mirror of
https://github.com/GeWuYou/GFramework.git
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b2e8ed9787
- 移除 EnumerableExtensions 扩展类及其 Map、Filter、Reduce 方法 - 从 ControlExtensions 中删除 Match、MatchOrDefault、If、IfElse 等控制流方法 - 重命名 FunctionExtensions 中的 Memoize 为 MemoizeUnbounded 并更新文档注释 - 重命名 FunctionExtensions 中的 Partial 相关方法并调整参数命名 - 在 PipeExtensions 中移除 Pipe、Then、After、Let 等方法，保留 Also 方法 - 删除多个功能性类型扩展文件，包括 Option、Result、NullableExtensions 等 - 移除功能扩展的 README.md 文档文件 - 更新相关命名空间引用和依赖关系 - [release ci]
104 lines
2.8 KiB
C#
104 lines
2.8 KiB
C#
// Copyright (c) 2025 GeWuYou
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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using System.Collections.Concurrent;
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namespace GFramework.Core.functional.functions;
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/// <summary>
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/// 函数式编程扩展方法集合，提供柯里化、偏函数应用、重复执行、安全执行和缓存等功能
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/// </summary>
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public static class FunctionExtensions
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{
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#region Repeat
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/// <summary>
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/// Repeat：对值重复应用函数 n 次
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/// </summary>
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/// <exception cref="ArgumentOutOfRangeException">
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/// 当 times 小于 0 时抛出
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/// </exception>
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public static T Repeat<T>(
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this T value,
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int times,
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Func<T, T> func)
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{
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ArgumentOutOfRangeException.ThrowIfNegative(times);
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var result = value;
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for (var i = 0; i < times; i++)
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{
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result = func(result);
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}
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return result;
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}
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#endregion
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#region Try → Result
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/// <summary>
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/// Try：安全执行并返回 language-ext 的 Result
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/// </summary>
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public static Result<TResult> Try<TSource, TResult>(
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this TSource value,
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Func<TSource, TResult> func)
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{
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try
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{
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return new Result<TResult>(func(value));
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}
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catch (Exception ex)
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{
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return new Result<TResult>(ex);
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}
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}
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#endregion
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#region Memoize (Unbounded / Unsafe)
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/// <summary>
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/// MemoizeUnbounded：
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/// 对函数结果进行无界缓存（线程安全）
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///
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/// ⚠ 注意：
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/// - 缓存永不释放
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/// - TSource 必须具有稳定的 Equals / GetHashCode
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/// - 仅适用于纯函数
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/// </summary>
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public static Func<TSource, TResult> MemoizeUnbounded<TSource, TResult>(
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this Func<TSource, TResult> func)
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where TSource : notnull
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{
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var cache = new ConcurrentDictionary<TSource, TResult>();
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return key => cache.GetOrAdd(key, func);
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}
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#endregion
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#region Partial (Advanced)
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/// <summary>
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/// Partial：部分应用（二参数函数固定第一个参数）
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///
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/// ⚠ 偏函数应用属于高级用法，不建议在业务代码滥用
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/// </summary>
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public static Func<T2, TResult> Partial<T1, T2, TResult>(
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this Func<T1, T2, TResult> func,
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T1 firstArg)
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=> second => func(firstArg, second);
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#endregion
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} |