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Commit Graph

3890 Commits

Author SHA1 Message Date
Hana
b1c7703f26 doc/go1.18: discuss embedded build info compatibility
Fixes #50085

Change-Id: I9be8ddb983fb4fe598becbb0b93bb5b7e1f8438f
Reviewed-on: https://go-review.googlesource.com/c/go/+/372214
Trust: Hyang-Ah Hana Kim <hyangah@gmail.com>
Run-TryBot: Hyang-Ah Hana Kim <hyangah@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
2021-12-15 14:48:19 +00:00
Ian Lance Taylor
9d0ca262bb doc/go1.18: mention that embedding a type parameter is forbidden
For #47694

Change-Id: Ibf38eabcb78abc563fcf77e2b566175a18c06fa3
Reviewed-on: https://go-review.googlesource.com/c/go/+/372114
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2021-12-15 00:33:55 +00:00
Brad Fitzpatrick
dc5a8f9647 doc/go1.18: fix an unclosed anchor
Change-Id: I432bcc6ff917d008598b2f37c6e826f588a3d6d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/372074
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
2021-12-14 23:57:51 +00:00
Olivier Mengué
38c067d178 doc: fix typo in 1.18 release notes for package testing
In release notes for Go 1.18, fix typo in changes for package testing to
correctly document the change in CL 343883.

Change-Id: I40d92858ed3f74554a094466c06771f83dd81942
Reviewed-on: https://go-review.googlesource.com/c/go/+/371616
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Cherry Mui <cherryyz@google.com>
2021-12-14 23:55:40 +00:00
Ian Lance Taylor
1540239f48 doc/go1.18: add caution about use of generics in production
Per https://groups.google.com/g/golang-dev/c/iuB22_G9Kbo/m/7B1jd1I3BQAJ.

For #47694

Change-Id: I033cdadb2067e432f7c307d1546b4c5d0cfd5d8c
Reviewed-on: https://go-review.googlesource.com/c/go/+/371954
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-12-14 22:42:47 +00:00
Cherry Mui
fc8ae9860a doc/go1.18: move debug/buildinfo to core library section
It is a new package and seems a major change.

Updates #47694.

Change-Id: If854e494e28bcd1e79c99e59119755b9cb6793d6
Reviewed-on: https://go-review.googlesource.com/c/go/+/371816
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
2021-12-14 21:23:43 +00:00
Michael Matloob
265fbaa94b doc: update go1.18 release notes with a blurb about workspace mode
For #47694

Change-Id: I79cdbdc66ea9942b597f29c9a4f428075f053466
Reviewed-on: https://go-review.googlesource.com/c/go/+/371295
Trust: Michael Matloob <matloob@golang.org>
Run-TryBot: Michael Matloob <matloob@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Bryan Mills <bcmills@google.com>
2021-12-14 19:10:22 +00:00
Cherry Mui
46ba32a2ca doc/go1.18: remove residual TODOs
There doesn't seem anything that still needs to de done there.

Updates #47694.

Change-Id: I7909f566638332f3904d20a34f61d371af1d2da2
Reviewed-on: https://go-review.googlesource.com/c/go/+/371754
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Trust: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Alex Rakoczy <alex@golang.org>
2021-12-14 17:22:06 +00:00
Robert Griesemer
083ef54624 spec: fix conversion rules (match implementation)
As written, the conversion P(x), where P and the type
of x are type parameters with identical underlying types
(i.e., identical constraints), is valid. However, unless
the type of x and P are identical (which is covered with
the assignability rule), such a conversion is not valid
in general (consider the case where both type parameters
are different type parameters with constraint "any").

This change adjusts the rules to prohibit type parameters
in this case. The same reasoning applies and the analogue
change is made for pointer types.

The type checker already implements these updated rules.

Change-Id: Id90187900cb2820f6a0a0cf582cf26cdf8addbce
Reviewed-on: https://go-review.googlesource.com/c/go/+/371074
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-13 18:41:35 +00:00
Tim King
766f89b5c6 doc: document cmd/vet changes for 1.18 release
cmd/vet has several precision improvements for the checkers copylock, printf, sortslice, testinggoroutine, and tests. Adds a high level mention in the release notes and an example of string constant concatenation.

Updates #47694

Change-Id: I7a342a57ca3fd9e2f3e8ec99f7b647269798317f
Reviewed-on: https://go-review.googlesource.com/c/go/+/370734
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
Trust: Tim King <taking@google.com>
Run-TryBot: Tim King <taking@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
2021-12-10 19:26:50 +00:00
Robert Findley
d6c4583ad4 doc: document the new types.Config.GoVersion field
Also update some other go/types release notes to use the present tense.

Updates #47694

Change-Id: I654371c065e76fd5d22679d0d3c1a81bc3d1e513
Reviewed-on: https://go-review.googlesource.com/c/go/+/370235
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-12-08 23:38:20 +00:00
Robert Findley
9e29dd42df doc: document cmd/vet changes for generics in 1.18
Fixes #50011
Updates #47694

Change-Id: Id3d43f2f72de61b360b79c2b375ca1372d5f4692
Reviewed-on: https://go-review.googlesource.com/c/go/+/369979
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Tim King <taking@google.com>
2021-12-08 21:21:44 +00:00
Dan Scales
7b7efd7a7c doc: add in release note about compiler being roughly 15% slower
Updates #49569

Change-Id: Ifba769993c50bb547cb355f56934fb572ec17a1a
Reviewed-on: https://go-review.googlesource.com/c/go/+/370154
Reviewed-by: Austin Clements <austin@google.com>
Trust: Dan Scales <danscales@google.com>
2021-12-08 18:06:06 +00:00
Austin Clements
c759ec2284 doc/go1.18: clarify additions to net package API
For #47694.

