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
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
#![recursion_limit = "4096"]
use syn::Type;
use tt_call::{parse_type, tt_call};
macro_rules! assert_type {
($($tokens:tt)*) => {
tt_call! {
macro = [{ parse_type }]
input = [{ $($tokens)* @ }]
~~> assert_type_return! {
expected = [{ $($tokens)* }]
}
}
};
}
macro_rules! assert_type_return {
{
expected = [{ $($expected:tt)* }]
type = [{ $($actual:tt)* }]
rest = [{ @ }]
} => {
check(stringify!($($expected)*), stringify!($($actual)*));
};
}
fn check(expected: &str, actual: &str) {
assert_eq!(
syn::parse_str::<Type>(expected).unwrap(),
syn::parse_str::<Type>(actual).unwrap(),
);
}
#[test]
fn test_parse_type() {
// Paths
assert_type!(u8);
assert_type!(std::collections::HashMap);
assert_type!(::std::collections::HashMap);
// Angle brackets
assert_type!(Vec<u8>);
assert_type!(<u8>::Associated);
assert_type!(<u8 as Trait>::Associated);
assert_type!(<u8 as Trait<T>>::Associated);
assert_type!(<Vec<u8> as Trait>::Associated);
assert_type!(Iterator<Item = u8>);
assert_type!(RefMut<'a, u8>);
// Square brackets
assert_type!([u8]);
assert_type!([u8; 64]);
// Pointers
assert_type!(*const u8);
assert_type!(*mut u8);
// References
assert_type!(&u8);
assert_type!(&mut u8);
assert_type!(&'a u8);
assert_type!(&'a mut u8);
// Functions
assert_type!(fn());
assert_type!(fn(u8));
assert_type!(fn(u8));
assert_type!(fn(u8, u8));
assert_type!(fn(a: u8, b: u8));
assert_type!(fn() -> u8);
// Tuples
assert_type!(());
assert_type!((u8));
assert_type!((u8,));
assert_type!((u8, u8));
// Traits
assert_type!(dyn Display);
assert_type!(dyn Display + Send);
assert_type!(impl Display);
assert_type!(impl Display + Send);
assert_type!(impl Fn() -> Box<Display + Send> + 'static);
// Type macros
assert_type!(m!());
assert_type!(m![]);
assert_type!(m! {});
assert_type!(::m!());
assert_type!(::m!(u8));
assert_type!(crate::m!(u8));
// Special punctuation
assert_type!(!);
assert_type!(_);
}
#[test]
fn test_futures() {
assert_type!(
futures::MapErr<
futures::Map<
futures::sink::SendAll<
futures::stream::SplitSink<
futures::stream::AndThen<
tokio_core::io::Framed<
Client,
ipc::LenDelimited<protobuf::Message::Message>,
>,
fn(
tokio_core::io::EasyBuf,
)
-> std::result::Result<protobuf::Message::Message, std::io::Error>,
std::result::Result<protobuf::Message::Message, std::io::Error>,
>,
>,
futures::stream::Map<
futures::stream::SplitStream<
futures::stream::AndThen<
tokio_core::io::Framed<
Client,
ipc::LenDelimited<protobuf::Message::Message>,
>,
fn(
tokio_core::io::EasyBuf,
) -> std::result::Result<
protobuf::Message::Message,
std::io::Error,
>,
std::result::Result<protobuf::Message::Message, std::io::Error>,
>,
>,
H,
>,
>,
fn(
(
futures::stream::SplitSink<
futures::stream::AndThen<
tokio_core::io::Framed<
Client,
ipc::LenDelimited<protobuf::Message::Message>,
>,
fn(
tokio_core::io::EasyBuf,
) -> std::result::Result<
protobuf::Message::Message,
std::io::Error,
>,
std::result::Result<protobuf::Message::Message, std::io::Error>,
>,
>,
futures::stream::Map<
futures::stream::SplitStream<
futures::stream::AndThen<
tokio_core::io::Framed<
Client,
ipc::LenDelimited<protobuf::Message::Message>,
>,
fn(
tokio_core::io::EasyBuf,
) -> std::result::Result<
protobuf::Message::Message,
std::io::Error,
>,
std::result::Result<protobuf::Message::Message, std::io::Error>,
>,
>,
H,
>
),
),
>,
EH,
>
);
}