[swift-evolution] Be able to initialise empty dict with array constrcutor

[Jeremy Pereira]

I don’t understand what the problem is

> On 5 Jan 2016, at 12:39, James Campbell via swift-evolution <swift-evolution at swift.org> wrote:
> 
> See this code:
> var distanceCache: [Int: Int] = Dictionary<Int, Int>()
> 
> It is very long and tedious to write especially if what I am storing changes.
> 
> I propose we be allowed to do the following:
> var distanceCache: [Int: Int] = []

You can do 

var distanceCache: [Int: Int] = [:]

Also

var distanceCache2 = [Int: Int]()


> Perhaps this dictionary syntax is just confusing and it was a bad idea to make it the same as an array. Most languages use "{" so why did swift choose to share "[" with arrays and dictionaries.

It’s not the same, you need the colons inside. I imagine that braces were discarded on the grounds that it would confuse the compiler with respect to closures, for example

var myClosure = {} // is a variable of type () -> ()


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