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Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>
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Leonardo de Moura 2012-10-02 11:35:25 -07:00
parent 3f9edad676
commit e9eab22e5c
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lib/smt_literal.cpp Normal file
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/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
smt_literal.cpp
Abstract:
<abstract>
Author:
Leonardo de Moura (leonardo) 2008-02-18.
Revision History:
--*/
#include"smt_literal.h"
#include"ast_pp.h"
#include"ast_ll_pp.h"
namespace smt {
void literal::display(std::ostream & out, ast_manager & m, expr * const * bool_var2expr_map) const {
if (*this == true_literal)
out << "true";
else if (*this == false_literal)
out << "false";
else if (sign())
out << "(not " << mk_pp(bool_var2expr_map[var()], m) << ")";
else
out << mk_pp(bool_var2expr_map[var()], m);
}
void literal::display_compact(std::ostream & out, expr * const * bool_var2expr_map) const {
if (*this == true_literal)
out << "true";
else if (*this == false_literal)
out << "false";
else if (sign())
out << "(not #" << bool_var2expr_map[var()]->get_id() << ")";
else
out << "#" << bool_var2expr_map[var()]->get_id();
}
std::ostream & operator<<(std::ostream & out, literal l) {
if (l == true_literal)
out << "true";
else if (l == false_literal)
out << "false";
else if (l.sign())
out << "(not p" << l.var() << ")";
else
out << "p" << l.var();
return out;
}
std::ostream & operator<<(std::ostream & out, const literal_vector & v) {
display(out, v.begin(), v.end());
return out;
}
void display_compact(std::ostream & out, unsigned num_lits, literal const * lits, expr * const * bool_var2expr_map) {
for (unsigned i = 0; i < num_lits; i++) {
if (i > 0)
out << " ";
lits[i].display_compact(out, bool_var2expr_map);
}
}
void display_verbose(std::ostream & out, ast_manager& m, unsigned num_lits, literal const * lits, expr * const * bool_var2expr_map) {
for (unsigned i = 0; i < num_lits; i++) {
if (i > 0)
out << " ";
lits[i].display(out, m, bool_var2expr_map);
}
}
/**
\brief Return true if lits1 subsumes lits2.
That is every literal in lits1 is in lits2
*/
bool backward_subsumption(unsigned num_lits1, literal const * lits1, unsigned num_lits2, literal const * lits2) {
unsigned i = 0;
for (; i < num_lits1; i++) {
literal l1 = lits1[i];
unsigned j = 0;
for (; j < num_lits2; j++)
if (l1 == lits2[j])
break;
if (j == num_lits2)
break;
}
return i == num_lits1;
}
};