[go-nuts] net.InterfaceAddrs() error and returned addr slice
Hi! I have error from net.InterfaceAddrs() like route ip+net: no such network interface i think that error happened because i have docker running that creates/deletes interfaces in my system. My question is - does returned slice from InterfaceAddrs filed always, or in case of error in always nil? As i understand go uses netlink to get all interfaces and when tries to get address from interface that already gone, this error happened. In my case this error not fatal, i only need to know all local unicast addresses. So if some interface is gone - this is not fatal, but i need to get all available ip. So if this function not fills the slice , i need to use different method to get all addresses. Can you helps me? P.S. Error not easy to reproduce in my case, so i can't easy check does InterfaceAddrs slice filled in case of error. -- Vasiliy Tolstov, e-mail: v.tols...@selfip.ru -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CACaajQt6P%3DgsQ_%2B2mgsJ-%3Dayxv3Gh-AbkpF_J4N4o4wziK5K8w%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
[go-nuts] Re: Go documentation - how to determine what implements an interface?
bytes.Reader is what I was looking for, thanks all! Seems like if it this information can be generated, then it should probably be included in the main documentation? I don't know how anyone new to the language would ever work that out otherwise. I have vscode 1.33, which support guru (using .0.9.2 of the go tools), but I don't see the option for 'implements'. macos 10.12.4 go 1.12.5 Cheers Peter -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/a1b01c89-06e9-4998-8c74-505628c5ee08%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
Re: [go-nuts] Re: Go documentation - how to determine what implements an interface?
To summarize, there are three main concrete types in the standard library that provide ReadSeeker functionality: *os.File *bytes.Reader *strings.Reader On Wed, May 15, 2019 at 12:33 PM Sam Mortimer wrote: > > There is guru > (https://docs.google.com/document/d/1_Y9xCEMj5S-7rv2ooHpZNH15JgRT5iM742gJkw5LtmQ/edit) > but it's intended for editors not humans. I suppose that means perhaps you > could use one of the editors that uses guru ? > > Regards, > -Sam. > > src/io/io.go:#5381 is where io.ReadSeeker is defined: > > $ guru implements src/io/io.go:#5381 |grep gomaster/src |grep -v _test.go > |sort > gomaster/src/bytes/reader.go:18.6-18.11: is implemented by pointer type > *bytes.Reader > gomaster/src/cmd/compile/internal/gc/iimport.go:241.6-241.17: is implemented > by pointer type *cmd/compile/internal/gc.importReader > gomaster/src/cmd/go/internal/lockedfile/lockedfile.go:24.6-24.9: is > implemented by struct type cmd/go/internal/lockedfile.File > gomaster/src/cmd/go/internal/lockedfile/lockedfile.go:31.6-31.11: is > implemented by struct type cmd/go/internal/lockedfile.osFile > gomaster/src/cmd/go/internal/modfetch/codehost/vcs.go:450.6-450.17: is > implemented by struct type cmd/go/internal/modfetch/codehost.deleteCloser > gomaster/src/debug/elf/reader.go:13.6-13.16: is implemented by struct type > debug/elf.errorReader > gomaster/src/debug/elf/reader.go:37.6-37.25: is implemented by pointer type > *debug/elf.readSeekerFromReader > gomaster/src/go/internal/gcimporter/iimport.go:21.6-21.14: is implemented by > struct type go/internal/gcimporter.intReader > gomaster/src/internal/poll/fd_unix.go:18.6-18.7: is implemented by pointer > type *internal/poll.FD > gomaster/src/io/io.go:115.6-115.11: implements Seeker > gomaster/src/io/io.go:145.6-145.15: interface type ReadSeeker > gomaster/src/io/io.go:157.6-157.20: is implemented by interface type > ReadWriteSeeker > gomaster/src/io/io.go:461.6-461.18: is implemented by pointer type > *SectionReader > gomaster/src/io/io.go:77.6-77.11: implements Reader > gomaster/src/mime/multipart/formdata.go:160.6-160.9: is implemented by > interface type mime/multipart.File > gomaster/src/mime/multipart/formdata.go:169.6-169.22: is implemented by > struct type mime/multipart.sectionReadCloser > gomaster/src/net/http/fs.go:93.6-93.9: is implemented by interface type > net/http.File > gomaster/src/os/exec/exec.go:562.6-562.14: is implemented by struct type > os/exec.closeOnce > gomaster/src/os/types.go:16.6-16.9: