errTagValueSpace  = errors.New("suspicious space in struct tag value")
	errTagSpace       = errors.New("key:\"value\" pairs not separated by spaces")
)

// validateStructTag parses the struct tag and returns an error if it is not
// in the canonical format, which is a space-separated list of key:"value"
// settings. The value may contain spaces.
func validateStructTag(tag string) error {

	// Determine and prepend leading space.
	i, j := 0, 0
	for j < len(src) && isSpace(src[j]) {
		if src[j] == '\n' {
			i = j + 1 // byte offset of last line in leading space
		}
		j++
	}
	var res []byte
	res = append(res, src[:i]...)

	// Determine and prepend indentation of first code line.
	// Spaces are ignored unless there are no tabs,
	// in which case spaces count as one tab.
	indent := 0

	// Determine and prepend leading space.
	i, j := 0, 0
	for j < len(src) && isSpace(src[j]) {
		if src[j] == '\n' {
			i = j + 1 // byte offset of last line in leading space
		}
		j++
	}
	var res []byte
	res = append(res, src[:i]...)

	// Determine and prepend indentation of first code line.
	// Spaces are ignored unless there are no tabs,
	// in which case spaces count as one tab.
	indent := 0

kind: RoleBinding
metadata:
  name: fluentd-gcp-scaler-binding
  namespace: kube-system
  labels:
    kubernetes.io/cluster-service: "true"
    addonmanager.kubernetes.io/mode: Reconcile
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: Role
  name: system:fluentd-gcp-scaler
subjects:
- kind: ServiceAccount
  name: fluentd-gcp-scaler

Marian Lobur <******@****.***> 1618829053 +0200

Klaus Post <******@****.***> 1717429554 -0700

Adrian Kuegel <******@****.***> 1648469008 -0700

		fmtc, w := utf8.DecodeRuneInString(format[i:])

		// Space processing.
		// In the rest of this comment "space" means spaces other than newline.
		// Newline in the format matches input of zero or more spaces and then newline or end-of-input.
		// Spaces in the format before the newline are collapsed into the newline.
		// Spaces in the format after the newline match zero or more spaces after the corresponding input newline.

# Test that #cgo LDFLAGS are properly quoted.
# The #cgo LDFLAGS below should pass a string with spaces to -L,
# as though searching a directory with a space in its name.
# It should not pass --nosuchoption to the external linker.

[!cgo] skip

go build

[!exec:gccgo] skip

# TODO: remove once gccgo on builder is updated
[GOOS:aix] [GOARCH:ppc64] skip

go build -compiler gccgo

-- go.mod --
module m
-- cgo.go --
package main

! exists $WORK/log.txt
? go build -x
exists $WORK/log.txt
rm $WORK/log.txt

# TODO(#41400, #43078): when CC is set explicitly, it should be allowed to
# contain spaces separating arguments, and it should be possible to quote
# arguments with spaces (including the path), as in CGO_CFLAGS and other
# variables. For now, this doesn't work.
[!GOOS:windows] env CC=$WORK/'program files'/gcc
[GOOS:windows] env CC=$WORK\'program files'\gcc.bat