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runtime/lib/errors_patch.dart

 // Copyright (c) 2012, 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.
 
-@patch class Error {
-  @patch static String _objectToString(Object object) {
+@patch
+class Error {
+  @patch
+  static String _objectToString(Object object) {
     return Object._toString(object);
   }
 
-  @patch static String _stringToSafeString(String string) {
+  @patch
+  static String _stringToSafeString(String string) {
     return JSON.encode(string);
   }
 
-  @patch StackTrace get stackTrace => _stackTrace;
+  @patch
+  StackTrace get stackTrace => _stackTrace;
 
   StackTrace _stackTrace;
 }
 
 class _AssertionError extends Error implements AssertionError {
   _AssertionError._create(
-      this._failedAssertion, this._url, this._line, this._column,
-      this.message);
-
+      this._failedAssertion, this._url, this._line, this._column, this.message);
 
   // AssertionError_throwNew in errors.cc fishes the assertion source code
   // out of the script. It expects a Dart stack frame from class
   // _AssertionError. Thus we need a Dart stub that calls the native code.
   static _throwNew(int assertionStart, int assertionEnd, Object message) {
     _doThrowNew(assertionStart, assertionEnd, message);
   }
 
   static _doThrowNew(int assertionStart, int assertionEnd, Object message)
-    native "AssertionError_throwNew";
+      native "AssertionError_throwNew";
 
   static _evaluateAssertion(condition) {
     if (identical(condition, true) || identical(condition, false)) {
       return condition;
     }
     if (condition is _Closure) {
       return condition();
     }
     if (condition is Function) {
       condition = condition();
@@ skipping 13 matching lines @@
       return "'$_failedAssertion': $_messageString";
     }
     var columnInfo = "";
     if (_column > 0) {
       // Only add column information if it is valid.
       columnInfo = " pos $_column";
     }
     return "'$_url': Failed assertion: line $_line$columnInfo: "
         "'$_failedAssertion': $_messageString";
   }
+
   final String _failedAssertion;
   final String _url;
   final int _line;
   final int _column;
   final Object message;
 }
 
 class _TypeError extends _AssertionError implements TypeError {
   _TypeError._create(String url, int line, int column, String errorMsg)
       : super._create("is assignable", url, line, column, errorMsg);
 
-  static _throwNew(int location,
-                   Object src_value,
-                   _Type dst_type,
-                   String dst_name,
-                   String bound_error_msg)
-      native "TypeError_throwNew";
+  static _throwNew(int location, Object src_value, _Type dst_type,
+      String dst_name, String bound_error_msg) native "TypeError_throwNew";
 
-  static _throwNewIfNotLoaded(_LibraryPrefix prefix,
-                              int location,
-                              Object src_value,
-                              _Type dst_type,
-                              String dst_name,
-                              String bound_error_msg) {
+  static _throwNewIfNotLoaded(
+      _LibraryPrefix prefix,
+      int location,
+      Object src_value,
+      _Type dst_type,
+      String dst_name,
+      String bound_error_msg) {
     if (!prefix.isLoaded()) {
       _throwNew(location, src_value, dst_type, dst_name, bound_error_msg);
     }
   }
 
   String toString() => super.message;
 }
 
 class _CastError extends Error implements CastError {
   _CastError._create(this._url, this._line, this._column, this._errorMsg);
 
   // A CastError is allocated by TypeError._throwNew() when dst_name equals
   // Symbols::InTypeCast().
 
   String toString() => _errorMsg;
 
   // Fields _url, _line, and _column are only used for debugging purposes.
   final String _url;
   final int _line;
   final int _column;
   final String _errorMsg;
 }
 
-@patch class FallThroughError {
+@patch
+class FallThroughError {
   FallThroughError._create(this._url, this._line);
 
   static _throwNew(int case_clause_pos) native "FallThroughError_throwNew";
 
   @patch
   String toString() {
     return "'$_url': Switch case fall-through at line $_line.";
   }
 
