1 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 //    http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14 
15 #ifndef COMPILER_PREPROCESSOR_EXPRESSION_PARSER_H_
16 #define COMPILER_PREPROCESSOR_EXPRESSION_PARSER_H_
17 
18 #include "DiagnosticsBase.h"
19 
20 namespace pp
21 {
22 
23 class Lexer;
24 struct Token;
25 
26 class ExpressionParser
27 {
28 public:
29 	struct ErrorSettings
30 	{
31 		Diagnostics::ID unexpectedIdentifier;
32 		bool integerLiteralsMustFit32BitSignedRange;
33 	};
34 
35 	ExpressionParser(Lexer *lexer, Diagnostics *diagnostics);
36 
37 	bool parse(Token *token,
38 	           int *result,
39 	           bool parsePresetToken,
40 	           const ErrorSettings &errorSettings,
41 	           bool *valid);
42 
43 private:
44 	Lexer *mLexer;
45 	Diagnostics *mDiagnostics;
46 };
47 
48 }  // namespace pp
49 #endif  // COMPILER_PREPROCESSOR_EXPRESSION_PARSER_H_
50