runWithReporter method

@override void runWithReporter(SaropaDiagnosticReporter reporter, SaropaContext context)

Override this method to implement your lint rule.

Use context to register callbacks for AST node types:

context.addMethodInvocation((node) {
  if (condition) {
    reporter.atNode(node);
  }
});

Implementation

@override
void runWithReporter(
  SaropaDiagnosticReporter reporter,
  SaropaContext context,
) {
  context.addInstanceCreationExpression((InstanceCreationExpression node) {
    final typeName = node.constructorName.type.name.lexeme;
    if (typeName != 'DropdownButtonFormField') return;

    for (final arg in node.argumentList.arguments) {
      if (arg is NamedExpression && arg.name.label.name == 'value') {
        reporter.atNode(arg.name);
        return;
      }
    }
  });
}