67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
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/*
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Copyright (c) 2015 Microsoft Corporation. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Author: Leonardo de Moura
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*/
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#pragma once
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#include "util/rc.h"
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#include "util/rb_tree.h"
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#include "kernel/expr.h"
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namespace lean {
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namespace blast {
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class hypothesis;
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class state;
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class goal;
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class justification_cell {
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MK_LEAN_RC();
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unsigned m_idx;
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void dealloc();
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public:
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justification_cell();
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virtual ~justification_cell() {}
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virtual expr to_expr(hypothesis const &) const = 0;
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/** \brief Return thread local unique identifier associated with justification object */
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unsigned get_idx() const { return m_idx; }
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};
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class justification {
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justification_cell * m_ptr;
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public:
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justification();
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justification(justification_cell & c);
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justification(justification const & s);
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justification(justification && s);
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~justification();
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justification & operator=(justification const & s);
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justification & operator=(justification && s);
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expr to_expr(hypothesis const & h) const { return m_ptr->to_expr(h); }
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};
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typedef rb_tree<unsigned, unsigned_cmp> hypothesis_set;
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class hypothesis {
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friend class goal;
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bool m_active;
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unsigned m_depth;
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hypothesis_set m_backward_deps;
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hypothesis_set m_forward_deps;
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expr m_type;
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optional<expr> m_value;
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justification m_jst;
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public:
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hypothesis();
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bool is_active() const { return m_active; }
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unsigned get_depth() const { return m_depth; }
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hypothesis_set const & get_backward_deps() const { return m_backward_deps; }
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hypothesis_set const & get_forward_deps() const { return m_forward_deps; }
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expr const & get_type() const { return m_type; }
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optional<expr> const & get_value() const { return m_value; }
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justification const & get_justification() const { return m_jst; }
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};
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}
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}
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