Re: [boost] Proposal for #pragma once support

Subject: Re: [boost] Proposal for #pragma once support
From: Vladimir Prus (vladimir_at_[hidden])
Date: 2009-06-09 14:57:35

Stewart, Robert wrote:

> Zachary Turner wrote
> On Tuesday, June 09, 2009 2:30 PM
>>
>> And perhaps the best approach is what I mentioned in a previous
>> post, to force the programmer to explicitly define
>> BOOST_USE_PRAGMA_ONCE before including a boost header file.
>> This would solve the problem of having to modify every header
>> when new compilers were released.
> 
> I agree that a single manifest constant to control using #pragma once is the right thing to do. 
> However, the scheme you describe here puts too much onus on the Boost user.  Why not define that
> manifest constant on the compiler command line using Boost.Build?  You can define that for each
> compiler, unless I'm much mistaken.

That will not help somebody who includes boost headers in his project, I think.

- Volodya