WebFeb 13, 2024 · A static_assert declaration may appear at namespace and block scope (as a block declaration) and inside a class body (as a member declaration ). If bool-constexpr is well-formed and evaluates to true, or is evaluated in the context of a template definition and the template is uninstantiated, this declaration has no effect. WebMar 22, 2024 · static_assert静态断言,是C++关键字,作用是让编译器在编译期对常量表达时进行断言。. 如果通过,就不报错;如果不通过,就报错。. 用法:. static_assert(常量表达式, 错误提示信息); 1. 常量表达式的值为true或者false,或者可以转化为true/false。. 如果 …
static_assert declaration (since C++11) - cppreference.com
Web解释. static_assert 声明可以出现在命名空间和块作用域中(作为 块声明 ),也可以在类体中(作为 成员声明 )。. 若 布尔常量表达式 返回 true ,则此声明无效果。. 否则发布编译时错误,而若存在 消息 ,则诊断消息中包含其文本。. 消息 可省略。. WebApr 10, 2024 · @PaulSanders as a "case" value in a switch must be a compile time constant, if it compiles, the hashes for them, will be done at compile time. The myHash call in the switch on the argument stringType may or may not be a compile time constant, depending on the context the function is called (in a constant expression or not.) … dutch sheets take 15 for november 28 2020
C语言宏定义-静态断言宏static_assert - CSDN博客
WebMar 10, 2024 · 在C语言中,static关键字可以用来定义具有静态存储持续时间的变量或函数。 当在函数内部声明一个静态变量时,该变量将在函数调用结束后仍然存在,并保持其值不变。 ... 允许使用 _Static_assert 关键字来声明编译时常量表达式的值。 7. 允许在函数参数 … WebAug 2, 2010 · For example, GCC versions before 4.6 do not support _Static_assert, and G++ versions before 4.3 do not support static_assert, which was standardized by C11 and C++11. C _Static_assert and C++ static_assert are keywords that can be used without including . The Gnulib substitutes are macros that require including . WebBoost Static Assertion Libraryが開発されたときに、コンパイル時アサートの設計要件が認識された:. アサーションに関する全ての処理は、コンパイル時に実行する必要がある。. 実行時に空間的、時間的なコストをかけることは許可しない. 初心者に教えることが ... dutch sheets wikipedia