23 lines
965 B
C#
23 lines
965 B
C#
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using CanonSharp.Combinator.Abstractions;
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using CanonSharp.Combinator.Extensions;
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using CanonSharp.Combinator.Parsers;
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namespace CanonSharp.Combinator.Text;
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/// <summary>
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/// 字符串解析器
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/// </summary>
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/// <param name="except">期望的字符串</param>
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/// <param name="comparison">字符串比较模式</param>
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public class StringParser(string except, StringComparison comparison) : PrimitiveParser<char, string>
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{
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protected override ParseResult<char, string> Run<TState>(TState state)
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{
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TState[] states = state.AsEnumerable<char, TState>().Take(except.Length).ToArray();
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string actual = new(states.Select(x => x.Current).ToArray());
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return string.Equals(except, actual, comparison)
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? ParseResultBuilder.Succeed<char, TState, string>(actual, states.Length == 0 ? state : states.Last().Next)
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: ParseResultBuilder.Fail<char, TState, string>($"Except '{except}' but found '{actual}.", state);
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}
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}
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