Updates #46518.

Change-Id: Ife3a8d3d6a1c50f55b5ab15730d5a6bd3ec512e1
Reviewed-on: https://go-review.googlesource.com/c/go/+/370134
Trust: Austin Clements <austin@google.com>
Reviewed-by: Damien Neil <dneil@google.com>
2021-12-08 17:04:27 +00:00
Ian Lance Taylor
a19e72cb89 doc/go1.18: move fuzzing to tools section
For #47694

Change-Id: Idab1a5822a096447c71776ee4339c4262183ceb7
Reviewed-on: https://go-review.googlesource.com/c/go/+/370034
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
Trust: Katie Hockman <katie@golang.org>
2021-12-08 04:14:00 +00:00
Austin Clements
e08d1fba37 doc/go1.18: mention bytes.Cut and strings.Cut
For #47694.

Updates #46336.

Change-Id: Ibbd058a1fd4d6b0aa38d3e8dc15b560d1e149f7e
Reviewed-on: https://go-review.googlesource.com/c/go/+/369981
Trust: Austin Clements <austin@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-12-07 21:32:48 +00:00
Austin Clements
dc50d69119 doc/go1.18: drop TODO for "Changes to the language"
For #47694

Change-Id: I142776001eecb451e8722163cfd3f2ecb0ecf35c
Reviewed-on: https://go-review.googlesource.com/c/go/+/369980
Trust: Austin Clements <austin@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-12-07 21:31:42 +00:00
Jeremy Faller
085d6ff531 doc/go1.18: add docs for -count when benchmarking
CL 356669

Updates #47694

Change-Id: I49e0cdd3b34e81e9e44020a8eb1304d78249cd66
Reviewed-on: https://go-review.googlesource.com/c/go/+/368677
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Michael Pratt <mpratt@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-07 17:59:54 +00:00
Jeremy Faller
d16a57542a doc/go1.18: add new sync.[RW]Mutex methods
CL 319769

Updates #47694

Change-Id: I9655af0d249926617645c33617d53b73f985aa19
Reviewed-on: https://go-review.googlesource.com/c/go/+/368797
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-06 21:14:21 +00:00
Jeremy Faller
870f33f6ef doc/go1.18: add changes to strconv.Unquote to release notes
CL 343877

Updates #47694

Change-Id: I37a0a0d1f7ab937b12812981ecddc89eb8c99c24
Reviewed-on: https://go-review.googlesource.com/c/go/+/368796
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Joe Tsai <joetsai@digital-static.net>
2021-12-06 21:09:34 +00:00
Jeremy Faller
1c4cf50e11 doc/go1.18: add docs for js.Wrapper's removal
CL 356430

Updates #47694

Change-Id: I802cd50f2827caa0549c25685c0b1bb8dfc40968
Reviewed-on: https://go-review.googlesource.com/c/go/+/368799
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-12-06 21:02:48 +00:00
Jeremy Faller
0bbb74b5ac doc/go1.18: add changes to regexp to release notes
CL 354569

Updates #47694

Change-Id: I78536c110215b3c9f247c1420bcaa5fc3d8fb930
Reviewed-on: https://go-review.googlesource.com/c/go/+/368795
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-06 21:01:12 +00:00
Austin Clements
9ecb853cf2 doc/go1.18: minor tweaks to generics section
This CL reorders the bullet points in the generics section to more
closely match what I think users will consider most important. I put
the ~ token before the mention of ~T in interfaces to avoid a forward
reference, though I wonder if we actually want to spent a couple more
sentences saying what union and ~T types are, since most people are
going to care about that a lot more than they care about the low-level
detail that there's a new token.

For #47694.

Change-Id: Ib84f096ef6346a711801268ce362b64fa423d3f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/369734
Trust: Austin Clements <austin@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-06 19:50:32 +00:00
Austin Clements
2cb9042dc2 doc/go1.18: cite CLs for more efficient scavenging
For #47694.

Change-Id: Ic6088b1811600670a57f28426f4158a7c7517c82
Reviewed-on: https://go-review.googlesource.com/c/go/+/369616
Trust: Austin Clements <austin@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2021-12-06 17:34:53 +00:00
Robert Findley
f8a8a73096 go/types, types2: unexport NewTypeList
NewTypeList was not part of the go/types API proposal, and was left in
by accident. It also shouldn't be necessary, so remove it.

Updates #47916

Change-Id: I4db3ccf036ccfb708ecf2c176ea4921fe68089a4
Reviewed-on: https://go-review.googlesource.com/c/go/+/369475
Trust: Robert Findley <rfindley@google.com>
Run-TryBot: Robert Findley <rfindley@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-12-06 14:58:33 +00:00
Ian Lance Taylor
3396878af4 doc/go1.18: use correct link for reflect.PointerTo
For #47694

Change-Id: Iee4fda069a56ea4436b8aa32e2605f3349d7c154
Reviewed-on: https://go-review.googlesource.com/c/go/+/369334
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
2021-12-04 17:16:07 +00:00
Jeremy Faller
1876b38263 doc/go1.18: add docs for SysProcAttr.Pdeathsig
CL 355570

Updates #47694

Change-Id: I922cda28ca4cf1ae6d5e4f457cc66d5041b0e3e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/368798
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2021-12-04 11:59:35 +00:00
Robert Griesemer
549cfefc72 doc/go1.18: expand section on generics
Also, move it up in the document.

