named-tup 0.3.1

Create named tuples using the tup!() macro.
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

use crate::tup_struct::{TupDefault, Unused, Used};

/// Defines how two Tup's arguments can be added together
pub trait CanCombine<P1, P2> {
    type Output;
    type PhantomOutput;
    fn combine(self) -> Self::Output;
}

impl<T> CanCombine<Used, Used> for (T, T) {
    type Output = T;
    type PhantomOutput = Used;
    fn combine(self) -> T {
        self.1
    }
}

impl<T> CanCombine<Used, Unused> for (T, ()) {
    type Output = T;
    type PhantomOutput = Used;
    fn combine(self) -> T {
        self.0
    }
}

impl<T> CanCombine<Unused, Used> for ((), T) {
    type Output = T;
    type PhantomOutput = Used;
    fn combine(self) -> T {
        self.1
    }
}

impl CanCombine<Unused, Unused> for ((), ()) {
    type Output = ();
    type PhantomOutput = Unused;
    fn combine(self) {}
}

impl<T, D: TupDefault> CanCombine<Used, D> for (T, T) {
    type Output = T;
    type PhantomOutput = Used;
    fn combine(self) -> T {
        self.0
    }
}

impl<T, D1: TupDefault, D2: TupDefault> CanCombine<D1, D2> for (T, T) {
    type Output = T;
    type PhantomOutput = D2;
    fn combine(self) -> T {
        self.1
    }
}

impl<T, D: TupDefault> CanCombine<D, Used> for (T, T) {
    type Output = T;
    type PhantomOutput = Used;
    fn combine(self) -> T {
        self.1
    }
}

impl<T, D: TupDefault> CanCombine<Unused, D> for ((), T) {
    type Output = T;
    type PhantomOutput = D;
    fn combine(self) -> T {
        self.1
    }
}

impl<T, D: TupDefault> CanCombine<D, Unused> for (T, ()) {
    type Output = T;
    type PhantomOutput = D;
    fn combine(self) -> T {
        self.0
    }
}