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 
18 extern crate attribute_macro;
19 use attribute_macro::show_streams;
20 
21 // Example: Basic function
22 #[show_streams]
invoke1()23 fn invoke1() {}
24 // out: attr: ""
25 // out: item: "fn invoke1() { }"
26 
27 // Example: Attribute with input
28 #[show_streams(bar)]
invoke2()29 fn invoke2() {}
30 // out: attr: "bar"
31 // out: item: "fn invoke2() {}"
32 
33 // Example: Multiple tokens in the input
34 #[show_streams(multiple => tokens)]
invoke3()35 fn invoke3() {}
36 // out: attr: "multiple => tokens"
37 // out: item: "fn invoke3() {}"
38 
39 // Example:
40 #[show_streams { delimiters }]
invoke4()41 fn invoke4() {}
42 // out: attr: "delimiters"
43 // out: item: "fn invoke4() {}"
44 
main()45 fn main() {
46     invoke1();
47     invoke2();
48     invoke3();
49     invoke4();
50 }
51