C++异常处理的一个通用的xcept头文件

最新推荐文章于 2023-03-30 18:25:06 发布

最新推荐文章于 2023-03-30 18:25:06 发布 · 543 阅读

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本文定义了几种C++异常类，包括因初始化错误、内存不足、越界操作及大小不匹配等情况引发的异常。通过重新定义new handler的方式，将内存不足时抛出的标准异常更改为自定义的NoMem异常。

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#ifndef Xcept_
#define Xcept_

#include <new.h>

// bad initializers
class BadInitializers {
    public:
       BadInitializers() {}
};

// insufficient memory
class NoMem {
    public:
       NoMem() {}
};

// change new to throw NoMem instead of standard behavior
// Visual C++ requires following form of my_new_handler
int my_new_handler(size_t x)
{
    throw NoMem();
    // even though the following statement is unreachable,
    // visual C++ will not compile successfully without it
    return 0;
};

_PNH Old_Handler_ = _set_new_handler(my_new_handler);

// improper array, find, insert, or delete index
// or deletion from empty structure
class OutOfBounds {
    public:
       OutOfBounds() {}
};

// use when operands should have matching size
class SizeMismatch {
    public:
       SizeMismatch() {}
};

// use when zero was expected
class MustBeZero {
    public:
       MustBeZero() {}
};

// use when zero was expected
class BadInput {
    public:
       BadInput() {}
};

#endif