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std::overflow_error

性病：溢出[医]误差

Defined in header ​​
class overflow_error;​​

定义要作为异常抛出的对象类型。它可用于报告算术溢出错误%28，也就是说，对于目标类型%29，计算结果太大的情况。

引发此异常的唯一标准库组件是std::bitset::to_ulong和std::bitset::to_ullong...

标准库组件的数学函数不会抛出此异常%28数学函数报告溢出错误，如math_errhandling29%。然而，第三方库使用这个。例如，助教数学抛出std::overflow_error如果boost::math::policies::throw_on_error启用%28默认设置%29。

二次

二次

继承图

成员函数

(constructor)constructs the exception object (public member function)

性病：溢出[医]错误：：溢出[医]误差

explicit overflow_error( const std::string& what_arg (1)​
explicit overflow_error( const char* what_arg (2)(since C++11)

构造异常对象what_arg作为解释性字符串，可以通过what()...

因为复制std::exception不允许抛出异常，此消息通常作为单独分配的引用计数字符串存储在内部。这也是为什么没有构造函数std::string&&：：无论如何，它必须复制内容。

参数

what_arg-explanatory string

例外

可抛std::bad_alloc...

继承自STD：例外

成员函数

(destructor) virtualdestructs the exception object (virtual public member function of std::exception)
what virtualreturns an explanatory string (virtual public member function of std::exception)

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