// Copyright 2024 Duskphantom Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// SPDX-License-Identifier: Apache-2.0

#[macro_export]
macro_rules! gen_lrec_binary {
    ($fn_name:ident, $op_name:ident, $base:ident) => {
        pub fn $fn_name(input: &mut &str) -> PResult<Expr> {
            let head = $base.parse_next(input)?;
            let tail: Vec<(BinaryOp, Expr)> = repeat(0.., ($op_name, $base)).parse_next(input)?;
            Ok(if (tail.is_empty()) {
                head
            } else {
                Expr::Binary(Box::new(head), tail)
            })
        }
    };
}
