Fix appveyor build

Explicitly include <functional> for std::greater.

diff --git a/src/position.h b/src/position.h
index 1079764..e225bf7 100644 (file)
--- a/src/position.h
+++ b/src/position.h
@@ -25,6 +25,7 @@
 #include <deque>
 #include <memory> // For std::unique_ptr
 #include <string>
+#include <functional>
 
 #include "bitboard.h"
 #include "types.h"

diff --git a/src/variant.h b/src/variant.h
index 82f695d..ab58036 100644 (file)
--- a/src/variant.h
+++ b/src/variant.h
@@ -25,6 +25,7 @@
 #include <map>
 #include <vector>
 #include <string>
+#include <functional>
 
 #include "types.h"
 #include "bitboard.h"