add missing header

This commit is contained in:
Thomas Fussell 2016-06-11 10:03:58 -04:00
parent e3632da830
commit 2d28cd93e5

View File

@ -22,6 +22,7 @@
// @license: http://www.opensource.org/licenses/mit-license.php
// @author: see AUTHORS file
#include <algorithm>
#include <cctype> // for std::tolower
#include <unordered_set>
#include <utility> // for std::move