[swift-evolution] [Review] SE-0084: Allow trailing commas in parameter lists and tuples

[LM]

> On May 13, 2016, at 7:58 AM, Gwendal Roué via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
>> Le 13 mai 2016 à 07:01, Chris Lattner via swift-evolution <swift-evolution at swift.org> a écrit :
>> 
>> On May 12, 2016, at 4:50 PM, Joe Groff <jgroff at apple.com> wrote:
>>>>>    --- a.swift
>>>>>    +++ a.swift
>>>>>     foo(
>>>>>       x: 0,
>>>>>    -  y: 1
>>>>>    +  y: 1,
>>>>>    +  z: 2
>>>>>     )
>>>>> 
>>>>> Trailing commas avoid this:
>>>>> 
>>>>>    --- a.swift
>>>>>    +++ a.swift
>>>>>     foo(
>>>>>       x: 0,
>>>>>       y: 1,
>>>>>    +  z: 2,
>>>>>     )
>>>> 
>>>> You’re arguing that you want to read Swift code written like this?
>>> 
>>> I wouldn't mind it.
>> 
>> I personally find that style repulsive :-) and I haven’t seen swift code commonly doing it.  I’m not sure that we want to encourage it either.
> 
> Don't be too harsh :-) This style can be used with much profit when there are several closure arguments:
> 
>    foo(
>        x: {
>            // several lines of code
>        },
>        y: {
>            // several lines of code
>        }
>    )
> 

Sorry, but this kind of code writing evokes to me the kind of stream-of-consciousness-scripting I was happy to leave behind when I quit perl (or the one *modern* Javascript is ridden with). But I get it, it is an age old psych principle that it is easier for us to ask to be enabled than it is to self-discipline ourselves. I think it is an addiction lambdas have enabled... why would I have to think about the large scale structure of what I do when I can shove a bunch instructions as a parameter. don't get me wrong, i use lambdas a lot in java, but I use method references as soon as it starts to look smell like I am about to stuff all the logic as parameters.

Regards
LM
(From mobile)




> For example: https://github.com/groue/GRDBDemo/blob/cd8b9d5cadc3c6c66fd0da4869d820c6624fdf79/GRDBDemo/PersonsViewController.swift#L12-L44
> 
> Gwendal Roué
> 
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