return gover.IsLang(x)
}

// Lang returns the Go language version. For example, Lang("1.2.3") == "1.2".
func Lang(x string) string {
	return gover.Lang(x)
}

// IsPrerelease reports whether v denotes a Go prerelease version.
func IsPrerelease(x string) bool {
	return gover.Parse(x).Kind != ""
}

// Prev returns the Go major release immediately preceding v,

// The caller is assumed to have checked that ModIsValid(path, vers) is true.
func ModIsPrerelease(path, vers string) bool {
	if IsToolchain(path) {
		return IsPrerelease(vers)
	}
	return semver.Prerelease(vers) != ""
}

// ModMajorMinor returns the "major.minor" truncation of the version v,
// for use as a prefix in "@patch" queries.

                "installationPath": "${TextUtil.escapeString(localRoot.absolutePath)}/Program Files/Microsoft Visual Studio/2017/Community",
                "installationVersion": "15.3.26730.16",
                "isPrerelease": false,
                "displayName": "Visual Studio Community 2017",
                "description": "Free, fully-featured IDE for students, open-source and individual developers",

		v := list[i]
		if gover.Compare(v, need) < 0 {
			break
		}
		if gover.Lang(latest) == gover.Lang(v) {
			continue
		}
		newer := latest
		latest = v
		if newer != "" && !gover.IsPrerelease(newer) {
			// latest is the last patch release of Go 1.X, and we saw a non-prerelease of Go 1.(X+1),
			// so latest is the one we want.
			break
		}
	}
	if latest == "" {