/*
Copyright (c) 2013 Microsoft Corporation. All rights reserved.
Released under Apache 2.0 license as described in the file LICENSE.

Author: Leonardo de Moura
*/
#pragma once
#include <memory>
#include <utility>
#include <functional>
#include "util/buffer.h"
#include "kernel/expr.h"
#include "kernel/expr_sets.h"

namespace lean {
/** \brief Expression visitor.

    The argument \c f must be a lambda (function object) containing the method

    <code>
    bool operator()(expr const & e, unsigned offset)
    </code>

    The \c offset is the number of binders under which \c e occurs.
*/
void for_each(expr const & e, std::function<bool(expr const &, unsigned)> && f); // NOLINT
}