Re-introduce string concatenation

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 418 matching lines @@
   static bool IsIncrementOperator(Token::Kind token);
 
   static SequenceNode* NodeAsSequenceNode(intptr_t sequence_pos,
                                           AstNode* node,
                                           LocalScope* scope);
 
   SequenceNode* MakeImplicitConstructor(const Function& func);
   AstNode* MakeStaticCall(const char* class_name,
                           const char* function_name,
                           ArgumentListNode* arguments);
+  String& Interpolate(ArrayNode* values);
   AstNode* MakeAssertCall(intptr_t begin, intptr_t end);
   AstNode* ThrowTypeError(intptr_t type_pos, const AbstractType& type);
 
   void CheckFunctionIsCallable(intptr_t token_index, const Function& function);
   void CheckOperatorArity(const MemberDesc& member, Token::Kind operator_token);
 
 
   const Script& script_;
   const TokenStream& tokens_;
   intptr_t token_index_;
@@ skipping 26 matching lines @@
   // code at all points in the try block where an exit from the block is
   // done using 'return', 'break' or 'continue' statements.
   TryBlocks* try_blocks_list_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_