license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame^] | 1 | // Copyright (c) 2006-2008 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. |
mmentovai@google.com | fa5f993 | 2008-08-22 07:26:06 +0900 | [diff] [blame] | 4 | |
| 5 | #ifndef BASE_COMPILER_SPECIFIC_H_ |
| 6 | #define BASE_COMPILER_SPECIFIC_H_ |
| 7 | |
| 8 | #include "build/build_config.h" |
| 9 | |
| 10 | #if defined(COMPILER_MSVC) |
| 11 | |
| 12 | // Macros for suppressing and disabling warnings on MSVC. |
| 13 | // |
| 14 | // Warning numbers are enumerated at: |
| 15 | // http://msdn.microsoft.com/en-us/library/8x5x43k7(VS.80).aspx |
| 16 | // |
| 17 | // The warning pragma: |
| 18 | // http://msdn.microsoft.com/en-us/library/2c8f766e(VS.80).aspx |
| 19 | // |
| 20 | // Using __pragma instead of #pragma inside macros: |
| 21 | // http://msdn.microsoft.com/en-us/library/d9x1s805.aspx |
| 22 | |
| 23 | // MSVC_SUPPRESS_WARNING disables warning |n| for the remainder of the line and |
| 24 | // for the next line of the source file. |
| 25 | #define MSVC_SUPPRESS_WARNING(n) __pragma(warning(suppress:n)) |
| 26 | |
| 27 | // MSVC_PUSH_DISABLE_WARNING pushes |n| onto a stack of warnings to be disabled. |
| 28 | // The warning remains disabled until popped by MSVC_POP_WARNING. |
| 29 | #define MSVC_PUSH_DISABLE_WARNING(n) __pragma(warning(push)) \ |
| 30 | __pragma(warning(disable:n)) |
| 31 | #define MSVC_POP_WARNING() __pragma(warning(pop)) |
| 32 | |
| 33 | // Allows |this| to be passed as an argument in constructor initializer lists. |
| 34 | // This uses push/pop instead of the seemingly simpler suppress feature to avoid |
| 35 | // having the warning be disabled for more than just |code|. |
| 36 | // |
| 37 | // Example usage: |
| 38 | // Foo::Foo() : x(NULL), ALLOW_THIS_IN_INITIALIZER_LIST(y(this)), z(3) {} |
| 39 | // |
| 40 | // Compiler warning C4355: 'this': used in base member initializer list: |
| 41 | // http://msdn.microsoft.com/en-us/library/3c594ae3(VS.80).aspx |
| 42 | #define ALLOW_THIS_IN_INITIALIZER_LIST(code) MSVC_PUSH_DISABLE_WARNING(4355) \ |
| 43 | code \ |
| 44 | MSVC_POP_WARNING() |
| 45 | |
| 46 | #else // COMPILER_MSVC |
| 47 | |
| 48 | #define MSVC_SUPPRESS_WARNING(n) |
| 49 | #define MSVC_PUSH_DISABLE_WARNING(n) |
| 50 | #define MSVC_POP_WARNING() |
| 51 | #define ALLOW_THIS_IN_INITIALIZER_LIST(code) code |
| 52 | |
| 53 | #endif // COMPILER_MSVC |
| 54 | |
| 55 | #endif // BASE_COMPILER_SPECIFIC_H_ |
license.bot | f003cfe | 2008-08-24 09:55:55 +0900 | [diff] [blame^] | 56 | |