wip - converting the equation solver as a simplifier

src/ast/simplifiers/extract_eqs.h

@@ -0,0 +1,47 @@
+/*++
+Copyright (c) 2022 Microsoft Corporation
+
+Module Name:
+
+    extract_eqs.h
+
+Abstract:
+
+    simplifier for solving equations
+
+Author:
+
+    Nikolaj Bjorner (nbjorner) 2022-11-2.
+
+--*/
+
+
+#pragma once
+
+#include "ast/simplifiers/dependent_expr_state.h"
+#include "ast/rewriter/th_rewriter.h"
+#include "ast/expr_substitution.h"
+#include "util/scoped_ptr_vector.h"
+
+
+namespace euf {
+
+    struct dependent_eq {
+        app* var;
+        expr_ref term;
+        expr_dependency* dep;
+        dependent_eq(app* var, expr_ref& term, expr_dependency* d) : var(var), term(term), dep(d) {}
+    };
+
+    typedef vector<dependent_eq> dep_eq_vector;
+
+    class extract_eq {
+    public:
+        virtual ~extract_eq() {}
+        virtual void get_eqs(dependent_expr const& e, dep_eq_vector& eqs) = 0;
+        virtual void pre_process(dependent_expr_state& fmls) {}
+    };
+
+    void register_extract_eqs(ast_manager& m, scoped_ptr_vector<extract_eq>& ex);
+
+}