qubit-function 0.11.1

/*******************************************************************************
 *
 *    Copyright (c) 2025 - 2026 Haixing Hu.
 *
 *    SPDX-License-Identifier: Apache-2.0
 *
 *    Licensed under the Apache License, Version 2.0.
 *
 ******************************************************************************/
// qubit-style: allow explicit-imports
//! Defines the `RcConditionalTransformer` public type.

#![allow(unused_imports)]

use super::*;

// ============================================================================
// RcConditionalTransformer - Rc-based Conditional Transformer
// ============================================================================

/// RcConditionalTransformer struct
///
/// A single-threaded conditional transformer that only executes when a
/// predicate is satisfied. Uses `RcTransformer` and `RcPredicate` for shared
/// ownership within a single thread.
///
/// This type is typically created by calling `RcTransformer::when()` and is
/// designed to work with the `or_else()` method to create if-then-else logic.
///
/// # Features
///
/// - **Shared Ownership**: Cloneable via `Rc`, multiple owners allowed
/// - **Single-Threaded**: Not thread-safe, cannot be sent across threads
/// - **Conditional Execution**: Only transforms when predicate returns `true`
/// - **No Lock Overhead**: More efficient than `ArcConditionalTransformer`
///
/// # Examples
///
/// ```rust
/// use qubit_function::{Transformer, RcTransformer};
///
/// let double = RcTransformer::new(|x: i32| x * 2);
/// let identity = RcTransformer::<i32, i32>::identity();
/// let conditional = double.when(|x: &i32| *x > 0).or_else(identity);
///
/// let conditional_clone = conditional.clone();
///
/// assert_eq!(conditional.apply(5), 10);
/// assert_eq!(conditional_clone.apply(-5), -5);
/// ```
///
pub struct RcConditionalTransformer<T, R> {
    pub(super) transformer: RcTransformer<T, R>,
    pub(super) predicate: RcPredicate<T>,
}

// Implement RcConditionalTransformer
impl_shared_conditional_transformer!(
    RcConditionalTransformer<T, R>,
    RcTransformer,
    Transformer,
    into_rc,
    'static
);

// Use macro to generate Debug and Display implementations
impl_conditional_transformer_debug_display!(RcConditionalTransformer<T, R>);

// Implement Clone for RcConditionalTransformer
impl_conditional_transformer_clone!(RcConditionalTransformer<T, R>);