Z3 sources

Signed-off-by: Leonardo de Moura <leonardo@microsoft.com>

lib/expr_replacer.h

@@ -0,0 +1,62 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    expr_replacer.h
+
+Abstract:
+
+    Abstract (functor) for replacing expressions.
+
+Author:
+
+    Leonardo (leonardo) 2011-04-29
+
+Notes:
+
+--*/
+#ifndef _EXPR_REPLACER_H_
+#define _EXPR_REPLACER_H_
+
+#include"ast.h"
+#include"expr_substitution.h"
+#include"params.h"
+
+/**
+   \brief Abstract interface for functors that replace constants with expressions.
+*/
+class expr_replacer {
+    struct scoped_set_subst;
+public:
+    virtual ~expr_replacer() {}
+
+    virtual ast_manager & m() const = 0;
+    virtual void set_substitution(expr_substitution * s) = 0;
+
+    virtual void operator()(expr * t, expr_ref & result, proof_ref & result_pr, expr_dependency_ref & deps) = 0;
+    virtual void operator()(expr * t, expr_ref & result, proof_ref & result_pr);
+    virtual void operator()(expr * t, expr_ref & result);
+    virtual void operator()(expr_ref & t) { expr_ref s(t, m()); (*this)(s, t); }
+
+    void cancel() { set_cancel(true); }
+    void reset_cancel() { set_cancel(false); }
+    virtual void set_cancel(bool f) = 0;
+    virtual unsigned get_num_steps() const { return 0; }
+
+
+    void apply_substitution(expr * s, expr * def, proof * def_pr, expr_ref & t);
+    void apply_substitution(expr * s, expr * def, expr_ref & t);
+};
+
+/**
+   \brief Create a vanilla replacer. It just applies the substitution.
+*/
+expr_replacer * mk_default_expr_replacer(ast_manager & m);
+
+/**
+   \brief Apply substitution and simplify.
+*/
+expr_replacer * mk_expr_simp_replacer(ast_manager & m, params_ref const & p = params_ref());
+
+#endif