Pass type argument vector to generic functions (if --reify-generic-functions is

runtime/lib/invocation_mirror_patch.dart

 // 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.
 
 class _InvocationMirror implements Invocation {
   // Constants describing the invocation type.
   // _FIELD cannot be generated by regular invocation mirrors.
   static const int _METHOD = 0;
   static const int _GETTER = 1;
   static const int _SETTER = 2;
   static const int _FIELD = 3;
   static const int _LOCAL_VAR = 4;
   static const int _TYPE_SHIFT = 0;
   static const int _TYPE_BITS = 3;
   static const int _TYPE_MASK = (1 << _TYPE_BITS) - 1;
 
   // These values, except _DYNAMIC and _SUPER, are only used when throwing
   // NoSuchMethodError for compile-time resolution failures.
   static const int _DYNAMIC = 0;
   static const int _SUPER = 1;
   static const int _STATIC = 2;
   static const int _CONSTRUCTOR = 3;
   static const int _TOP_LEVEL = 4;
   static const int _CALL_SHIFT = _TYPE_BITS;
   static const int _CALL_BITS = 3;
   static const int _CALL_MASK = (1 << _CALL_BITS) - 1;
 
+  // ArgumentsDescriptor layout. Keep in sync with enum in dart_entry.h.
+  static const int _TYPE_ARGS_LEN = 0;
+  static const int _COUNT = 1;
+  static const int _POSITIONAL_COUNT = 2;
+  static const int _FIRST_NAMED_ENTRY = 3;
+
   // Internal representation of the invocation mirror.
   final String _functionName;
   final List _argumentsDescriptor;
   final List _arguments;
   final bool _isSuperInvocation;
 
   // External representation of the invocation mirror; populated on demand.
   Symbol _memberName;
   int _type;
   List _positionalArguments;
@@ skipping 15 matching lines @@
 
   Symbol get memberName {
     if (_memberName == null) {
       _setMemberNameAndType();
     }
     return _memberName;
   }
 
   List get positionalArguments {
     if (_positionalArguments == null) {
-      int numPositionalArguments = _argumentsDescriptor[1];
+      int numPositionalArguments = _argumentsDescriptor[_POSITIONAL_COUNT];
       // Don't count receiver.
       if (numPositionalArguments == 1) {
         return _positionalArguments = const [];
       }
       // Exclude receiver.
       _positionalArguments =
           new _ImmutableList._from(_arguments, 1, numPositionalArguments - 1);
     }
     return _positionalArguments;
   }
 
   Map<Symbol, dynamic> get namedArguments {
     if (_namedArguments == null) {
-      int numArguments = _argumentsDescriptor[0] - 1; // Exclude receiver.
-      int numPositionalArguments = _argumentsDescriptor[1] - 1;
+      int numArguments = _argumentsDescriptor[_COUNT] - 1; // Exclude receiver.
+      int numPositionalArguments = _argumentsDescriptor[_POSITIONAL_COUNT] - 1;
       int numNamedArguments = numArguments - numPositionalArguments;
       if (numNamedArguments == 0) {
         return _namedArguments = const {};
       }
       _namedArguments = new Map<Symbol, dynamic>();
       for (int i = 0; i < numNamedArguments; i++) {
-        String arg_name = _argumentsDescriptor[2 + 2 * i];
-        var arg_value = _arguments[_argumentsDescriptor[3 + 2 * i]];
+        int namedEntryIndex = _FIRST_NAMED_ENTRY + 2 * i;
+        String arg_name = _argumentsDescriptor[namedEntryIndex];
+        var arg_value = _arguments[_argumentsDescriptor[namedEntryIndex + 1]];
         _namedArguments[new internal.Symbol.unvalidated(arg_name)] = arg_value;
       }
       _namedArguments = new Map.unmodifiable(_namedArguments);
     }
     return _namedArguments;
   }
 
   bool get isMethod {
     if (_type == null) {
       _setMemberNameAndType();
@@ skipping 24 matching lines @@
 
   _InvocationMirror(this._functionName, this._argumentsDescriptor,
       this._arguments, this._isSuperInvocation);
 
   static _allocateInvocationMirror(String functionName,
       List argumentsDescriptor, List arguments, bool isSuperInvocation) {
     return new _InvocationMirror(
         functionName, argumentsDescriptor, arguments, isSuperInvocation);
   }
 }