File: generate-mod.rs

package info (click to toggle)
rustc-mozilla 1.51.0%2Bdfsg1-1~deb10u2
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 1,267,560 kB
  • sloc: xml: 147,950; sh: 17,592; ansic: 16,886; javascript: 7,153; python: 6,231; cpp: 4,693; makefile: 3,453; asm: 1,437; ruby: 68; awk: 12
file content (49 lines) | stat: -rw-r--r-- 1,330 bytes parent folder | download | duplicates (16)
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
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
// This is an equivalent of issue #50504, but for declarative macros.

#![feature(decl_macro, rustc_attrs)]

macro genmod($FromOutside: ident, $Outer: ident) {
    type A = $FromOutside;
    struct $Outer;
    mod inner {
        type A = $FromOutside; // `FromOutside` shouldn't be available from here
        type Inner = $Outer; // `Outer` shouldn't be available from here
    }
}

#[rustc_macro_transparency = "transparent"]
macro genmod_transparent() {
    type A = FromOutside;
    struct Outer;
    mod inner {
        type A = FromOutside; //~ ERROR cannot find type `FromOutside` in this scope
        type Inner = Outer; //~ ERROR cannot find type `Outer` in this scope
    }
}

macro_rules! genmod_legacy { () => {
    type A = FromOutside;
    struct Outer;
    mod inner {
        type A = FromOutside; //~ ERROR cannot find type `FromOutside` in this scope
        type Inner = Outer; //~ ERROR cannot find type `Outer` in this scope
    }
}}

fn check() {
    struct FromOutside;
    genmod!(FromOutside, Outer); //~ ERROR cannot find type `FromOutside` in this scope
                                 //~| ERROR cannot find type `Outer` in this scope
}

fn check_transparent() {
    struct FromOutside;
    genmod_transparent!();
}

fn check_legacy() {
    struct FromOutside;
    genmod_legacy!();
}

fn main() {}