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(PͷΤϥʔελοΫτϨʔεͷྺ࢙ͱࠓޙ
(PͷΤϥʔϋϯυϦϯά࠷৽ࣄ-VODI-5
!TPOBUBSEͦͳଠגࣜձࣾ4UBDL
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(PͷΤϥʔτϨʔεͷྺ࢙
w IUUQTHJUIVCDPNQLHFSSPSTϦϦʔε
w ελοΫτϨʔεʹରԠ
w FSSPSXSBQͷελϯμʔυʹͳΔ
func main() {
if err := errorsA1(); err != nil {
fmt.Printf("main: %+v", errors.Cause(err))
}
}
func errorsA1() error {
err := errors.New("not found")
return errors.Wrap(err, "errorsA1")
}
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(PͷΤϥʔτϨʔεͷྺ࢙
w (PνʔϜ͔ΒطଘͷFSSPSʹ͍ͭͯͷఏى
w IUUQTHPHPPHMFTPVSDFDPNQSPQPTBMNBTUFSEFTJHOHPESBGUFSSPS
JOTQFDUJPONE
w IUUQTHJUIVCDPNHPMBOHHPJTTVFT
w IUUQTHJUIVCDPNHPMBOHHPJTTVFT
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(PͷΤϥʔτϨʔεͷྺ࢙
w 1SPQPTBMͰFSSPSͷXSBQͷఏҊͱ࣮ݧ༻ͷYFSSPST͕ϦϦʔε
w IUUQTQLHHPEFWHPMBOHPSHYYFSSPST
w XͰΤϥʔΛϥοϓ
w ΤϥʔτϨʔεʹରԠ
func main() {
if err := xerrorsA1(); err != nil {
fmt.Printf("main: %+v", err)
}
}
func xerrorsA1() error {
err := xerrors.New("not found")
return xerrors.Errorf(": %w", err)
}
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(PͷΤϥʔτϨʔεͷྺ࢙
w (PͷFSSPSTͰਖ਼ࣜʹXSBQʹରԠ
w GNU&SSPSGͱXͰϥοϓ͢Δ YFSSPSTFSSPST&SSPSGͱXͩͬͨ
w ͔͠͠ελοΫτϨʔεग़ྗ࠾༻͞Εͳ͔ͬͨ
w IUUQTHJUIVCDPNHPMBOHHPJTTVFTJTTVFDPNNFOU
w NFUIBOFϒϩά(PͷFSSPS͕ελοΫτϨʔεΛؚ·ͳ͍ཧ༝
w YFSSPSTͰɺελοΫτϨʔεग़ྗܧଓ
func main() {
if err := errorsA1(); err != nil {
fmt.Printf("main: %+v", err)
}
}
func errorsA1() error {
err := errors.New("not found")
return fmt.Errorf("invalid argument %w", err)
}
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(PͷΤϥʔτϨʔεͷྺ࢙
w QLHFSSPSTͷ(JU)VCϦϙδτϦ͕ΞʔΧΠϒ͞ΕΔ
w Ҡߦઌͷఆ൪͕ݟ͔ͭΒͳ͍ঢ়ଶ͕࢝·Δ
w ʹYFSSPTͷ&SSPSGɺ6OXSBQɺ"Tɺ*Tɺ͕EFQSFDBUFE
w YFSSPSTͷ6OXSBQɺ"Tɺ*T(PͷFSSPSTQBDLBHFͰସͰ͖ΔͨΊෆཁʹͳͬͨ
w FSSPSTQBDLBHFͷ&SSPSGτϨʔεػೳ͕ͳ͍ͨΊɺYFSSPSTͷ&SSPSGΛସͰ͖ͳ͍
ͨΊYFSPSSTͷҠߦ͕ഭΒΕΔঢ়گʹͳΔ
w ʹYFSSPST&SSPSGEFQSFDBUFEղআ
w /FXͱ&SSPSG͕ར༻Ͱ͖ΔͷͰɺYFSSPST͕ར༻Ͱ͖Δঢ়ଶʹͳͬͨ
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(PͷΤϥʔτϨʔεͷྺ࢙
w (PͰFSSPST+PJOͱGNU&SSPSGͷෳΤϥʔͷ8SBQαϙʔτ
w YFSSPST&SSPSGෳΤϥʔͷϥοϓΛαϙʔτ͍ͯ͠ͳ͍ͷͰɺඪ४ϥΠϒϥϦͱͷ
ػೳ͕ࠩੜ·Εͯ͠·ͬͨ
w FSSPST+PJOYFSSPSTͰ͑Δ
w ΤϥʔτϨʔε్͕ΕΔ͕͋Δ
func main() {
if err := errorsA1(); err != nil {
fmt.Printf("main: %+v", err)
}
}
func errorsA1() error {
err := errors.New("not found")
return fmt.Errorf("1: %w, 2: %w", err, err)
}
func errorsA1() error {
err := errors.New("not found")
return errors.Join(err, errors.New("invalid argument"))
}
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(PͷΤϥʔτϨʔεͷࠓޙ
w (0%(FSSTUBDLUSBDFؚ͕·Ε͍ͯΔͱ͖ʹFSSPSʹελοΫτϨʔ
εΛؚΉఏҊ
w IUUQTHJUIVCDPNHPMBOHHPJTTVFT
w (P4VSWFZ
w (Pͷ՝ͰτοϓλΠ
11%
11%
7%
6%
6%
8%
The type system
Tooling
Missing or immature libraries /
frameworks
Differences from more familiar
languages / ecosystems
Error handling / stack traces
Learning curve / best practices / docs
(open-ended text response)
What, if anything, is the biggest challenge you personally face using Go
today?
