forked from serde-rs/serde
-
Notifications
You must be signed in to change notification settings - Fork 2
/
tuple_struct_path.rs
77 lines (60 loc) · 2.54 KB
/
tuple_struct_path.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
65
66
67
68
69
70
71
72
73
74
75
76
77
use serde_derive::Deserialize;
fn d<T>() -> T {
unimplemented!()
}
/// No errors expected:
/// - if both fields are provided, both gets value from data
/// - if only one field is provided, the second gets default value
#[derive(Deserialize)]
struct T1(u8, #[serde(default = "d")] u8);
/// Errors expected -- the first field can get default value only if sequence is
/// empty, but that mean that all other fields cannot be deserialized without
/// errors, so the `#[serde(default)]` attribute is superfluous
#[derive(Deserialize)]
struct T2(#[serde(default = "d")] u8, u8, u8);
/// No errors expected:
/// - if both fields are provided, both gets value from data
/// - if only one field is provided, the second gets default value
/// - if none fields are provided, both gets default value
#[derive(Deserialize)]
struct T3(#[serde(default = "d")] u8, #[serde(default = "d")] u8);
////////////////////////////////////////////////////////////////////////////////
/// No errors expected -- missing fields gets default values
#[derive(Deserialize, Default)]
#[serde(default)]
struct T1D(#[serde(default = "d")] u8, u8);
/// No errors expected -- missing fields gets default values
#[derive(Deserialize, Default)]
#[serde(default)]
struct T2D(u8, #[serde(default = "d")] u8);
/// No errors expected -- missing fields gets default values
#[derive(Deserialize, Default)]
#[serde(default)]
struct T3D(#[serde(default = "d")] u8, #[serde(default = "d")] u8);
////////////////////////////////////////////////////////////////////////////////
/// No errors expected -- missing fields gets default values
#[derive(Deserialize)]
#[serde(default = "d")]
struct T1Path(#[serde(default)] u8, u8);
/// No errors expected -- missing fields gets default values
#[derive(Deserialize)]
#[serde(default = "d")]
struct T2Path(u8, #[serde(default)] u8);
/// No errors expected -- missing fields gets default values
#[derive(Deserialize)]
#[serde(default = "d")]
struct T3Path(#[serde(default)] u8, #[serde(default)] u8);
////////////////////////////////////////////////////////////////////////////////
/// No errors expected -- missing fields gets default values
#[derive(Deserialize)]
#[serde(default = "d")]
struct T1PathD(#[serde(default = "d")] u8, u8);
/// No errors expected -- missing fields gets default values
#[derive(Deserialize)]
#[serde(default = "d")]
struct T2PathD(u8, #[serde(default = "d")] u8);
/// No errors expected -- missing fields gets default values
#[derive(Deserialize)]
#[serde(default = "d")]
struct T3PathD(#[serde(default = "d")] u8, #[serde(default = "d")] u8);
fn main() {}