A massive -1 to this proposal. Eliminating parenthesis increases readability and mental parse-ability.
As my own datapoint, I have 276 instances of “[^) ] *->” across 93 source files in one of the apps I maintain. I love that I can do “T1 -> T2” as my function definitions, and the ability to leave out extraneous parentheses is an impetus for me to structure my code differently so that my closures take a single parameter. It means that I use typealiases for complex parameter types. Making this change would be a massive regression in Swift’s readability, IMO. Dave > On Apr 20, 2016, at 9:13 AM, Alan Skipp via swift-evolution > <swift-evolution@swift.org> wrote: > > A quick grep showed about 50 cases of using T1 -> T2 in my current project. > Not a huge amount, but not tiny either. It wouldn’t be a completely dreadful > change to make, just irritating having to add superfluous syntactical > appendages to pacify the computer. > >> On 20 Apr 2016, at 00:28, Jacob Bandes-Storch via swift-evolution >> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: >> >> On Tue, Apr 19, 2016 at 3:29 PM, Dave Abrahams via swift-evolution >> <swift-evolution@swift.org <mailto:swift-evolution@swift.org>> wrote: >> >> on Tue Apr 19 2016, Alan Skipp <swift-evolution@swift.org >> <mailto:swift-evolution@swift.org>> wrote: >> >> > I’d place the ability to omit parenthesises for single args in the same >> > category >> > as being able to omit `self` when accessing properties. They are small >> > conveniences that make a large difference to an entire codebase. >> >> Care to back that up with some measurements? Take one of your projects >> and find the instances of “[^) ] *->” >> >> How many places in the code are affected, and how much worse is the result? >> >> Here's one data point: including a small handful of false positives, I found >> 74 results in a project with 33 Swift files. >> >> "How much worse" is hard to answer. It certainly wouldn't be the worst thing >> in the world to add parens, but I'm not particularly compelled by the pro-() >> arguments in this thread. >> >> Jacob > > _______________________________________________ > swift-evolution mailing list > swift-evolution@swift.org > https://lists.swift.org/mailman/listinfo/swift-evolution
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