TryCast.fromJson constructor
TryCast.fromJson(
- 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_')
};
}