std::bad_exception
Defined in header <exception> | | |
|---|---|---|
class bad_exception; | | |
std::bad_exception是C++运行时在以下情况下引发的异常的类型：
1%29std::exception_ptr存储捕获异常的副本，如果异常对象的副本构造函数被std::current_exception引发异常，则捕获的异常是std::bad_exception...
2) If a dynamic exception specification is violated and std::unexpected throws or rethrows an exception that still violates the exception specification, but the exception specification allows std::bad_exception, std::bad_exception is thrown. | (until C++17) |
|---|
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二次
继承图
成员函数
(constructor) | constructs the bad_exception object (public member function) |
|---|---|
operator= | copies the object (public member function) |
what virtual | returns the explanatory string (virtual public member function) |
继承自STD：例外
成员函数
(destructor) virtual | destructs the exception object (virtual public member function of std::exception) |
|---|---|
what virtual | returns an explanatory string (virtual public member function of std::exception) |
例
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#include <iostream>
#include <exception>
#include <stdexcept>
void my_unexp() { throw; }
void test() throw(std::bad_exception)
{
throw std::runtime_error("test");
}
int main()
{
std::set_unexpected(my_unexp);
try {
test();
} catch(const std::bad_exception& e)
{
std::cerr << "Caught " << e.what() << '\n';
}
}二次
产出：
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Caught std::bad_exception二次
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