I have a question about syntax. In my lang, I’ve tried to reduce the use of parens by using “infix” tokens. A simple example is my syntax for let: {let a = 1 b = 2 c = 3 #:in (+ a b c)} Ignoring aesthetics, a real advantage of this is that it helps provide clues when quickly reading/scanning code (e.g. a = 1 has a clear meaning, whereas (a 1) could mean anything).

So far, I have not used anything but whitespace to delimit such fragments. However, this does mean that single-line code can look a bit funny: {let a = 1 b = 2 c = 3 #:in (+ a b c)} My question is this: should I permit commas as an optional delimiter, for readability? If I did, then one could write: {let a = 1, b = 2, c = 3 #:in (+ a b c)} Thoughts?