Use constexpr when makes sense

[stockfish] / src / movegen.h

diff --git a/src/movegen.h b/src/movegen.h
index 8ae80118783c626dba484598282f5abb2653e99a..daee502d8ccfae5badf28894f28f1fc38317c1c9 100644 (file)
--- a/src/movegen.h
+++ b/src/movegen.h
@@ -42,6 +42,10 @@ struct ExtMove {
 
   operator Move() const { return move; }
   void operator=(Move m) { move = m; }
+
+  // Inhibit unwanted implicit conversions to Move
+  // with an ambiguity that yields to a compile error.
+  operator float() const = delete;
 };
 
 inline bool operator<(const ExtMove& f, const ExtMove& s) {