diff options
Diffstat (limited to 'vendor/golang.org/x/tools/internal/versions/gover.go')
-rw-r--r-- | vendor/golang.org/x/tools/internal/versions/gover.go | 172 |
1 files changed, 0 insertions, 172 deletions
diff --git a/vendor/golang.org/x/tools/internal/versions/gover.go b/vendor/golang.org/x/tools/internal/versions/gover.go deleted file mode 100644 index bbabcd2..0000000 --- a/vendor/golang.org/x/tools/internal/versions/gover.go +++ /dev/null @@ -1,172 +0,0 @@ -// Copyright 2023 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -// This is a fork of internal/gover for use by x/tools until -// go1.21 and earlier are no longer supported by x/tools. - -package versions - -import "strings" - -// A gover is a parsed Go gover: major[.Minor[.Patch]][kind[pre]] -// The numbers are the original decimal strings to avoid integer overflows -// and since there is very little actual math. (Probably overflow doesn't matter in practice, -// but at the time this code was written, there was an existing test that used -// go1.99999999999, which does not fit in an int on 32-bit platforms. -// The "big decimal" representation avoids the problem entirely.) -type gover struct { - major string // decimal - minor string // decimal or "" - patch string // decimal or "" - kind string // "", "alpha", "beta", "rc" - pre string // decimal or "" -} - -// compare returns -1, 0, or +1 depending on whether -// x < y, x == y, or x > y, interpreted as toolchain versions. -// The versions x and y must not begin with a "go" prefix: just "1.21" not "go1.21". -// Malformed versions compare less than well-formed versions and equal to each other. -// The language version "1.21" compares less than the release candidate and eventual releases "1.21rc1" and "1.21.0". -func compare(x, y string) int { - vx := parse(x) - vy := parse(y) - - if c := cmpInt(vx.major, vy.major); c != 0 { - return c - } - if c := cmpInt(vx.minor, vy.minor); c != 0 { - return c - } - if c := cmpInt(vx.patch, vy.patch); c != 0 { - return c - } - if c := strings.Compare(vx.kind, vy.kind); c != 0 { // "" < alpha < beta < rc - return c - } - if c := cmpInt(vx.pre, vy.pre); c != 0 { - return c - } - return 0 -} - -// lang returns the Go language version. For example, lang("1.2.3") == "1.2". -func lang(x string) string { - v := parse(x) - if v.minor == "" || v.major == "1" && v.minor == "0" { - return v.major - } - return v.major + "." + v.minor -} - -// isValid reports whether the version x is valid. -func isValid(x string) bool { - return parse(x) != gover{} -} - -// parse parses the Go version string x into a version. -// It returns the zero version if x is malformed. -func parse(x string) gover { - var v gover - - // Parse major version. - var ok bool - v.major, x, ok = cutInt(x) - if !ok { - return gover{} - } - if x == "" { - // Interpret "1" as "1.0.0". - v.minor = "0" - v.patch = "0" - return v - } - - // Parse . before minor version. - if x[0] != '.' { - return gover{} - } - - // Parse minor version. - v.minor, x, ok = cutInt(x[1:]) - if !ok { - return gover{} - } - if x == "" { - // Patch missing is same as "0" for older versions. - // Starting in Go 1.21, patch missing is different from explicit .0. - if cmpInt(v.minor, "21") < 0 { - v.patch = "0" - } - return v - } - - // Parse patch if present. - if x[0] == '.' { - v.patch, x, ok = cutInt(x[1:]) - if !ok || x != "" { - // Note that we are disallowing prereleases (alpha, beta, rc) for patch releases here (x != ""). - // Allowing them would be a bit confusing because we already have: - // 1.21 < 1.21rc1 - // But a prerelease of a patch would have the opposite effect: - // 1.21.3rc1 < 1.21.3 - // We've never needed them before, so let's not start now. - return gover{} - } - return v - } - - // Parse prerelease. - i := 0 - for i < len(x) && (x[i] < '0' || '9' < x[i]) { - if x[i] < 'a' || 'z' < x[i] { - return gover{} - } - i++ - } - if i == 0 { - return gover{} - } - v.kind, x = x[:i], x[i:] - if x == "" { - return v - } - v.pre, x, ok = cutInt(x) - if !ok || x != "" { - return gover{} - } - - return v -} - -// cutInt scans the leading decimal number at the start of x to an integer -// and returns that value and the rest of the string. -func cutInt(x string) (n, rest string, ok bool) { - i := 0 - for i < len(x) && '0' <= x[i] && x[i] <= '9' { - i++ - } - if i == 0 || x[0] == '0' && i != 1 { // no digits or unnecessary leading zero - return "", "", false - } - return x[:i], x[i:], true -} - -// cmpInt returns cmp.Compare(x, y) interpreting x and y as decimal numbers. -// (Copied from golang.org/x/mod/semver's compareInt.) -func cmpInt(x, y string) int { - if x == y { - return 0 - } - if len(x) < len(y) { - return -1 - } - if len(x) > len(y) { - return +1 - } - if x < y { - return -1 - } else { - return +1 - } -} |