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add public access to bijection key_val iterator

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Signed-off-by: Lev Nachmanson <levnach@hotmail.com>
This commit is contained in:
Lev Nachmanson 2025-03-18 09:54:02 -07:00 • committed by Lev Nachmanson
parent 8b5510bcd6
commit fc1c8c4cc4
1 changed files with 16 additions and 3 deletions
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19
src/math/lp/dioph_eq.cpp
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@ -60,10 +60,23 @@ namespace lp {
iv(const mpq& v, unsigned j) : m_coeff(v), m_j(j) {}
};
struct bijection {
class bijection {
std::unordered_map<unsigned, unsigned> m_map;
std::unordered_map<unsigned, unsigned> m_rev_map;
public:
auto map_begin() const { return m_map.begin(); }
auto map_end() const { return m_map.end(); }
// Iterator helper
struct map_it {
const bijection& m_bij;
auto begin() const { return m_bij.map_begin(); }
auto end() const { return m_bij.map_end(); }
};
// Add a method to get iterators over the key->val map (complementing key_val)
map_it key_val_pairs() const { return {*this}; }
void add(unsigned a, unsigned b) {
SASSERT(!contains(m_map, a) && !contains(m_rev_map, b));
m_map[a] = b;
@ -968,8 +981,8 @@ namespace lp {
void remove_irrelevant_fresh_defs() {
std_vector<unsigned> xt_to_remove;
std_vector<unsigned> rows_to_remove_the_defs_from;
for (const auto& p : m_fresh_k2xt_terms.m_bij.m_rev_map) {
unsigned xt = p.first;
for (const auto& p : m_fresh_k2xt_terms.m_bij.key_val_pairs()) {
unsigned xt = p.second;
if (xt >= m_e_matrix.column_count()) {
xt_to_remove.push_back(xt);
rows_to_remove_the_defs_from.push_back(m_fresh_k2xt_terms.get_by_val(xt).second);