SimilarTo.fromJson constructor

SimilarTo.fromJson(Object? json_)

Returns a new instance from a JSON value. May throw if the value does not have the expected structure.

Implementation

factory SimilarTo.fromJson(Object? json_) {
  final json = json_ is Map
      ? _spec.fields.map((f) => json_[f.label]).toList(growable: false)
      : json_;
  return switch (json) {
    [final negated, final expr, final pattern, final escapeChar] ||
    (final negated, final expr, final pattern, final escapeChar) =>
      SimilarTo(
        negated: negated! as bool,
        expr: ExprRef.fromJson(expr),
        pattern: ExprRef.fromJson(pattern),
        escapeChar:
            Option.fromJson(escapeChar, (some) => some! as String).value,
      ),
    _ => throw Exception('Invalid JSON $json_')
  };
}