ValueType.fromJson constructor
ValueType.fromJson(
- Object? json_
Returns a new instance from a JSON value. May throw if the value does not have the expected structure.
Implementation
factory ValueType.fromJson(Object? json_) {
Object? json = json_;
if (json is Map) {
final MapEntry(:key, :value) =
json.entries.firstWhere((e) => e.key != 'runtimeType');
json = (
key is int ? key : _spec.cases.indexWhere((c) => c.label == key),
value,
);
}
return switch (json) {
(0, null) || [0, null] => const ValueTypeI32(),
(1, null) || [1, null] => const ValueTypeI64(),
(2, null) || [2, null] => const ValueTypeF32(),
(3, null) || [3, null] => const ValueTypeF64(),
(4, null) || [4, null] => const ValueTypeV128(),
(5, final value) ||
[5, final value] =>
ValueTypeRef(RefType.fromJson(value)),
_ => throw Exception('Invalid JSON $json_'),
};
}