PhpFunctionUtil.getReturnType(): advanced analysis

[rentalhost]

Additional analysis (should check if all is applicable):

• [ ] Compound types: array, ~object~, callable (and iterable?);
• [ ] Resource type: resource;
• [ ] Callable type: callable;
• [ ] Void type: void;
  • [ ] From return;;
  • [ ] From no return statement;
• [ ] Make sure to ignores unreacheable return statements;
  • [ ] After the last return (eg. return; return $unreacheable;);
  • [ ] After an uncatched throw;
• [ ] Support to complex array types:
  • [ ] Return int[] from one type array (eg. [1, 2, 3]);
  • [ ] Return mixed[] from mixed type array (eg. [1, 'a', true]);
• [ ] Make sure that comparison returns bool (eg. return $a === $b);
• [ ] Make sure that expressions returns int (eg. return $a + $b);
• [ ] Make sure that concats returns string (eg. return $a . $b);