Re: [boost] BOOST_NOEXCEPT macro?

Subject: Re: [boost] BOOST_NOEXCEPT macro?
From: Dave Abrahams (dave_at_[hidden])
Date: 2011-02-17 15:51:55

On Thu, Feb 17, 2011 at 2:55 PM, Nevin Liber <nevin_at_[hidden]> wrote:
> On 17 February 2011 11:45, Dave Abrahams <dave_at_[hidden]> wrote:
>
>> On Thu, Feb 17, 2011 at 11:36 AM, Alexander Fokin <apfokin_at_[hidden]>
>> wrote:
>> > I believe it's not that simple.
>> >
>> > As I remember, throw() means the same thing as nothrow only in MSVC.
>> > For example, under GCC you'll have to use __attribute__((nothrow)).
>> >
>> > Correct me if I'm wrong.
>>
>> You're right.  In general, throw() has runtime semantics and can
>> produce runtime overhead in the form of increased executable size and
>> occasionally reduced speed.  noexcept has only compile-time semantics.
>>
>
> noexcept has runtime semantics as well, doesn't it?  If you are in a
> function declared noexcept(true) and an exception tries to escape,
> std::terminate is called.

Grrr!  Right, I forgot they added that behavior against my advice.

-- 
Dave Abrahams
BoostPro Computing
http://www.boostpro.com