Create a new AstFactory class to be used by analyzer and its clients.

pkg/analyzer/lib/src/dart/ast/ast.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.
 
 library analyzer.src.dart.ast.ast;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer/dart/ast/comment_type.dart';
 import 'package:analyzer/dart/ast/syntactic_entity.dart';
 import 'package:analyzer/dart/ast/token.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
 import 'package:analyzer/exception/exception.dart';
 import 'package:analyzer/src/dart/ast/token.dart';
 import 'package:analyzer/src/dart/ast/utilities.dart';
 import 'package:analyzer/src/dart/element/element.dart';
 import 'package:analyzer/src/dart/element/type.dart';
 import 'package:analyzer/src/generated/engine.dart' show AnalysisEngine;
 import 'package:analyzer/src/generated/java_engine.dart';
 import 'package:analyzer/src/generated/parser.dart';
 import 'package:analyzer/src/generated/source.dart' show LineInfo, Source;
 import 'package:analyzer/src/generated/utilities_dart.dart';
 
+export 'package:analyzer/dart/ast/comment_type.dart' show CommentType;
+export 'package:analyzer/src/dart/ast/uri_validation_code.dart' show UriValidationCodeImpl;
+
 /**
  * Two or more string literals that are implicitly concatenated because of being
  * adjacent (separated only by whitespace).
  *
  * While the grammar only allows adjacent strings when all of the strings are of
  * the same kind (single line or multi-line), this class doesn't enforce that
  * restriction.
  *
  *    adjacentStrings ::=
  *        [StringLiteral] [StringLiteral]+
@@ skipping 2294 matching lines @@
   dynamic/*=E*/ accept/*<E>*/(AstVisitor/*<E>*/ visitor) =>
       visitor.visitCommentReference(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     _identifier?.accept(visitor);
   }
 }
 
 /**
- * The possible types of comments that are recognized by the parser.
- */
-class CommentType {
-  /**
-   * A block comment.
-   */
-  static const CommentType BLOCK = const CommentType('BLOCK');
-
-  /**
-   * A documentation comment.
-   */
-  static const CommentType DOCUMENTATION = const CommentType('DOCUMENTATION');
-
-  /**
-   * An end-of-line comment.
-   */
-  static const CommentType END_OF_LINE = const CommentType('END_OF_LINE');
-
-  /**
-   * The name of the comment type.
-   */
-  final String name;
-
-  /**
-   * Initialize a newly created comment type to have the given [name].
-   */
-  const CommentType(this.name);
-
-  @override
-  String toString() => name;
-}
-
-/**
  * A compilation unit.
  *
  * While the grammar restricts the order of the directives and declarations
  * within a compilation unit, this class does not enforce those restrictions.
  * In particular, the children of a compilation unit will be visited in lexical
  * order even if lexical order does not conform to the restrictions of the
  * grammar.
  *
  *    compilationUnit ::=
  *        directives declarations
@@ skipping 8319 matching lines @@
       return UriValidationCode.INVALID_URI;
     }
     if (uri.path.isEmpty) {
       return UriValidationCode.INVALID_URI;
     }
     return null;
   }
 }
 
 /**
- * Validation codes returned by [UriBasedDirective.validate].
- */
-class UriValidationCodeImpl implements UriValidationCode {
-  static const UriValidationCode INVALID_URI =
-      const UriValidationCodeImpl('INVALID_URI');
-
-  static const UriValidationCode URI_WITH_INTERPOLATION =
-      const UriValidationCodeImpl('URI_WITH_INTERPOLATION');
-
-  static const UriValidationCode URI_WITH_DART_EXT_SCHEME =
-      const UriValidationCodeImpl('URI_WITH_DART_EXT_SCHEME');
-
-  /**
-   * The name of the validation code.
-   */
-  final String name;
-
-  /**
-   * Initialize a newly created validation code to have the given [name].
-   */
-  const UriValidationCodeImpl(this.name);
-
-  @override
-  String toString() => name;
-}
-
-/**
  * An identifier that has an initial value associated with it. Instances of this
  * class are always children of the class [VariableDeclarationList].
  *
  *    variableDeclaration ::=
  *        [SimpleIdentifier] ('=' [Expression])?
  *
  * TODO(paulberry): the grammar does not allow metadata to be associated with
  * a VariableDeclaration, and currently we don't record comments for it either.
  * Consider changing the class hierarchy so that [VariableDeclaration] does not
  * extend [Declaration].
@@ skipping 450 matching lines @@
 
   @override
   dynamic/*=E*/ accept/*<E>*/(AstVisitor/*<E>*/ visitor) =>
       visitor.visitYieldStatement(this);
 
   @override
   void visitChildren(AstVisitor visitor) {
     _expression?.accept(visitor);
   }
 }