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
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
use proc_macro2::*;
macro_rules! assert_impl {
($ty:ident is $($marker:ident) and +) => {
#[test]
#[allow(non_snake_case)]
fn $ty() {
fn assert_implemented<T: $($marker +)+>() {}
assert_implemented::<$ty>();
}
};
($ty:ident is not $($marker:ident) or +) => {
#[test]
#[allow(non_snake_case)]
fn $ty() {
$(
{
// Implemented for types that implement $marker.
trait IsNotImplemented {
fn assert_not_implemented() {}
}
impl<T: $marker> IsNotImplemented for T {}
// Implemented for the type being tested.
trait IsImplemented {
fn assert_not_implemented() {}
}
impl IsImplemented for $ty {}
// If $ty does not implement $marker, there is no ambiguity
// in the following trait method call.
<$ty>::assert_not_implemented();
}
)+
}
};
}
assert_impl!(Delimiter is Send and Sync);
assert_impl!(Spacing is Send and Sync);
assert_impl!(Group is not Send or Sync);
assert_impl!(Ident is not Send or Sync);
assert_impl!(LexError is not Send or Sync);
assert_impl!(Literal is not Send or Sync);
assert_impl!(Punct is not Send or Sync);
assert_impl!(Span is not Send or Sync);
assert_impl!(TokenStream is not Send or Sync);
assert_impl!(TokenTree is not Send or Sync);
#[cfg(procmacro2_semver_exempt)]
mod semver_exempt {
use super::*;
assert_impl!(LineColumn is Send and Sync);
assert_impl!(SourceFile is not Send or Sync);
}
#[cfg(not(no_libprocmacro_unwind_safe))]
mod unwind_safe {
use super::*;
use std::panic::{RefUnwindSafe, UnwindSafe};
macro_rules! assert_unwind_safe {
($($types:ident)*) => {
$(
assert_impl!($types is UnwindSafe and RefUnwindSafe);
)*
};
}
assert_unwind_safe! {
Delimiter
Group
Ident
LexError
Literal
Punct
Spacing
Span
TokenStream
TokenTree
}
#[cfg(procmacro2_semver_exempt)]
assert_unwind_safe! {
LineColumn
SourceFile
}
}
|
