Implement part header

runtime/vm/parser.h

 // 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.
 
 #ifndef VM_PARSER_H_
 #define VM_PARSER_H_
 
 #include "include/dart_api.h"
 
 #include "vm/ast.h"
@@ skipping 167 matching lines @@
   // The class or interface being parsed.
   const Class& current_class() const;
   void set_current_class(const Class& value);
 
   // Parsing a library or a regular source script.
   bool is_library_source() const {
     return (script_.kind() == RawScript::kScriptTag) ||
         (script_.kind() == RawScript::kLibraryTag);
   }
 
+  bool is_part_source() const {
+    return script_.kind() == RawScript::kSourceTag;
+  }
+
   // Parsing library patch script.
   bool is_patch_source() const {
     return script_.kind() == RawScript::kPatchTag;
   }
 
   intptr_t TokenPos() const { return tokens_iterator_.CurrentPosition(); }
   inline Token::Kind CurrentToken();
   Token::Kind LookaheadToken(int num_tokens);
   String* CurrentLiteral() const;
   RawDouble* CurrentDoubleLiteral() const;
@@ skipping 91 matching lines @@
 
   // Support for parsing libraries.
   Dart_Handle CallLibraryTagHandler(Dart_LibraryTag tag,
                                     intptr_t token_pos,
                                     const String& url);
   void ParseIdentList(GrowableObjectArray* names);
   void ParseLibraryDefinition();
   void ParseLibraryName();
   void ParseLibraryImportExport();
   void ParseLibraryPart();
+  void ParsePartHeader();
   void ParseLibraryNameObsoleteSyntax();
   void ParseLibraryImportObsoleteSyntax();
   void ParseLibraryIncludeObsoleteSyntax();
 
   void ResolveTypeFromClass(const Class& cls,
                             ClassFinalizer::FinalizationKind finalization,
                             AbstractType* type);
   RawAbstractType* ParseType(ClassFinalizer::FinalizationKind finalization);
   void ParseTypeParameters(const Class& cls);
   RawAbstractTypeArguments* ParseTypeArguments(
@@ skipping 298 matching lines @@
 
   // Allocate temporary only once per function.
   LocalVariable* expression_temp_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_