ex coeff; ///< second member of pair, must be numeric
};
-/** Function objects for insertion into third argument of STL's sort() etc. */
+/** Function object for insertion into third argument of STL's sort() etc. */
struct expair_is_less : public std::binary_function<expair, expair, bool> {
bool operator()(const expair &lh, const expair &rh) const { return lh.is_less(rh); }
};
+/** Function object not caring about the numerical coefficients for insertion
+ * into third argument of STL's sort(). Note that this does not define a
+ * strict weak ordering since for any symbol x we have neither 3*x<2*x or
+ * 2*x<3*x. Handle with care! */
+struct expair_rest_is_less : public std::binary_function<expair, expair, bool> {
+ bool operator()(const expair &lh, const expair &rh) const { return (lh.rest.compare(rh.rest)<0); }
+};
+
struct expair_swap : public std::binary_function<expair, expair, void> {
void operator()(expair &lh, expair &rh) const { lh.swap(rh); }
};
expairseq::expairseq(const epvector &v, const ex &oc)
: inherited(TINFO_expairseq), overall_coeff(oc)
{
+ GINAC_ASSERT(is_a<numeric>(oc));
construct_from_epvector(v);
GINAC_ASSERT(is_canonical());
}
: inherited(TINFO_expairseq), overall_coeff(oc)
{
GINAC_ASSERT(vp!=0);
+ GINAC_ASSERT(is_a<numeric>(oc));
construct_from_epvector(*vp);
delete vp;
GINAC_ASSERT(is_canonical());
/** Brings this expairseq into a sorted (canonical) form. */
void expairseq::canonicalize(void)
{
- std::sort(seq.begin(), seq.end(), expair_is_less());
+ std::sort(seq.begin(), seq.end(), expair_rest_is_less());
}