Robert Griesemer 753ad5e1d5 spec: document that trailing comma is valid after index in index expressions ... At parse time we don't know if a[i] is an index expression or a type (or function) instantiation. Because instantiations accept a list of type arguments, and argument lists permit a trailing comma, a[i,] is either an instantiation or index expression. Document that a trailing comma is permitted in the syntax for index expressions. For comparison, the same problem arises with conversions which cannot be distinguished from function calls at parse time. The spec also permits a trailing comma for conversions T(x,). The grammar adjustment is the same (see line 5239). Fixes #55007. Change-Id: Ib9101efe52031589eb95a428cc6dff940d939f9e Reviewed-on: https://go-review.googlesource.com/c/go/+/452618 Reviewed-by: Ian Lance Taylor <iant@google.com> Reviewed-by: Matthew Dempsky <mdempsky@google.com> Reviewed-by: Robert Griesemer <gri@google.com> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Robert Griesemer <gri@google.com> Auto-Submit: Robert Griesemer <gri@google.com>		2022-11-23 00:25:08 +00:00
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asm.html	doc/asm: fix HTML markup	2021-09-10 17:15:37 +00:00
go1.17_spec.html	spec: fix a broken link	2021-11-11 19:44:13 +00:00
go1.20.html	archive/tar, archive/zip: disable ErrInsecurePath by default	2022-11-22 18:11:34 +00:00
go_mem.html	doc: fix typos in Go memory model	2022-06-10 22:10:29 +00:00
go_spec.html	spec: document that trailing comma is valid after index in index expressions	2022-11-23 00:25:08 +00:00