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