Updates #47694

Change-Id: I927c4c845089a5c22e2c5b5f3de1831c04c6d990
Reviewed-on: https://go-review.googlesource.com/c/go/+/369102
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-04 04:50:55 +00:00
Robert Griesemer
cd5f2cf50f doc/go1.18: add documentation for changes to go/types
The number of involved CLs is too large (hundreds) so
no CLs are mentioned in (html) comments.

Updates #47694

Change-Id: I655d800a1e56a71e9d70a190f1c42c17baf6861e
Reviewed-on: https://go-review.googlesource.com/c/go/+/369099
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-12-04 04:41:31 +00:00
Robert Griesemer
fa88ba1e8a doc/go1.18: add documentation for changes to go/ast
Updates #47694

Change-Id: Ied26f6345df2c8640d4be5132a05db3897b59009
Reviewed-on: https://go-review.googlesource.com/c/go/+/369096
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-12-04 01:07:28 +00:00
Robert Griesemer
821bf04f2a doc/go1.18: add documentation for changes to go/token
Updates #47694

Change-Id: I232fb20b3a77409b84c15f9ec1586e480f0f6390
Reviewed-on: https://go-review.googlesource.com/c/go/+/369095
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-12-04 01:07:21 +00:00
Robert Griesemer
ba83aa7caa doc/go1.18: add documentation for changes to go/constant
Updates #47694

Change-Id: I2ce5aaa4493259790712a8a49e5b03472c8a7400
Reviewed-on: https://go-review.googlesource.com/c/go/+/369094
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Robert Findley <rfindley@google.com>
2021-12-04 01:07:10 +00:00
Hossein Zolfi
d20a0bfc8a doc/go1.18: change github.com/golang/go/issues to golang.org/issue
Updates #47694

Change-Id: I84547ff995e2a302cf229fefefd28a7220a17028
Reviewed-on: https://go-review.googlesource.com/c/go/+/369016
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Trust: Austin Clements <austin@google.com>
2021-12-03 21:25:05 +00:00
Austin Clements
ebe99189fc doc/go1.18: catch up with runtime/compiler commits and API changes
For #47694.

Change-Id: I21b1af1807d4da2fb2f4d9b961d44a21d715d7d2
Reviewed-on: https://go-review.googlesource.com/c/go/+/369155
Trust: Austin Clements <austin@google.com>
Trust: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-12-03 21:23:09 +00:00
Katie Hockman
deb988a286 doc/go1.18: mention fuzzing in the release notes
Also make a few small formatting fixes.

Change-Id: Iad99d030312393af3b6533f2cd00f09aea0f2a7d
Reviewed-on: https://go-review.googlesource.com/c/go/+/369074
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-12-03 18:09:19 +00:00
Austin Clements
d921bb21df doc/go1.18: reorganize runtime/compiler a little
For #47694.

Change-Id: Iedf85f522f7c79ae0a61b4fc1f2f092cf7b613df
Reviewed-on: https://go-review.googlesource.com/c/go/+/368696
Trust: Austin Clements <austin@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-12-03 17:13:03 +00:00
Ian Lance Taylor
8835343280 doc/go1.18: mention new -asan option
For #44853
For #47694

Change-Id: Ia76246218b1361d8bdf510bbfc5178c83cdd3eec
Reviewed-on: https://go-review.googlesource.com/c/go/+/368834
Trust: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-12-02 23:02:33 +00:00
Jeremy Faller
06dbf6121a doc/go1.18: remove some TODOs for changes we aren't mentioning
Updates #47694

Change-Id: I8fdbded4aaf974425ee317a1cdd940a5ac88c0b3
Reviewed-on: https://go-review.googlesource.com/c/go/+/368794
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-02 22:06:27 +00:00
Jeremy Faller
48e4284e55 doc/go1.18: add docs on FieldByIndexErr
From:
https://go-review.googlesource.com/c/go/+/357962/

Updates #47694

Change-Id: I2d43dcbd28c03457b55eada26e87f7710a113b0c
Reviewed-on: https://go-review.googlesource.com/c/go/+/368364
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-02 22:06:10 +00:00
Jeremy Faller
e533b5793f doc/go1.18: add docs on new reflect.Value methods
From:

https://go-review.googlesource.com/c/go/+/352131/

Updates #47694

Change-Id: I7c7811c49900049f5ef7fc906fe25d2ffd73c7b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/368363
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Fabio Falzoi <fabio.falzoi84@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2021-12-02 22:05:56 +00:00
Jeremy Faller
f9b2733e3a doc/go1.18: add docs on MapIter.Reset
From:

https://go-review.googlesource.com/c/go/+/321891

Updates #47694

Change-Id: I2cdd5d9f3da62a5690cd2ef921ed48957c602d64
Reviewed-on: https://go-review.googlesource.com/c/go/+/368360
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-02 22:05:01 +00:00
Jeremy Faller
bcb98f126b doc/go1.18: add docs on User.GroupIds
Cobbled up some release notes from:

https://go-review.googlesource.com/c/go/+/330753/

Updates #47694

Change-Id: I249e4b96b7d51185b07c11a734505677e9e36315
Reviewed-on: https://go-review.googlesource.com/c/go/+/368358
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Kirill Kolyshkin <kolyshkin@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
2021-12-02 22:04:50 +00:00
Jeremy Faller
c8c89d20ce doc/go1.18: add docs on Cookie.Valid
Updates #47694

