Re: [boost] auto_set / state_saver

From: Rob Stewart (stewart_at_[hidden])
Date: 2005-03-16 17:21:37

From: Jason Hise <chaos_at_[hidden]>
> 
> I use the following as an implementation detail, and it was mentioned by 
> Pavel that a similar facility called state_saver is used in the 
> implementation of the serialization library.  Does it make sense for 
> this to be refactored into boost/detail?
> 
> template < typename T >
> struct auto_set
> {
>     T & var; T val;
>     auto_set ( T & var, T val ) :
>     var ( var ), val ( val ) {  }
>     ~ auto_set (  ) { var = val; }
> };

I could see calling that auto_reset, but not auto_set.

You do realize that this would have to be documented as requiring
that T's copy assignment operator be nonthrowing, right?

-- 
Rob Stewart                           stewart_at_[hidden]
Software Engineer                     http://www.sig.com
Susquehanna International Group, LLP  using std::disclaimer;