45 lines
1.7 KiB
C++
45 lines
1.7 KiB
C++
/*
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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_map.h"
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#include "library/blast/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 branch;
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class state;
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typedef rb_tree<unsigned, unsigned_cmp> hypothesis_idx_set;
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typedef list<unsigned> hypothesis_idx_list;
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typedef buffer<unsigned> hypothesis_idx_buffer;
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template<typename T>
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using hypothesis_idx_map = typename lean::rb_map<unsigned, T, unsigned_cmp>;
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class hypothesis {
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friend class branch;
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name m_name; // for pretty printing
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unsigned m_active:1;
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unsigned m_depth;
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hypothesis_idx_set m_deps; // hypotheses used by the type and/or value of this hypothesis.
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expr m_type;
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expr m_value; // justification for this object.
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// Remark: if blast::is_local(m_value) is true, then the hypothesis is an assumption
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public:
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hypothesis():m_active(false), m_depth(0) {}
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name const & get_name() const { return m_name; }
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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_idx_set const & get_backward_deps() const { return m_deps; }
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expr const & get_type() const { return m_type; }
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expr const & get_value() const { return m_value; }
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/** \brief Return true iff this hypothesis depends on \c h. */
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bool depends_on(expr const & h) const { return m_deps.contains(href_index(h)); }
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bool is_assumption() const { return blast::is_local(m_value); }
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};
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}}
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