Change-Id: Ibf3e25fbccf82e4abd7bd76b2ea6ceb4b05d4664
Reviewed-on: https://go-review.googlesource.com/c/go/+/368357
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
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2021-12-02 22:04:23 +00:00
Jeremy Faller
25f06cb71f doc/go1.18: add deprecation note for net.Error.Temporary
Updates #47694

Change-Id: Ia25ad49f688efa3d60d83290095648711704b478
Reviewed-on: https://go-review.googlesource.com/c/go/+/368316
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-02 22:03:54 +00:00
Jeremy Faller
94e22fa03e doc/go1.18: add Conn.NetConn documentation to crypto/tls section
Updates #47694

Change-Id: Iead44baa8b2a06ecf7b92d343ed9117f0fc0793e
Reviewed-on: https://go-review.googlesource.com/c/go/+/368315
Trust: Jeremy Faller <jeremy@golang.org>
Trust: Katie Hockman <katie@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Katie Hockman <katie@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Agniva De Sarker <agniva.quicksilver@gmail.com>
2021-12-02 22:03:34 +00:00
Jeremy Faller
d3bf627bc1 doc/go1.18: add constraints package documentation
Updates #47694

Change-Id: I3239023dad194c317e271e6093eff2cfbed1a4b9
Reviewed-on: https://go-review.googlesource.com/c/go/+/368314
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-12-02 22:03:11 +00:00
Jeremy Faller
d514411625 doc/go1.18: add information on new pacer.
This is based off Michael's notes.

Updates #47694

Change-Id: I6e7944f85b776e8481829a2fafd177a49557c6ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/368156
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
2021-12-02 22:02:54 +00:00
Jeremy Faller
3c6295d272 doc/go1.18: add short-circuit evaluation for text/template
This description is based on https://golang.org/cl/321490.

Updates #47694

Change-Id: I48656cd487d2fccf0b0d3390f350f1bc6f2b0080
Reviewed-on: https://go-review.googlesource.com/c/go/+/365738
Trust: Jeremy Faller <jeremy@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2021-12-02 20:45:47 +00:00
Cherry Mui
c3a7fb2074 doc/go1.18: mention stack trace change
For #47694.

Change-Id: I06cac88d5328c8c0e38212ad801d70bc36cdfc6f
Reviewed-on: https://go-review.googlesource.com/c/go/+/368234
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Austin Clements <austin@google.com>
2021-12-01 22:20:39 +00:00
Robert Griesemer
61ff501968 spec: adjust section on package unsafe for type parameters
Change-Id: I562d4648756e710020ee491f3801896563a89baa
Reviewed-on: https://go-review.googlesource.com/c/go/+/367395
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-29 19:24:41 +00:00
Robert Griesemer
68da368a4e spec: rules for index expressions, len, cap, with type parameter types
We want to support some special cases for index expressions, len, and
cap on operands of type parameters (such as indexing a value constrained
by byte slices and strings), hence the extra rules.

Change-Id: I4a07dc7e64bb47361b021d606c52eae1784d5430
Reviewed-on: https://go-review.googlesource.com/c/go/+/366814
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Dan Scales <danscales@google.com>
2021-11-29 19:24:34 +00:00
Robert Griesemer
37a5d720d4 spec: corrections to various sections
- fix definition of "specific types" and add more examples
- state that a parameterized function must be instantiated
  when used as a function value
- remove duplicate word ("can can" -> "can")

Thanks to @danscales for finding these.

Change-Id: Ideb41efc35a3e67694d3bc97e462454feae37c44
Reviewed-on: https://go-review.googlesource.com/c/go/+/367394
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-11-29 19:24:26 +00:00
Jason A. Donenfeld
a59ab29bf2 doc/go1.18: use <code> instead of <pre> for target specification
For #47694.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Change-Id: I38c2fd9b57fbbacf220a2bc679f67e2dfdcc7cb1
Reviewed-on: https://go-review.googlesource.com/c/go/+/367514
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2021-11-29 16:08:23 +00:00
syumai
0fa53e41f1 spec: fix link for instantiations
This change corrects the link `Instantiantions` to `Instantiations` in the spec.

Change-Id: Ib0ed03420ae401d20af1ea723c5487018b2f462d
GitHub-Last-Rev: b84316c818
GitHub-Pull-Request: golang/go#49816
Reviewed-on: https://go-review.googlesource.com/c/go/+/367274
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
2021-11-27 23:29:50 +00:00
Carlo Alberto Ferraris
a142d6587c doc: go1.18 release notes for CLs 323318/332771
Updates #47694

Change-Id: Ib76737996a701906117e096eb6d05b388576a874
GitHub-Last-Rev: 05b9649965
GitHub-Pull-Request: golang/go#49588
Reviewed-on: https://go-review.googlesource.com/c/go/+/363840
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Daniel Martí <mvdan@mvdan.cc>
2021-11-27 19:49:32 +00:00
Jason A. Donenfeld
77038044ca doc/go1.18: document non-cooperative preemption on windows/arm{,64}
For #47694.
Updates #49759.

