[boost] [Filesystem] Exact type of name checking function?

From: Beman Dawes (bdawes_at_[hidden])
Date: 2003-08-18 08:44:22

In discussions about being able to specify a function to check the validity 
of path element names, a simple function pointer has been used:

   typedef bool (*name_check)( const std::string & name );

Alternately, boost::function could be used. The boost::function docs 
mention several advantages over function pointers; the advantage that might 
particularly apply is that:

"Boost.Function allows arbitrary compatible function objects to be targets 
(instead of requiring an exact function signature)."

That can be a really powerful advantage in some applications, but usage of 
name checking in boost::filesystem seems likely to be limited to very 
simple cases where plain function pointers will do just fine. I'd also like 
to avoid the dependency on an additional library, since Boost regression 
test reporting breaks if boost::filesystem::path breaks.

So unless someone comes forward with a killer argument, a simple function 
pointer will be used.

Comments?

--Beman