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using rewrite in push_app_ite

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Signed-off-by: Nikolaj Bjorner <nbjorner@microsoft.com>
This commit is contained in:
Nikolaj Bjorner 2017-08-23 17:57:03 -07:00
parent f91496f5ff
commit 8b2d60e3ca
5 changed files with 187 additions and 7 deletions
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43
src/ast/simplifier/push_app_ite.h
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@ -21,6 +21,7 @@ Revision History:
#include "ast/ast.h"
#include "ast/simplifier/simplifier.h"
#include "ast/rewriter/rewriter.h"
/**
\brief Functor for applying the following transformation:
@ -30,7 +31,6 @@ Revision History:
class push_app_ite : public simplifier {
protected:
bool m_conservative;
int has_ite_arg(unsigned num_args, expr * const * args);
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);
@ -59,5 +59,46 @@ public:
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_ */