X-Git-Url: https://www.ginac.de/ginac.git//ginac.git?p=ginac.git;a=blobdiff_plain;f=ginac%2Fclifford.h;h=b6c88d9efa79a0f4060264f102428af7dbb6b952;hp=487c12d7f7d1e539d8252ea6a7ffcc98093bfeea;hb=9bf900398c9e10c1cd486377038c24f9410fcb08;hpb=c8f1702a09070f7d0d64118a0a3405521affb2cb

diff --git a/ginac/clifford.h b/ginac/clifford.h
index 487c12d7..b6c88d9e 100644
--- a/ginac/clifford.h
+++ b/ginac/clifford.h
@@ -48,7 +48,11 @@ public:
 	clifford(unsigned char rl, exvector * vp); // vp will be deleted
 
 	// functions overriding virtual functions from base classes
+public:
+	void print(const print_context & c, unsigned level = 0) const;
+
 protected:
+	bool match_same_type(const basic & other) const;
 	ex simplify_ncmul(const exvector & v) const;
 	ex thisexprseq(const exvector & v) const;
 	ex thisexprseq(exvector * vp) const;
@@ -70,7 +74,7 @@ class diracone : public tensor
 {
 	GINAC_DECLARE_REGISTERED_CLASS(diracone, tensor)
 
-	// functions overriding virtual functions from bases classes
+	// functions overriding virtual functions from base classes
 public:
 	void print(const print_context & c, unsigned level = 0) const;
 };
@@ -81,7 +85,7 @@ class diracgamma : public tensor
 {
 	GINAC_DECLARE_REGISTERED_CLASS(diracgamma, tensor)
 
-	// functions overriding virtual functions from bases classes
+	// functions overriding virtual functions from base classes
 public:
 	void print(const print_context & c, unsigned level = 0) const;
 	bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const;
@@ -94,19 +98,20 @@ class diracgamma5 : public tensor
 {
 	GINAC_DECLARE_REGISTERED_CLASS(diracgamma5, tensor)
 
-	// functions overriding virtual functions from bases classes
+	// functions overriding virtual functions from base classes
 public:
 	void print(const print_context & c, unsigned level = 0) const;
 };
 
 
 // global functions
-inline const clifford &ex_to_clifford(const ex &e)
+
+/** Specialization of is_exactly_a<clifford>(obj) for clifford objects. */
+template<> inline bool is_exactly_a<clifford>(const basic & obj)
 {
-	return static_cast<const clifford &>(*e.bp);
+	return obj.tinfo()==TINFO_clifford;
 }
 
-
 /** Create a Clifford unity object.
  *
  *  @param rl Representation label
@@ -151,7 +156,7 @@ ex dirac_trace(const ex & e, unsigned char rl = 0, const ex & trONE = 4);
 
 /** Bring all products of clifford objects in an expression into a canonical
  *  order. This is not necessarily the most simple form but it will allow
- *  to checking two expressions for equality. */
+ *  to check two expressions for equality. */
 ex canonicalize_clifford(const ex & e);
 
 } // namespace GiNaC