[C++17] Remove inheritance from std::binary_function, std::unary_function.

[ginac.git] / ginac / symmetry.cpp

diff --git a/ginac/symmetry.cpp b/ginac/symmetry.cpp
index c8c27a03c1221c4463d3c8f84c477de691234ecf..614b11736136dea1b83ad1c1be93977c03122c09 100644 (file)
--- a/ginac/symmetry.cpp
+++ b/ginac/symmetry.cpp
@@ -389,7 +389,7 @@ const symmetry & antisymmetric4()
        return ex_to<symmetry>(s);
 }
 
-class sy_is_less : public std::binary_function<ex, ex, bool> {
+class sy_is_less {
        exvector::iterator v;
 
 public:
@@ -413,7 +413,7 @@ public:
        }
 };
 
-class sy_swap : public std::binary_function<ex, ex, void> {
+class sy_swap {
        exvector::iterator v;
 
 public: