Specifically on "Arguments" under
https://golang.org/ref/spec#Primary_expressions, I'm confused as to what
purpose Type and [ "," ] have in the production.
If I am reading the section correctly,
Arguments = "(" [ ( ExpressionList | Type [ "," ExpressionList ] ) [
"..." ] [ "," ] ] ")" .
refers to function calls. And intuitively, a function call can consist of
zero or more Expressions delimited by commas, with the last argument
optionally terminating with "...". However, the production for Arguments
looks like it allows a function call to
1. Optionally include a type as an argument
2. Optionally end with a trailing comma
I understand that semantically these may not be allowed, but it doesn't
make sense to me why they would be specified in the first place. This would
be the production I would have thought of:
Arguments = "(" [ ExpressionList [ "..." ] ] ")" .
What does the production for Arguments syntactically permit? Also, if the
production isn't just for a function call, what does it refer to?
Thank You,
Akhil Indurti
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