is implemented by pointer type *os.File > gomaster/src/strings/reader.go:17.6-17.11: is implemented by pointer type > *strings.Reader > > > On Wednesday, May 15, 2019 at 7:56:17 AM UTC-7, White Hexagon wrote: >> >> I have another strange interface with the Go AWS SDK. The PutObject is >> expecting the data as an: io.ReadSeeker >> >> I imagine there is something implementing this in Go. But my question is >> how would a new user find this information? The go documentation for the >> API just tells me there is a Reader and a Seeker but not what might be >> implementing the interface. I imagine this is difficult to generate since >> there is no explicit keyword 'implements' but I also imagine it is >> documented somewhere? >> >> Cheers >> Peter >> go1.12.1 > > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/a4bdba7c-d79c-46e8-9cfc-302444de8262%40googlegroups.com. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CAGeFq%2Bn%2BBwhoc65Hm-outBfikd1Dom%2BB3-6DgRnQ3JKwuvORcA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
[go-nuts] Re: Go documentation - how to determine what implements an interface?
There is guru ( https://docs.google.com/document/d/1_Y9xCEMj5S-7rv2ooHpZNH15JgRT5iM742gJkw5LtmQ/edit) but it's intended for editors not humans. I suppose that means perhaps you could use one of the editors that uses guru ? Regards, -Sam. src/io/io.go:#5381 is where io.ReadSeeker is defined: $ guru implements src/io/io.go:#5381 |grep gomaster/src |grep -v _test.go |sort gomaster/src/bytes/reader.go:18.6-18.11: is implemented by pointer type *bytes.Reader gomaster/src/cmd/compile/internal/gc/iimport.go:241.6-241.17: is implemented by pointer type *cmd/compile/internal/gc.importReader gomaster/src/cmd/go/internal/lockedfile/lockedfile.go:24.6-24.9: is implemented by struct type cmd/go/internal/lockedfile.File gomaster/src/cmd/go/internal/lockedfile/lockedfile.go:31.6-31.11: is implemented by struct type cmd/go/internal/lockedfile.osFile gomaster/src/cmd/go/internal/modfetch/codehost/vcs.go:450.6-450.17: is implemented by struct type cmd/go/internal/modfetch/codehost.deleteCloser gomaster/src/debug/elf/reader.go:13.6-13.16: is implemented by struct type debug/elf.errorReader gomaster/src/debug/elf/reader.go:37.6-37.25: is implemented by pointer type *debug/elf.readSeekerFromReader gomaster/src/go/internal/gcimporter/iimport.go:21.6-21.14: is implemented by struct type go/internal/gcimporter.intReader gomaster/src/internal/poll/fd_unix.go:18.6-18.7: is implemented by pointer type *internal/poll.FD gomaster/src/io/io.go:115.6-115.11: implements Seeker gomaster/src/io/io.go:145.6-145.15: interface type ReadSeeker gomaster/src/io/io.go:157.6-157.20: is implemented by interface type ReadWriteSeeker gomaster/src/io/io.go:461.6-461.18: is implemented by pointer type *SectionReader gomaster/src/io/io.go:77.6-77.11: implements Reader gomaster/src/mime/multipart/formdata.go:160.6-160.9: is implemented by interface type mime/multipart.File gomaster/src/mime/multipart/formdata.go:169.6-169.22: is implemented by struct type mime/multipart.sectionReadCloser gomaster/src/net/http/fs.go:93.6-93.9: is implemented by interface type net/http.File gomaster/src/os/exec/exec.go:562.6-562.14: is implemented by struct type os/exec.closeOnce gomaster/src/os/types.go:16.6-16.9: is implemented by pointer type *os.File gomaster/src/strings/reader.go:17.6-17.11: is implemented by pointer type *strings.Reader On Wednesday, May 15, 2019 at 7:56:17 AM UTC-7, White Hexagon wrote: > > I have another strange interface with the Go AWS SDK. The PutObject is > expecting the data as an: io.ReadSeeker > > I imagine there is something implementing this in Go. But my question is > how would a new user find this information? The go documentation for the > API just tells me there is a Reader and a Seeker but not what might be > implementing the interface. I imagine this is difficult to generate since > there is no explicit keyword 'implements' but I also imagine it is > documented somewhere? > > Cheers > Peter > go1.12.1 > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/a4bdba7c-d79c-46e8-9cfc-302444de8262%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[go-nuts] Re: Go documentation - how to determine what implements an interface?
