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std::error_condition::operator bool

STD：错误[医]条件：操作人员bool

explicit operator bool() const;​(since C++11)

检查存储的错误代码是否为零。

参数

%280%29

返回值

true如果value != 0，，，false否则。

例外

noexcept规格：

noexcept

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