noir-compute 0.2.0

Network of Operators In Rust
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

use super::super::*;
use crate::operator::{Data, DataKey, Operator};
use crate::stream::{KeyedStream, WindowedStream};

#[derive(Clone)]
pub(crate) struct First<T>(Option<T>);

impl<T: Data> WindowAccumulator for First<T> {
    type In = T;
    type Out = T;

    #[inline]
    fn process(&mut self, el: Self::In) {
        if self.0.is_none() {
            self.0 = Some(el);
        }
    }

    #[inline]
    fn output(self) -> Self::Out {
        self.0
            .expect("First::output() called before any element was processed")
    }
}

#[derive(Clone)]
pub(crate) struct Last<T>(Option<T>);

impl<T: Data> WindowAccumulator for Last<T> {
    type In = T;
    type Out = T;

    #[inline]
    fn process(&mut self, el: Self::In) {
        self.0 = Some(el);
    }

    #[inline]
    fn output(self) -> Self::Out {
        self.0
            .expect("First::output() called before any element was processed")
    }
}

impl<Key, Out, WindowDescr, OperatorChain> WindowedStream<OperatorChain, Out, WindowDescr>
where
    WindowDescr: WindowDescription<Out>,
    OperatorChain: Operator<Out = (Key, Out)> + 'static,
    Key: DataKey,
    Out: Data,
{
    pub fn first(self) -> KeyedStream<impl Operator<Out = (Key, Out)>> {
        let acc = First(None);
        self.add_window_operator("WindowFirst", acc)
    }
}

impl<Key, Out, WindowDescr, OperatorChain> WindowedStream<OperatorChain, Out, WindowDescr>
where
    WindowDescr: WindowDescription<Out>,
    OperatorChain: Operator<Out = (Key, Out)> + 'static,
    Key: DataKey,
    Out: Data,
{
    pub fn last(self) -> KeyedStream<impl Operator<Out = (Key, Out)>> {
        let acc = Last(None);
        self.add_window_operator("WindowLast", acc)
    }
}