68 lines
2.2 KiB
C#
68 lines
2.2 KiB
C#
namespace NubLang.Code;
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public readonly struct SourceSpan : IEquatable<SourceSpan>, IComparable<SourceSpan>
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{
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public static SourceSpan Zero => new(SourceLocation.Zero, SourceLocation.Zero);
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public static SourceSpan Merge(params IEnumerable<SourceSpan> spans)
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{
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var spanArray = spans as SourceSpan[] ?? spans.ToArray();
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if (spanArray.Length == 0)
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{
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return Zero;
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}
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var minStart = spanArray.Min(s => s.Start);
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var maxEnd = spanArray.Max(s => s.End);
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return new SourceSpan(minStart, maxEnd);
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}
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public SourceSpan(SourceLocation start, SourceLocation end)
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{
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if (start > end)
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{
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throw new ArgumentException("Start location cannot be after end location");
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}
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Start = start;
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End = end;
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}
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public SourceLocation Start { get; }
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public SourceLocation End { get; }
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public override string ToString()
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{
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if (Start == End)
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{
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return $"{Start}";
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}
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if (Start.Line == End.Line)
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{
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return Start.Column == End.Column ? $"{Start}" : $"{Start.Line}:{Start.Column}-{End.Column}";
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}
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return $"{Start}-{End}";
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}
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public bool Equals(SourceSpan other) => Start == other.Start && End == other.End;
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public override bool Equals(object? obj) => obj is SourceSpan other && Equals(other);
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public override int GetHashCode() => HashCode.Combine(typeof(SourceSpan), Start, End);
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public static bool operator ==(SourceSpan left, SourceSpan right) => Equals(left, right);
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public static bool operator !=(SourceSpan left, SourceSpan right) => !Equals(left, right);
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public static bool operator <(SourceSpan left, SourceSpan right) => left.CompareTo(right) < 0;
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public static bool operator <=(SourceSpan left, SourceSpan right) => left.CompareTo(right) <= 0;
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public static bool operator >(SourceSpan left, SourceSpan right) => left.CompareTo(right) > 0;
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public static bool operator >=(SourceSpan left, SourceSpan right) => left.CompareTo(right) >= 0;
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public int CompareTo(SourceSpan other)
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{
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var startComparison = Start.CompareTo(other.Start);
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return startComparison != 0 ? startComparison : End.CompareTo(other.End);
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}
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} |