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std::generic_category

科技促进发展：通用[医]范畴

Defined in header ​​
const std::error_category& generic_category(​(since C++11)

获取对泛型错误的静态错误类别对象的引用。对象需要重写虚拟函数。error_category::name()返回指向字符串的指针"generic"它用于识别与POSIX相对应的错误条件。errno密码。

参数

%280%29

返回值

派生为未指定运行时类型的静态对象的引用。std::error_category...

例外

noexcept规格：

noexcept

例

二次

#include <iostream>
#include <system_error>
#include <cerrno>
#include <string>
int main()
{
    std::error_condition econd = std::generic_category().default_error_condition(EDOM
    std::cout << "Category: " << econd.category().name() << '\n'
              << "Value: " << econd.value() << '\n'
              << "Message: " << econd.message() << '\n';
}

二次

产出：

二次

Category: generic
Value: 33
Message: Numerical argument out of domain

二次

另见

system_category (C++11)identifies the operating system error category (function)
errc (C++11)the std::error_condition enumeration listing all standard <cerrno> macro constants (class)

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