Change-Id: I7accd81b8ea6c31e4a2b5e155cf93fe9c447813b
Reviewed-on: https://go-review.googlesource.com/c/go/+/367095
Trust: Jason A. Donenfeld <Jason@zx2c4.com>
Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
2021-11-26 13:18:11 +00:00
jiahua wang
5527d7ff79 doc/go1.18: add Clone doc
For #47694

Change-Id: I3b135f6ff199d7a9746726b131fbe7dd97a8e95e
Reviewed-on: https://go-review.googlesource.com/c/go/+/364254
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Heschi Kreinick <heschi@google.com>
2021-11-24 21:08:29 +00:00
Robert Griesemer
696515ee39 spec: type assertions and switches don't operate on type parameters
Change-Id: I11111b3617673be94508128489aed6488d518537
Reviewed-on: https://go-review.googlesource.com/c/go/+/366834
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-24 20:54:12 +00:00
Robert Griesemer
6ea17aa52c spec: adjust type identity rules for type parameters
Change-Id: I5ffc7f26236487070447eaa0f6b14d1fab44c3c7
Reviewed-on: https://go-review.googlesource.com/c/go/+/366794
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-24 20:54:07 +00:00
Robert Griesemer
a3b8f627c2 spec: add section on instantiation
Change-Id: I2770da87b4c977b51dfa046f2f08283917675e1c
Reviewed-on: https://go-review.googlesource.com/c/go/+/365916
Trust: Robert Griesemer <gri@golang.org>
Trust: Dan Scales <danscales@google.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-11-24 20:53:54 +00:00
Robert Griesemer
ce2a20af46 spec: adjust conversion rules for type parameters
Change-Id: I7bfddf4be0d1d95419f312bb349ae2e16b74b795
Reviewed-on: https://go-review.googlesource.com/c/go/+/365915
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-24 20:53:51 +00:00
Robert Griesemer
939480033a spec: adjust assignability rules for type parameters
Change-Id: I3c4d8bdb5e92ee7fdca9593fb043f94f467755e8
Reviewed-on: https://go-review.googlesource.com/c/go/+/365434
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-24 20:53:45 +00:00
Robert Griesemer
003e7faf53 spec: adjust representability rules for type parameters
Change-Id: I4423a059527066c4418c195911f8184dfd3f5a15
Reviewed-on: https://go-review.googlesource.com/c/go/+/365914
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-24 20:53:29 +00:00
Robert Griesemer
5d8c49a5a1 spec: add definition of "specific types" of an interface
The notion of specific types will be used to define rules for
assignability, convertability, etc. when type parameters are
involved.

Change-Id: Ic5c134261e2a9fe05cdf25efd342f052458ab5c8
Reviewed-on: https://go-review.googlesource.com/c/go/+/366754
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-24 20:51:25 +00:00
Dmitri Shuralyov
e883005d2a doc/go1.18: document that iOS 12 or newer is required
For #47694.
Updates #49616.
Updates #48076.

Change-Id: I570564c3a54d3cd9cfc9b8267df9fbee3363b650
Reviewed-on: https://go-review.googlesource.com/c/go/+/366914
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-11-24 18:59:20 +00:00
Robert Griesemer
0244343088 spec: fix Swap example (correctly swap type arguments and parameters)
Thanks to @danscales for noticing the mistake.

Change-Id: I547ee80a78419765b82d39d7b34dc8d3bf962c35
Reviewed-on: https://go-review.googlesource.com/c/go/+/366215
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dan Scales <danscales@google.com>
2021-11-22 23:00:32 +00:00
Robert Griesemer
7456b94853 doc/go1.18: document new overflow error for some untyped arguments to print/ln
Fixes #49216.
For #47694.

Change-Id: Ib129d790c382ddcc9677d87db4ca827b7159856a
Reviewed-on: https://go-review.googlesource.com/c/go/+/366275
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-22 22:36:03 +00:00
Robert Griesemer
7fbe2f4cc8 doc/go1.18: document compiler change for "declared but not used" errors
Fixes #49214.
For #47694.

Change-Id: Iba68ed17bfd81890309b6a6732087f87a03e1350
Reviewed-on: https://go-review.googlesource.com/c/go/+/366274
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-22 22:35:57 +00:00
Robert Griesemer
e30ebaab0b spec: add section on the structure of interfaces
This change introduces the notion of a structural interface
and its corresponding structural type.

Change-Id: Ib5442dfd04cb5950b4467428cae51849f8922272
Reviewed-on: https://go-review.googlesource.com/c/go/+/365474
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-22 04:27:29 +00:00
Robert Griesemer
a287c4aa38 spec: add type parameter types
- add section on type parameters
- added two sections on the scope of type parameters
- expanded general section on types accordingly
- introduced the notion of a named type which will
  help in simplifying various rules (subsequent CLs)

Change-Id: I49c1ed7d6d4f951d751f0a3ca5dfb637e49829f2
Reviewed-on: https://go-review.googlesource.com/c/go/+/365414
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-22 03:24:07 +00:00
Robert Griesemer
0c3b4a358a spec: add type parameter lists
Change-Id: I29e9188a0fa1326c2755a9b86aeb47feaa8019be
Reviewed-on: https://go-review.googlesource.com/c/go/+/365274
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-22 03:24:01 +00:00
Cherry Mui
ba9f0f6665 doc/go1.18: mention register ABI on ARM64 and PPC64
For #47694.

