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,
) {
  void checkMembers(List<ClassMember> members) {
    final List<ConstructorDeclaration> ctors = members
        .whereType<ConstructorDeclaration>()
        .toList();
    if (ctors.length < 2) return;

    int unnamed = 0;
    final Map<String, int> perName = <String, int>{};
    for (final ConstructorDeclaration c in ctors) {
      final Token? nameTok = c.name;
      if (nameTok == null) {
        unnamed++;
      } else {
        final String n = nameTok.lexeme;
        perName[n] = (perName[n] ?? 0) + 1;
      }
    }
    if (unnamed > 1) {
      for (final ConstructorDeclaration c in ctors) {
        if (c.name == null) reporter.atNode(c, code);
      }
    }
    for (final MapEntry<String, int> e in perName.entries) {
      if (e.value <= 1) continue;
      for (final ConstructorDeclaration c in ctors) {
        if (c.name?.lexeme == e.key) reporter.atNode(c, code);
      }
    }
  }

  context.addClassDeclaration(
    (ClassDeclaration node) => checkMembers(node.bodyMembers),
  );
  context.addEnumDeclaration(
    (EnumDeclaration node) => checkMembers(node.bodyMembers),
  );
}