| // 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_ |
