* Change section about Square-free decomposition reflecting the recent

[ginac.git] / ginac / tensor.h

diff --git a/ginac/tensor.h b/ginac/tensor.h
index 5698b9b944450e44852b3571cb610dd0051b95ec..02496ad9da5da77cdc1e38b8e7cdb76da5e7f5d6 100644 (file)
--- a/ginac/tensor.h
+++ b/ginac/tensor.h
@@ -37,9 +37,9 @@ class tensor : public basic
 
        // other constructors
 protected:
-       tensor(unsigned ti);
+       tensor(unsigned ti) : inherited(ti) {}
 
-       // functions overriding virtual functions from bases classes
+       // functions overriding virtual functions from base classes
 protected:
        unsigned return_type(void) const { return return_types::noncommutative_composite; }
 };
@@ -51,7 +51,7 @@ class tensdelta : public tensor
 {
        GINAC_DECLARE_REGISTERED_CLASS(tensdelta, 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;
        ex eval_indexed(const basic & i) const;
@@ -66,7 +66,7 @@ class tensmetric : public tensor
 {
        GINAC_DECLARE_REGISTERED_CLASS(tensmetric, 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;
        ex eval_indexed(const basic & i) const;
@@ -86,7 +86,7 @@ public:
        /** Construct Lorentz metric tensor with given signature. */
        minkmetric(bool pos_sig);
 
-       // 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;
        ex eval_indexed(const basic & i) const;
@@ -105,7 +105,7 @@ class spinmetric : public tensmetric
 {
        GINAC_DECLARE_REGISTERED_CLASS(spinmetric, tensmetric)
 
-       // 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;
        ex eval_indexed(const basic & i) const;
@@ -124,10 +124,11 @@ class tensepsilon : public tensor
 public:
        tensepsilon(bool minkowski, bool pos_sig);
 
-       // 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;
        ex eval_indexed(const basic & i) const;
+       bool contract_with(exvector::iterator self, exvector::iterator other, exvector & v) const;
 
        // member variables
 private:
@@ -137,10 +138,6 @@ private:
 
 
 // utility functions
-inline const tensor &ex_to_tensor(const ex &e)
-{
-       return static_cast<const tensor &>(*e.bp);
-}
 
 /** Create a delta tensor with specified indices. The indices must be of class
  *  idx or a subclass. The delta tensor is always symmetric and its trace is