File: gen-macro-rules-hygiene.rs

package info (click to toggle)
rustc-web 1.78.0%2Bdfsg1-2~deb11u3
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,245,360 kB
  • sloc: xml: 147,985; javascript: 18,022; sh: 11,083; python: 10,265; ansic: 6,172; cpp: 5,023; asm: 4,390; makefile: 4,269
file content (23 lines) | stat: -rw-r--r-- 679 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
// `macro_rules` items produced by transparent macros have correct hygiene in basic cases.
// Local variables and labels are hygienic, items are not hygienic.
// `$crate` refers to the crate that defines `macro_rules` and not the outer transparent macro.

//@ aux-build:gen-macro-rules-hygiene.rs

#[macro_use]
extern crate gen_macro_rules_hygiene;

struct ItemUse;

gen_macro_rules!();
//~^ ERROR use of undeclared label `'label_use`
//~| ERROR cannot find value `local_use` in this scope

fn main() {
    'label_use: loop {
        let local_use = 1;
        generated!();
        ItemDef; // OK
        local_def; //~ ERROR cannot find value `local_def` in this scope
    }
}