Re: [boost] [typeof] 2 questions

Subject: Re: [boost] [typeof] 2 questions
From: Eric Niebler (eric_at_[hidden])
Date: 2010-06-27 19:37:41

On 6/27/2010 2:16 PM, Peder Holt wrote:
> 2010/5/11 Eric Niebler <eric_at_[hidden]>
> 
>> 1) Some compilers don't support typeof in any form, even emulated. From
>> looking at typeof.hpp, it looks like just #include'ing typeof.hpp on
>> those compilers results in a hard error. I'd like a way to test whether
>> typeof is supported and use it if so, otherwise do something else. How
>> can I do that?
>>
>>
> Sorry for the long delay. I have checked in a fix for this. If you include
> the typeof header on a compiler not supporting typeof emulation (read:
> Borland compilers), BOOST_TYPEOF_EMULATION_UNSUPPORTED will be defined.
> BOOST_TYPEOF(Expr) will expand to
> boost::type_of::typeof_emulation_is_unsupported_on_this_compiler

Great! Thanks Peter.

-- 
Eric Niebler
BoostPro Computing
http://www.boostpro.com