Improve handling of built-in identifiers.

dart/lib/compiler/implementation/scanner/keyword.dart

 // Copyright (c) 2011, 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.
 
 /**
  * A keyword in the Dart programming language.
  */
 class Keyword implements SourceString {
-  static const Keyword BREAK = const Keyword("break");
-  static const Keyword CASE = const Keyword("case");
-  static const Keyword CATCH = const Keyword("catch");
-  static const Keyword CLASS = const Keyword("class");
-  static const Keyword CONST = const Keyword("const");
-  static const Keyword CONTINUE = const Keyword("continue");
-  static const Keyword DEFAULT = const Keyword("default");
-  static const Keyword DO = const Keyword("do");
-  static const Keyword ELSE = const Keyword("else");
-  static const Keyword EXTENDS = const Keyword("extends");
-  static const Keyword FALSE = const Keyword("false");
-  static const Keyword FINAL = const Keyword("final");
-  static const Keyword FINALLY = const Keyword("finally");
-  static const Keyword FOR = const Keyword("for");
-  static const Keyword IF = const Keyword("if");
-  static const Keyword IN = const Keyword("in");
-  static const Keyword IS = const Keyword("is", info: IS_INFO);
-  static const Keyword NEW = const Keyword("new");
-  static const Keyword NULL = const Keyword("null");
-  static const Keyword RETURN = const Keyword("return");
-  static const Keyword SUPER = const Keyword("super");
-  static const Keyword SWITCH = const Keyword("switch");
-  static const Keyword THIS = const Keyword("this");
-  static const Keyword THROW = const Keyword("throw");
-  static const Keyword TRUE = const Keyword("true");
-  static const Keyword TRY = const Keyword("try");
-  static const Keyword VAR = const Keyword("var");
-  static const Keyword VOID = const Keyword("void");
-  static const Keyword WHILE = const Keyword("while");
+  static const List<Keyword> values = const <Keyword> [
+      const Keyword("break"),
+      const Keyword("case"),
+      const Keyword("catch"),
+      const Keyword("class"),
+      const Keyword("const"),
+      const Keyword("continue"),
+      const Keyword("default"),
+      const Keyword("do"),
+      const Keyword("else"),
+      const Keyword("extends"),
+      const Keyword("false"),
+      const Keyword("final"),
+      const Keyword("finally"),
+      const Keyword("for"),
+      const Keyword("if"),
+      const Keyword("in"),
+      const Keyword("is", info: IS_INFO),
+      const Keyword("new"),
+      const Keyword("null"),
+      const Keyword("return"),
+      const Keyword("super"),
+      const Keyword("switch"),
+      const Keyword("this"),
+      const Keyword("throw"),
+      const Keyword("true"),
+      const Keyword("try"),
+      const Keyword("var"),
+      const Keyword("void"),
+      const Keyword("while"),
 
-  // Pseudo keywords:
-  static const Keyword ABSTRACT = const Keyword("abstract", isPseudo: true);
-  static const Keyword AS = const Keyword("as", info: AS_INFO, isPseudo: true);
-  static const Keyword ASSERT = const Keyword("assert", isPseudo: true);
-  static const Keyword EXTERNAL = const Keyword("external", isPseudo: true);
-  static const Keyword FACTORY = const Keyword("factory", isPseudo: true);
-  static const Keyword GET = const Keyword("get", isPseudo: true);
-  static const Keyword IMPLEMENTS = const Keyword("implements", isPseudo: true);
-  static const Keyword IMPORT = const Keyword("import", isPseudo: true);
-  static const Keyword INTERFACE = const Keyword("interface", isPseudo: true);
-  static const Keyword LIBRARY = const Keyword("library", isPseudo: true);
-  static const Keyword NATIVE = const Keyword("native", isPseudo: true);
-  static const Keyword OPERATOR = const Keyword("operator", isPseudo: true);
-  static const Keyword ON = const Keyword("on", isPseudo: true);
-  static const Keyword SET = const Keyword("set", isPseudo: true);
-  static const Keyword SOURCE = const Keyword("source", isPseudo: true);
-  static const Keyword STATIC = const Keyword("static", isPseudo: true);
-  static const Keyword TYPEDEF = const Keyword("typedef", isPseudo: true);
+      const Keyword("abstract", isBuiltIn: true),
+      const Keyword("as", info: AS_INFO, isBuiltIn: true),
+      const Keyword("assert", isBuiltIn: true),
+      const Keyword("external", isBuiltIn: true),
+      const Keyword("factory", isBuiltIn: true),
+      const Keyword("get", isBuiltIn: true),
+      const Keyword("implements", isBuiltIn: true),
+      const Keyword("interface", isBuiltIn: true),
+      const Keyword("operator", isBuiltIn: true),
+      const Keyword("set", isBuiltIn: true),
+      const Keyword("static", isBuiltIn: true),
+      const Keyword("typedef", isBuiltIn: true),
 
-  static const List<Keyword> values = const <Keyword> [
-      AS,
-      BREAK,
-      CASE,
-      CATCH,
-      CONST,
-      CONTINUE,
-      DEFAULT,
-      DO,
-      ELSE,
-      FALSE,
-      FINAL,
-      FINALLY,
-      FOR,
-      IF,
-      IN,
-      IS,
-      NEW,
-      NULL,
-      RETURN,
-      SUPER,
-      SWITCH,
-      THIS,
-      THROW,
-      TRUE,
-      TRY,
-      VAR,
-      VOID,
-      WHILE,
-      ABSTRACT,
-      ASSERT,
-      CLASS,
-      EXTENDS,
-      EXTERNAL,
-      FACTORY,
-      GET,
-      IMPLEMENTS,
-      IMPORT,
-      INTERFACE,
-      LIBRARY,
-      NATIVE,
-      OPERATOR,
-      ON,
-      SET,
-      SOURCE,
-      STATIC,
-      TYPEDEF ];
+      const Keyword("hide", isPseudo: true),
+      const Keyword("import", isPseudo: true),
+      const Keyword("library", isPseudo: true),
+      const Keyword("native", isPseudo: true),
+      const Keyword("on", isPseudo: true),
+      const Keyword("part", isPseudo: true),
+      const Keyword("show", isPseudo: true),
+      const Keyword("source", isPseudo: true) ];
+
+  static const DYNAMIC = const Keyword("Dynamic", isBuiltIn: true);
 
   final String syntax;
   final bool isPseudo;
+  final bool isBuiltIn;
   final PrecedenceInfo info;
 
   static Map<String, Keyword> _keywords;
   static Map<String, Keyword> get keywords {
     if (_keywords === null) {
       _keywords = computeKeywordMap();
     }
     return _keywords;
   }
 
   const Keyword(String this.syntax,
                 [bool this.isPseudo = false,
+                 bool this.isBuiltIn = false,
                  PrecedenceInfo this.info = KEYWORD_INFO]);
 
   static Map<String, Keyword> computeKeywordMap() {
     Map<String, Keyword> result = new LinkedHashMap<String, Keyword>();
     for (Keyword keyword in values) {
       result[keyword.syntax] = keyword;
     }
     return result;
   }
 
@@ skipping 125 matching lines @@
   final Keyword keyword;
 
   LeafKeywordState(String syntax) : keyword = Keyword.keywords[syntax];
 
   bool isLeaf() => true;
 
   KeywordState next(int c) => null;
 
   String toString() => keyword.syntax;
 }