move include from .h into .cc
diff --git a/include/benchmark/complexity.h b/include/benchmark/complexity.h
index 1c9f591..72bd9e4 100644
--- a/include/benchmark/complexity.h
+++ b/include/benchmark/complexity.h
@@ -20,7 +20,6 @@
#include <string>
#include <vector>
-#include <functional>
namespace benchmark {
diff --git a/src/complexity.cc b/src/complexity.cc
index 4d21af8..67d8a05 100644
--- a/src/complexity.cc
+++ b/src/complexity.cc
@@ -18,6 +18,7 @@
#include "benchmark/complexity.h"
#include "check.h"
#include <math.h>
+#include <functional>
namespace benchmark {
@@ -153,4 +154,4 @@
return best_fit;
}
-} // end namespace benchmark
\ No newline at end of file
+} // end namespace benchmark
