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text/template/parse: allow space after continue or break 

Trivial fix: We must skip space after either of these keywords
before we expect a closing delimiter.

Also delete the stutter-generating extra 'in' in the error message.
(See what I did there?)

Fixes #51670

Change-Id: If5415632c36eaac6699bdc0aa6ce18be956c9b53
Reviewed-on: https://go-review.googlesource.com/c/go/+/392615
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Daniel Martí <mvdan@mvdan.cc>
Trust: Daniel Martí <mvdan@mvdan.cc>
TryBot-Result: Gopher Robot <gobot@golang.org>
This commit is contained in:
Rob Pike 2022-03-15 10:21:08 +11:00
parent 15728ce950
commit 41a82aa9c3
2 changed files with 8 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
src/text/template/parse/parse.go
View File

@ -415,8 +415,8 @@ func (t *Tree) action() (n Node) {
// {{break}}
// Break keyword is past.
func (t *Tree) breakControl(pos Pos, line int) Node {
if token := t.next(); token.typ != itemRightDelim {
t.unexpected(token, "in {{break}}")
if token := t.nextNonSpace(); token.typ != itemRightDelim {
t.unexpected(token, "{{break}}")
}
if t.rangeDepth == 0 {
t.errorf("{{break}} outside {{range}}")
@ -428,8 +428,8 @@ func (t *Tree) breakControl(pos Pos, line int) Node {
// {{continue}}
// Continue keyword is past.
func (t *Tree) continueControl(pos Pos, line int) Node {
if token := t.next(); token.typ != itemRightDelim {
t.unexpected(token, "in {{continue}}")
if token := t.nextNonSpace(); token.typ != itemRightDelim {
t.unexpected(token, "{{continue}}")
}
if t.rangeDepth == 0 {
t.errorf("{{continue}} outside {{range}}")

4
src/text/template/parse/parse_test.go
View File

@ -260,6 +260,10 @@ var parseTests = []parseTest{
{"newline in pipeline", "{{\n\"x\"\n|\nprintf\n}}", noError, `{{"x" | printf}}`},
{"newline in comment", "{{/*\nhello\n*/}}", noError, ""},
{"newline in comment", "{{-\n/*\nhello\n*/\n-}}", noError, ""},
{"spaces around continue", "{{range .SI}}{{.}}{{ continue }}{{end}}", noError,
`{{range .SI}}{{.}}{{continue}}{{end}}`},
{"spaces around break", "{{range .SI}}{{.}}{{ break }}{{end}}", noError,
`{{range .SI}}{{.}}{{break}}{{end}}`},
// Errors.
{"unclosed action", "hello{{range", hasError, ""},