Reflection Validator

When might it be useful?

Sometimes you may want to have an unlimited sequence of methods, which cannot be restricted/controlled by the interface. In this case on a "compilation" stage, you can restrict those methods to follow the standards you expect.

A real example from Drupal/Symfony world: http://cgit.drupalcode.org/form_alter_service/tree/src/FormAlterCompilerPass.php

Examples

Besides of fully-operable examples, you can check a quick use case:

(new MethodValidator(object<ReflectionMethod>, string<FQCN>))
    ->addArgument(
        (new ArgumentSpecification('form'))
            ->setType('array')
            ->setOptional(false)
            ->setPassedByReference(true)
    )
    ->addArgument(
        (new ArgumentSpecification('formState'))
            ->setType(Iterator::class)
            ->setOptional(false)
            ->setPassedByReference(false)
    );