c++ - 我怎样才能从构造函数中成员的默认初始化中捕获异常？

Question

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Answer 1

您可以使用函数 try block 。

tftp_server::tftp_server(unsigned short port_number)
try 
    : _socket(_io_service, udp::endpoint(udp::v4(), port_number))
{    
    //...
}
catch(...)
{

}

但是，引用 The Herb Sutter ( GotW 66 ) 的话:

if the catch block does not throw (either rethrow the original exception, or throw something new), and control reaches the end of the catch block of a constructor or destructor, then the original exception is automatically rethrown.

换句话说(也是萨特)

the only (repeat only) possible use for a constructor function-try-block is to translate an exception thrown from a base or member subobject

总而言之:您可以这样做，但通常没有意义。