z3-z3-4.13.0.src.ast.rewriter.push_app_ite.h Maven / Gradle / Ivy
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/*++
Copyright (c) 2006 Microsoft Corporation
Module Name:
push_app_ite.h
Abstract:
Author:
Leonardo de Moura (leonardo) 2008-05-14.
Revision History:
--*/
#pragma once
#include "ast/ast.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))
*/
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): m(m), m_conservative(true) {}
virtual ~push_app_ite_cfg() = default;
void set_conservative(bool c) { m_conservative = c; }
bool rewrite_patterns() const { return false; }
};
/**
\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
completely 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:
bool is_target(func_decl * decl, unsigned num_args, expr * const * args) override;
public:
ng_push_app_ite_cfg(ast_manager& m): push_app_ite_cfg(m) {}
};
struct push_app_ite_rw : public rewriter_tpl {
push_app_ite_cfg m_cfg;
public:
push_app_ite_rw(ast_manager& m):
rewriter_tpl(m, m.proofs_enabled(), m_cfg),
m_cfg(m)
{}
void set_conservative(bool c) { m_cfg.set_conservative(c); }
};
struct ng_push_app_ite_rw : public rewriter_tpl {
ng_push_app_ite_cfg m_cfg;
public:
ng_push_app_ite_rw(ast_manager& m):
rewriter_tpl(m, m.proofs_enabled(), m_cfg),
m_cfg(m)
{}
void set_conservative(bool c) { m_cfg.set_conservative(c); }
};