2019. május 15., szerda 16:56:17 UTC+2 időpontban White Hexagon a következőt írta: > > I have another strange interface with the Go AWS SDK. The PutObject is > expecting the data as an: io.ReadSeeker > > I imagine there is something implementing this in Go. But my question is > how would a new user find this information? The go documentation for the > API just tells me there is a Reader and a Seeker but not what might be > implementing the interface. I imagine this is difficult to generate since > there is no explicit keyword 'implements' but I also imagine it is > documented somewhere? > > Cheers > Peter > go1.12.1 > Just check the definition:https://golang.org/pkg/io/#ReadSeeker Anything that implements a proper Read and Seek method, also implements the io.ReadSeeker interface. -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/adbea23d-3150-4bed-a183-e8fcb8404d0c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[go-nuts] Go documentation - how to determine what implements an interface?
I have another strange interface with the Go AWS SDK. The PutObject is expecting the data as an: io.ReadSeeker I imagine there is something implementing this in Go. But my question is how would a new user find this information? The go documentation for the API just tells me there is a Reader and a Seeker but not what might be implementing the interface. I imagine this is difficult to generate since there is no explicit keyword 'implements' but I also imagine it is documented somewhere? Cheers Peter go1.12.1 -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/b332ec93-3c20-4128-bd4e-552d0daf0336%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[go-nuts] Re: x/mobile: Feature, add "-target=io/arm,ios/386" and "-nobitcode" to bind command
I ran this command: brew install go --*HEAD* Now Xcode compiles without an error and ENABLE_BITCODE=YES On Tuesday, May 14, 2019 at 9:18:12 PM UTC-7, Tristian Azuara wrote: > > Hi!, > > gomobile does not produce BITCODE enabled frameworks, (AFAIK) you have to > set the XCode `ENABLE_BITCODE` build setting to `NO`, `gomobile` (the > latest version) automatically adds the `-fembed-bitcode` as C flag, here > you can find a better explanation of it: > > * https://stackoverflow.com/a/34965178 > > On Tuesday, May 14, 2019 at 9:00:32 PM UTC-7, const...@topinvestor.app > wrote: >> >> When I compile with: >> gomobile bind -target=ios -tags="ios" -v mygomobileios >> >> >> and importing the generated Mygomobileios.framework >> >> I get an error: >> >> ld: >> '/mygo/src/mygomobileios/gomobileios_test/Mygomobileios.framework/Mygomobileios(go.o)' >> >> does not contain bitcode. You must rebuild it with bitcode enabled (Xcode >> setting ENABLE_BITCODE), obtain an updated library from the vendor, or >> disable bitcode for this target. for architecture arm64 >> >> clang: error: linker command failed with exit code 1 (use -v to see >> invocation) >> >> Which indicates the generated framework does not contain bitcode. >> >> Ho to get the bitcode generated? >> >> On Monday, April 1, 2019 at 9:30:23 AM UTC-7, Tristian Azuara wrote: >>> >>> Hi Elias, thank you for the quick reply, I see, you're correct it does >>> support the archs for ios, I had not tried it for ios, because the >>> documentation just mentions that you can specify specific