27 lines
923 B
C++
27 lines
923 B
C++
/*
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Copyright (c) 2013-2014 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 <tuple>
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#include "util/buffer.h"
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#include "util/interrupt.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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/**
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\brief Apply <tt>f</tt> to the subexpressions of a given expression.
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f is invoked for each subexpression \c s of the input expression e.
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In a call <tt>f(s, n)</tt>, n is the scope level, i.e., the number of
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bindings operators that enclosing \c s. The replaces only visits children of \c e
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if f return none_expr.
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*/
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expr replace(expr const & e, std::function<optional<expr>(expr const &, unsigned)> const & f);
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inline expr replace(expr const & e, std::function<optional<expr>(expr const &)> const & f) {
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return replace(e, [&](expr const & e, unsigned) { return f(e); });
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}
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}
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