34 lines
1.5 KiB
C#
34 lines
1.5 KiB
C#
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namespace CanonSharp.Combinator.Abstractions;
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/// <summary>
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/// 成功解析结果基类
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/// </summary>
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/// <param name="value">实际的解析结果</param>
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/// <typeparam name="TToken">输入流类型</typeparam>
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/// <typeparam name="T">实际的解析结果类型</typeparam>
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public abstract class SuccessfulResult<TToken, T>(T value) : ParseResult<TToken, T>
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{
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public override T Value => value;
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/// <summary>
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/// 运行下一个解析器
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/// </summary>
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/// <param name="parser">下一个解析器</param>
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/// <param name="continuation">处理解析结果的后继函数</param>
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/// <typeparam name="TNext">下一个解析器返回的结果类型</typeparam>
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/// <typeparam name="TResult">最终的结果类型</typeparam>
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/// <returns>最终的结果</returns>
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protected abstract ParseResult<TToken, TResult> RunNext<TNext, TResult>(Parser<TToken, TNext> parser,
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Func<ParseResult<TToken, TNext>, ParseResult<TToken, TResult>> continuation);
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internal override ParseResult<TToken, TResult> Next<TNext, TResult>(Func<T, Parser<TToken, TNext>> nextParser,
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Func<ParseResult<TToken, TNext>, ParseResult<TToken, TResult>> continuation)
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=> RunNext(nextParser(Value), continuation);
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public override TResult CaseOf<TResult>(Func<SuccessfulResult<TToken, T>, TResult> successfulHandler,
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Func<FailedResult<TToken, T>, TResult> failedHandler)
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=> successfulHandler(this);
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public override string ToString() => Value?.ToString() ?? string.Empty;
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}
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