TryCast.fromJson constructor

TryCast.fromJson(
  1. Object? json_
)

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

Implementation

factory TryCast.fromJson(Object? json_) {
  final json = json_ is Map
      ? _spec.fields.map((f) => json_[f.label]).toList(growable: false)
      : json_;
  return switch (json) {
    [final expr, final dataType] || (final expr, final dataType) => TryCast(
        expr: ExprRef.fromJson(expr),
        dataType: DataType.fromJson(dataType),
      ),
    _ => throw Exception('Invalid JSON $json_')
  };
}