Terje Sletteb� <[EMAIL PROTECTED]> 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
[EMAIL PROTECTED] * http://www.boost-consulting.com
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