How to correctly specify autoload for classes without namespace in composer?

Question

PHP

- vendor
  - author
    - package
      - path1
        - Class2.php (namespace path1;)
      - path2
        - Class2.php (namespace path2;)
      - BaseClass.php (without namespace)
      - composer.json <--  autoloader

It turns out somewhere

$baseClass = new BaseClass();
$class2 = new \path1\Class2();
$class2 = new \path2\Class2();

composer.json, now I have one.

"autoload": {
  "classmap": [
    "path1",
    "path2",
  ],
  "files": [
    "BaseClass.php",
  ]
}

Everything is working. But the inconvenience is that it is necessary to list all base classes and all folders ((. I feel that there is an easier way that will be solved with one or two lines in "autoload", through psr-4 or psr-0 it can be somehow. But I don’t understand , what needs to be written so that the classes are loaded as they are now.

Answer 1

But I don’t understand what needs to be written so that the classes are loaded as they are now.

Namespaces.