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(PͷΤϥʔτϨʔεͷࠓޙ
w ࠓޙͲ͏ͳΔͷ͔ʁ
w 4VSWFZͰ্ҐͳͷͰɺରԠ͞ΕΔ͜ͱΛظ͍ͨ͠
w ରԠ͢Δ·ͰͲ͏͢Ε͍͍ͷ͔ʁ
w QLHFSSPSTYFSSPSTͷ··͑Δ
w ۃྗӈԟࠨԟ͠ͳ͍
w ϓϩμΫτͰ͕ى͖͍ͯͳ͍ͳΒɺযͬͯҠߦ͠ͳ͍
w (PνʔϜΛظͯͭ͠
w ଞͷύοέʔδΛ࠾༻͢Δ
w త͕͋ΕదʹଞͷύοέʔδΛ࠾༻͢Δ
w ʮνʔϜͱͯ͠ΞʔΧΠϒ͞ΕͨQBDLBHFར༻͠ͳ͍ϧʔϧͳͷͰɺQLH
FSSPST͔ΒͷҠߦઌΛ୳͢ʯ
w ʮෳͷΤϥʔϥοϓΛ͍͍ͨͷͰɺYFSSPST͔ΒͷҠߦઌΛ୳͢ʯ
w ʮϥΠϒϥϦ"ͷ#ػೳΛ͏͔ΒҠߦ͢Δʯ
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(PͷΤϥʔτϨʔεͷࠓޙ
w ଞͷύοέʔδΛ࠾༻͢Δ
w IUUQTHJUIVCDPNDPDLSPBDIECFSSPST
w ϦονͳػೳΛ͍͍ͨ
w ΤϥʔҎ֎ͷՃใΛཧ͍ͨ͠ͳͲ
w IUUQTHJUIVCDPNHPFSSPSTFSSPST
w YFSSPST͍ͨ͘ͳ͍͕ɺඪ४ϥΠϒϥϦͷFSSPSTͱ͍ۙΠϯλʔϑΣʔεʹͨ͠
͍ɺFSSPST+PJOͰΤϥʔτϨʔεʹ͕͋Δ
w IUUQTDTPQFOTPVSDFHPPHMFHPYQLHTJUFNBTUFSJOUFSOBMEFSSPSTEFSSPSTHP
PSIUUQTHJUIVCDPNFBSUICPVOELJEFSSPSY
w EFGFSͰΤϥʔͷϥοϓΛ͍ͨ͠
w EFSSPSTFSSPSYγϯϓϧͳϥΠϒϥϦͳͷͰɺࢀߟʹಠࣗͰ࣮͢Δͷ͓͢͢
Ί
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(PͷΤϥʔτϨʔεͷࠓޙ
w QLHFSSPST
func main() {
if err := errorsA1(); err != nil {
fmt.Printf("main: %+v", errors.Cause(err))
}
}
func errorsA1() error {
err := errors.New("not found")
return errors.Wrap(err, "errorsA1")
}
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(PͷΤϥʔτϨʔεͷࠓޙ
w YFSSPST
func main() {
if err := xerrorsA1(); err != nil {
fmt.Printf("main: %+v", err)
}
}
func xerrorsA1() error {
err := xerrors.New("not found")
return xerrors.Errorf(": %w", err)
}
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(PͷΤϥʔτϨʔεͷࠓޙ
w DPDLSPBDIECFSSPST
func main() {
if err := errorsA1(); err != nil {
fmt.Printf("main: %+v", err)
}
}
func errorsA1() error {
err := errors.New("not found")
return errors.Wrap(err, "errorsA1")
}
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(PͷΤϥʔτϨʔεͷࠓޙ
w HPFSSPST
func main() {
if err := goerrorsA1(); err != nil {
fmt.Printf("main: %v",
err.(*errors.Error).ErrorStack())
}
}
func goerrorsA1() error {
err := errors.New("not found")
return errors.Wrap(err, 1)
}
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(PͷΤϥʔτϨʔεͷࠓޙ
w EFSSPST
func main() {
if err := derrorsA1(); err != nil {
var se *derrors.StackError
errors.As(err, &se)
fmt.Printf("main: %s", se.Stack)
}
}
func derrorsA1() (err error) {
defer derrors.WrapStack(&err, "error in A1")
return errors.New("not found")
}
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(PͷΤϥʔτϨʔεͷࠓޙ
w FSSPSY
func main() {
if err := errorxA1(); err != nil {
fmt.Printf("main: %v", err)
}
}
func errorxA1() (err error) {
defer errorx.Trace(&err)
return errors.New("not found")
}