Re: [boost] Proposed new RAII Library

Subject: Re: [boost] Proposed new RAII Library
From: John Bytheway (jbytheway+boost_at_[hidden])
Date: 2012-09-14 21:27:43

On 14/09/12 19:33, Sergey Cheban wrote:
> 14.09.2012 22:48, Sohail Somani пишет:
> 
>> Or in C++11:
>>
>>     boost::scope_guard lolwhat( [&](){ CloseHandle(handle); } );
>>
>>     ...
>>     lolwhat.dismiss();
> What about
> boost::exception_guard somename( [&](){ CloseHandle(handle); } );
> that calls the function/lambda only if std::uncaught_exception() returns
> true?

std::uncaught_exception is very dangerous to use in this way.  See

http://www.gotw.ca/gotw/047.htm

In short: your function will misbehave if called from a destructor
during stack unwinding.

John Bytheway