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Remove sgraph dependency from seq_plugin, let sgraph register nodes via on_make callback

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Co-authored-by: NikolajBjorner <3085284+NikolajBjorner@users.noreply.github.com>
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copilot-swe-agent[bot] 2026-03-01 23:50:48 +00:00
parent b8656d4fbe
commit 6ef3be4e5e
3 changed files with 44 additions and 27 deletions
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17
src/ast/euf/euf_seq_plugin.h
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@ -26,8 +26,9 @@ Abstract:
-- Nullable absorption: a nullable token adjacent to .*
is absorbed, u.*.v.w = u.*.w when v is nullable.
The plugin integrates with euf_egraph for congruence closure
and with sgraph for snode-based string representation.
The plugin integrates with euf_egraph for congruence closure.
Node registration in sgraph is handled by sgraph itself via
the egraph's on_make callback, not by the plugin.
Author:
@ -44,7 +45,6 @@ Author:
namespace euf {
class egraph;
class sgraph;
class seq_plugin : public plugin {
@ -53,7 +53,6 @@ namespace euf {
};
seq_util m_seq;
sgraph& m_sg;
svector<undo_kind> m_undo;
// queue of merges and registrations to process
@ -90,8 +89,9 @@ namespace euf {
// merging Kleene stars, merging loops, absorbing nullables
void propagate_simplify(enode* n);
// check if snode is nullable via sgraph metadata
bool is_nullable(enode* n);
// check if expression is nullable, computed from expression structure
bool is_nullable(expr* e);
bool is_nullable(enode* n) { return is_nullable(n->get_expr()); }
// check if two enodes have congruent star bodies
bool same_star_body(enode* a, enode* b);
@ -100,7 +100,7 @@ namespace euf {
bool same_loop_body(enode* a, enode* b, unsigned& lo1, unsigned& hi1, unsigned& lo2, unsigned& hi2);
public:
seq_plugin(egraph& g, sgraph& sg);
seq_plugin(egraph& g);
theory_id get_id() const override { return m_seq.get_family_id(); }
@ -117,8 +117,5 @@ namespace euf {
std::ostream& display(std::ostream& out) const override;
void collect_statistics(statistics& st) const override;
sgraph& get_sgraph() { return m_sg; }
sgraph const& get_sgraph() const { return m_sg; }
};
}