-
Notifications
You must be signed in to change notification settings - Fork 32
/
macro-fail.rs
64 lines (50 loc) · 1.51 KB
/
macro-fail.rs
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
54
55
56
57
58
59
60
61
62
63
64
struct Example<const N: usize>;
macro_rules! external_macro {
() => {{
//~^ ERROR expected type
const X: usize = 1337;
X
}}
}
trait Marker<const N: usize> {}
impl<const N: usize> Marker<N> for Example<N> {}
fn make_marker() -> impl Marker<gimme_a_const!(marker)> {
//~^ ERROR: type provided when a constant was expected
//~| ERROR: type provided when a constant was expected
Example::<gimme_a_const!(marker)>
//~^ ERROR: type provided when a constant was expected
}
fn from_marker(_: impl Marker<{
#[macro_export]
macro_rules! inline { () => {{ 3 }} }; inline!()
}>) {}
fn main() {
let _ok = Example::<{
#[macro_export]
macro_rules! gimme_a_const {
($rusty: ident) => {{ let $rusty = 3; *&$rusty }}
//~^ ERROR expected type
//~| ERROR expected type
};
gimme_a_const!(run)
}>;
let _fail = Example::<external_macro!()>;
//~^ ERROR: type provided when a constant was expected
let _fail = Example::<gimme_a_const!()>;
//~^ ERROR unexpected end of macro invocation
//~| ERROR: type provided when a constant was expected
}
// ferrocene-annotations: fls_xa7lp0zg1ol2
// Declarative macros
// ferrocene-annotations: fls_wjldgtio5o75
// Macro expansion
// ferrocene-annotations: fls_vnvt40pa48n8
// Macro invocation
// ferrocene-annotations: fls_4apk1exafxii
// Macro matching
// ferrocene-annotations: fls_ym00b6ewf4n3
// Macro transcription
// ferrocene-annotations: fls_n3ktmjqf87qb
// Rule matching
// ferrocene-annotations: fls_qpx6lgapce57
// Token matching