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* errors: add ErrUnsupportedAndy Pan2023-03-111-0/+15
| | | | | | | | | | | | | Fixes #41198 Change-Id: Ib33a11d0eb311f8e2b81de24d11df49e00b2fc81 Reviewed-on: https://go-review.googlesource.com/c/go/+/473935 Run-TryBot: Ian Lance Taylor <iant@google.com> Reviewed-by: Bryan Mills <bcmills@google.com> Run-TryBot: Andy Pan <panjf2000@gmail.com> Auto-Submit: Ian Lance Taylor <iant@google.com> Reviewed-by: Ian Lance Taylor <iant@google.com> TryBot-Result: Gopher Robot <gobot@golang.org>
* errors, fmt: add support for wrapping multiple errorsDamien Neil2022-09-291-14/+17
| | | | | | | | | | | | | | | | | | | | | | | An error which implements an "Unwrap() []error" method wraps all the non-nil errors in the returned []error. We replace the concept of the "error chain" inspected by errors.Is and errors.As with the "error tree". Is and As perform a pre-order, depth-first traversal of an error's tree. As returns the first matching result, if any. The new errors.Join function returns an error wrapping a list of errors. The fmt.Errorf function now supports multiple instances of the %w verb. For #53435. Change-Id: Ib7402e70b68e28af8f201d2b66bd8e87ccfb5283 Reviewed-on: https://go-review.googlesource.com/c/go/+/432898 Reviewed-by: Cherry Mui <cherryyz@google.com> Reviewed-by: Rob Pike <r@golang.org> Run-TryBot: Damien Neil <dneil@google.com> Reviewed-by: Joseph Tsai <joetsai@digital-static.net>
* all: update references to symbols moved from os to io/fsRuss Cox2020-10-201-6/+6
| | | | | | | | | | | | | | | | | | The old os references are still valid, but update our code to reflect best practices and get used to the new locations. Code compiled with the bootstrap toolchain (cmd/asm, cmd/dist, cmd/compile, debug/elf) must remain Go 1.4-compatible and is excluded. For #41190. Change-Id: I8f9526977867c10a221e2f392f78d7dec073f1bd Reviewed-on: https://go-review.googlesource.com/c/go/+/243907 Trust: Russ Cox <rsc@golang.org> Run-TryBot: Russ Cox <rsc@golang.org> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Rob Pike <r@golang.org>
* errors: fix wrong code in package docJonathan Amsterdam2019-09-041-4/+4
| | | | | | | | | | | | | | | You can't call Unwrap on the return value of fmt.Errorf, but you can pass the result to errors.Unwrap. Also, move the description of the Unwrap function up so the example makes sense. Fixes #34061. Change-Id: Ica07c44665c5e65deea4aa6a146fc543a5a0a99d Reviewed-on: https://go-review.googlesource.com/c/go/+/193298 Run-TryBot: Jonathan Amsterdam <jba@google.com> Reviewed-by: Katie Hockman <katie@golang.org>
* errors: improve docJonathan Amsterdam2019-08-061-0/+49
| | | | | | | | | | | | Explain wrapping and how to use Is and As in the package doc. Explain "chain" in Is and As. Updates #33364. Change-Id: Ic06362106dbd129e33dd47e63176ee5355492086 Reviewed-on: https://go-review.googlesource.com/c/go/+/188737 Reviewed-by: Rob Pike <r@golang.org>
* errors, fmt: revert rejected changes for Go 1.13Damien Neil2019-05-151-32/+2
| | | | | | | | | | | | | | | | | | | | | | | Reverts the following changes: https://go.googlesource.com/go/+/1f90d081391d4f5911960fd28d81d7ea5e554a8f https://go.googlesource.com/go/+/8bf18b56a47a98b9dd2fa03beb358312237a8c76 https://go.googlesource.com/go/+/5402854c3557f87fa2741a52ffc15dfb1ef333cc https://go.googlesource.com/go/+/37f84817247d3b8e687a701ccb0d6bc7ffe3cb78 https://go.googlesource.com/go/+/6be6f114e0d483a233101a67c9644cd72bd3ae7a Partially reverts the followinng change, removing the errors.Opaque function and the errors.Wrapper type definition: https://go.googlesource.com/go/+/62f5e8156ef56fa61e6af56f4ccc633bde1a9120 Updates documentation referencing the Wrapper type. Change-Id: Ia622883e39cafb06809853e3fd90b21441124534 Reviewed-on: https://go-review.googlesource.com/c/go/+/176997 Run-TryBot: Damien Neil <dneil@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Marcel van Lohuizen <mpvl@golang.org>
* fmt: make type of fmt.Errorf the same as that of errors.NewMarcel van Lohuizen2019-03-141-3/+18
| | | | | | | | | | | | | This applies only for cases where %w is not used. The purpose of this change is to reduce test failures where tests depend on these two being the same type, as they previously were. Change-Id: I2dd28b93fe1d59f3cfbb4eb0875d1fb8ee699746 Reviewed-on: https://go-review.googlesource.com/c/go/+/167402 Run-TryBot: Marcel van Lohuizen <mpvl@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com>
* errors: improve performance of NewMarcel van Lohuizen2019-03-141-1/+6
| | | | | | | | | | | | | | | | | | | | See Issue #29382 and Issue #30468. Improvements in this CL: name old time/op new time/op delta New-8 352ns ± 2% 225ns ± 5% -36.04% (p=0.008 n=5+5) Improvements together with moving to 1 uintptr: name old time/op new time/op delta New-8 475ns ± 3% 225ns ± 5% -52.59% (p=0.008 n=5+5) Change-Id: I9d69a14e5e10a6498767defb7d5f26ceedcf9ba5 Reviewed-on: https://go-review.googlesource.com/c/go/+/167401 Run-TryBot: Marcel van Lohuizen <mpvl@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com>
* errors: add Frame and Formatter/Printer interfacesMarcel van Lohuizen2019-02-271-2/+12
| | | | | | | | | | | | | errors.New now implements Formatter and includes Frame information that is reported when detail is requested. Partly implements proposal Issue #29934. Change-Id: Id76888d246d7d862595b5e92d517b9c03f23a7a6 Reviewed-on: https://go-review.googlesource.com/c/163557 Run-TryBot: Marcel van Lohuizen <mpvl@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Damien Neil <dneil@google.com>
* all: make copyright headers consistent with one space after periodBrad Fitzpatrick2016-03-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | This is a subset of https://golang.org/cl/20022 with only the copyright header lines, so the next CL will be smaller and more reviewable. Go policy has been single space after periods in comments for some time. The copyright header template at: https://golang.org/doc/contribute.html#copyright also uses a single space. Make them all consistent. Change-Id: Icc26c6b8495c3820da6b171ca96a74701b4a01b0 Reviewed-on: https://go-review.googlesource.com/20111 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Ian Lance Taylor <iant@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org>
* build: move package sources from src/pkg to srcRuss Cox2014-09-081-0/+20
Preparation was in CL 134570043. This CL contains only the effect of 'hg mv src/pkg/* src'. For more about the move, see golang.org/s/go14nopkg.
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