Change-Id: Ide378f4a34587027c3d84fed2126c5b9bd8f7287
Reviewed-on: https://go-review.googlesource.com/c/go/+/363694
Trust: Cherry Mui <cherryyz@google.com>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
2021-11-19 21:41:33 +00:00
Jeremy Faller
aec5c2eed6 [go] doc: document speedups to Trim[|Left|Right]
CL: #332771

Updates: #47694
Change-Id: I8c729084b7a8745ec73f87ef3c469edbd596ddb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/365318
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Joe Tsai <joetsai@digital-static.net>
2021-11-19 21:36:24 +00:00
Jeremy Faller
0f75a9ecdf [go] doc: add new bufio functionality
cl/345570
cl/345569

Updates: #47694
Change-Id: I170af16d5fc9f022d3d29ed0772cfc3d02b8bbcf
Reviewed-on: https://go-review.googlesource.com/c/go/+/365317
Trust: Jeremy Faller <jeremy@golang.org>
Run-TryBot: Jeremy Faller <jeremy@golang.org>
Reviewed-by: Joe Tsai <joetsai@digital-static.net>
2021-11-19 21:36:17 +00:00
Robert Griesemer
24898d6948 spec: various clarifications/fixes for method sets and interfaces
- fixed a typo in the method set section
- express in the syntax that ~T denotes an underlying type
- be more precise when talking about types vs type terms
- refer to "unions" rather than "union expressions"
- make it clear in the spec title that this is WIP

Change-Id: I9b2c4b1f77bc50dd574ed6893bedd40529c320fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/365154
Trust: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-18 20:11:45 +00:00
Robert Griesemer
f6647f2e3b spec: generalize method sets and interface types to type sets
This is the first of several CLs that update the existing
Go 1.17 spec for type parameters.

This CL updates the section on method sets and interface types.
It also adds "any", "comparable" to the list of predeclared
identifiers.

Change-Id: I0ce25dc02791c33150c0d949528512610faf3eab
Reviewed-on: https://go-review.googlesource.com/c/go/+/362999
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-18 06:05:29 +00:00
Keith Randall
febbef593e doc: mention generics in release notes
Also mention local types restriction.

We probably want to say more at some point, this is just a
placeholder to start.

Update #47631

Change-Id: I828e451e1e8504d21cb55c7132e9cb330b160a54
Reviewed-on: https://go-review.googlesource.com/c/go/+/364134
Trust: Keith Randall <khr@golang.org>
Reviewed-by: Robert Griesemer <gri@golang.org>
2021-11-16 06:31:54 +00:00
jiahua wang
865689571d doc/go1.18: add AppendRune doc
For #47694

Change-Id: I39594c273aeb038702457587ee1c46e4b3920bb6
Reviewed-on: https://go-review.googlesource.com/c/go/+/363359
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Jeremy Faller <jeremy@golang.org>
Trust: Jeremy Faller <jeremy@golang.org>
2021-11-16 05:36:07 +00:00
Keith Randall
dfa62c79de doc: document GOAMD64 environment variable
Update #47694

Change-Id: I9c90bd251616cd4d10434bd3b6e6c30c5c819e24
Reviewed-on: https://go-review.googlesource.com/c/go/+/363661
Trust: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-14 16:54:11 +00:00
Robert Griesemer
d60a4e69f1 spec: fix a broken link
Thanks for jtagcat@ for finding this.

Change-Id: If7324808edbae19ec8bf503b04e0426f3fb3b47a
Reviewed-on: https://go-review.googlesource.com/c/go/+/363394
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-11 19:44:13 +00:00
Neil Alexander
666fc173c0 doc/go1.18: document http.Transport.Dial* being used in js/wasm
This PR adds a note into the Go 1.18 changelog for CL 330852.

Updates #46923.

Change-Id: I99150e9275ce23fcf3697d6a22ac216818223c74
GitHub-Last-Rev: b2772ce68b
GitHub-Pull-Request: golang/go#49258
Reviewed-on: https://go-review.googlesource.com/c/go/+/360297
Trust: Roland Shoemaker <roland@golang.org>
Reviewed-by: Dmitri Shuralyov <dmitshur@golang.org>
2021-11-11 16:17:21 +00:00
Bryan C. Mills
47b3ab5ede doc/go1.18: add a release note for 'go mod vendor -o'
For #47327

Change-Id: I50418c0d017c4e90a2c13d26945ee639079e4e33
Reviewed-on: https://go-review.googlesource.com/c/go/+/363174
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Paschalis Tsilias <paschalistsilias@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-11 14:57:18 +00:00
Robert Griesemer
17980dff36 doc: make a copy of the latest Go 1.17 spec
This will allow us to compare the changes made for Go 1.18.

Change-Id: I1456270b201967f5cb05e66cec556939e6e33265
Reviewed-on: https://go-review.googlesource.com/c/go/+/362894
Trust: Robert Griesemer <gri@golang.org>
Run-TryBot: Robert Griesemer <gri@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2021-11-10 05:08:25 +00:00
smasher164
ab31dbc05b doc/go1.18: strings,bytes: deprecate Title
Updates #48367.

Change-Id: Ib8fc6d9dd7c3c6a70fefe077615f51a71d9c42ed
Reviewed-on: https://go-review.googlesource.com/c/go/+/361899
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Dmitri Shuralyov <dmitshur@golang.org>
2021-11-08 14:49:56 +00:00
Dmitri Shuralyov
ba79c1e241 doc/go1.18: split bytes and strings packages
A small touchup after CL 361894.

