[Boost-users] Re: Bind question

From: Daniel James (daniel_at_[hidden])
Date: 2005-02-07 07:14:03

Surya Kiran Gullapalli wrote:
> The best way should be to use bind (or am i wrong here ?) from Boost 
> library.
> 
> But i'm not getting the syntax correctly here.
> 
> the crude way could be
> 
> *stable_sort (files.begin(), files.end(), (bind (&File::get_size, _1) > 
> bind (&File::get_size, _2))) ;*
> 
> that is call get_size() on first argument, and call get_size() on second 
> argument, and compare those values, and return a boolean value.
> 
> Can anybody please help me out with the syntax here. ??

Right syntax, wrong library. You can do this with Boost.Lamba.

http://www.boost.org/doc/html/lambda.html

You might also want to look at phoenix.

http://www.boost.org/libs/spirit/phoenix/index.html

By the way, the accessor functions in your File class need to be const 
for this to work.

Daniel