Re: [Boost-users] [mpl] is_constructible_from

Subject: Re: [Boost-users] [mpl] is_constructible_from
From: Ovanes Markarian (om_boost_at_[hidden])
Date: 2009-03-17 12:15:53

Some time ago, I needed a trait is_copy_constructible, which is a special
case of is_constructible_from. I remeber to have some thought, that if C++
would support injected friends it might be possible to calculate. But that
was really tricky solution and I just posponed it until the compilers
support injected friends (due to the upcoming standard). At least MSVC 9
supports it now and I think we could try solving it, may be for the first
for copy constructible trait and later generalize it.

On Tue, Mar 17, 2009 at 4:50 PM, Steven Watanabe <watanabesj_at_[hidden]>wrote:

> AMDG
>
> How do you get an expression to have
> a different type depending on whether
> a given class has a particular constructor?
>
> In Christ,
> Steven Watanabe