X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Frelational.h;h=79f3cf33d9d7a47648439b7be79198b757bb6601;hp=c3b223b5eb0f494f722ffc25f20a10ce72de5431;hb=0cf43f3096cbcfc7472ff9c8927c6eb74f2eeb8c;hpb=e78622a06f749a124b007aa7b969de02fcc9c3d2

diff --git a/ginac/relational.h b/ginac/relational.h
index c3b223b5..79f3cf33 100644
--- a/ginac/relational.h
+++ b/ginac/relational.h
@@ -82,11 +82,20 @@ protected:
 };
 
 // utility functions
+
+/** Return the relational object handled by an ex.
+ *  This is unsafe: you need to check the type first. */
 inline const relational &ex_to_relational(const ex &e)
 {
 	return static_cast<const relational &>(*e.bp);
 }
 
+/** Specialization of is_exactly_a<relational>(obj) for relational objects. */
+template<> inline bool is_exactly_a<relational>(const basic & obj)
+{
+	return obj.tinfo()==TINFO_relational;
+}
+
 } // namespace GiNaC
 
 #endif // ndef __GINAC_RELATIONAL_H__