Z3 sources

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

lib/name_exprs.h

@@ -0,0 +1,65 @@
+/*++
+Copyright (c) 2011 Microsoft Corporation
+
+Module Name:
+
+    name_exprs.h
+
+Abstract:
+
+    Goodies for naming nested expressions.
+
+Author:
+
+    Leonardo (leonardo) 2011-10-06
+
+Notes:
+
+--*/
+#ifndef _NAME_EXPRS_H_
+#define _NAME_EXPRS_H_
+
+#include"ast.h"
+#include"defined_names.h"
+
+class expr_predicate {
+public:
+    virtual bool operator()(expr * t) = 0;
+};
+
+class name_exprs {
+public:
+    virtual ~name_exprs() {}
+    virtual void operator()(expr * n,                          // [IN] expression that contain the sub-expressions to be named
+                            expr_ref_vector & new_defs,        // [OUT] new definitions
+                            proof_ref_vector & new_def_proofs, // [OUT] proofs of the new definitions 
+                            expr_ref & r,                      // [OUT] resultant expression
+                            proof_ref & p                      // [OUT] proof for (iff n p)
+                            ) = 0;
+    
+    virtual void set_cancel(bool f) = 0;
+    void cancel() { set_cancel(true); }
+    void reset_cancel() { set_cancel(false); }
+    virtual void reset() = 0;
+};
+
+/**
+   \brief Create an expression "namer" that will create replace nested expressions that satisfy pred with new
+   fresh declarations.
+*/
+name_exprs * mk_expr_namer(ast_manager & m, defined_names & n, expr_predicate & pred);
+
+/**
+   \brief Create an expression "namer" that will replace quantifiers and labels with new fresh declarations.
+*/
+name_exprs * mk_quantifier_label_namer(ast_manager & m, defined_names & n);
+
+/**
+   \brief Create an expression "namer" that will replace all nested formulas and term if-then-elses with 
+   fresh declarations.
+*/
+name_exprs * mk_nested_formula_namer(ast_manager & m, defined_names & n);
+
+void del_name_exprs(name_exprs * functor);
+
+#endif