Re: [Boost-users] Metaprogamming question

Subject: Re: [Boost-users] Metaprogamming question
From: joaquin_at_[hidden]
Date: 2011-07-08 06:30:23

El 08/07/2011 12:17, John M. Dlugosz escribió:
> I roughed out a function that will be a template that dispatches to one of several
> different forms based on the nature of one of the arguments.  It's fairly simple, each
> helper call asking one question to further divide it up.
>
> But, I want to write a dozen functions that all have similar (if not identical) issues.
> So I want to abstract out the mixmaster and code that once.  I'm thinking that I map the
> argument to a "tag" that has many possible values, and have one set of overloaded
> functions.  It is easy to write the back end, as each function's tag is clear what that
> case is for.  Furthermore, I can make the tags empty structs that use an inheritance
> pattern, so any forms I don't supply for some function will simply pick the more general one.
>
> So, how do I write the metafunction that maps the type to the tag?

Using a boost::mpl::map?

http://www.boost.org/libs/mpl/doc/refmanual/map.html

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

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