File: expand-to-derive.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 (34 lines) | stat: -rw-r--r-- 673 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
29
30
31
32
33
34
// check-pass
// compile-flags: -Z span-debug --error-format human
// aux-build:test-macros.rs

#![feature(rustc_attrs)]

#![no_std] // Don't load unnecessary hygiene information from std
extern crate std;

#[macro_use]
extern crate test_macros;

macro_rules! expand_to_derive {
    ($item:item) => {
        #[derive(Print)]
        struct Foo {
            #[cfg(FALSE)] removed: bool,
            field: [bool; {
                $item
                0
            }]
        }
    };
}

expand_to_derive! {
    #[cfg_attr(not(FALSE), rustc_dummy)]
    struct Inner {
        #[cfg(FALSE)] removed_inner_field: bool,
        other_inner_field: u8,
    }
}

fn main() {}