Implement ParameterMirror.metadata.

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 "lib/invocation_mirror.h"
@@ skipping 126 matching lines @@
   // Parse top level of a class and register all functions/fields.
   static void ParseClass(const Class& cls);
 
   static void ParseFunction(ParsedFunction* parsed_function);
 
   // Parse and evaluate the metadata expressions at token_pos in the
   // class namespace of class cls (which can be the implicit toplevel
   // class if the metadata is at the top-level).
   static RawObject* ParseMetadata(const Class& cls, intptr_t token_pos);
 
-  // Parse a function func and retrieve parameter information that can not be
-  // found in its function object. Returns either an error if the parser fails
-  // (which could be the case for local functions), or a flat array of the size
-  // (2*number_of_parameters). For each parameter i in this array, (2*i)
-  // contains a bool indicating whether the parameter has been final, and
-  // (2*i+1) contains an array of its default values (or null if it has no
-  // default values).
+  // Parse a function to retrieve parameter information that is not retained in
+  // the dart::Function object. Returns either an error if the parse fails
+  // (which could be the case for local functions), or a flat array of entries
+  // for each parameter. Each parameter entry contains:
+  // * a Dart bool indicating whether the parameter was declared final
+  // * its default value (or null if none was declared)
+  // * an array of metadata (or null if no metadata was declared).
+  enum {
+    kParameterIsFinalOffset,
+    kParameterDefaultValueOffset,
+    kParameterMetadataOffset,
+    kParameterEntrySize,
+  };
   static RawObject* ParseFunctionParameters(const Function& func);
 
   // Format and print a message with source location.
   // A null script means no source and a negative token_pos means no position.
   static void PrintMessage(const Script& script,
                            intptr_t token_pos,
                            const char* message_header,
                            const char* format, ...) PRINTF_ATTRIBUTE(4, 5);
 
   // Build an error object containing a formatted error or warning message.
@@ skipping 211 matching lines @@
   RawAbstractType* ParseType(ClassFinalizer::FinalizationKind finalization);
   void ParseTypeParameters(const Class& cls);
   RawAbstractTypeArguments* ParseTypeArguments(
       ClassFinalizer::FinalizationKind finalization);
   void ParseQualIdent(QualIdent* qual_ident);
   void ParseMethodOrConstructor(ClassDesc* members, MemberDesc* method);
   void ParseFieldDefinition(ClassDesc* members, MemberDesc* field);
   void ParseClassMemberDefinition(ClassDesc* members,
                                   intptr_t metadata_pos);
   void ParseFormalParameter(bool allow_explicit_default_value,
+                            bool evaluate_metadata,
                             ParamList* params);
   void ParseFormalParameters(bool allow_explicit_default_values,
+                             bool evaluate_metadata,
                              ParamList* params);
   void ParseFormalParameterList(bool allow_explicit_default_values,
+                                bool evaluate_metadata,
                                 ParamList* params);
   void CheckConstFieldsInitialized(const Class& cls);
   void CheckConstructors(ClassDesc* members);
   AstNode* ParseExternalInitializedField(const Field& field);
   void ParseInitializedInstanceFields(
       const Class& cls,
       LocalVariable* receiver,
       GrowableArray<Field*>* initialized_fields);
   void CheckDuplicateFieldInit(intptr_t init_pos,
                                GrowableArray<Field*>* initialized_fields,
@@ skipping 310 matching lines @@
   intptr_t last_used_try_index_;
 
   bool unregister_pending_function_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_