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

Author: Leonardo de Moura
*/
#include "library/bin_op.h"

namespace lean {
expr mk_bin_rop(expr const & op, expr const & unit, unsigned num_args, expr const * args) {
    if (num_args == 0) {
        return unit;
    } else {
        expr r = args[num_args - 1];
        unsigned i = num_args - 1;
        while (i > 0) {
            --i;
            r = mk_app({op, args[i], r});
        }
        return r;
    }
}
expr mk_bin_rop(expr const & op, expr const & unit, std::initializer_list<expr> const & l) {
    return mk_bin_rop(op, unit, l.size(), l.begin());
}

expr mk_bin_lop(expr const & op, expr const & unit, unsigned num_args, expr const * args) {
    if (num_args == 0) {
        return unit;
    } else {
        expr r = args[0];
        for (unsigned i = 1; i < num_args; i++) {
            r = mk_app({op, r, args[i]});
        }
        return r;
    }
}
expr mk_bin_lop(expr const & op, expr const & unit, std::initializer_list<expr> const & l) {
    return mk_bin_lop(op, unit, l.size(), l.begin());
}
}