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64 lines
1.7 KiB
C++
64 lines
1.7 KiB
C++
/*++
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Copyright (c) 2006 Microsoft Corporation
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Module Name:
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smt_quantifier_instances.h
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Abstract:
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<abstract>
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Author:
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Leonardo de Moura (leonardo) 2008-03-26.
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Revision History:
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--*/
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#pragma once
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namespace smt {
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class quantifier_instances;
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class quantifier_instance {
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quantifier * m_quantifier;
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double m_cost;
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enode * m_enodes[0];
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quantifier_instance(quantifier * q, enode * const * enodes);
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friend class quantifier_instances;
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public:
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quantifier * get_quantifier() const { return m_quantifier; }
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unsigned get_num_decls() const { return m_quantifier->get_num_decls(); }
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double get_cost() const { return m_cost; }
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enode * const * get_enodes() const { return m_enodes; }
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bool operator==(quantifier_instance const & other) const;
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unsigned hash() const;
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};
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class quantifier_instances {
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struct instance_lt {
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ptr_vector<quantifier_instance> const & m_stack;
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instance_lt(ptr_vector<quantifier_instance> const & s):
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m_stack(s) {
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}
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bool operator()(int i1, int i2) const {
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return m_stack[i1]->get_cost() < m_stack[i2]->get_cost();
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}
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};
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context & m_context;
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ast_manager & m_manager;
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obj_hashtable<quantifier_instance> m_instances; //!< Set of instances.
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ptr_vector<quantifier_instance> m_stack; //!< Stack for backtracking.
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heap<instance_lt> m_queue; //!< Instantiation priority queue.
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unsigned_vector m_scopes;
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};
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};
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