add FB_SINGLE_ARG macro
authorPhilip Pronin <philipp@fb.com>
Sun, 12 Jan 2014 22:37:26 +0000 (14:37 -0800)
committerJordan DeLong <jdelong@fb.com>
Thu, 16 Jan 2014 19:21:12 +0000 (11:21 -0800)
commit6508587c025eb9cd133abe73759e12a2049bdfe1
tree3feb74bb2c135e3910309ce225f934f6b3bc367c
parent311c98eb62832be70d86cf949dc1e5127028b3ca
add FB_SINGLE_ARG macro

Test Plan: eyeballed it

@override-unit-failures

Reviewed By: soren@fb.com

FB internal diff: D1125180
folly/Preprocessor.h