std-mel 0.10.1

Mélodium standard library
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

use melodium_core::*;
use melodium_macro::{check, mel_function, mel_treatment};

pub mod block;

/// Return `true` if `vector` contains a value equal to `value`.
#[mel_function(
    generic T (PartialEquality)
)]
pub fn contains(vector: Vec<T>, value: T) -> bool {
    vector.iter().any(|val| val.partial_equality_eq(&value))
}

/// Pair-wise membership check over two streams.
///
/// For each (`value`, `vec`) pair received from the two streams, emit `true` through `contains` if `vec` contains `value`.
#[mel_treatment(
    generic T (PartialEquality)
    input value Stream<T>
    input vec Stream<Vec<T>>
    output contains Stream<bool>
)]
pub async fn contains() {
    while let (Ok(value), Ok(Value::Vec(vec))) = (value.recv_one().await, vec.recv_one().await) {
        check!(
            contains
                .send_one(vec.iter().any(|val| val.partial_equality_eq(&value)).into())
                .await
        )
    }
}

/// Concatenate `second` onto the end of `first` and return the combined vector.
#[mel_function(
    generic T ()
)]
pub fn concat(mut first: Vec<T>, mut second: Vec<T>) -> Vec<T> {
    first.append(&mut second);
    first
}

/// Pair-wise concatenation over two streams.
///
/// For each (`first`, `second`) pair received from the two streams, append `second` to `first` and emit the result through `concatened`.
#[mel_treatment(
    generic T ()
    input first Stream<Vec<T>>
    input second Stream<Vec<T>>
    output concatened Stream<Vec<T>>
)]
pub async fn concat() {
    while let (Ok(Value::Vec(mut first)), Ok(Value::Vec(mut second))) =
        (first.recv_one().await, second.recv_one().await)
    {
        first.append(&mut second);
        check!(concatened.send_one(Value::Vec(first)).await)
    }
}