std::bad_alloc
Defined in header <new> | | |
|---|---|---|
class bad_alloc; | | |
std::bad_alloc作为异常抛出的对象的类型。分配函数若要报告分配存储空间失败，请执行以下操作。
二次
二次
继承图
成员函数
(constructor) | constructs the bad_alloc object (public member function) |
|---|---|
operator= | replaces a bad_alloc object (public member function) |
what | returns explanatory string (public member function) |
STD：不好[医]阿罗克：：坏[医]异种
bad_alloc(); | | |
|---|
构造新bad_alloc对象，该对象具有实现定义的以空结尾的字节字符串，该字符串可通过以下方式访问：what()...
参数
%280%29
例外
(none) | (until C++11) |
|---|---|
noexcept specification: noexcept | (since C++11) |
STD：不好[医]分配数：：操作员=
bad_alloc& operator=( const bad_alloc& other ); | | |
|---|
分配...的内容other...
参数
other | - | another exception object to assign |
|---|
返回值
*this...
例外
(none) | (until C++11) |
|---|---|
noexcept specification: noexcept | (since C++11) |
STD：不好[医]阿罗克：什么？
virtual const char* what() const; | | |
|---|
返回解释性字符串。
参数
%280%29
返回值
指向带解释性信息的以空结尾的字符串的指针。
例外
(none) | (until C++11) |
|---|---|
noexcept specification: noexcept | (since C++11) |
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
二次
#include <iostream>
#include <new>
int main()
{
try {
while (true) {
new int[100000000ul];
}
} catch (const std::bad_alloc& e) {
std::cout << "Allocation failed: " << e.what() << '\n';
}
}二次
可能的产出：
二次
Allocation failed: std::bad_alloc二次
另见
operator newoperator new[] | allocation functions (function) |
|---|
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