build-deftly 0.1.0

Derive custom builders, using the derive-deftly macro system
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
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

use assert_matches::assert_matches;
use build_deftly::prelude::*;
use derive_deftly::Deftly;

#[test]
fn skip_setters_outer() {
    #[derive(Deftly, Debug)]
    #[derive_deftly(Builder)]
    #[deftly(builder(setter(skip)))]
    struct Small {
        hello: String,
        world: u32,
    }

    let small = Small::builder().build().unwrap();
    assert_eq!(&small.hello, "");
    assert_eq!(small.world, 0);
}

#[test]
fn skip_setters_inner() {
    #[derive(Deftly, Debug)]
    #[derive_deftly(Builder)]
    struct Small {
        hello: String,
        #[deftly(builder(setter(skip)))]
        world: u32,
    }

    let small = Small::builder().hello("hi".to_string()).build().unwrap();
    assert_eq!(&small.hello, "hi");
    assert_eq!(small.world, 0);

    assert_matches!(
        Small::builder().build(),
        Err(SmallBuilderError::UninitializedField(_))
    );
}

#[test]
fn skip_setters_dflt() {
    #[derive(Deftly, Debug)]
    #[derive_deftly(Builder)]
    #[deftly(builder(setter(skip)))]
    struct Small {
        #[deftly(builder(setter(enabled)))]
        hello: String,
        world: u32,
    }

    let small = Small::builder().hello("hi".to_string()).build().unwrap();
    assert_eq!(&small.hello, "hi");
    assert_eq!(small.world, 0);

    assert_matches!(
        Small::builder().build(),
        Err(SmallBuilderError::UninitializedField(_))
    );
}

#[test]
fn custom_setters_outer() {
    #[derive(Deftly, Debug)]
    #[derive_deftly(Builder)]
    #[deftly(builder(setter(custom)))]
    struct Small {
        hello: String,
        world: u32,
    }
    impl SmallBuilder {
        fn set_hello(&mut self, s: &str) -> &mut Self {
            self.hello = Some(s.to_string());
            self
        }
        fn make_world_square_of(&mut self, n: u32) -> &mut Self {
            self.world = Some(n * n);
            self
        }
    }

    let small = Small::builder()
        .set_hello("hi")
        .make_world_square_of(11)
        .build()
        .unwrap();
    assert_eq!(&small.hello, "hi");
    assert_eq!(small.world, 121);
}

#[test]
fn custom_setters_inner() {
    #[derive(Deftly, Debug)]
    #[derive_deftly(Builder)]
    struct Small {
        #[deftly(builder(setter(custom)))]
        hello: String,
        #[deftly(builder(setter(custom)))]
        world: u32,
    }
    impl SmallBuilder {
        fn set_hello(&mut self, s: &str) -> &mut Self {
            self.hello = Some(s.to_string());
            self
        }
        fn make_world_square_of(&mut self, n: u32) -> &mut Self {
            self.world = Some(n * n);
            self
        }
    }

    let small = Small::builder()
        .set_hello("hi")
        .make_world_square_of(11)
        .build()
        .unwrap();
    assert_eq!(&small.hello, "hi");
    assert_eq!(small.world, 121);
}

#[test]
fn skip_build() {
    #[derive(Deftly, Debug)]
    #[derive_deftly(Builder)]
    #[deftly(builder(build_fn(skip)))]
    struct Small {
        hello: String,
        world: u32,
    }
    impl SmallBuilder {
        fn build(&self) -> Small {
            Small {
                hello: "ignored".into(),
                world: 42,
            }
        }
    }

    let small = Small::builder().hello("abc".to_string()).world(99).build();
    assert_eq!(&small.hello, "ignored");
    assert_eq!(small.world, 42);
}