Allow string literal concatenation in import clauses

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 538 matching lines @@
   static const bool kConsumeCascades = true;
   static const bool kNoCascades = false;
   AstNode* ParseExpr(bool require_compiletime_const, bool consume_cascades);
   AstNode* ParseExprList();
   AstNode* ParseConditionalExpr();
   AstNode* ParseUnaryExpr();
   AstNode* ParsePostfixExpr();
   AstNode* ParseSelectors(AstNode* primary, bool is_cascade);
   AstNode* ParseCascades(AstNode* expr);
   AstNode* ParsePrimary();
-  AstNode* ParseStringLiteral();
+  AstNode* ParseStringLiteral(bool allow_interpolation);
   String* ParseImportStringLiteral();
   AstNode* ParseCompoundLiteral();
   AstNode* ParseSymbolLiteral();
   AstNode* ParseListLiteral(intptr_t type_pos,
                             bool is_const,
                             const AbstractTypeArguments& type_arguments);
   AstNode* ParseMapLiteral(intptr_t type_pos,
                            bool is_const,
                            const AbstractTypeArguments& type_arguments);
   AstNode* ParseNewOperator(Token::Kind op_kind);
@@ skipping 148 matching lines @@
   intptr_t last_used_try_index_;
 
   bool unregister_pending_function_;
 
   DISALLOW_COPY_AND_ASSIGN(Parser);
 };
 
 }  // namespace dart
 
 #endif  // VM_PARSER_H_