Mercurial > public > mercurial-scm > hg-stable
diff mercurial/templatefilters.py @ 49505:c96ed4029fda
templates: add filter to reverse list
The filter supports only lists because for lists, it?s straightforward to
implement. Reversing text doesn?t seem very useful and is hard to implement.
Reversing the bytes would break multi-bytes encodings. Reversing the code
points would break characters consisting of multiple code points. Reversing
graphemes is non-trivial without using a library not included in the standard
library.
| author | Manuel Jacob <me@manueljacob.de> |
|---|---|
| date | Thu, 15 Sep 2022 01:48:38 +0200 |
| parents | d44e3c45f0e4 |
| children | 046b9cce5850 |
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--- a/mercurial/templatefilters.py Wed Sep 07 14:56:45 2022 -0400 +++ b/mercurial/templatefilters.py Thu Sep 15 01:48:38 2022 +0200 @@ -390,6 +390,14 @@ return stringutil.person(author) +@templatefilter(b'reverse') +def reverse(list_): + """List. Reverses the order of list items.""" + if isinstance(list_, list): + return templateutil.hybridlist(list_[::-1], name=b'item') + raise error.ParseError(_(b'not reversible')) + + @templatefilter(b'revescape', intype=bytes) def revescape(text): """Any text. Escapes all "special" characters, except @.