标准C ++库中有什么异常类

问题描述

标准C ++库中包含的异常类是什么，它们应该用于什么？我知道有一些新的C ++ 11例外，但我不知道他们是什么，或者他们在哪里。

解决方案

pre> std :: exception< exception>界面（如果你应该抓住这个话）有争议）
std :: bad_alloc< new>无法分配存储
std :: bad_array_new_length< new>无效的数组长度
std :: bad_cast< typeinfo>执行无效的动态转换
std :: bad_exception< exception>表示抛出一个不正确的异常
std :: bad_function_call< functional>抛出nullstd :: function
std :: bad_typeid< typeinfo>在空指针上使用typeinfo
std :: bad_weak_ptr< memory>从bad_ptr
std :: logic_error< stdexcept>构造一个shared_ptr程序执行前检测到的错误
std :: domain_error< stdexcept>参数超出有效范围
std :: future_error< future>违反了std :: promise / std :: future条件
std :: invalid_argument< stdexcept>无效参数
std :: length_error< stdexcept>长度超过其最大允许大小
std :: out_of_range< stdexcept>参数值不在其预期范围内
std :: runtime_error< stdexcept>程序执行时可检测到的错误
std :: overflow_error< stdexcept>算术溢出错误。
std :: underflow_error< stdexcept>算术下溢误差。
std :: range_error< stdexcept>内部计算中的范围错误
std :: regex_error< regex>来自正则表达式库的错误。
std :: system_error< system_error>来自操作系统或其他C API
std :: ios_base :: failure< ios>输入或输出错误


资料来源：

实际上，大多数异常都是自定义异常派生自 logic_error 和 runtime_error 。不是这些被忽略，但是许多例外是域特定的。

请记住，异常应该反映出什么问题，而不是谁扔了（否MyProgramException）

What are the exception classes that are included in the standard C++ library, and what should they be used for? I know there are a few new C++11 exceptions, but I'm not sure what they are or where they are.

解决方案

std::exception <exception> interface (debatable if you should catch this)
    std::bad_alloc <new> failure to allocate storage
        std::bad_array_new_length <new> invalid array length
    std::bad_cast <typeinfo> execution of an invalid dynamic-cast
    std::bad_exception <exception> signifies an incorrect exception was thrown
    std::bad_function_call <functional> thrown by "null" std::function
    std::bad_typeid <typeinfo> using typeinfo on a null pointer
    std::bad_weak_ptr <memory> constructing a shared_ptr from a bad weak_ptr
    std::logic_error <stdexcept> errors detectable before the program executes
        std::domain_error <stdexcept> parameter outside the valid range
        std::future_error <future> violated a std::promise/std::future condition
        std::invalid_argument <stdexcept> invalid argument
        std::length_error <stdexcept> length exceeds its maximum allowable size
        std::out_of_range <stdexcept> argument value not in its expected range
    std::runtime_error <stdexcept> errors detectable when the program executes
        std::overflow_error <stdexcept> arithmetic overflow error.
        std::underflow_error <stdexcept> arithmetic underflow error.
        std::range_error <stdexcept> range errors in internal computations
        std::regex_error <regex> errors from the regular expression library.
        std::system_error <system_error> from operating system or other C API
            std::ios_base::failure <ios> Input or output error

Source: http://en.cppreference.com/w/cpp/error/exception
In practice, most exceptions are custom exceptions derived from logic_error and runtime_error. Not that these are neglected, but that many exceptions are domain specific.

Keep in mind that an exception should reflect what went wrong and not who threw it. (No "MyProgramException"s)

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