| commit | e6ee26a03b79d0e8b658463bdb29349ca68e1460 | [log] [tgz] |
|---|---|---|
| author | Rob Pike <r@golang.org> | Tue Sep 08 14:58:12 2015 -0700 |
| committer | Rob Pike <r@golang.org> | Wed Sep 09 05:28:11 2015 +0000 |
| tree | 3c8ba47d66ba2ba5d9d00675a1fb67de8b4ebd08 | |
| parent | 49fb8cc10c2d61ebdf3829f42bba9bec7b0a7ff7 [diff] |
text/template: provide a way to trim leading and trailing space between actions
Borrowing a suggestion from the issue listed below, we modify the lexer to
trim spaces at the beginning (end) of a block of text if the action immediately
before (after) is marked with a minus sign. To avoid parsing/lexing ambiguity,
we require an ASCII space between the minus sign and the rest of the action.
Thus:
{{23 -}}
<
{{- 45}}
produces the output
23<45
All the work is done in the lexer. The modification is invisible to the parser
or any outside package (except I guess for noticing some gaps in the input
if one tracks error positions). Thus it slips in without worry in text/template
and html/template both.
Fixes long-requested issue #9969.
Change-Id: I3774be650bfa6370cb993d0899aa669c211de7b2
Reviewed-on: https://go-review.googlesource.com/14391
Reviewed-by: Andrew Gerrand <adg@golang.org>
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