integrating fasta parser

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

+// Copyright (c) 2017, 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.
+
+part of analyzer.parser;
+
+class _Builder implements Builder {
+  noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
+}
+
+class _ElementStore implements ElementStore {
+  noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
+}
+
+class _KernelLibraryBuilder implements KernelLibraryBuilder {
+  @override
+  final uri;
+
+  _KernelLibraryBuilder(this.uri);
+
+  @override
+  Uri get fileUri => uri;
+
+  noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
+}
+
+/**
+ * Replacement parser based on Fasta.
+ */
+class _Parser2 implements Parser {
+  @override
+  Token currentToken;
+
+  /**
+   * The builder which creates the analyzer AST data structures
+   * based on the Fasta parser.
+   */
+  final AstBuilder _astBuilder;
+
+  /**
+   * The error listener that will be informed of any errors that are found
+   * during the parse.
+   */
+  final AnalysisErrorListener _errorListener;
+
+  /**
+   * The fasta parser being wrapped.
+   */
+  final fasta.Parser _fastaParser;
+
+  /**
+   * The source being parsed.
+   */
+  final Source _source;
+
+  factory _Parser2(Source source, AnalysisErrorListener errorListener) {
+    var errorReporter = new ErrorReporter(errorListener, source);
+    var library = new _KernelLibraryBuilder(source.uri);
+    var member = new _Builder();
+    var elementStore = new _ElementStore();
+    var scope = new Scope.top(isModifiable: true);
+
+    AstBuilder astBuilder = new AstBuilder(
+        errorReporter, library, member, elementStore, scope, true);
+    fasta.Parser fastaParser = new fasta.Parser(astBuilder);
+    astBuilder.parser = fastaParser;
+    return new _Parser2._(source, errorListener, fastaParser, astBuilder);
+  }
+
+  _Parser2._(
+      this._source, this._errorListener, this._fastaParser, this._astBuilder);
+
+  @override
+  bool get parseGenericMethodComments => _astBuilder.parseGenericMethodComments;
+
+  @override
+  set parseGenericMethodComments(bool value) {
+    _astBuilder.parseGenericMethodComments = value;
+  }
+
+  @override
+  CompilationUnit parseCompilationUnit(Token token) {
+    currentToken = token;
+    return parseCompilationUnit2();
+  }
+
+  @override
+  CompilationUnit parseCompilationUnit2() {
+    currentToken = _fastaParser.parseUnit(currentToken);
+    return _astBuilder.pop();
+  }
+
+  noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
+}