Implement ParameterMirror.metadata.

runtime/vm/parser.h

Index: runtime/vm/parser.h
diff --git a/runtime/vm/parser.h b/runtime/vm/parser.h
index e5e53ec0b0944230e058fb01084a407432841978..5101cfbc52abe84510117f8a708e5b90dcc04f9a 100644
--- a/runtime/vm/parser.h
+++ b/runtime/vm/parser.h
@@ -144,13 +144,14 @@ class Parser : public ValueObject {
   // 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
+  // Parse a function func and retrieve parameter information that cannot 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).
+  // (3*number_of_parameters). For each parameter i in this array, (3*i)
+  // contains a bool indicating whether the parameter has been final, (3*i+1)

[siva, 2013/08/28 23:26:48]

Ditto comment about '3' here.

+  // contains an array of its default values (or null if it has no default
+  // values), and (3*i+2) contains an array of metadata (or null if no metadata
+  // was declared).
   static RawObject* ParseFunctionParameters(const Function& func);
 
   // Format and print a message with source location.
@@ -382,10 +383,13 @@ class Parser : public ValueObject {
   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);