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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 //
5 // This file defines preprocessor macros for stringizing preprocessor
6 // symbols (or their output) and manipulating preprocessor symbols
7 // that define strings.
8 
9 #ifndef BASE_STRINGS_STRINGIZE_MACROS_H_
10 #define BASE_STRINGS_STRINGIZE_MACROS_H_
11 
12 #include "build/build_config.h"
13 
14 // This is not very useful as it does not expand defined symbols if
15 // called directly. Use its counterpart without the _NO_EXPANSION
16 // suffix, below.
17 #define STRINGIZE_NO_EXPANSION(x) #x
18 
19 // Use this to quote the provided parameter, first expanding it if it
20 // is a preprocessor symbol.
21 //
22 // For example, if:
23 //   #define A FOO
24 //   #define B(x) myobj->FunctionCall(x)
25 //
26 // Then:
27 //   STRINGIZE(A) produces "FOO"
28 //   STRINGIZE(B(y)) produces "myobj->FunctionCall(y)"
29 #define STRINGIZE(x) STRINGIZE_NO_EXPANSION(x)
30 
31 #endif  // BASE_STRINGS_STRINGIZE_MACROS_H_
32