Re: [boost] [spirit] Causes a blizzard of warning from Boost.Formatunder MSVC?

From: Sebastian Redl (sebastian.redl_at_[hidden])
Date: 2007-12-15 07:52:17

John Maddock wrote:
> If you pass a pair of std::size_t's to std::min or std::max then:
>
> * You get no warning if the min/max<unsigned> templates haven't been 
> instantiated yet.
> * A warning if some other code has already instantiated 
> std::min/max<unsigned>.
>
> Truely weird and very annoying indeed !
>   
Apparently the template is instantiated per truly different type, but it
carries the __w64 annotation of the first such type it is instantiated
with. In other words, if the first instantiation is min<unsigned>,
passing the "unsigned __w64" size_t causes the warning.
Makes me wonder, if the first instantiation is min<unsigned __w64>, does
assigning the return value of min(unsigned, unsigned) to unsigned cause
the warning, too?

In any case, definitely an MS bug. A very tricky one.

Sebastian Redl