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slicing: prepare for explain()

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This commit is contained in:
Jakob Rath 2023-06-28 09:59:04 +02:00
parent 0c62b81a56
commit 947335e147
3 changed files with 118 additions and 39 deletions
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15
src/util/sat_literal.h
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@ -30,7 +30,7 @@ namespace sat {
typedef svector<bool_var> bool_var_vector;
const bool_var null_bool_var = UINT_MAX >> 1;
inline constexpr bool_var null_bool_var = UINT_MAX >> 1;
/**
\brief The literal b is represented by the value 2*b, and
@ -39,8 +39,11 @@ namespace sat {
class literal {
unsigned m_val;
public:
literal():m_val(null_bool_var << 1) {
SASSERT(var() == null_bool_var && !sign());
constexpr literal(): m_val(null_bool_var << 1) {
#ifdef Z3DEBUG
assert(var() == null_bool_var);
assert(!sign());
#endif
}
explicit literal(bool_var v, bool _sign = false):
@ -49,11 +52,11 @@ namespace sat {
SASSERT(sign() == _sign);
}
bool_var var() const {
constexpr bool_var var() const {
return m_val >> 1;
}
bool sign() const {
constexpr bool sign() const {
return m_val & 1ul;
}
@ -86,7 +89,7 @@ namespace sat {
friend bool operator!=(literal const & l1, literal const & l2);
};
const literal null_literal;
inline constexpr literal null_literal;
using literal_hash = obj_hash<literal>;
inline literal to_literal(unsigned x) { literal l; l.m_val = x; return l; }