[swift-evolution] [Review] SE-0066: Standardize function type argument syntax to require parentheses

[Chris Lattner]

> On Apr 26, 2016, at 5:56 AM, Vladimir.S via swift-evolution <swift-evolution at swift.org> wrote:
> 
> On 26.04.2016 9:38, Goffredo Marocchi via swift-evolution wrote:
> >
> > Agreed, the exception for the parameter list in a closure declaration
> > should be gone too potentially, I do not see a very convincing case why we
> > should keep it. Does it solve some particular problem now in its current form?
> 
> Probably support. If we want to be clear about if parameter list is a tuple or it is a list of values i.e. (Int,Int) -> Void  vs  ((Int,Int)) -> Void , IMO we should be also clear about parameter list in a closure declaration..
> 
> But it seems right now it is not just about syntax:

Yes, closure expressions have other problems.  For example, if a closure expression contextually takes two parameters, it is invalid to use $0 without also using $1.  :-(

-Chris