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54 lines
1.2 KiB
C++
54 lines
1.2 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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cached_var_subst.h
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Abstract:
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<abstract>
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Author:
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Leonardo de Moura (leonardo) 2009-01-23.
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Revision History:
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--*/
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#ifndef _CACHED_VAR_SUBST_H_
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#define _CACHED_VAR_SUBST_H_
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#include"var_subst.h"
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#include"map.h"
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#include"smt_enode.h"
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class cached_var_subst {
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struct key {
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quantifier * m_qa;
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unsigned m_num_bindings;
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expr * m_bindings[0];
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};
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struct key_hash_proc {
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unsigned operator()(key * k) const {
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return string_hash(reinterpret_cast<char const *>(k->m_bindings), sizeof(expr *) * k->m_num_bindings, k->m_qa->get_id());
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}
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};
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struct key_eq_proc {
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bool operator()(key * k1, key * k2) const;
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};
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typedef map<key *, expr *, key_hash_proc, key_eq_proc> instances;
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var_subst m_proc;
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expr_ref_vector m_refs;
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instances m_instances;
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region m_region;
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ptr_vector<key> m_new_keys; // mapping from num_bindings -> next key
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public:
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cached_var_subst(ast_manager & m);
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void operator()(quantifier * qa, unsigned num_bindings, smt::enode * const * bindings, expr_ref & result);
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void reset();
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};
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#endif /* _CACHED_VAR_SUBST_H_ */
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