Subject: Re: [boost] [static_if] Is there interest in a `static if` emulation library?
From: lcaminiti (lorcaminiti_at_[hidden])
Date: 2014-09-01 21:24:19
> Another way accomplishing this is to pass in an identity function:
> Then you can call it like this:
> template< typename T >
> void assign ( T& x, T const& y )
> x = y;
> static_if<boost::has_equal_to<T>::value>((auto f)
> assert(f(x) == f(y));
> std::cout << "asserted for: " << typeid(T).name() <<
> .else_( (auto)
> std::cout << "cannot assert for: " << typeid(T).name() <<
> The identity function will make non-dependent types dependent, so this
Clever! However, IMO the `auto f` would look somewhat arbitrary to users
(I'd have to explain it "magically" comes from within the implementation so
you don't have to the bind...). So I'd probably stick with the bind because
even if more verbose it's workings are more obvious to the users. Thank you
for the suggestion.
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