MacroArg.fromJson constructor

MacroArg.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 MacroArg.fromJson(Object? json_) {
  final json = json_ is Map
      ? _spec.fields.map((f) => json_[f.label]).toList(growable: false)
      : json_;
  return switch (json) {
    [final name, final defaultExpr] ||
    (final name, final defaultExpr) =>
      MacroArg(
        name: Ident.fromJson(name),
        defaultExpr:
            Option.fromJson(defaultExpr, (some) => Expr.fromJson(some)).value,
      ),
    _ => throw Exception('Invalid JSON $json_')
  };
}