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text/template/parse: fix handling of assignment/declaration in PipeNode.String

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The String method for Pipes assumed all variables were declared. Easy fix:
check the IsAssign bit.

Fixes #65382

Change-Id: I58f2760c1a8bb2821c3538645d893f58fd76ae73
Reviewed-on: https://go-review.googlesource.com/c/go/+/592695
Run-TryBot: Rob Pike <r@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Rob Pike <r@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
This commit is contained in:
Rob Pike 2024-06-14 09:48:09 +10:00 committed by Gopher Robot
parent d67839f58a
commit 6fea409424
2 changed files with 8 additions and 1 deletions
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6
src/text/template/parse/node.go
View File

@ -217,7 +217,11 @@ func (p *PipeNode) writeTo(sb *strings.Builder) {
}
v.writeTo(sb)
}
sb.WriteString(" := ")
if p.IsAssign {
sb.WriteString(" = ")
} else {
sb.WriteString(" := ")
}
}
for i, c := range p.Cmds {
if i > 0 {

3
src/text/template/parse/parse_test.go
View File

@ -306,6 +306,9 @@ var parseTests = []parseTest{
{"bug1a", "{{$x:=.}}{{$x!2}}", hasError, ""}, // ! is just illegal here.
{"bug1b", "{{$x:=.}}{{$x+2}}", hasError, ""}, // $x+2 should not parse as ($x) (+2).
{"bug1c", "{{$x:=.}}{{$x +2}}", noError, "{{$x := .}}{{$x +2}}"}, // It's OK with a space.
// Check the range handles assignment vs. declaration properly.
{"bug2a", "{{range $x := 0}}{{$x}}{{end}}", noError, "{{range $x := 0}}{{$x}}{{end}}"},
{"bug2b", "{{range $x = 0}}{{$x}}{{end}}", noError, "{{range $x = 0}}{{$x}}{{end}}"},
// dot following a literal value
{"dot after integer", "{{1.E}}", hasError, ""},
{"dot after float", "{{0.1.E}}", hasError, ""},