On Wed, Apr 13, 2011 at 10:17 AM, Thorsten Ottosen < thorsten.ottosen@dezide.com> wrote:
Den 13-04-2011 10:14, Daniel Frey skrev:
On 11.04.2011, at 20:15, Matt Calabrese wrote:
That's really nice, but I think the syntax might be improved. How
about adding a ::value to enable_if (and the other templates) to allow your example to look like this:
template< class... T, bool = boost::enable_if_c< sizeof...( T ) == 10>::value> test( T&&... );
template< class T, bool = boost::enable_if< boost::is_arithmetic< T> >::value> operator T() const;
etc.? Get rid of typename, *&, boost::enabler and if you like, you can write 'bool Enabled = ...' instead of 'bool = ...' to be more verbose in your code.
Hm. Why not
template< class T, BOOST_ENABLE_WHEN( boost::is_xxx<T> ) >
?
That would likely have issues with commas in the conditional, which I don't think "double parens" could fix. That is, it's a problem unless all C++0x compilers which support this use of SFINAE also support variadic templates... - Jeff