# static_assert

< c‎ | error

定义于头文件 `<assert.h>` |  |
#define static_assert _Static_assert |  |

此便利宏展开成关键词 _Static_assert 。

### 示例

    #include <assert.h>
    int main(void)
    {
        static_assert(2 + 2 == 4, "2+2 isn't 4");      // 良式
        static_assert(sizeof(int) < sizeof(char),
                     "this program requires that int is less than char"); // 编译时错误
    }

### 引用

- C11 标准（ISO/IEC 9899:2011）：

  - 7.2/3 Diagnostics <assert.h> (p: 186)

### 参阅