D-Programming-Language/phobos — pull request #2521 by 9il (2014-09-16 14:41:43+00:00)
Title: fix Issue 12412

Issue:
https://issues.dlang.org/show_bug.cgi?id=12412

Make isNaN, isNormal, isSubnormal, isFinite, isInfinity CTFE-able.