/*******************************************************************************
 *
 *    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 `RcConditionalFunction` public type.

#![allow(unused_imports)]

use super::*;

// ============================================================================
// RcConditionalFunction - Rc-based Conditional Function
// ============================================================================

/// RcConditionalFunction struct
///
/// A single-threaded conditional function that only executes when a
/// predicate is satisfied. Uses `RcFunction` and `RcPredicate` for shared
/// ownership within a single thread.
///
/// This type is typically created by calling `RcFunction::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 `ArcConditionalFunction`
///
/// # Examples
///
/// ```rust
/// use qubit_function::{Function, RcFunction};
///
/// let double = RcFunction::new(|x: &i32| x * 2);
/// let identity = RcFunction::<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 RcConditionalFunction<T, R> {
    pub(super) function: RcFunction<T, R>,
    pub(super) predicate: RcPredicate<T>,
}

// Use macro to generate conditional function implementations
impl_shared_conditional_function!(
    RcConditionalFunction<T, R>,
    RcFunction,
    Function,
    'static
);

// Use macro to generate conditional function clone implementations
impl_conditional_function_clone!(RcConditionalFunction<T, R>);

// Use macro to generate conditional function debug and display implementations
impl_conditional_function_debug_display!(RcConditionalFunction<T, R>);
