1 /*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 //! attribute_macro example for rust
17 extern crate proc_macro;
18 use proc_macro::TokenStream;
19
20 /// function show_streams
21 #[proc_macro_attribute]
show_streamsnull22 pub fn show_streams(attr: TokenStream, item: TokenStream) -> TokenStream {
23 println!("attr: \"{}\"", attr);
24 println!("item: \"{}\"", item);
25 item
26 }
27