50 lines
2.1 KiB
C++
50 lines
2.1 KiB
C++
/*
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Copyright (c) 2013 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 <functional>
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#include "kernel/expr.h"
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namespace lean {
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class ro_metavar_env;
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/** \brief Replace the free variables with indices 0, ..., n-1 with s[0], ..., s[n-1] in e. */
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expr instantiate(expr const & e, unsigned n, expr const * s);
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expr instantiate(expr const & e, std::initializer_list<expr> const & l);
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/** \brief Replace free variable \c i with \c s in \c e. */
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expr instantiate(expr const & e, unsigned i, expr const & s);
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/** \brief Replace free variable \c 0 with \c s in \c e. */
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expr instantiate(expr const & e, expr const & s);
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/** \brief Replace the free variables with indices 0, ..., n-1 with s[n-1], ..., s[0] in e. */
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expr instantiate_rev(expr const & e, unsigned n, expr const * s);
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inline expr instantiate_rev(expr const & e, buffer<expr> const & s) {
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return instantiate_rev(e, s.size(), s.data());
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}
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expr apply_beta(expr f, unsigned num_args, expr const * args);
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bool is_head_beta(expr const & t);
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expr head_beta_reduce(expr const & t);
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/** \brief Instantiate the universe level parameters \c ps occurring in \c e with the levels \c ls.
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\pre length(ps) == length(ls)
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*/
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expr instantiate_univ_params(expr const & e, level_param_names const & ps, levels const & ls);
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class declaration;
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/** \brief Instantiate the universe level parameters of the type of the given declaration.
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\pre d.get_num_univ_params() == length(ls)
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*/
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expr instantiate_type_univ_params(declaration const & d, levels const & ls);
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/** \brief Instantiate the universe level parameters of the value of the given declaration.
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\pre d.get_num_univ_params() == length(ls)
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*/
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expr instantiate_value_univ_params(declaration const & d, levels const & ls);
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/** \brief Clear thread local caches used by instantiate_value_univ_params and instantiate_type_univ_params.
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We clear the caches whenever we enable expression caching (aka max sharing).
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We do that because the cache may still contain expressions that are not maximally shared. */
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void clear_instantiate_cache();
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}
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