instruction sets >>> when binding for android: >>> >>> $ gomobile bind --help >>> >>> >>> By default, -target=android builds shared libraries for all supported instruction sets (arm, arm64, 386, amd64). A subset of instruction sets can be selected by specifying target type with the architecture name. > E.g., -target=android/arm,android/386. > For -target ios, gomobile must be run on an OS X machine with Xcode installed. The generated Objective-C types can be prefixed with the > -prefix flag. >>> There's no mention that you can filter out instruction sets for iOS but >>> I just tested using it and it works!, thank you for pointing that out. >>> >>> Now, regarding the bitcode part basically, because it's added >>> automatically; any libraries that don't have BITCODE enabled don't link >>> properly, here's some sample output: >>> >>> GO111MODULE=off gomobile bind -v -target=ios/arm,ios/arm64,ios/amd64 >>> -tags=ios example.com/mobile >>> runtime/cgo >>> golang.org/x/mobile/internal/mobileinit >>> os/user >>> net >>> example.com/pycore >>> example.com/jscore >>> # example.com/pycore >>> ld: warning: ignoring file pycore/libpython-scriptengine.a, file was >>> built for archive which is not the architecture being linked (armv7): >>> pycore/libpython-scriptengine.a >>> ld: warning: object file (/Users/tristian/go/src/ >>> example.com/pycore/libpython-scriptengine-ios.a(python-scriptengine-ios.o)) >>> was built for newer iOS version (9.3) than being linked (7.0) >>> ld: '/Users/tristian/go/src/ >>> example.com/pycore/libpython-scriptengine-ios.a(python-scriptengine-ios.o)' >>> does not contain bitcode. You must rebuild it with bitcode enabled (Xcode >>> setting ENABLE_BITCODE), obtain an updated library from the vendor, or >>> disable bitcode for this target. for architecture armv7 >>> clang: error: linker command failed with exit code 1 (use -v to see >>> invocation) >>> # example.com/jscore >>> ld: warning: ignoring file jscore/libscriptengine-ios-x86_64.a, file was >>> built for archive which is not the architecture being linked (armv7): >>> jscore/libscriptengine-ios-x86_64.a >>> ld: warning: object file (/Users/tristian/go/src/ >>> example.com/jscore/libscriptengine-ios-arm.a(test_lib_for_ios.o)) was >>> built for newer iOS version (10.2) than being linked (7.0) >>> ld: '/Users/tristian/go/src/ >>> example.com/jscore/libscriptengine-ios-arm.a(test_lib_for_ios.o)' does >>> not contain bitcode. You must rebuild it with bitcode enabled (Xcode >>> setting ENABLE_BITCODE), obtain an updated library from the vendor, or >>> disable bitcode for this target. for architecture armv7 >>> clang: error: linker command failed with exit code 1 (use -v to see >>> invocation) >>> gomobile: darwin-arm: go build -tags ios ios -v -buildmode=c-archive -o >>> /var/folders/g1/v3hz1sm92nv7wbzpg3dx_h_hgp/T/gomobile-work-974051835/mobile-arm.a >>> >>> gobind failed: exit status 2 >>> >>> make: *** [Mobile.framework] Error 1 >>> >>> This would force us to recompile libpython-scriptengine-ios.a or any >>> other libraries that don't have bitcode support >>> >>> When I comment out -fembed-bitcode I no longer see that error. >>> >>> Best, Tristian >>> >>> On Monday, April 1, 2019 at 12:09:35 AM UTC-7, ma...@eliasnaur.com >>> wrote: Hi, The -target flag does support architecture
