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41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
/*++
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Copyright (c) 2011 Microsoft Corporation
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Module Name:
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theory_seq_empty.h
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Abstract:
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<abstract>
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Author:
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Nikolaj Bjorner (nbjorner) 2011-14-11
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Revision History:
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--*/
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#ifndef THEORY_SEQ_EMPTY_H_
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#define THEORY_SEQ_EMPTY_H_
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#include "smt_theory.h"
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namespace smt {
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class theory_seq_empty : public theory {
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bool m_used;
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virtual final_check_status final_check_eh() { return m_used?FC_GIVEUP:FC_DONE; }
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virtual bool internalize_atom(app*, bool) { if (!m_used) { get_context().push_trail(value_trail<context,bool>(m_used)); m_used = true; } return false; }
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virtual bool internalize_term(app*) { return internalize_atom(0,false); }
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virtual void new_eq_eh(theory_var, theory_var) { }
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virtual void new_diseq_eh(theory_var, theory_var) {}
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virtual theory* mk_fresh(context*) { return alloc(theory_seq_empty, get_manager()); }
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virtual char const * get_name() const { return "seq-empty"; }
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public:
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theory_seq_empty(ast_manager& m):theory(m.mk_family_id("seq")), m_used(false) {}
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};
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};
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#endif /* THEORY_SEQ_EMPTY_H_ */
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