51 lines
2.6 KiB
C++
51 lines
2.6 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 "kernel/environment.h"
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namespace lean {
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struct relation_info {
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unsigned m_arity;
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unsigned m_lhs_pos;
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unsigned m_rhs_pos;
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public:
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relation_info() {}
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relation_info(unsigned arity, unsigned lhs, unsigned rhs):
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m_arity(arity), m_lhs_pos(lhs), m_rhs_pos(rhs) {
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lean_assert(m_lhs_pos < m_arity);
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lean_assert(m_rhs_pos < m_arity);
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}
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unsigned get_arity() const { return m_arity; }
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unsigned get_lhs_pos() const { return m_lhs_pos; }
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unsigned get_rhs_pos() const { return m_rhs_pos; }
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};
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/** \brief Return true if \c rop is a registered equivalence relation in the given manager */
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bool is_equivalence(environment const & env, name const & rop);
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/** \brief If \c rop is a registered relation, then return a non-null pointer to the associated information */
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relation_info const * get_relation_info(environment const & env, name const & rop);
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environment add_subst(environment const & env, name const & n, bool persistent = true);
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environment add_refl(environment const & env, name const & n, bool persistent = true);
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environment add_symm(environment const & env, name const & n, bool persistent = true);
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environment add_trans(environment const & env, name const & n, bool persistent = true);
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optional<std::tuple<name, unsigned, unsigned>> get_refl_extra_info(environment const & env, name const & op);
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optional<std::tuple<name, unsigned, unsigned>> get_subst_extra_info(environment const & env, name const & op);
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optional<std::tuple<name, unsigned, unsigned>> get_symm_extra_info(environment const & env, name const & op);
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optional<std::tuple<name, name, unsigned>> get_trans_extra_info(environment const & env, name const & op1, name const & op2);
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optional<name> get_refl_info(environment const & env, name const & op);
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optional<name> get_symm_info(environment const & env, name const & op);
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optional<name> get_trans_info(environment const & env, name const & op);
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bool is_subst_relation(environment const & env, name const & op);
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inline bool is_trans_relation(environment const & env, name const & op) { return static_cast<bool>(get_trans_info(env, op)); }
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inline bool is_symm_relation(environment const & env, name const & op) { return static_cast<bool>(get_symm_info(env, op)); }
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inline bool is_refl_relation(environment const & env, name const & op) { return static_cast<bool>(get_refl_info(env, op)); }
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void initialize_relation_manager();
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void finalize_relation_manager();
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}
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