text/template: Comment nodes not show in tree

[sergiuilie]

What version of Go are you using (go version)?

$ go version
go version go1.17 windows/amd64

Does this issue reproduce with the latest release?

Yes, this issue is present in go1.17

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
set GO111MODULE=
set GOARCH=amd64
set GOBIN=
set GOCACHE=C:\Users\SIlie\AppData\Local\go-build
set GOENV=C:\Users\SIlie\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=C:\Users\SIlie\go\pkg\mod
set GONOPROXY=
set GONOSUMDB=
set GOOS=windows
set GOPATH=C:\Users\SIlie\go
set GOPRIVATE=
set GOPROXY=https://proxy.golang.org,direct
set GOROOT=C:\Go
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLDIR=C:\Go\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.17
set GCCGO=gccgo
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=NUL
set CGO_CFLAGS=-g -O2
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-g -O2
set CGO_FFLAGS=-g -O2
set CGO_LDFLAGS=-g -O2
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=C:\Users\SIlie\AppData\Local\Temp\go-build1192418538=/tmp/go-build -gno-record-gcc-switches

What did you do?

Having a simple comment or a comment with white space trimmed from the preceding and the following text, I am running the template.ParseFiles for my HTML file which contains a comment and I am not able to see the comment node in the tree list, while debugging I observe that the parser doesn't analyze this node at all. It does not matter if the file contains other nodes or not at all, the result is the same.

https://play.golang.org/p/IplCn3fdLf_E

What did you expect to see?

The comment node is present in the tree.

What did you see instead?

Nothing, comment node is not present in the tree.

[seankhliao]

From https://pkg.go.dev/text/template#Template

The *parse.Tree field is exported only for use by html/template and should be treated as unexported by all other clients.

If you need comments, use text/template/parse and set the Mode

[sergiuilie]

Great! Thank you for your reply!