Pitch: Eliding commas from multiline expression lists

[nate_chandler]

@Michael_Ilseman

However, I am sympathetic to things that can enable better looking EDSLs in Swift.

That's a great point. In fact, @anandabits had a very nice example of exactly this use case in the original thread where this was pitched about three years ago: SE-0084 spinoff: Newlines as item separators - #12 by anandabits . In addition to his excellent example, he makes the following point:

@anandabits

The difference isn’t super significant, but IMO every bit of unnecessary / undesirable syntactic noise in an EDSL is a flaw. The less noise the language requires the better it is for creating EDSLs. You want to be able to approximate the syntax you might design from scratch relatively closely.

Thanks for this piece of feedback too:

@Michael_Ilseman

You're going to want to build a strong case with as many examples and future directions as you can find.

I will survey the examples you listed and more and update the pitch with "before and after", illustrating the readability benefits of comma elision.