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
50
51
52
53
|
// Macros with def-site hygiene still bring traits into scope.
// It is not clear whether this is desirable behavior or not.
// It is also not clear how to prevent it if it is not desirable.
//@ check-pass
#![feature(decl_macro)]
#![feature(trait_alias)]
mod traits {
pub trait Trait1 {
fn simple_import(&self) {}
}
pub trait Trait2 {
fn renamed_import(&self) {}
}
pub trait Trait3 {
fn underscore_import(&self) {}
}
pub trait Trait4 {
fn trait_alias(&self) {}
}
impl Trait1 for () {}
impl Trait2 for () {}
impl Trait3 for () {}
impl Trait4 for () {}
}
macro m1() {
use traits::Trait1;
}
macro m2() {
use traits::Trait2 as Alias;
}
macro m3() {
use traits::Trait3 as _;
}
macro m4() {
trait Alias = traits::Trait4;
}
fn main() {
m1!();
m2!();
m3!();
m4!();
().simple_import();
().renamed_import();
().underscore_import();
().trait_alias();
}
|
