Files in this directory are data for Go's API checker ("go tool api", in src/cmd/api).

Each file is a list of API features, one per line.

go1.txt (and similarly named files) are frozen once a version has been
shipped. Each file adds new lines but does not remove any.

except.txt lists features that may disappear without breaking true
compatibility.

Starting with go1.19.txt, each API feature line must end in "#nnnnn"

pkg iter, func Pull2[$0 interface{}, $1 interface{}](Seq2[$0, $1]) (func() ($0, $1, bool), func()) #61897
pkg iter, func Pull[$0 interface{}](Seq[$0]) (func() ($0, bool), func()) #61897
pkg iter, type Seq2[$0 interface{}, $1 interface{}] func(func($0, $1) bool) #61897

## Tools {#tools}

### Go command {#go-command}

pkg archive/tar, type FileInfoNames interface { Gname, IsDir, ModTime, Mode, Name, Size, Sys, Uname } #50102
pkg archive/tar, type FileInfoNames interface, Gname() (string, error) #50102
pkg archive/tar, type FileInfoNames interface, IsDir() bool #50102
pkg archive/tar, type FileInfoNames interface, ModTime() time.Time #50102
pkg archive/tar, type FileInfoNames interface, Mode() fs.FileMode #50102
pkg archive/tar, type FileInfoNames interface, Name() string #50102

pkg net, type Dialer struct, KeepAliveConfig KeepAliveConfig #62254
pkg net, type KeepAliveConfig struct #62254
pkg net, type KeepAliveConfig struct, Count int #62254
pkg net, type KeepAliveConfig struct, Enable bool #62254
pkg net, type KeepAliveConfig struct, Idle time.Duration #62254
pkg net, type KeepAliveConfig struct, Interval time.Duration #62254
pkg net, type ListenConfig struct, KeepAliveConfig KeepAliveConfig #62254

pkg net/http, type Cookie struct, Quoted bool #46443...

## Tools {#tools}

### Go command {#go-command}

Setting the `GOROOT_FINAL` environment variable no longer has an effect
([#62047](https://go.dev/issue/62047)).
Distributions that install the `go` command to a location other than
`$GOROOT/bin/go` should install a symlink instead of relocating
or copying the `go` binary.

### Vet {#vet}

The `go vet` subcommand now includes the

pkg crypto/x509, method (*CertPool) AddCertWithConstraint(*Certificate, func([]*Certificate) error) #57178
pkg crypto/x509, method (OID) Equal(OID) bool #60665
pkg crypto/x509, method (OID) EqualASN1OID(asn1.ObjectIdentifier) bool #60665
pkg crypto/x509, method (OID) String() string #60665
pkg crypto/x509, type Certificate struct, Policies []OID #60665
pkg crypto/x509, type OID struct #60665

pkg reflect, type Type interface, OverflowComplex(complex128) bool #60427
pkg reflect, type Type interface, OverflowFloat(float64) bool #60427
pkg reflect, type Type interface, OverflowInt(int64) bool #60427