qubit-function 0.11.0

Functional programming traits and Box/Rc/Arc adapters for Rust, inspired by Java functional interfaces
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

/*******************************************************************************
 *
 *    Copyright (c) 2025 - 2026.
 *    Haixing Hu, Qubit Co. Ltd.
 *
 *    All rights reserved.
 *
 ******************************************************************************/
//! Defines the `RcBiPredicate` public type.

#![allow(unused_imports)]

use super::*;

/// An Rc-based bi-predicate with single-threaded shared ownership.
///
/// This type is suitable for scenarios where the bi-predicate needs
/// to be reused in a single-threaded context. Composition methods
/// borrow `&self`, allowing the original bi-predicate to remain
/// usable after composition.
///
/// # Examples
///
/// ```rust
/// use qubit_function::{BiPredicate, RcBiPredicate};
///
/// let pred = RcBiPredicate::new(|x: &i32, y: &i32| x + y > 0);
/// assert!(pred.test(&5, &3));
///
/// // Original bi-predicate remains usable after composition
/// let combined = pred.and(RcBiPredicate::new(|x, y| x > y));
/// assert!(pred.test(&5, &3));  // Still works
/// ```
///
/// # Author
///
/// Haixing Hu
pub struct RcBiPredicate<T, U> {
    pub(super) function: Rc<BiPredicateFn<T, U>>,
    pub(super) name: Option<String>,
}

impl<T, U> RcBiPredicate<T, U> {
    // Generates: new(), new_with_name(), name(), set_name(), always_true(), always_false()
    impl_predicate_common_methods!(
        RcBiPredicate<T, U>,
        (Fn(&T, &U) -> bool + 'static),
        |f| Rc::new(f)
    );

    // Generates: and(), or(), not(), nand(), xor(), nor()
    impl_shared_predicate_methods!(RcBiPredicate<T, U>, 'static);
}

// Generates: impl Clone for RcBiPredicate<T, U>
impl_predicate_clone!(RcBiPredicate<T, U>);

// Generates: impl Debug for RcBiPredicate<T, U> and impl Display for RcBiPredicate<T, U>
impl_predicate_debug_display!(RcBiPredicate<T, U>);

// Implements BiPredicate trait for RcBiPredicate<T, U>
impl<T, U> BiPredicate<T, U> for RcBiPredicate<T, U> {
    fn test(&self, first: &T, second: &U) -> bool {
        (self.function)(first, second)
    }

    // Generates: into_box(), into_rc(), into_fn(), to_box(), to_rc(), to_fn()
    impl_rc_conversions!(
        RcBiPredicate<T, U>,
        BoxBiPredicate,
        Fn(first: &T, second: &U) -> bool
    );
}