This is a tangent from the original question, but is __shared a planned
feature? Or just experimental work?
Dave
> On Dec 11, 2017, at 17:12, Slava Pestov <spes...@apple.com> wrote:
>
> Sorry, what I meant is that they make sense with our language model, but it’s
> not surprising that it doesn’t work today. In any case, __shared is not yet
> completely implemented or even designed, so it doesn’t matter.
>
> Slava
>
>> On Dec 11, 2017, at 2:05 PM, David Zarzycki <d...@znu.io> wrote:
>>
>> Hi Slava,
>>
>> Interesting. Did I make a mistake in my test then? Both __shared @escaping
>> and __shared @autoclosure are failing below.
>>
>> Dave
>>
>>> On Dec 11, 2017, at 16:58, Slava Pestov via swift-dev <swift-dev@swift.org>
>>> wrote:
>>>
>>> I think perhaps __shared @escaping and __shared @autoclosure should be OK.
>>> You’re just passing the context as a +0 value instead of +1. Also __shared
>>> varargs make sense for the same reason. But it’s not important to get that
>>> working right now.
>>>
>>> The others look OK.
>>>
>>> Slava
>>>
>>>> On Dec 11, 2017, at 1:15 PM, David Zarzycki via swift-dev
>>>> <swift-dev@swift.org> wrote:
>>>>
>>>> Hello! I’m trying to test which ParameterTypeFlags flag combinations are
>>>> valid. I wrote the following test case. Are the results “as expected”, or
>>>> are some of the failures incorrect?
>>>>
>>>> // RUN: %target-typecheck-verify-swift
>>>>
>>>>
>>>> //
>>>> // isVariadic is NOT compatible with any flag combinations
>>>> //
>>>> // expected-error@+1 {{@autoclosure must not be used on variadic
>>>> parameters}}
>>>> func v_and_autoclosure(arg : @autoclosure ()->()...) {}
>>>> // expected-error@+1 {{@escaping attribute may only be used in function
>>>> parameter position}}
>>>> func v_and_escaping(arg : @escaping ()->()...) {}
>>>> // expected-error@+1 {{'inout' must not be used on variadic parameters}}
>>>> func v_and_inout(arg : inout Int...) {}
>>>> // expected-error@+1 {{'__shared' must not be used on variadic parameters}}
>>>> func v_and_shared(arg : __shared Int...) {}
>>>>
>>>> //
>>>> // 'inout' is NOT compatible with remaining parameter flag combinations
>>>> //
>>>> // expected-error@+1 {{parameter must not have multiple '__owned',
>>>> 'inout', '__shared', 'var', or 'let' specifiers}}
>>>> func inout_and_shared(arg : inout __shared Int) {}
>>>> // expected-error@+1 {{'inout' may only be used on parameters}}
>>>> func inout_and_escaping(arg : @escaping inout ()->()) {}
>>>> // expected-error@+1 {{@escaping attribute may only be used in function
>>>> parameter position}}
>>>> func escaping_and_inout(arg : inout @escaping ()->()) {}
>>>> // expected-error@+1 {{@autoclosure may only be used on parameters}}
>>>> func inout_and_autoclosure(arg : inout @autoclosure ()->()) {}
>>>> // expected-error@+1 {{'inout' may only be used on parameters}}
>>>> func autoclosure_and_inout(arg : @autoclosure inout ()->()) {}
>>>>
>>>> //
>>>> // '__shared' is NOT compatible with remaining parameter flag combinations
>>>> //
>>>> // expected-error@+1 {{'__shared' may only be used on parameters}}
>>>> func autoclosure_and_shared(arg : @autoclosure __shared ()->()) {}
>>>> // expected-error@+1 {{@autoclosure may only be used on parameters}}
>>>> func shared_and_autoclosure(arg : __shared @autoclosure ()->()) {}
>>>> // expected-error@+1 {{'__shared' may only be used on parameters}}
>>>> func escaping_and_shared(arg : @escaping __shared ()->()) {}
>>>> // expected-error@+1 {{@escaping attribute may only be used in function
>>>> parameter position}}
>>>> func shared_and_escaping(arg : __shared @escaping ()->()) {}
>>>>
>>>> //
>>>> // @autoclosure and @escaping are the only valid parameter flag
>>>> combinations
>>>> //
>>>> func autoclosure_and_escaping(arg : @autoclosure @escaping ()->()) {}
>>>> func escaping_and_autoclosure(arg : @escaping @autoclosure ()->()) {}
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