Re: [boost] Re: Fun, only handled by vc6/7!

From: David Abrahams (dave_at_[hidden])
Date: 2003-01-13 07:39:12

Terje Slettebø <tslettebo_at_[hidden]> writes:

> Why would we want that? What is this useful for?

It would be useful for writing a templated implicit conversion
operator with restricted applicability via SFINAE.

SFINAE is a feature of the language which (coincidentally) allows a
technique for removing functions from the overload set based on some
compile-time computation.  This technique relies on having a return
type or parameter type to play with.  Unfortunately, implicit
conversion operators have neither.

Read all about SFINAE in Jossutis & Vandevoorde.

-- 
                       David Abrahams
   dave_at_[hidden] * http://www.boost-consulting.com
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