go/src/cmd/compile/internal/types2/version.go

type goVersion …

// asGoVersion returns v as a goVersion (e.g., "go1.20.1" becomes "go1.20").
// If v is not a valid Go version, the result is the empty string.
func asGoVersion(v string) goVersion { … }

// isValid reports whether v is a valid Go version.
func (v goVersion) isValid() bool { … }

// cmp returns -1, 0, or +1 depending on whether x < y, x == y, or x > y,
// interpreted as Go versions.
func (x goVersion) cmp(y goVersion) int { … }

var go1_9 …

var go1_13 …

var go1_14 …

var go1_17 …

var go1_18 …

var go1_20 …

var go1_21 …

var go1_22 …

var go1_23 …

var go_current …

// allowVersion reports whether the current effective Go version
// (which may vary from one file to another) is allowed to use the
// feature version (want).
func (check *Checker) allowVersion(want goVersion) bool { … }

// verifyVersionf is like allowVersion but also accepts a format string and arguments
// which are used to report a version error if allowVersion returns false.
func (check *Checker) verifyVersionf(at poser, v goVersion, format string, args ...interface{ … }