43 lines
1.7 KiB
C++
43 lines
1.7 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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/**
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\brief Replace the free variables in \c e.
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Whenever a new sub-expression is created in the process, the procedure \c new_eh is invoked.
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*/
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expr instantiate(expr const & e, unsigned n, expr const * s, std::function<void(expr const & old_e, expr const & new_e)> const & new_eh);
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/**
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\brief Replace free variable \c 0 with \c s in \c e.
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Whenever a new sub-expression is created in the process, the procedure \c new_eh is invoked.
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*/
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expr instantiate(expr const & e, expr const & s, std::function<void(expr const & old_e, expr const & new_e)> const & new_eh);
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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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expr beta_reduce(expr t);
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/**
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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_params(expr const & e, param_names const & ps, levels const & ls);
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}
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