CHANGES

Jinja2 Changelog
================

Version 2.3
-----------
(codename to be selected, release date will be February 9th 2010)

- fixes issue with code generator that causes unbound variables
  to be generated if set was used in if-blocks and other small
  identifier problems.
- include tags are now able to select between multiple templates
  and take the first that exists, if a list of templates is
  given.
- fixed a problem with having call blocks in outer scopes that
  have an argument that is also used as local variable in an
  inner frame (#360).
- greatly improved error message reporting (#339)
- implicit tuple expressions can no longer be totally empty.
  This change makes ``{% if %}...{% endif %}`` a syntax error
  now. (#364)
- added support for translator comments if extracted via babel.

Version 2.2.1
-------------
(bugfix release, released on September 14th 2009)

- fixes some smaller problems for Jinja2 on Jython.

Version 2.2
-----------
(codename Kong, released on September 13th 2009)

- Include statements can now be marked with ``ignore missing`` to skip
  non existing templates.
- Priority of `not` raised.  It's now possible to write `not foo in bar`
  as an alias to `foo not in bar` like in python.  Previously the grammar
  required parentheses (`not (foo in bar)`) which was odd.
- Fixed a bug that caused syntax errors when defining macros or using the
  `{% call %}` tag inside loops.
- Fixed a bug in the parser that made ``{{ foo[1, 2] }}`` impossible.
- Made it possible to refer to names from outer scopes in included templates
  that were unused in the callers frame (#327)
- Fixed a bug that caused internal errors if names where used as iteration
  variable and regular variable *after* the loop if that variable was unused
  *before* the loop.  (#331)
- Added support for optional `scoped` modifier to blocks.
- Added support for line-comments.
- Added the `meta` module.
- Renamed (undocumented) attribute "overlay" to "overlayed" on the
  environment because it was clashing with a method of the same name.
- speedup extension is now disabled by default.

Version 2.1.1
-------------
(Bugfix release)

- Fixed a translation error caused by looping over empty recursive loops.

Version 2.1
-----------
(codename Yasuzō, released on November 23rd 2008)

- fixed a bug with nested loops and the special loop variable.  Before the
  change an inner loop overwrote the loop variable from the outer one after
  iteration.

- fixed a bug with the i18n extension that caused the explicit pluralization
  block to look up the wrong variable.

- fixed a limitation in the lexer that made ``{{ foo.0.0 }}`` impossible.

- index based subscribing of variables with a constant value returns an
  undefined object now instead of raising an index error.  This was a bug
  caused by eager optimizing.

- the i18n extension looks up `foo.ugettext` now followed by `foo.gettext`
  if an translations object is installed.  This makes dealing with custom
  translations classes easier.

- fixed a confusing behavior with conditional extending.  loops were partially
  executed under some conditions even though they were not part of a visible
  area.

- added `sort` filter that works like `dictsort` but for arbitrary sequences.

- fixed a bug with empty statements in macros.

- implemented a bytecode cache system.  (:ref:`bytecode-cache`)

- the template context is now weakref-able

- inclusions and imports "with context" forward all variables now, not only
  the initial context.

- added a cycle helper called `cycler`.

- added a joining helper called `joiner`.

- added a `compile_expression` method to the environment that allows compiling
  of Jinja expressions into callable Python objects.

- fixed an escaping bug in urlize

Version 2.0
-----------
(codename jinjavitus, released on July 17th 2008)

- the subscribing of objects (looking up attributes and items) changed from
  slightly.  It's now possible to give attributes or items a higher priority
  by either using dot-notation lookup or the bracket syntax.  This also
  changed the AST slightly.  `Subscript` is gone and was replaced with
  :class:`~jinja2.nodes.Getitem` and :class:`~jinja2.nodes.Getattr`.

  For more information see :ref:`the implementation details <notes-on-subscriptions>`.

- added support for preprocessing and token stream filtering for extensions.
  This would allow extensions to allow simplified gettext calls in template
  data and something similar.

- added :meth:`jinja2.environment.TemplateStream.dump`.

- added missing support for implicit string literal concatenation.
  ``{{ "foo" "bar" }}`` is equivalent to ``{{ "foobar" }}``

- `else` is optional for conditional expressions.  If not given it evaluates
  to `false`.

- improved error reporting for undefined values by providing a position.

- `filesizeformat` filter uses decimal prefixes now per default and can be
  set to binary mode with the second parameter.

- fixed bug in finalizer

Version 2.0rc1
--------------
(no codename, released on June 9th 2008)

- first release of Jinja2