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Robert Griesemer 5279e534b5 cmd/compile/internal/syntax: allow eliding interface in constraint literals
This CL permits an arbitrary type as well as the type sets  ~T and A|B
in constraint position, without the need of a surrrounding interface.
For instance, the type parameter list

	[P interface{ ~map[K]V }, K comparable, V interface{ ~string }]

may be written as

	[P ~map[K]V, K comparable, V ~string]

The feature must be enabled explicitly with the AllowTypeSets mode
and is only available if AllowGenerics is set as well.

For #48424.

Change-Id: Ic70bb97a49ff75e67e040853eac10e6aed0fef1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/353133
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-10-01 17:18:20 +00:00
.github .github: update IRC server 2021-09-30 19:56:27 +00:00
api [dev.fuzz] all: merge master (65f0d24) into dev.fuzz 2021-09-09 09:23:26 -07:00
doc cmd/go: add release note for 'go get' changes 2021-09-28 17:19:19 +00:00
lib/time lib/time: fix RFC 6557 url 2021-08-15 02:18:46 +00:00
misc cmd/cgo: add go:notinheap annotation to Windows handle types 2021-09-22 18:10:24 +00:00
src cmd/compile/internal/syntax: allow eliding interface in constraint literals 2021-10-01 17:18:20 +00:00
test test: update test/codegen/noextend.go to work with either ABI on ppc64x 2021-09-29 17:30:11 +00:00
.gitattributes all: treat all files as binary, but check in .bat with CRLF 2020-06-08 15:31:43 +00:00
.gitignore internal/buildcfg: move build configuration out of cmd/internal/objabi 2021-04-16 19:20:53 +00:00
AUTHORS A+C: update name to real name and add to AUTHORS 2021-09-16 23:57:28 +00:00
codereview.cfg codereview.cfg: add codereview.cfg for master branch 2021-02-19 18:44:53 +00:00
CONTRIBUTING.md all: restore changes from faulty merge/revert 2018-02-12 20:13:59 +00:00
CONTRIBUTORS A+C: update name to real name and add to AUTHORS 2021-09-16 23:57:28 +00:00
LICENSE
PATENTS
README.md README.md: update contribute URL 2021-09-30 13:33:21 +00:00
SECURITY.md SECURITY.md: update go versions 2019-09-26 15:34:57 +00:00

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