INNER CODE UNIT · Dart

IndexConstraintId

hackware1993/Flutter_ConstraintLayout · lib/src/core.dart:394

class IndexConstraintId extends ConstraintId {
  /// [0, childCount-1]
  /// -1 represents the last element
  /// -2 represents the second to last element, and so on
  final int _siblingIndex;

  IndexConstraintId(this._siblingIndex)
      : super('parent.children[$_siblingIndex]');

  @override
  ConstraintId _copy() {
    return IndexConstraintId(_siblingIndex);
  }
}

/// A relative id type that is referenced by index offsets between child elements
class RelativeConstraintId extends ConstraintId {
  /// [-childCount+1),childCount-1]

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