SourceSpan union()

in lib/src/span_mixin.dart [32:50]

• 16 lines of code
• 5 McCabe index (conditional complexity)

  SourceSpan union(SourceSpan other) {
    if (sourceUrl != other.sourceUrl) {
      throw ArgumentError('Source URLs "$sourceUrl" and '
          " \"${other.sourceUrl}\" don't match.");
    }

    final start = min(this.start, other.start);
    final end = max(this.end, other.end);
    final beginSpan = start == this.start ? this : other;
    final endSpan = end == this.end ? this : other;

    if (beginSpan.end.compareTo(endSpan.start) < 0) {
      throw ArgumentError('Spans $this and $other are disjoint.');
    }

    final text = beginSpan.text +
        endSpan.text.substring(beginSpan.end.distance(endSpan.start));
    return SourceSpan(start, end, text);
  }