   // These new fields cannot be declared final, because a constructor exists
   // in the original version of this patched class.
   String _url;
   int _line;
 }
 
 class _InternalError {
   const _InternalError(this._msg);
   String toString() => "InternalError: '${_msg}'";
   final String _msg;
 }
 
-@patch class UnsupportedError {
+@patch
+class UnsupportedError {
   static _throwNew(String msg) {
     throw new UnsupportedError(msg);
   }
 }
 
-@patch class CyclicInitializationError {
+@patch
+class CyclicInitializationError {
   static _throwNew(String variableName) {
     throw new CyclicInitializationError(variableName);
   }
 }
 
-@patch class AbstractClassInstantiationError {
+@patch
+class AbstractClassInstantiationError {
   AbstractClassInstantiationError._create(
       this._className, this._url, this._line);
 
   static _throwNew(int case_clause_pos, String className)
       native "AbstractClassInstantiationError_throwNew";
 
-  @patch String toString() {
+  @patch
+  String toString() {
     return "Cannot instantiate abstract class $_className: "
-           "_url '$_url' line $_line";
+        "_url '$_url' line $_line";
   }
 
   // These new fields cannot be declared final, because a constructor exists
   // in the original version of this patched class.
   String _url;
   int _line;
 }
 
-@patch class NoSuchMethodError {
+@patch
+class NoSuchMethodError {
   // The compiler emits a call to _throwNew when it cannot resolve a static
   // method at compile time. The receiver is actually the literal class of the
   // unresolved method.
-  static void _throwNew(Object receiver,
-                        String memberName,
-                        int invocation_type,
-                        List arguments,
-                        List argumentNames,
-                        List existingArgumentNames) {
+  static void _throwNew(Object receiver, String memberName, int invocation_type,
+      List arguments, List argumentNames, List existingArgumentNames) {
     int numNamedArguments = argumentNames == null ? 0 : argumentNames.length;
     int numPositionalArguments = arguments == null ? 0 : arguments.length;
     numPositionalArguments -= numNamedArguments;
     List positionalArguments;
     if (numPositionalArguments > 0) {
       // TODO(srdjan): Unresolvable static methods sometimes do not provide the
       // arguments, because the arguments are evaluated but not passed to the
       // throwing stub (see EffectGraphVisitor::BuildThrowNoSuchMethodError and
       // Parser::ThrowNoSuchMethodError)). There is no way to distinguish the
       // case of no arguments from the case of the arguments not being passed
       // in here, though. See https://github.com/dart-lang/sdk/issues/27572
       positionalArguments = arguments.sublist(0, numPositionalArguments);
     }
     Map<Symbol, dynamic> namedArguments = new Map<Symbol, dynamic>();
     for (int i = 0; i < numNamedArguments; i++) {
       var arg_value = arguments[numPositionalArguments + i];
       namedArguments[new Symbol(argumentNames[i])] = arg_value;
     }
-    throw new NoSuchMethodError._withType(receiver,
-                                          new Symbol(memberName),
-                                          invocation_type,
-                                          positionalArguments,
-                                          namedArguments,
-                                          existingArgumentNames);
+    throw new NoSuchMethodError._withType(
+        receiver,
+        new Symbol(memberName),
+        invocation_type,
+        positionalArguments,
+        namedArguments,
+        existingArgumentNames);
   }
 
-  static void _throwNewIfNotLoaded(_LibraryPrefix prefix,
-                                   Object receiver,
-                                   String memberName,
-                                   int invocation_type,
-                                   List arguments,
-                                   List argumentNames,
-                                   List existingArgumentNames) {
+  static void _throwNewIfNotLoaded(
+      _LibraryPrefix prefix,
+      Object receiver,
+      String memberName,
+      int invocation_type,
+      List arguments,
+      List argumentNames,
+      List existingArgumentNames) {
     if (!prefix.isLoaded()) {
-      _throwNew(receiver, memberName, invocation_type, arguments,
-                argumentNames, existingArgumentNames);
+      _throwNew(receiver, memberName, invocation_type, arguments, argumentNames,
+          existingArgumentNames);
     }
   }
 
