X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fidx.h;h=985226d72d441b9c604c478ff801b0e642f410f7;hp=b6e63e0717f8538cc9e9c8c25004c043ed775412;hb=1b48bfdf43c8d104cb8b06147f27cb9efe42cb16;hpb=4da7fb29afd5387b466390864d1fc3601f50879f

diff --git a/ginac/idx.h b/ginac/idx.h
index b6e63e07..985226d7 100644
--- a/ginac/idx.h
+++ b/ginac/idx.h
@@ -59,6 +59,7 @@ public:
 protected:
 	ex derivative(const symbol & s) const;
 	bool match_same_type(const basic & other) const;
+	unsigned calchash() const;
 
 	// new virtual functions in this class
 public: