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clause_iterator

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This commit is contained in:
Jakob Rath 2022-12-16 15:21:32 +01:00
parent 342774eff8
commit bf92fa4882
3 changed files with 93 additions and 46 deletions
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62
src/math/polysat/constraint_manager.h
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@ -126,9 +126,65 @@ namespace polysat {
constraint* const* begin() const { return m_constraints.data(); }
constraint* const* end() const { return m_constraints.data() + m_constraints.size(); }
using clause_iterator = decltype(m_clauses)::const_iterator;
clause_iterator clauses_begin() const { return m_clauses.begin(); }
clause_iterator clauses_end() const { return m_clauses.end(); }
class clause_iterator {
friend class constraint_manager;
using storage_t = decltype(constraint_manager::m_clauses);
using outer_iterator = storage_t::const_iterator;
outer_iterator outer_it;
outer_iterator outer_end;
using inner_iterator = storage_t::data_t::const_iterator;
inner_iterator inner_it;
inner_iterator inner_end;
clause_iterator(storage_t const& cls, bool begin) {
if (begin) {
outer_it = cls.begin();
outer_end = cls.end();
}
else {
outer_it = cls.end();
outer_end = cls.end();
}
begin_inner();
}
void begin_inner() {
if (outer_it == outer_end) {
inner_it = nullptr;
inner_end = nullptr;
}
else {
inner_it = outer_it->begin();
inner_end = outer_it->end();
}
}
public:
clause const& operator*() const {
return *inner_it->get();
}
clause_iterator& operator++() {
++inner_it;
while (inner_it == inner_end && outer_it != outer_end) {
++outer_it;
begin_inner();
}
return *this;
}
bool operator==(clause_iterator const& other) const {
return outer_it == other.outer_it && inner_it == other.inner_it;
}
bool operator!=(clause_iterator const& other) const {
return !operator==(other);
}
};
clause_iterator clauses_begin() const { return clause_iterator(m_clauses, true); }
clause_iterator clauses_end() const { return clause_iterator(m_clauses, false); }
class clauses_t {
constraint_manager const* m_cm;