/*
 * Copyright (c) 2023 Huawei Device Co., Ltd.
 * 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.
 */

//! test_proc_macro_cargo_crate
extern crate proc_macro;
use proc_macro::TokenStream;

/// calculate_using_proc_macro
#[proc_macro]
pub fn calculate_using_proc_macro(_item: TokenStream) -> TokenStream {
    "(15 + 15)".parse().unwrap()
}