99 lines
2.9 KiB
C#
99 lines
2.9 KiB
C#
using Parser.Internal;
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using System;
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using System.Collections.Generic;
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using System.Collections.Immutable;
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using System.Linq;
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namespace Parser
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{
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public struct SyntaxToken : IEquatable<SyntaxToken>
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{
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private readonly SyntaxNode _parent;
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private readonly Internal.GreenNode _token;
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public TokenKind Kind => _token.Kind;
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public override string? ToString()
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{
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return _token.ToString();
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}
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internal SyntaxToken(SyntaxNode parent, Internal.GreenNode token, int position)
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{
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_parent = parent;
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_token = token ?? throw new ArgumentNullException(nameof(token));
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Position = position;
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FullSpan = new TextSpan(Position, token.FullWidth);
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}
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public SyntaxNode Parent => _parent;
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internal Internal.GreenNode Token => _token;
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public int Position { get; }
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public TextSpan FullSpan { get; }
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public TextSpan Span => CalculateSpan();
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public TextSpan CalculateSpan()
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{
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var leadingTriviaWidth = LeadingTrivia.Width;
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var trailingTriviaWidth = TrailingTrivia.Width;
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return new TextSpan(Position + leadingTriviaWidth, FullWidth - leadingTriviaWidth - trailingTriviaWidth);
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}
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public object? Value => _token.GetValue();
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public bool Equals(SyntaxToken other)
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{
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return Equals(_parent, other._parent) && Equals(_token, other._token);
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}
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public override bool Equals(object? obj)
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{
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if (ReferenceEquals(null, obj)) return false;
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return obj is SyntaxToken token && Equals(token);
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}
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public override int GetHashCode()
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{
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unchecked
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{
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return ((_parent != null ? _parent.GetHashCode() : 0) * 397) ^ (_token != null ? _token.GetHashCode() : 0);
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}
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}
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public static bool operator ==(SyntaxToken left, SyntaxToken right)
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{
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return left.Equals(right);
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}
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public static bool operator !=(SyntaxToken left, SyntaxToken right)
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{
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return !left.Equals(right);
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}
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public string Text => _token.Text;
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public string FullText => _token.FullText;
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public int FullWidth => _token.FullWidth;
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public bool IsMissing => _token.IsMissing;
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public SyntaxTriviaList LeadingTrivia
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{
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get
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{
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return new SyntaxTriviaList(this, Token.LeadingTriviaCore, this.Position);
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}
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}
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public SyntaxTriviaList TrailingTrivia
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{
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get
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{
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var trailingGreen = Token.TrailingTriviaCore;
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var trailingTriviaWidth = trailingGreen?.FullWidth ?? 0;
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return new SyntaxTriviaList(this, trailingGreen, this.Position + this.FullWidth - trailingTriviaWidth);
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}
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}
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}
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} |