49 lines
1.9 KiB
C++
49 lines
1.9 KiB
C++
/*
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Copyright (c) 2014 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 <utility>
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#include "util/lua.h"
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#include "kernel/environment.h"
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namespace lean {
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/** \brief Add the alias \c a for expression \c e. \c e must not have free variables. */
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environment add_alias(environment const & env, name const & a, expr const & e);
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/** \brief If \c t is aliased in \c env, then return its name. Otherwise, return none. */
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optional<name> is_aliased(environment const & env, expr const & t);
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/** \brief Return expressions associated with the given alias. */
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list<expr> get_alias_exprs(environment const & env, name const & n);
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/**
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\brief Add the alias \c a for the level expression \c l. An error is generated if the new alias shadows
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existing aliases and/or declarations. We don't have "choice" construct for universe
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levels.
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*/
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environment add_alias(environment const & env, name const & a, level const & l);
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/** \brief If \c l is aliased in \c env, then return its name. Otherwise, return none. */
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optional<name> is_aliased(environment const & env, level const & l);
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/** \brief Return the level associated with the given alias. */
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optional<level> get_alias_level(environment const & env, name const & n);
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/**
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\brief Create an alias for each declaration named <tt>prefix.rest</tt>.
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The alias for <tt>prefix.rest</tt> is <tt>new_prefix.rest</tt>.
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The command will also create aliases for universe level declarations.
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However, an error is thrown if the universe level shadows existing aliases and/or declarations.
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We don't have "choice" construct for universe levels.
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\remark \c new_prefix may be the anonymous name.
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*/
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environment add_aliases(environment const & env, name const & prefix, name const & new_prefix,
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unsigned num_exceptions = 0, name const * exceptions = nullptr);
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void open_aliases(lua_State * L);
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}
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