Subject: Re: [boost] Interesting variadic template trick
From: Gavin Lambert (gavinl_at_[hidden])
Date: 2013-11-19 16:38:25
On 20/11/2013 03:13, Quoth Mathias Gaunard:
>> template <typename ...T>
>> struct or_ {
>> static constexpr bool value = !noexcept(
>> allow_expansion((T::value ? throw : 0)...)
>> );
>> };
>
> An obvious problem with this is that it doesn't compile if exceptions
> are disabled.
> And I think being able to use meta-programming without exceptions is an
> important property to have.
If you look at the followup, it doesn't use noexcept any more.