   // Remember the type from the invocation mirror or static compilation
   // analysis when thrown directly with _throwNew. A negative value means
   // that no information is available.
   final int _invocation_type;
 
   @patch
-  NoSuchMethodError(Object receiver,
-                    Symbol memberName,
-                    List positionalArguments,
-                    Map<Symbol, dynamic> namedArguments,
-                    [List existingArgumentNames = null])
+  NoSuchMethodError(Object receiver, Symbol memberName,
+      List positionalArguments, Map<Symbol, dynamic> namedArguments,
+      [List existingArgumentNames = null])
       : _receiver = receiver,
         _memberName = memberName,
         _arguments = positionalArguments,
         _namedArguments = namedArguments,
         _existingArgumentNames = existingArgumentNames,
         _invocation_type = -1;
 
   // This constructor seems to be called with either strings or
   // values read from another NoSuchMethodError.
-  NoSuchMethodError._withType(this._receiver,
-                              /*String|Symbol*/ memberName,
-                              this._invocation_type,
-                              this._arguments,
-                              Map<dynamic, dynamic> namedArguments,
-                              [List existingArgumentNames = null])
+  NoSuchMethodError._withType(
+      this._receiver,
+      /*String|Symbol*/ memberName,
+      this._invocation_type,
+      this._arguments,
+      Map<dynamic, dynamic> namedArguments,
+      [List existingArgumentNames = null])
       : this._memberName =
             (memberName is String) ? new Symbol(memberName) : memberName,
-        this._namedArguments =
-            (namedArguments == null)
-                ? null
-                : new Map<Symbol, dynamic>.fromIterable(
-                    namedArguments.keys,
-                    key: (k) => (k is String) ? new Symbol(k) : k,
-                    value: (k) => namedArguments[k]),
+        this._namedArguments = (namedArguments == null)
+            ? null
+            : new Map<Symbol, dynamic>.fromIterable(namedArguments.keys,
+                key: (k) => (k is String) ? new Symbol(k) : k,
+                value: (k) => namedArguments[k]),
         this._existingArgumentNames = existingArgumentNames;
 
-  @patch String toString() {
+  @patch
+  String toString() {
     var level = (_invocation_type >> _InvocationMirror._CALL_SHIFT) &
         _InvocationMirror._CALL_MASK;
     var type = _invocation_type & _InvocationMirror._TYPE_MASK;
-    String memberName = (_memberName == null) ? "" :
-        internal.Symbol.getUnmangledName(_memberName);
+    String memberName = (_memberName == null)
+        ? ""
+        : internal.Symbol.getUnmangledName(_memberName);
 
     if (type == _InvocationMirror._LOCAL_VAR) {
       return "NoSuchMethodError: Cannot assign to final variable '$memberName'";
     }
 
     StringBuffer arguments = new StringBuffer();
     int argumentCount = 0;
     if (_arguments != null) {
       for (; argumentCount < _arguments.length; argumentCount++) {
         if (argumentCount > 0) {
@@ skipping 11 matching lines @@
         arguments.write(": ");
         arguments.write(Error.safeToString(value));
         argumentCount++;
       });
     }
     bool args_mismatch = _existingArgumentNames != null;
     String args_message = args_mismatch ? " with matching arguments" : "";
 
     String type_str;
     if (type >= 0 && type < 5) {
-      type_str = (const ["method", "getter", "setter", "getter or setter",
-          "variable"])[type];
+      type_str = (const [
+        "method",
+        "getter",
+        "setter",
+        "getter or setter",
+        "variable"
+      ])[type];
     }
 
