Re: [boost] Re: Re: Proposal: cartesian_product algorithm and afinitestatemachinetemplate library

From: Mattias Flodin (flodin_at_[hidden])
Date: 2002-10-31 03:09:54

On Wed, Oct 30, 2002 at 03:45:05PM -0500, Marc Jacobs wrote:
> > Exception handling may be expensive. Perhaps it could be good to provide a
> > query, to determine if an operation may be performed.
> 
> Good suggestion. I will add it. Requires a little slight of hand given that
> the state objects have no intrinsic value, just type, but entirely doable.
> Usage would probably be something like:
> 
> if( context::equals( fsmtl::state< on >() ) ) {
>     // ...
> }

Why not also have:

if(context::raise( fsmtl::event< fsm::poweron >() )) {
      // ...
}

I suppose this would require configuration by policies, though.

-- 
Mattias Flodin <flodin_at_[hidden]>  -  http://www.cs.umu.se/~flodin/
Room NADV 102
Department of Computing Science
Umeå University
S-901 87 Umeå, Sweden
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