Use BufferCoord sentinel type for regex matching on BufferIterators

BufferIterators are large-ish, and need to check the buffer pointer
on comparison. Checking against a coord is just a 64 bit comparison.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/meta.hh b/src/meta.hh
index 280f2b93..15429ca8 100644
--- a/src/meta.hh
+++ b/src/meta.hh
@@ -9,6 +9,8 @@ inline namespace Meta
 struct AnyType{};
 template<typename T> struct Type : AnyType {};
 
+template<typename T> using void_t = void;
+
 }
 }