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add proposed query interface

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This commit is contained in:
Jakob Rath 2023-07-18 15:07:53 +02:00
parent bac52313da
commit 4742985906
2 changed files with 25 additions and 41 deletions
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23
src/math/polysat/slicing.h
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@ -253,9 +253,26 @@ namespace polysat {
/** Extract reason for x == y */
void explain_equal(pvar x, pvar y, sat::literal_vector& out_lits, unsigned_vector& out_vars);
// TODO:
// Query for a given variable v:
// - set of variables that share at least one slice with v (need variable, offset/width relative to v)
/// Example:
/// - assume query_var has segments 11122233 and var has segments 2224
/// - then the overlapping region "222" is given by width = 3, offset_var = 1, offset_query = 2.
/// (First version will probably only support offset 0.)
struct var_overlap {
pvar var;
/// number of overlapping bits
unsigned width;
/// offset of overlapping region in var
unsigned offset_var;
/// offset of overlapping region in query variable
unsigned offset_query;
};
using var_overlap_vector = svector<var_overlap>;
/** For a given variable v, find the set of variables that share at least one slice with v. */
void query_overlaps(pvar v, var_overlap_vector& out);
/** Query fixed portions of the variable v */
void query_fixed(pvar v, rational& mask, rational& value);
std::ostream& display(std::ostream& out) const;
std::ostream& display_tree(std::ostream& out) const;