[boost] Re: A better CopyPtr

From: Kevlin Henney (kevlin_at_[hidden])
Date: 2000-03-07 14:30:58

In message <Pine.LNX.4.10.10003070659430.1296-100000_at_kevins-linux>,
Kevin Atkinson <kevinatk_at_[hidden]> writes
>On Tue, 7 Mar 2000, Kevlin Henney wrote:
>> And here is one that is simpler, exception safe, but only as efficient
>> as the original version:
>> 
>>         template<typename T>
>>         CopyPtr<T> & CopyPtr<T>::operator=(const CopyPtr & other)
>>         {
>>                 T * old = ptr;
>>                 ptr = other.ptr ? new T(*other.ptr) : 0;
>>                 delete old;
>>                 return *this;
>>         }
>
>How is mine not exception safe?

Sorry, this reply was meant to be against the original version, which
was not exception safe -- a failed new or ctor would lead to a garbage
pointer.
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  Kevlin Henney                 Without art we are nothing
  kevlin_at_[hidden]                but monkeys with car keys
  kevlin_at_[hidden]
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