[swift-evolution] Carriage Return in Collection Array Literal Initializer

[Ivan Oparin]

Sometimes in is necessary to initialize a collection with a long list of items. Consider this example:

let dictionaryWithALotOfItems = ["someString0" : SomeFunctionality.0, "someString1" : SomeFunctionality.0, "someString2" : SomeFunctionality.0, "someString3" : SomeFunctionality.1, "someString4" : SomeFunctionality.1]

items are separated with a comma, and we can ommit it for the last item.

However, sometimes we deal with longer collections and we can make the code more readable by writing each item on it's own line:

let dictionaryWithALotOfItems = [
    "someString0" : SomeFunctionality.0,
    "someString1" : SomeFunctionality.0,
    "someString2" : SomeFunctionality.0,
    "someString3" : SomeFunctionality.1,
    "someString4" : SomeFunctionality.1
]

now it looks much better except the comma in the end of line does not look natural

that is espessialy true for the line with a closure:
    "someString5" : SomeFunctionality.2 { some functionality },

some closures are longer:
    "someString6" : SomeFunctionality.3 {
        some 
        long
        closure
        functionality
    },

if Swift could treat carriage return in array literal initializer as a separation for the items, that would make some collections look cleaner:

let dictionaryWithALotOfItems = [
    "someString0" : SomeFunctionality.0
    "someString1" : SomeFunctionality.0
    "someString2" : SomeFunctionality.0
    "someString3" : SomeFunctionality.1
    "someString4" : SomeFunctionality.1
]

just like a line without a semicolon looks better