check method

  1. @override
void check(
  1. DcqRegistry registry
)

Implementation

@override
void check(
  DcqRegistry registry,
) {
  registry.addClassDeclaration((node) {
    final superclass = node.extendsClause?.superclass;
    if (superclass == null) return;
    if (superclass.name.lexeme != 'State') return;
    if (!isFromExpectedPackage(superclass, 'flutter')) return;

    var hasMutableField = false;

    final body = node.body;
    if (body is! BlockClassBody) return;
    for (final member in body.members) {
      if (member is! FieldDeclaration) continue;
      if (member.isStatic) continue;

      final fields = member.fields;
      if (!fields.isFinal && !fields.isConst) {
        hasMutableField = true;
        break;
      }
    }

    if (!hasMutableField) {
      reportAtToken(node.namePart.typeName);
    }
  });
}