David Abrahams <dave <at> boost-consulting.com> writes:
"Alexander Nasonov" <alnsn-boost <at> yandex.ru> writes:
Class template integral_promotion<T> returns promoted type for all types listed in [conv.prom] except bit-fields. For other types it's noop. If you're interested I can try to boostify it.
I'm interested. I don't have an immediate need but I think it's important anyway.
I've uploaded promote.tar.gz to http://boost-sandbox.sourceforge.net/vault/ In principle, tests compile on VC free version, various versions of gcc (>=3.2. 2), borland (without enums) and SunPro 5.3. I'm still not sure about an interface. Metafunction is called promote_integral. It recogizes cv qualifiers but discards them. References are not promoted. That is, short cv -> int short cv& -> short cv& std::string cv -> std::string std::string cv& -> std::string cv& Rationale for this is to be close to rvalues but the result isn't satisfactory. I'll rework it as soon as I find better solution. -- Alexander Nasonov