Remove exhashmap<T> class.

[ginac.git] / ginac / ex.h

diff --git a/ginac/ex.h b/ginac/ex.h
index 606cd9d8e87ffc188441670fe1ff929ffadb02b1..dd3cfe0530ae51f33e72db25bde99fac7760f2e2 100644 (file)
--- a/ginac/ex.h
+++ b/ginac/ex.h
@@ -962,6 +962,26 @@ inline void swap(GiNaC::ex &a, GiNaC::ex &b)
        a.swap(b);
 }
 
+/** Specialization of std::hash() for ex objects. */
+template<>
+struct hash<GiNaC::ex>
+{
+       std::size_t operator()(const GiNaC::ex & e) const noexcept
+       {
+               return e.gethash();
+       }
+};
+
+/** Specialization of std::equal_to() for ex objects. */
+template<>
+struct equal_to<GiNaC::ex>
+{
+       bool operator()(const GiNaC::ex &e1, const GiNaC::ex &e2) const noexcept
+       {
+               return e1.is_equal(e2);
+       }
+};
+
 } // namespace std
 
 #endif // ndef GINAC_EX_H