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I propose to rename this proposal to "proposal-slice-expression", because I propose to have a syntactic representation for the SliceExpression, and 2 behaviors:
object[Symbol.slice](sliceExpression.startIndex, sliceExpression.endIndex, sliceExpression.step)
(cf Consider basing the semantics on a method call #1)@rbuckton proposed something similar in #19, I think we should not consider AssignmentExpression (
arr[0:2] = [3,4]
) because strings are immutable, the added complexity is probably not worth either