Re: [Boost-users] [phoenix] adding const to member_variable bind

Subject: Re: [Boost-users] [phoenix] adding const to member_variable bind
From: Joel de Guzman (joel_at_[hidden])
Date: 2008-11-11 21:27:55

Steven Watanabe wrote:
> AMDG
> 
> Steven Watanabe wrote:
>> Joel de Guzman wrote:
>>> Thanks, Steven. Please feel free to apply the patch.
>>
>> I've started adding this to bind_member_variable_tests.cpp
>> and I'm running into more problems than I expected.  I'll get back to 
>> you.
> 
> I'm stuck here:
> 
> struct x {
>    int m;
> };
> 
> // instantiates member_variable::result<x>,
> // but calls member_variable::operator()(const x&).
> bind(&x::m, x())();
> 
> // instantiates member_variable::result<x> because
> // top level references are stripped.
> bind(&x::m, ref(x));
> 
> There is no way for result to distinguish between these cases,
> even though they are different.

Out of curiosity, how does Boost.Bind and Lambda.Bind behave in this
regard?

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net