Re: [Boost-users] Boost.Function and Boost.Bind

Subject: Re: [Boost-users] Boost.Function and Boost.Bind
From: Yang Zhang (yanghatespam_at_[hidden])
Date: 2008-11-20 11:17:25

Steven Watanabe wrote:
> AMDG
> 
> Yang Zhang wrote:
>>   // ...but this does not compile.
>>   // bind(twice, bind(show, 0))();
> 
> #include <boost/bind/protect.hpp>
> 
> ...
> 
> bind(twice, protect(bind(show, 0)))

Thanks, this works.  Would anybody be able to explain what just 
happened?  According to:

http://www.boost.org/doc/libs/1_37_0/libs/bind/bind.html#nested_binds

this is supposed to prevent something from being evaluated, but I can't 
tell what precisely was going on.  I believe my question of 
understanding also ties into why their `apply` example was necessary.

> 
> In Christ,
> Steven Watanabe
> 
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-- 
Yang Zhang
http://www.mit.edu/~y_z/