> On 28 Nov 2014, at 09:31, Dmitry Stogov <dmi...@zend.com> wrote:
> 
> I prefer option (3) - invariant return types.
> Actually, return type compatibility check should follow all the rules for
> parameter type compatibility check (may be even reuse or share the code).

No, it shouldn't match parameters, that'd break type safety. What's safe for 
parameters is the opposite of what's safe for return types. The exception is 
invariance, which is safe for both.

--
Andrea Faulds
http://ajf.me/
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