub>, &hellip;, a<sub>n</sub>, x<sub>n+1</sub>: a<sub>n+1</sub>, &hellip;
    * x<sub>n+k</sub>: a<sub>n+k</sub>)</i>. It is a static type warning if <i>S</i> does not have an
    * accessible instance member named <i>m</i>.
    *
    * @param methodName the name of the method that is undefined
    * @param typeName the resolved type name that the method lookup is happening on
    */
-  static final StaticTypeWarningCode UNDEFINED_SUPER_METHOD = new StaticTypeWarningCode.con1('UNDEFINED_SUPER_METHOD', 19, "There is no such method '%s' in '%s'");
+  static const StaticTypeWarningCode UNDEFINED_SUPER_METHOD = const StaticTypeWarningCode.con1('UNDEFINED_SUPER_METHOD', 19, "There is no such method '%s' in '%s'");
 
   /**
    * 12.15.1 Ordinary Invocation: It is a static type warning if <i>T</i> does not have an
    * accessible (3.2) instance member named <i>m</i>.
    *
    * This is a specialization of [INSTANCE_ACCESS_TO_STATIC_MEMBER] that is used when we are
    * able to find the name defined in a supertype. It exists to provide a more informative error
    * message.
    */
-  static final StaticTypeWarningCode UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER = new StaticTypeWarningCode.con1('UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER', 20, "Static members from supertypes must be qualified by the name of the defining type");
+  static const StaticTypeWarningCode UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER = const StaticTypeWarningCode.con1('UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER', 20, "Static members from supertypes must be qualified by the name of the defining type");
 
   /**
    * 15.8 Parameterized Types: It is a static type warning if <i>G</i> is not a generic type with
    * exactly <i>n</i> type parameters.
    *
    * @param typeName the name of the type being referenced (<i>G</i>)
    * @param parameterCount the number of type parameters that were declared
    * @param argumentCount the number of type arguments provided
    * @see CompileTimeErrorCode#CONST_WITH_INVALID_TYPE_PARAMETERS
    * @see CompileTimeErrorCode#NEW_WITH_INVALID_TYPE_PARAMETERS
    */
-  static final StaticTypeWarningCode WRONG_NUMBER_OF_TYPE_ARGUMENTS = new StaticTypeWarningCode.con1('WRONG_NUMBER_OF_TYPE_ARGUMENTS', 21, "The type '%s' is declared with %d type parameters, but %d type arguments were given");
+  static const StaticTypeWarningCode WRONG_NUMBER_OF_TYPE_ARGUMENTS = const StaticTypeWarningCode.con1('WRONG_NUMBER_OF_TYPE_ARGUMENTS', 21, "The type '%s' is declared with %d type parameters, but %d type arguments were given");
 
-  static final List<StaticTypeWarningCode> values = [
+  static const List<StaticTypeWarningCode> values = const [
       EXPECTED_ONE_LIST_TYPE_ARGUMENTS,
       EXPECTED_TWO_MAP_TYPE_ARGUMENTS,
       INACCESSIBLE_SETTER,
       INCONSISTENT_METHOD_INHERITANCE,
       INSTANCE_ACCESS_TO_STATIC_MEMBER,
       INVALID_ASSIGNMENT,
       INVOCATION_OF_NON_FUNCTION,
       INVOCATION_OF_NON_FUNCTION_EXPRESSION,
       NON_BOOL_CONDITION,
       NON_BOOL_EXPRESSION,
       NON_BOOL_NEGATION_EXPRESSION,
       NON_TYPE_AS_TYPE_ARGUMENT,
       RETURN_OF_INVALID_TYPE,
       TYPE_ARGUMENT_NOT_MATCHING_BOUNDS,
       TYPE_PARAMETER_SUPERTYPE_OF_ITS_BOUND,
       UNDEFINED_GETTER,
       UNDEFINED_METHOD,
       UNDEFINED_OPERATOR,
       UNDEFINED_SETTER,
       UNDEFINED_SUPER_METHOD,
       UNQUALIFIED_REFERENCE_TO_NON_LOCAL_STATIC_MEMBER,
       WRONG_NUMBER_OF_TYPE_ARGUMENTS];
 
   /**
    * The template used to create the message to be displayed for this error.
    */
-  String message;
+  final String message;
 
   /**
    * The template used to create the correction to be displayed for this error, or `null` if
    * there is no correction information for this error.
    */
-  String correction6;
+  final String correction;
 
   /**
    * Initialize a newly created error code to have the given message.
    *
    * @param message the message template used to create the message to be displayed for the error
    */
-  StaticTypeWarningCode.con1(String name, int ordinal, String message) : super(name, ordinal) {
-    this.message = message;
-  }
+  const StaticTypeWarningCode.con1(String name, int ordinal, String message) : this.con2(name, ordinal, message, null);
 
   /**
    * Initialize a newly created error code to have the given message and correction.
    *
    * @param message the template used to create the message to be displayed for the error
    * @param correction the template used to create the correction to be displayed for the error
    */
-  StaticTypeWarningCode.con2(String name, int ordinal, String message, String correction) : super(name, ordinal) {
-    this.message = message;
-    this.correction6 = correction;
-  }
-
-  @override
-  String get correction => correction6;
+  const StaticTypeWarningCode.con2(String name, int ordinal, this.message, this.correction) : super(name, ordinal);
 
   @override
   ErrorSeverity get errorSeverity => ErrorType.STATIC_TYPE_WARNING.severity;
 
   @override
   ErrorType get type => ErrorType.STATIC_TYPE_WARNING;
 }