For #47694.

Change-Id: Ifc161516f897f727195d21351a3c8eda7b6e327e
Reviewed-on: https://go-review.googlesource.com/c/go/+/361895
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Run-TryBot: Carlos Amedee <carlos@golang.org>
2021-11-05 22:54:47 +00:00
Dmitri Shuralyov
f00b43f28c doc/go1.18: fill in Go 1.18 release note TODOs using relnote
For #47694.

Change-Id: Ia80a1859bd0fc6f08d27293f519c22fd9a804fd2
Reviewed-on: https://go-review.googlesource.com/c/go/+/361894
Trust: Dmitri Shuralyov <dmitshur@golang.org>
Trust: Carlos Amedee <carlos@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
2021-11-05 22:00:37 +00:00
Bryan C. Mills
1f9dce749d cmd/go: download fewer dependencies in 'go mod download'
In modules that specify 'go 1.17' or higher, the go.mod file
explicitly requires modules for all packages transitively imported by
the main module. Users tend to use 'go mod download' to prepare for
testing the main module itself, so we should only download those
relevant modules.

In 'go 1.16' and earlier modules, we continue to download all modules
in the module graph (because we cannot in general tell which ones are
relevant without loading the full package import graph).

'go mod download all' continues to download every module in
'go list all', as it did before.

Fixes #44435

Change-Id: I3f286c0e2549d6688b3832ff116e6cd77a19401c
Reviewed-on: https://go-review.googlesource.com/c/go/+/357310
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Michael Matloob <matloob@golang.org>
2021-11-04 20:42:35 +00:00
Brad Fitzpatrick
2157498dfe doc/go1.18: remove some redundancy from netip docs
Change-Id: I593862331add3366f6b337844588568301746b80
Reviewed-on: https://go-review.googlesource.com/c/go/+/360608
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Trust: Josh Bleecher Snyder <josharian@gmail.com>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
2021-11-02 22:20:40 +00:00
Brad Fitzpatrick
c1ea3395a6 doc/go1.18: add net/netip
Updates #46518

Change-Id: Iefc2fec93becc7b36ba2b933ae79f7c9424317fc
Reviewed-on: https://go-review.googlesource.com/c/go/+/360634
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Brad Fitzpatrick <bradfitz@golang.org>
2021-11-02 06:20:21 +00:00
Bryan C. Mills
a88575d662 Revert "cmd/go: remove support for -buildmode=shared"
This reverts CL 359096.

Updates #47788.

Reason for revert: -buildmode=shared may have actually been working in a few very specific cases. We should not remove -buildmode=shared until we have implemented an alternative to support those few cases.

Change-Id: Ia962b06abacc11f6f29fc29d092773be175e32f1
Reviewed-on: https://go-review.googlesource.com/c/go/+/359575
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
2021-10-29 17:32:24 +00:00
Mark Pulford
749f6e9eb6 doc/go1.18: document Fossil/Bazaar and commit time build tag support
Change-Id: I032791a3cda1916099b0fd2955dcca4e69763660
Reviewed-on: https://go-review.googlesource.com/c/go/+/357958
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-10-27 21:37:54 +00:00
Bryan C. Mills
68bd5121ee cmd/go: remove support for -buildmode=shared
It never worked in module mode (or with a read-only GOROOT).
A proposal to drop it was filed (and approved) in
https://golang.org/issue/47788.

Fixes #47788

Change-Id: I0c12f38eb0c5dfe9384fbdb49ed202301fa4273d
Reviewed-on: https://go-review.googlesource.com/c/go/+/359096
Trust: Bryan C. Mills <bcmills@google.com>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
2021-10-27 20:03:17 +00:00
gosoon
0ec1b62ee2 doc/go1.18.html: fix a typo
gofmt -> <code>gofmt</code>

Change-Id: Idc01b01d8eb185f5e378000d11d622935b14db6e
GitHub-Last-Rev: 8d55dc7b86
GitHub-Pull-Request: golang/go#49084
Reviewed-on: https://go-review.googlesource.com/c/go/+/357251
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Trust: Daniel Martí <mvdan@mvdan.cc>
2021-10-26 00:38:52 +00:00
Cuong Manh Le
6c200017bf doc: document new reflect.UnsafePointer function
Updates #40592

Change-Id: If66629e47ca9859128ee3ad8fb584e022d7a6982
Reviewed-on: https://go-review.googlesource.com/c/go/+/356255
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Run-TryBot: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Keith Randall <khr@golang.org>
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2021-10-23 06:31:02 +00:00
Jay Conrod
85cbdda5a6 doc/go1.18: add release notes for build and VCS info
Fixes #37475
For #39301

Change-Id: I765bc667004931ff8973b947f2e95624a4a0375d
Reviewed-on: https://go-review.googlesource.com/c/go/+/356013
Reviewed-by: Bryan C. Mills <bcmills@google.com>
Trust: Jay Conrod <jayconrod@google.com>
2021-10-15 20:29:48 +00:00
Keith Randall
22951fbc89 cmd/compile: make for loops with range statements not terminating
Fixes #49003

Change-Id: If09c6f028dce5440b1be238612653ffdd626113a
Reviewed-on: https://go-review.googlesource.com/c/go/+/356189
Trust: Keith Randall <khr@golang.org>
Reviewed-by: roger peppe <rogpeppe@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
2021-10-15 19:54:44 +00:00
Keith Randall
81484cf626 doc: document new reflect.SetIter{Key,Value} functions
Update #48294
Update #47694

Change-Id: I4d4c01be74a9736d89a4ec92318ce29ff7289a0d
Reviewed-on: https://go-review.googlesource.com/c/go/+/356050
Trust: Keith Randall <khr@golang.org>
Reviewed-by: Joe Tsai <joetsai@digital-static.net>
2021-10-15 05:20:52 +00:00
Yuval Pavel Zholkover
f2141a71c6 doc/go1.18: document FreeBSD 11.x will no longer be supported
Mention future versions will require the COMPAT_FREEBSD12 kernel option
set in the kernel.

