32 lines
787 B
C#
32 lines
787 B
C#
namespace DevDisciples.Parsing;
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public abstract class ParsableStream<T>
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{
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private readonly ReadOnlyMemory<T> _tokens;
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protected ReadOnlySpan<T> Tokens => _tokens.Span;
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protected int Position { get; set; }
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public T Current => Position < Tokens.Length ? Tokens[Position] : default!;
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protected ParsableStream(ReadOnlyMemory<T> tokens)
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{
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_tokens = tokens;
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}
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public virtual T Advance()
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{
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return Position + 1 <= Tokens.Length ? Tokens[++Position - 1] : default!;
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}
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public virtual T Peek(int offset = 0)
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{
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return Position + offset < Tokens.Length ? Tokens[Position + offset] : default!;
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}
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public virtual bool Ended()
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{
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return Position >= Tokens.Length;
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}
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} |