From: Peter Griess <pgriess@fb.com>
Date: Thu, 26 Sep 2013 15:05:57 +0000 (-0500)
Subject: Cast lambda to function pointer for boost::split().
X-Git-Tag: v0.22.0~830
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=443652777459d54c8cb5eac1c49d19b7a2218e6a;p=folly.git

Cast lambda to function pointer for boost::split().

Summary:
- For some reason, Boost's internals aren't considering this lambda a
type that's castable. Cast it to a function pointer before using it.

Test Plan:
- fbconfig -r folly && fbmake runtests
- ./configure && make check on Ubuntu/FC/Mac
- _bin/folly/test/string_test --benchmark

Reviewed By: alandau@fb.com

FB internal diff: D998594
---

diff --git a/folly/test/StringTest.cpp b/folly/test/StringTest.cpp
index aac79a8a..c48c4059 100644
--- a/folly/test/StringTest.cpp
+++ b/folly/test/StringTest.cpp
@@ -965,9 +965,10 @@ BENCHMARK(splitStrFixed, iters) {
 
 BENCHMARK(boost_splitOnSingleChar, iters) {
   static const std::string line = "one:two:three:four";
+  bool(*pred)(char) = [] (char c) -> bool { return c == ':'; };
   for (int i = 0; i < iters << 4; ++i) {
     std::vector<boost::iterator_range<std::string::const_iterator> > pieces;
-    boost::split(pieces, line, [] (char c) { return c == ':'; });
+    boost::split(pieces, line, pred);
   }
 }