For #47694.

Change-Id: Ia94c4f9dbb38c68025d3c1d12dd2e241a5480a6b
Reviewed-on: https://go-review.googlesource.com/c/go/+/354971
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
2021-10-11 15:43:15 +00:00
Jay Conrod
3a555977fc cmd/go: add release note for 'go get' changes
For #43684

Change-Id: I9ce47de82203ec87e7d3683f56e6c6d61ae255f5
Reviewed-on: https://go-review.googlesource.com/c/go/+/352151
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Run-TryBot: Jay Conrod <jayconrod@google.com>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
2021-09-28 17:19:19 +00:00
Daniel Martí
1ce6fd03b8 cmd/gofmt: format files in parallel
gofmt is pretty heavily CPU-bound, since parsing and formatting 1MiB
of Go code takes much longer than reading that amount of bytes from
disk. However, parsing and manipulating a large Go source file is very
difficult to parallelize, so we continue to process each file in its
own goroutine.

A Go module may contain a large number of Go source files, so we need
to bound the amount of work in flight. However, because the
distribution of sizes for Go source files varies widely — from tiny
doc.go files containing a single package comment all the way up to
massive API wrappers generated by automated tools — the amount of
time, work, and memory overhead needed to process each file also
varies. To account for this variability, we limit the in-flight work
by bytes of input rather than by number of files. That allows us to
make progress on many small files while we wait for work on a handful
of large files to complete.

The gofmt tool has a well-defined output format on stdout, which was
previously deterministic. We keep it deterministic by printing the
results of each file in order, using a lazily-synchronized io.Writer
(loosly inspired by Haskell's IO monad). After a file has been
formatted in memory, we keep it in memory (again, limited by the
corresponding number of input bytes) until the output for all previous
files has been flushed. This adds a bit of latency compared to
emitting the output in nondeterministic order, but a little extra
latency seems worth the cost to preserve output stability.

This change is based on Daniel Martí's work in CL 284139, but using a
weighted semaphore and ephemeral goroutines instead of a worker pool
and batches. Benchmark results are similar, and I find the concurrency
in this approach a bit easier to reason about.

In the batching-based approach, the batch size allows us to "look
ahead" to find large files and start processing them early. To keep
the CPUs saturated and prevent stragglers, we would need to tune the
batch size to be about the same as the largest input files. If the
batch size is set too high, a large batch of small files could turn
into a straggler, but if the batch size is set too low, the largest
files in the data set won't be started early enough and we'll end up
with a large-file straggler.

One possible alternative would be to sort by file size instead of
batching: identify all of the files to be processed, sort from largest
to smallest, and then process the largest files first so that the
"tail" of processing covers the smallest files. However, that approach
would still fail to saturate available CPU when disk latency is high,
would require buffering an arbitrary amount of metadata in order to
sort by size, and (perhaps most importantly!) would not allow the
`gofmt` binary to preserve the same (deterministic) output order that
it has today.

In contrast, with a semaphore we can produce the same deterministic
output as ever using only one tuning parameter: the memory footprint,
expressed as a rough lower bound on the amount of RAM available per
thread. While we're below the memory limit, we can run arbitrarily
many disk operations arbitrarily far ahead, and process the results of
those operations whenever they become avaliable. Then it's up to the
kernel (not us) to schedule the disk operations for throughput and
latency, and it's up to the runtime (not us) to schedule the
goroutines so that they complete quickly.

In practice, even a modest assumption of a few megabytes per thread
seems to provide a nice speedup, and it should scale reasonably even
to machines with vastly different ratios of CPU to disk. (In practice,
I expect that most 'gofmt' invocations will work with files on at most
one physical disk, so the CPU:disk ratio should vary more-or-less
directly with the thread count, whereas the CPU:memory ratio is
more-or-less independent of thread count.)

name \ time/op         baseline.txt  284139.txt    simplified.txt
GofmtGorootCmd           11.9s ± 2%     2.7s ± 3%       2.8s ± 5%

name \ user-time/op    baseline.txt  284139.txt    simplified.txt
GofmtGorootCmd           13.5s ± 2%    14.4s ± 1%      14.7s ± 1%

name \ sys-time/op     baseline.txt  284139.txt    simplified.txt
GofmtGorootCmd           465ms ± 8%    229ms ±28%      232ms ±31%

name \ peak-RSS-bytes  baseline.txt  284139.txt    simplified.txt
GofmtGorootCmd          77.7MB ± 4%  162.2MB ±10%    192.9MB ±15%

For #43566

Change-Id: I4ba251eb4d188a3bd1901039086be57f0b341910
Reviewed-on: https://go-review.googlesource.com/c/go/+/317975
Trust: Bryan C. Mills <bcmills@google.com>
Trust: Daniel Martí <mvdan@mvdan.cc>
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
2021-09-24 21:38:56 +00:00