fieldx 0.2.3

Procedural macro for constructing structs with lazily initialized fields, builder pattern, and serde support with a focus on declarative syntax.
Documentation 
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

use fieldx::fxstruct;

#[fxstruct(builder)]
#[derive(Debug)]
struct FooPlain {
    #[fieldx(optional, get, builder(required, attributes_fn(allow(dead_code))))]
    #[allow(dead_code)]
    v: i32,
}

#[cfg(feature = "sync")]
#[fxstruct(sync, builder)]
#[derive(Debug)]
struct FooSync {
    #[fieldx(optional, get, builder(required, attributes_fn(allow(dead_code))))]
    #[allow(dead_code)]
    v: i32,
}

#[test]
fn plain() {
    let foo = FooPlain::builder().build();
    if let Err(e) = foo {
        assert!(
            matches!(e, fieldx::error::FieldXError::UninitializedField(f) if f == "v"),
            "error is expected"
        )
    }
    else {
        panic!("error is expected");
    }
}

#[cfg(feature = "sync")]
#[test]
fn sync() {
    let foo = FooSync::builder().build();
    if let Err(e) = foo {
        assert!(
            matches!(e, fieldx::error::FieldXError::UninitializedField(f) if f == "v"),
            "error is expected"
        )
    }
    else {
        panic!("error is expected");
    }
}