23 lines
875 B
C#
23 lines
875 B
C#
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using CanonSharp.Combinator.Abstractions;
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using CanonSharp.Combinator.Extensions;
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namespace CanonSharp.Combinator.Parsers.Primitives;
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/// <summary>
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/// 跳过指定数量的输入令牌
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/// </summary>
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/// <param name="count">需要跳过的令牌数量</param>
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/// <typeparam name="TToken">输入流类型</typeparam>
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internal sealed class SkipParser<TToken>(int count) : PrimitiveParser<TToken, Unit>
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{
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protected override ParseResult<TToken, Unit> Run<TState>(TState state)
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{
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List<TState> result = state.AsEnumerable<TToken, TState>().Take(count).ToList();
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return result.Count == count
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? ParseResultBuilder.Succeed<TToken, TState, Unit>(Unit.Instance,
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result.Count == 0 ? state : result.Last().Next)
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: ParseResultBuilder.Fail<TToken, TState, Unit>("An input does not have required length.", state);
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}
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}
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