move pull/push files

Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>

src/ast/rewriter/push_app_ite.h

@@ -0,0 +1,104 @@
+/*++
+Copyright (c) 2006 Microsoft Corporation
+
+Module Name:
+
+    push_app_ite.h
+
+Abstract:
+
+    <abstract>
+
+Author:
+
+    Leonardo de Moura (leonardo) 2008-05-14.
+
+Revision History:
+
+--*/
+#ifndef PUSH_APP_ITE_H_
+#define PUSH_APP_ITE_H_
+
+#include "ast/ast.h"
+#include "ast/simplifier/simplifier.h"
+#include "ast/rewriter/rewriter.h"
+
+/**
+   \brief Functor for applying the following transformation:
+
+   (f s (ite c t1 t2)) ==> (ite c (f s t1) (f s t2))
+*/
+class push_app_ite : public simplifier {
+protected:
+    bool          m_conservative;
+    void apply(func_decl * decl, unsigned num_args, expr * const * args, expr_ref & result);
+    virtual bool is_target(func_decl * decl, unsigned num_args, expr * const * args);
+    void reduce_core(expr * n);
+    bool visit_children(expr * n);
+    void reduce1(expr * n);
+    void reduce1_app(app * n);
+    void reduce1_quantifier(quantifier * q);
+
+public:
+    push_app_ite(simplifier & s, bool conservative = true);
+    virtual ~push_app_ite();
+    void operator()(expr * s, expr_ref & r, proof_ref & p);
+};
+
+/**
+   \brief Variation of push_app_ite that applies the transformation on nonground terms only.
+
+   \remark This functor uses the app::is_ground method. This method is not
+   completly precise, for instance, any term containing a quantifier is marked as non ground.
+*/
+class ng_push_app_ite : public push_app_ite {
+protected:
+    virtual bool is_target(func_decl * decl, unsigned num_args, expr * const * args);
+public:
+    ng_push_app_ite(simplifier & s, bool conservative = true);
+    virtual ~ng_push_app_ite() {}
+};
+
+struct push_app_ite_cfg : public default_rewriter_cfg {
+    ast_manager& m;
+    bool m_conservative;
+    virtual bool is_target(func_decl * decl, unsigned num_args, expr * const * args);
+    br_status reduce_app(func_decl * f, unsigned num, expr * const * args, expr_ref & result, proof_ref & result_pr);
+    push_app_ite_cfg(ast_manager& m, bool conservative = true): m(m), m_conservative(conservative) {}
+};
+
+/**
+   \brief Variation of push_app_ite that applies the transformation on nonground terms only.
+
+   \remark This functor uses the app::is_ground method. This method is not
+   completly precise, for instance, any term containing a quantifier is marked as non ground.
+*/
+class ng_push_app_ite_cfg : public push_app_ite_cfg {
+protected:
+    virtual bool is_target(func_decl * decl, unsigned num_args, expr * const * args);
+public:
+    ng_push_app_ite_cfg(ast_manager& m, bool conservative = true): push_app_ite_cfg(m, conservative) {}
+    virtual ~ng_push_app_ite_cfg() {}
+};
+
+struct push_app_ite_rw : public rewriter_tpl<push_app_ite_cfg> {
+    push_app_ite_cfg m_cfg;
+public:
+    push_app_ite_rw(ast_manager& m, bool conservative = true):
+        rewriter_tpl<push_app_ite_cfg>(m, m.proofs_enabled(), m_cfg),
+        m_cfg(m, conservative)
+    {}
+};
+
+struct ng_push_app_ite_rw : public rewriter_tpl<ng_push_app_ite_cfg> {
+    ng_push_app_ite_cfg m_cfg;
+public:
+    ng_push_app_ite_rw(ast_manager& m, bool conservative = true):
+        rewriter_tpl<ng_push_app_ite_cfg>(m, m.proofs_enabled(), m_cfg),
+        m_cfg(m, conservative)
+    {}
+};
+
+
+#endif /* PUSH_APP_ITE_H_ */
+