On 05/12/2016 01:50 PM, Lester Caine wrote: > On 12/05/16 12:39, Michael Wallner wrote: >> On 12/05/16 13:36, Lester Caine wrote: >>>> On 12/05/16 11:21, Davey Shafik wrote: >>>>>> E.g. the behavior of passing executing with a null value for the >>>>>> argument is something you should be consciously making a decision on, >>>>>> and passing in null explicitly. >>>> I was actually getting the logic wrong... the problem with this proposal >>>> is that I HAVE to add the '?' for many of my libraries to continue to >>>> work simply because they do handle the null case. So what was a working >>>> system is broken by this change. >>>> >> So you already have function foo(Foo $foo = null)? >> No need to change anything. > To be honest I don't know ... *I* would not necessarily add '= null' > because that is the default case anyway ... I'm not sure fromthis > 'little change' just what the full knock on effect is to code that goes > back 15 years? you don't need to add '= null' or '?' anywhere. function that already accepts null arguments (either because it's untyped or because there is '= null') will continue to accept without any changes
adding '?' will make the function more permissive. not adding it will not make any existing function more restrictive > -- Mathieu Rochette
