|  | // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 
|  | // Use of this source code is governed by a BSD-style license that can be | 
|  | // found in the LICENSE file. | 
|  |  | 
|  | #ifndef TOOLS_GN_OPERATORS_H_ | 
|  | #define TOOLS_GN_OPERATORS_H_ | 
|  |  | 
|  | class BinaryOpNode; | 
|  | class Err; | 
|  | class ParseNode; | 
|  | class Scope; | 
|  | class UnaryOpNode; | 
|  | class Value; | 
|  |  | 
|  | Value ExecuteUnaryOperator(Scope* scope, | 
|  | const UnaryOpNode* op_node, | 
|  | const Value& value, | 
|  | Err* err); | 
|  | Value ExecuteBinaryOperator(Scope* scope, | 
|  | const BinaryOpNode* op_node, | 
|  | const ParseNode* left, | 
|  | const ParseNode* right, | 
|  | Err* err); | 
|  |  | 
|  | #endif  // TOOLS_GN_OPERATORS_H_ |