File: attr-args.rs

package info (click to toggle)
rustc-web 1.70.0%2Bdfsg1-7~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,517,036 kB
  • sloc: xml: 147,962; javascript: 10,210; sh: 8,590; python: 8,220; ansic: 5,901; cpp: 4,635; makefile: 4,006; asm: 2,856
file content (28 lines) | stat: -rw-r--r-- 587 bytes parent folder | download | duplicates (6)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
// force-host
// no-prefer-dynamic

#![crate_type = "proc-macro"]

extern crate proc_macro;

use proc_macro::TokenStream;

#[proc_macro_attribute]
pub fn attr_with_args(args: TokenStream, input: TokenStream) -> TokenStream {
    let args = args.to_string();

    assert_eq!(args, r#"text = "Hello, world!""#);

    let input = input.to_string();

    assert_eq!(input, "fn foo() {}");

    r#"
        fn foo() -> &'static str { "Hello, world!" }
    "#.parse().unwrap()
}

#[proc_macro_attribute]
pub fn identity(attr_args: TokenStream, _: TokenStream) -> TokenStream {
    attr_args
}