class:        testClass(badName, goodName),
		},
		"generate-name": {
			class: func() *resource.ResourceClass {
				class := testClass(goodName, goodName)

			template:     testClaimTemplate(badName, goodNS, goodClaimSpec),
		},
		"missing-namespace": {
			wantFailures: field.ErrorList{field.Required(field.NewPath("metadata", "namespace"), "")},

                  - message: Hostname value must only contain valid characters (matching
                      ^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$)
                    rule: 'self.type == ''Hostname'' ? self.value.matches(r"""^(\*\.)?[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$"""):
                      true'
                maxItems: 16
                type: array

			claim:        testClaim(badName, goodNS, goodClaimSpec),
		},
		"missing-namespace": {
			wantFailures: field.ErrorList{field.Required(field.NewPath("metadata", "namespace"), "")},

	for _, ans := range rx.FindAllStringSubmatch(r, -1) {
		ns = append(ns, &NS{absDomainName(ans[2])})
	}
	return
}

func nslookupCNAME(name string) (cname string, err error) {
	var r string
	if r, err = nslookup("cname", name); err != nil {
		return
	}
	// mail.golang.com canonical name = golang.org.

var validCompilerFlags = []*lazyregexp.Regexp{
	re(`-D([A-Za-z_][A-Za-z0-9_]*)(=[^@\-]*)?`),
	re(`-U([A-Za-z_][A-Za-z0-9_]*)`),
	re(`-F([^@\-].*)`),
	re(`-I([^@\-].*)`),
	re(`-O`),
	re(`-O([^@\-].*)`),
	re(`-W`),
	re(`-W([^@,]+)`), // -Wall but not -Wa,-foo.
	re(`-Wa,-mbig-obj`),
	re(`-Wp,-D([A-Za-z_][A-Za-z0-9_]*)(=[^@,\-]*)?`),
	re(`-Wp,-U([A-Za-z_][A-Za-z0-9_]*)`),
	re(`-ansi`),
	re(`-f(no-)?asynchronous-unwind-tables`),

		$2 !~ /^ETH_/ &&
		$2 !~ /^EPROC_/ &&
		$2 !~ /^EQUIV_/ &&
		$2 !~ /^EXPR_/ &&
		$2 !~ /^EVIOC/ &&
		$2 ~ /^E[A-Z0-9_]+$/ ||
		$2 ~ /^B[0-9_]+$/ ||
		$2 ~ /^(OLD|NEW)DEV$/ ||
		$2 == "BOTHER" ||
		$2 ~ /^CI?BAUD(EX)?$/ ||
		$2 == "IBSHIFT" ||
		$2 ~ /^V[A-Z0-9]+$/ ||
		$2 ~ /^CS[A-Z0-9]/ ||
		$2 ~ /^I(SIG|CANON|CRNL|UCLC|EXTEN|MAXBEL|STRIP|UTF8)$/ ||
		$2 ~ /^IGN/ ||
		$2 ~ /^IX(ON|ANY|OFF)$/ ||

                    maxLength: 253
                    pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
                    type: string
                  kind:
                    description: kind is kind of the target resource.
                    maxLength: 63
                    minLength: 1
                    pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
                    type: string
                  name:

type addrDetail struct {
	IsV6   bool   // IPv4 is false, IPv6 is true.
	ZoneV6 string // != "" only if IsV6 is true.
}

// z0, z4, and z6noz are sentinel Addr.z values.
// See the Addr type's field docs.
var (
	z0    unique.Handle[addrDetail]
	z4    = unique.Make(addrDetail{})
	z6noz = unique.Make(addrDetail{IsV6: true})
)

                    maxLength: 253
                    pattern: ^$|^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$
                    type: string
                  kind:
                    description: kind is kind of the target resource.
                    maxLength: 63
                    minLength: 1
                    pattern: ^[a-zA-Z]([-a-zA-Z0-9]*[a-zA-Z0-9])?$
                    type: string
                  name: