add missing header for std::tolower

This commit is contained in:
Thomas Fussell 2017-09-13 11:03:18 -04:00
parent b2adee9fd3
commit 4c2c7a5859

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@ -22,6 +22,7 @@
// @author: see AUTHORS file // @author: see AUTHORS file
#include <algorithm> #include <algorithm>
#include <cctype>
#include <cmath> #include <cmath>
#include <detail/default_case.hpp> #include <detail/default_case.hpp>