| // Copyright 2014 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. | |
| // This file contains macros and macro-like constructs (e.g., templates) that | |
| // are commonly used throughout Chromium source. (It may also contain things | |
| // that are closely related to things that are commonly used that belong in this | |
| // file.) | |
| #ifndef BASE_MACROS_H_ | |
| #define BASE_MACROS_H_ | |
| // The COMPILE_ASSERT macro can be used to verify that a compile time | |
| // expression is true. For example, you could use it to verify the | |
| // size of a static array: | |
| // | |
| // COMPILE_ASSERT(ARRAYSIZE_UNSAFE(content_type_names) == CONTENT_NUM_TYPES, | |
| // content_type_names_incorrect_size); | |
| // | |
| // or to make sure a struct is smaller than a certain size: | |
| // | |
| // COMPILE_ASSERT(sizeof(foo) < 128, foo_too_large); | |
| // | |
| // The second argument to the macro is the name of the variable. If | |
| // the expression is false, most compilers will issue a warning/error | |
| // containing the name of the variable. | |
| #undef COMPILE_ASSERT | |
| #define COMPILE_ASSERT(expr, msg) static_assert(expr, #msg) | |
| #endif // BASE_MACROS_H_ |