object-rainbow-apply 0.0.0-a.2

asynchronous map trait for object-rainbow-history
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
142

use core::future::ready;

use futures_util::future::try_join;
use object_rainbow::{
    InlineOutput, ListHashes, MaybeHasNiche, Parse, ParseInline, Size, Tagged, ToOutput,
    Topological, derive_for_wrapped,
    map_extra::{SmExtra, StaticMap},
    tuple_extra::ToTuple2,
};

#[cfg(feature = "amt")]
mod amt;
pub mod enforce_unique;
#[cfg(feature = "hamt")]
mod hamt;
#[cfg(feature = "point")]
pub mod point;
pub mod remap;
pub mod skip;
#[cfg(feature = "trie")]
mod trie;
#[cfg(feature = "unique-diffs")]
pub mod unique_diffs;

#[derive_for_wrapped]
pub trait Apply<Diff: Send>: Send {
    type Output: Send;
    /// Must stay isomorphic under [`Equivalent`] conversions.
    fn apply(
        &mut self,
        diff: Diff,
    ) -> impl Send + Future<Output = object_rainbow::Result<Self::Output>>;
}

impl Apply<()> for () {
    type Output = ();

    fn apply(
        &mut self,
        (): (),
    ) -> impl Send + Future<Output = object_rainbow::Result<Self::Output>> {
        ready(Ok(()))
    }
}

impl<A: Apply<DiffA>, B: Apply<DiffB>, DiffA: Send, DiffB: Send> Apply<(DiffA, DiffB)> for (A, B) {
    type Output = (A::Output, B::Output);

    fn apply(
        &mut self,
        (a, b): (DiffA, DiffB),
    ) -> impl Send + Future<Output = object_rainbow::Result<Self::Output>> {
        try_join(self.0.apply(a), self.1.apply(b))
    }
}

impl<M: Send + StaticMap<D, Mapped: Send>, D: Send> Apply<D> for SmExtra<M> {
    type Output = M::Mapped;

    fn apply(&mut self, d: D) -> impl Send + Future<Output = object_rainbow::Result<Self::Output>> {
        core::future::ready(Ok(M::static_map(d)))
    }
}

#[derive(
    Debug,
    ToOutput,
    InlineOutput,
    Tagged,
    ListHashes,
    Topological,
    Parse,
    ParseInline,
    Size,
    MaybeHasNiche,
    Clone,
    Copy,
    PartialEq,
    Eq,
    Default,
)]
pub struct Sequential<First, Second> {
    first: First,
    second: Second,
}

impl<First, Second> Sequential<First, Second> {
    pub fn first(&self) -> &First {
        &self.first
    }

    pub fn second(&self) -> &Second {
        &self.second
    }
}

impl<Diff: Send, First: Apply<Diff>, Second: Apply<First::Output>> Apply<Diff>
    for Sequential<First, Second>
{
    type Output = Second::Output;

    async fn apply(&mut self, diff: Diff) -> object_rainbow::Result<Self::Output> {
        self.second.apply(self.first.apply(diff).await?).await
    }
}

pub type Parallel<A, B> = Sequential<ToTuple2, (A, B)>;

#[derive(
    Debug,
    ToOutput,
    InlineOutput,
    Tagged,
    ListHashes,
    Topological,
    Parse,
    ParseInline,
    Size,
    MaybeHasNiche,
    Clone,
    Copy,
    PartialEq,
    Eq,
    PartialOrd,
    Ord,
    Default,
)]
pub struct FromIter<T>(pub T);

impl<T: Apply<D>, D: Send, I: Send + IntoIterator<Item = D, IntoIter: Send>> Apply<I>
    for FromIter<T>
{
    type Output = Vec<T::Output>;

    async fn apply(&mut self, diff: I) -> object_rainbow::Result<Self::Output> {
        let mut output = Vec::new();
        for diff in diff {
            output.push(self.0.apply(diff).await?);
        }
        Ok(output)
    }
}