pfultz2/Tick — pull request #1 by rnburn (2014-10-15 02:22:02+00:00)
Title: adding value versions for is_true/is_false

Hi, would you consider adding value versions of the is_true/is_false functions so you can write code like

template
auto requires_(T) -> tick::valid<
is_true_c
>;

(using the "_c" naming convention from boosts mpl library http://www.boost.org/doc/libs/1_56_0/libs/mpl/)