class scalar_products;
+class symmetry;
/** This class holds an indexed expression. It consists of a 'base' expression
* (the expression being indexed) which can be accessed as op(0), and n (n >= 0)
friend ex simplify_indexed(const ex & e, exvector & free_indices, exvector & dummy_indices, const scalar_products & sp);
friend ex simplify_indexed_product(const ex & e, exvector & free_indices, exvector & dummy_indices, const scalar_products & sp);
- // types
-public:
- /** Type of symmetry of the object with respect to commutation of its indices. */
- typedef enum {
- unknown, /**< symmetry properties unknown */
- symmetric, /**< totally symmetric */
- antisymmetric, /**< totally antisymmetric */
- mixed /**< mixed symmetry (unimplemented) */
- } symmetry_type;
-
// other constructors
public:
/** Construct indexed object with no index.
* @param i1 First index
* @param i2 Second index
* @return newly constructed indexed object */
- indexed(const ex & b, symmetry_type symm, const ex & i1, const ex & i2);
+ indexed(const ex & b, const symmetry & symm, const ex & i1, const ex & i2);
/** Construct indexed object with three indices and a specified symmetry.
* The indices must be of class idx.
* @param i2 Second index
* @param i3 Third index
* @return newly constructed indexed object */
- indexed(const ex & b, symmetry_type symm, const ex & i1, const ex & i2, const ex & i3);
+ indexed(const ex & b, const symmetry & symm, const ex & i1, const ex & i2, const ex & i3);
/** Construct indexed object with four indices and a specified symmetry. The
* indices must be of class idx.
* @param i3 Third index
* @param i4 Fourth index
* @return newly constructed indexed object */
- indexed(const ex & b, symmetry_type symm, const ex & i1, const ex & i2, const ex & i3, const ex & i4);
+ indexed(const ex & b, const symmetry & symm, const ex & i1, const ex & i2, const ex & i3, const ex & i4);
/** Construct indexed object with a specified vector of indices. The indices
* must be of class idx.
* @param symm Symmetry of indices
* @param iv Vector of indices
* @return newly constructed indexed object */
- indexed(const ex & b, symmetry_type symm, const exvector & iv);
+ indexed(const ex & b, const symmetry & symm, const exvector & iv);
// internal constructors
- indexed(symmetry_type symm, const exprseq & es);
- indexed(symmetry_type symm, const exvector & v, bool discardable = false);
- indexed(symmetry_type symm, exvector * vp); // vp will be deleted
+ indexed(const symmetry & symm, const exprseq & es);
+ indexed(const symmetry & symm, const exvector & v, bool discardable = false);
+ indexed(const symmetry & symm, exvector * vp); // vp will be deleted
// functions overriding virtual functions from base classes
public:
* with a given index. */
bool has_dummy_index_for(const ex & i) const;
+ /** Return symmetry properties. */
+ ex get_symmetry(void) const {return symtree;}
+
protected:
void printindices(const print_context & c, unsigned level) const;
- void assert_all_indices_of_type_idx(void) const;
+ void validate(void) const;
// member variables
protected:
- symmetry_type symmetry; /**< Index symmetry */
+ ex symtree; /**< Index symmetry (tree of symmetry objects) */
};