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48 lines
1.4 KiB
C++
48 lines
1.4 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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#pragma once
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#include "ast/seq_decl_plugin.h"
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#include "model/seq_factory.h"
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#include "smt/smt_theory.h"
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#include "smt/smt_model_generator.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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final_check_status final_check_eh() override { return m_used?FC_GIVEUP:FC_DONE; }
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bool internalize_atom(app*, bool) override { if (!m_used) { get_context().push_trail(value_trail<bool>(m_used)); m_used = true; } return false; }
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bool internalize_term(app*) override { return internalize_atom(nullptr,false); }
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void new_eq_eh(theory_var, theory_var) override { }
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void new_diseq_eh(theory_var, theory_var) override {}
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theory* mk_fresh(context* new_ctx) override { return alloc(theory_seq_empty, *new_ctx); }
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char const * get_name() const override { return "seq-empty"; }
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void display(std::ostream& out) const override {}
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public:
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theory_seq_empty(context& ctx):theory(ctx, ctx.get_manager().mk_family_id("seq")), m_used(false) {}
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void init_model(model_generator & mg) override {
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mg.register_factory(alloc(seq_factory, get_manager(), get_family_id(), mg.get_model()));
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}
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};
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};
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