tomYamlToPlain function

Object? tomYamlToPlain(Object? node)

Converts a value package:yaml produced into plain Dart: every YamlMap becomes a Map<String, Object?> (keys by their toString), every YamlList a List<Object?>, recursively; scalars pass through.

Plain maps and lists are converted too, so a value that is partly parsed YAML and partly built in code comes back in one shape. A caller compares, copies and casts the result without meeting a YamlMap, whose UnmodifiableMapView and node spans are a parser's business.

Implementation

Object? tomYamlToPlain(Object? node) {
  if (node is yaml.YamlMap || node is Map) {
    return <String, Object?>{
      for (final entry in (node as Map).entries)
        entry.key.toString(): tomYamlToPlain(entry.value),
    };
  }
  if (node is yaml.YamlList || node is List) {
    return [for (final item in node as List) tomYamlToPlain(item)];
  }
  return node;
}