D-Programming-Language/phobos — pull request #462 by blackwhale (2012-02-26 20:36:17+00:00)
Title: fix Issue 7300 - std.regex.ShiftOr!dchar.search is broken

Aside from fixing this particular bug in one codepath of ShiftOr this includes
- A start on cleaning up old CTFE and compiler workarounds.
- Caching regexes was part of original std.regex though it had single recently used slot.