File: disappearing-resolution.rs

package info (click to toggle)
rustc 1.86.0%2Bdfsg1-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, forky, sid
  • size: 913,560 kB
  • sloc: xml: 158,127; python: 35,921; javascript: 19,689; sh: 19,600; cpp: 18,906; ansic: 13,124; asm: 4,376; makefile: 708; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (22 lines) | stat: -rw-r--r-- 768 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
// Regression test for issue #64803 (initial attribute resolution can disappear later).

//@ proc-macro: test-macros.rs

#[macro_use]
extern crate test_macros;

mod m {
    use test_macros::Empty;
}
use m::Empty; //~ ERROR derive macro import `Empty` is private

// To resolve `empty_helper` we need to resolve `Empty`.
// During initial resolution `use m::Empty` introduces no entries, so we proceed to `macro_use`,
// successfully resolve `Empty` from there, and then resolve `empty_helper` as its helper.
// During validation `use m::Empty` introduces a `Res::Err` stub, so `Empty` resolves to it,
// and `empty_helper` can no longer be resolved.
#[empty_helper] //~ ERROR cannot find attribute `empty_helper` in this scope
#[derive(Empty)]
struct S;

fn main() {}