[boost] Re: auto_set / state_saver

From: Edward Diener (eddielee_at_[hidden])
Date: 2005-03-13 20:22:56

Jason Hise wrote:
> 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 ) :

auto_set(T & var,T val = T()):

// allows one to just specify a variable to be auto-set back to its default
value also

>     var ( var ), val ( val ) {  }
>     ~ auto_set (  ) { var = val; }
> };