     StringBuffer msg_buf = new StringBuffer("NoSuchMethodError: ");
     bool is_type_call = false;
     switch (level) {
-      case _InvocationMirror._DYNAMIC: {
-        if (_receiver == null) {
-          if (args_mismatch) {
-            msg_buf.writeln("The null object does not have a $type_str "
-                "'$memberName'$args_message.");
+      case _InvocationMirror._DYNAMIC:
+        {
+          if (_receiver == null) {
+            if (args_mismatch) {
+              msg_buf.writeln("The null object does not have a $type_str "
+                  "'$memberName'$args_message.");
+            } else {
+              msg_buf
+                  .writeln("The $type_str '$memberName' was called on null.");
+            }
           } else {
-            msg_buf.writeln("The $type_str '$memberName' was called on null.");
+            if (_receiver is Function) {
+              msg_buf.writeln("Closure call with mismatched arguments: "
+                  "function '$memberName'");
+            } else if (_receiver is _Type && memberName == "call") {
+              is_type_call = true;
+              String name = _receiver.toString();
+              msg_buf.writeln("Attempted to use type '$name' as a function. "
+                  "Since types do not define a method 'call', this is not "
+                  "possible. Did you intend to call the $name constructor and "
+                  "forget the 'new' operator?");
+            } else {
+              msg_buf
+                  .writeln("Class '${_receiver.runtimeType}' has no instance "
+                      "$type_str '$memberName'$args_message.");
+            }
           }
-        } else {
-          if (_receiver is Function) {
-            msg_buf.writeln("Closure call with mismatched arguments: "
-                "function '$memberName'");
-          } else if (_receiver is _Type && memberName == "call") {
-            is_type_call = true;
-            String name = _receiver.toString();
-            msg_buf.writeln("Attempted to use type '$name' as a function. "
-                "Since types do not define a method 'call', this is not "
-                "possible. Did you intend to call the $name constructor and "
-                "forget the 'new' operator?");
-          } else {
-            msg_buf.writeln("Class '${_receiver.runtimeType}' has no instance "
-                "$type_str '$memberName'$args_message.");
-          }
+          break;
         }
-        break;
-      }
-      case _InvocationMirror._SUPER: {
-        msg_buf.writeln("Super class of class '${_receiver.runtimeType}' has "
+      case _InvocationMirror._SUPER:
+        {
+          msg_buf.writeln("Super class of class '${_receiver.runtimeType}' has "
               "no instance $type_str '$memberName'$args_message.");
-        memberName = "super.$memberName";
-        break;
-      }
-      case _InvocationMirror._STATIC: {
-        msg_buf.writeln("No static $type_str '$memberName'$args_message "
-            "declared in class '$_receiver'.");
-        break;
-      }
-      case _InvocationMirror._CONSTRUCTOR: {
-        msg_buf.writeln("No constructor '$memberName'$args_message declared "
-            "in class '$_receiver'.");
-        memberName = "new $memberName";
-        break;
-      }
-      case _InvocationMirror._TOP_LEVEL: {
-        msg_buf.writeln("No top-level $type_str '$memberName'$args_message "
-            "declared.");
-        break;
-      }
+          memberName = "super.$memberName";
+          break;
+        }
+      case _InvocationMirror._STATIC:
+        {
+          msg_buf.writeln("No static $type_str '$memberName'$args_message "
+              "declared in class '$_receiver'.");
+          break;
+        }
+      case _InvocationMirror._CONSTRUCTOR:
+        {
+          msg_buf.writeln("No constructor '$memberName'$args_message declared "
+              "in class '$_receiver'.");
+          memberName = "new $memberName";
+          break;
+        }
+      case _InvocationMirror._TOP_LEVEL:
+        {
+          msg_buf.writeln("No top-level $type_str '$memberName'$args_message "
+              "declared.");
+          break;
+        }
     }
 
     if (level == _InvocationMirror._TOP_LEVEL) {
       msg_buf.writeln("Receiver: top-level");
     } else {
       msg_buf.writeln("Receiver: ${Error.safeToString(_receiver)}");
     }
 
     if (type == _InvocationMirror._METHOD) {
       String m = is_type_call ? "$_receiver" : "$memberName";
@@ skipping 14 matching lines @@
         }
         formalParameters.write(_existingArgumentNames[i]);
       }
       msg_buf.write("\nFound: $memberName($formalParameters)");
     }
 
     return msg_buf.toString();
   }
 }
 
-
 class _CompileTimeError extends Error {
   final String _errorMsg;
   _CompileTimeError(this._errorMsg);
   String toString() => _errorMsg;
 }