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consolidate literals

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This commit is contained in:
Nikolaj Bjorner 2021-05-20 12:58:27 -07:00
parent c959e28d4a
commit 03d2c5f3d0
9 changed files with 299 additions and 323 deletions
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87
src/smt/smt_literal.h
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@ -21,90 +21,30 @@ Revision History:
#include "ast/ast.h"
#include "smt/smt_types.h"
#include "util/approx_set.h"
#include "util/sat_literal.h"
namespace smt {
/**
\brief The literal b is represented by the value 2*b, and
the literal (not b) by the value 2*b + 1
*/
class literal {
int m_val;
public:
literal():m_val(-2) {
SASSERT(var() == null_bool_var && !sign());
}
explicit literal(bool_var v, bool sign = false):
m_val((v << 1) + static_cast<int>(sign)) {
}
bool_var var() const {
return m_val >> 1;
}
bool sign() const {
return m_val & 1;
}
int index() const {
return m_val;
}
void neg() {
m_val = m_val ^ 1;
}
friend literal operator~(literal l);
friend literal to_literal(int x);
void display(std::ostream & out, ast_manager & m, expr * const * bool_var2expr_map) const;
typedef sat::literal literal;
inline literal to_literal(int x) { return sat::to_literal(x); }
void display_smt2(std::ostream & out, ast_manager & m, expr * const * bool_var2expr_map) const;
void display_compact(std::ostream & out, expr * const * bool_var2expr_map) const;
unsigned hash() const { return m_val; }
};
inline bool operator==(literal l1, literal l2) {
return l1.index() == l2.index();
}
inline bool operator!=(literal l1, literal l2) {
return l1.index() != l2.index();
}
inline bool operator<(literal l1, literal l2) {
return l1.index() < l2.index();
}
inline literal operator~(literal l) {
literal r;
r.m_val = l.m_val ^ 1;
return r;
}
inline literal to_literal(int x) {
literal l;
l.m_val = x;
return l;
}
const literal null_literal;
const literal true_literal(true_bool_var, false);
const literal false_literal(true_bool_var, true);
typedef svector<literal> literal_vector;
typedef sbuffer<literal> literal_buffer;
std::ostream & operator<<(std::ostream & out, literal l);
std::ostream & operator<<(std::ostream & out, const literal_vector & v);
void display_compact(std::ostream & out, unsigned num_lits, literal const * lits, expr * const * bool_var2expr_map);
std::ostream& display(std::ostream & out, literal lit, ast_manager & m, expr * const * bool_var2expr_map);
std::ostream& display_smt2(std::ostream & out, literal lit, ast_manager & m, expr * const * bool_var2expr_map);
std::ostream& display_compact(std::ostream & out, literal lit, expr * const * bool_var2expr_map);
void display_verbose(std::ostream & out, ast_manager& m, unsigned num_lits, literal const * lits, expr * const * bool_var2expr_map, char const* sep = "\n");
std::ostream& display_compact(std::ostream & out, unsigned num_lits, literal const * lits, expr * const * bool_var2expr_map);
std::ostream& display_verbose(std::ostream & out, ast_manager& m, unsigned num_lits, literal const * lits, expr * const * bool_var2expr_map, char const* sep = "\n");
template<typename T>
void neg_literals(unsigned num_lits, literal const * lits, T & result) {
@ -112,9 +52,6 @@ namespace smt {
result.push_back(~lits[i]);
}
struct literal2unsigned { unsigned operator()(literal l) const { return l.index(); } };
typedef approx_set_tpl<literal, literal2unsigned> literal_approx_set;
bool backward_subsumption(unsigned num_lits1, literal const * lits1, unsigned num_lits2, literal const * lits2);
};