39 lines
1.1 KiB
C++
39 lines
1.1 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 "util/lua.h"
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#include "kernel/expr.h"
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#include "kernel/expr_maps.h"
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namespace lean {
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class metavar_env;
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/**
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\brief Return a new placeholder expression (with an optional
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type). To be able to track location, a new constant for each
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placeholder.
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*/
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expr mk_placeholder(optional<expr> const & t = none_expr());
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/**
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\brief Return true iff the given expression is a placeholder.
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*/
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bool is_placeholder(expr const & e);
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/**
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\brief Return true iff the given expression contains placeholders.
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*/
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bool has_placeholder(expr const & e);
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/**
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\brief Replace the placeholders in \c e with fresh metavariables from \c menv.
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if \c new2old is not nullptr, then for each new expression \c t created based on
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\c s, we store <tt>(*new2old)[t] = s</tt>.
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*/
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expr replace_placeholders_with_metavars(expr const & e, metavar_env const & menv, expr_map<expr> * new2old = nullptr);
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void open_placeholder(lua_State * L);
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}
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