* 0.9.9 (2010-11-28)

Backward incompatibilities:
 * the self special variable has been renamed to _self
 * the odd and even filters are now tests:
     {{ foo|odd }} must now be written {{ foo is odd }}
 * the "safe" filter has been renamed to "raw"
 * in Node classes,
        sub-nodes are now accessed via getNode() (instead of property access)
        attributes via getAttribute() (instead of array access)
 * the urlencode filter had been renamed to url_encode
 * the include tag now merges the passed variables with the current context by default
   (the old behavior is still possible by adding the "only" keyword)
 * moved Exceptions to Twig_Error_* (Twig_SyntaxError/Twig_RuntimeError are now Twig_Error_Syntax/Twig_Error_Runtime)
 * removed support for {{ 1 < i < 3 }} (use {{ i > 1 and i < 3 }} instead)

 * added file and line to Twig_Error_Runtime exceptions thrown from Twig_Template
 * changed trans tag to accept any variable for the plural count
 * fixed sandbox mode (__toString() method check was not enforced if called implicitly from complex statements)
 * added the ** (power) operator
 * changed the algorithm used for parsing expressions
 * added the spaceless tag
 * removed trim_blocks option
 * added support for is*() methods for attributes (foo.bar now looks for foo->getBar() or foo->isBar())
 * changed all exceptions to extend Twig_Error
 * fixed unary expressions ({{ not(1 or 0) }})
 * fixed child templates (with an extend tag) that uses one or more imports
 * added support for {{ 1 not in [2, 3] }} (more readable than the current {{ not (1 in [2, 3]) }})
 * escaping has been rewritten
 * the implementation of template inheritance has been rewritten
   (blocks can now be called individually and still work with inheritance)
 * fixed error handling for if tag when a syntax error occurs within a subparse process
 * added a way to implement custom logic for resolving token parsers given a tag name
 * fixed js escaper to be stricter (now uses a whilelist-based js escaper)
 * added the following filers: "constant", "trans", "replace", "json_encode"
 * added a "constant" test
 * fixed objects with __toString() not being autoescaped
 * fixed subscript expressions when calling __call() (methods now keep the case)
 * added "test" feature (accessible via the "is" operator)
 * removed the debug tag (should be done in an extension)
 * fixed trans tag when no vars are used in plural form
 * fixed race condition when writing template cache
 * added the special _charset variable to reference the current charset
 * added the special _context variable to reference the current context
 * renamed self to _self (to avoid conflict)
 * fixed Twig_Template::getAttribute() for protected properties

* 0.9.8 (2010-06-28)

Backward incompatibilities:
 * the trans tag plural count is now attached to the plural tag:
    old: `{% trans count %}...{% plural %}...{% endtrans %}`
    new: `{% trans %}...{% plural count %}...{% endtrans %}`

 * added a way to translate strings coming from a variable ({% trans var %})
 * fixed trans tag when used with the Escaper extension
 * fixed default cache umask
 * removed Twig_Template instances from the debug tag output
 * fixed objects with __isset() defined
 * fixed set tag when used with a capture
 * fixed type hinting for Twig_Environment::addFilter() method

* 0.9.7 (2010-06-12)

Backward incompatibilities:
 * changed 'as' to '=' for the set tag ({% set title as "Title" %} must now be {% set title = "Title" %})
 * removed the sandboxed attribute of the include tag (use the new sandbox tag instead)
 * refactored the Node system (if you have custom nodes, you will have to update them to use the new API)

 * added self as a special variable that refers to the current template (useful for importing macros from the current template)
 * added Twig_Template instance support to the include tag
 * added support for dynamic and conditional inheritance ({% extends some_var %} and {% extends standalone ? "minimum" : "base" %})
 * added a grammar sub-framework to ease the creation of custom tags
 * fixed the for tag for large arrays (some loop variables are now only available for arrays and objects that implement the Countable interface)
 * removed the Twig_Resource::resolveMissingFilter() method
 * fixed the filter tag which did not apply filtering to included files
 * added a bunch of unit tests
 * added a bunch of phpdoc
 * added a sandbox tag in the sandbox extension
 * changed the date filter to support any date format supported by DateTime
 * added strict_variable setting to throw an exception when an invalid variable is used in a template (disabled by default)
 * added the lexer, parser, and compiler as arguments to the Twig_Environment constructor
 * changed the cache option to only accepts an explicit path to a cache directory or false
 * added a way to add token parsers, filters, and visitors without creating an extension
 * added three interfaces: Twig_NodeInterface, Twig_TokenParserInterface, and Twig_FilterInterface
 * changed the generated code to match the new coding standards
 * fixed sandbox mode (__toString() method check was not enforced if called implicitly from a simple statement like {{ article }})
 * added an exception when a child template has a non-empty body (as it is always ignored when rendering)

* 0.9.6 (2010-05-12)

 * fixed variables defined outside a loop and for which the value changes in a for loop
 * fixed the test suite for PHP 5.2 and older versions of PHPUnit
 * added support for __call() in expression resolution
 * fixed node visiting for macros (macros are now visited by visitors as any other node)
 * fixed nested block definitions with a parent call (rarely useful but nonetheless supported now)
 * added the cycle filter
 * fixed the Lexer when mbstring.func_overload is used with an mbstring.internal_encoding different from ASCII
 * added a long-syntax for the set tag ({% set foo %}...{% endset %})
 * unit tests are now powered by PHPUnit
 * added support for gettext via the `i18n` extension
 * fixed twig_capitalize_string_filter() and fixed twig_length_filter() when used with UTF-8 values
 * added a more useful exception if an if tag is not closed properly
 * added support for escaping strategy in the autoescape tag
 * fixed lexer when a template has a big chunk of text between/in a block

* 0.9.5 (2010-01-20)

As for any new release, don't forget to remove all cached templates after

If you have defined custom filters, you MUST upgrade them for this release. To
upgrade, replace "array" with "new Twig_Filter_Function", and replace the
environment constant by the "needs_environment" option:

  // before
  'even'   => array('twig_is_even_filter', false),
  'escape' => array('twig_escape_filter', true),

  // after
  'even'   => new Twig_Filter_Function('twig_is_even_filter'),
  'escape' => new Twig_Filter_Function('twig_escape_filter', array('needs_environment' => true)),

If you have created NodeTransformer classes, you will need to upgrade them to
the new interface (please note that the interface is not yet considered

 * fixed list nodes that did not extend the Twig_NodeListInterface
 * added the "without loop" option to the for tag (it disables the generation of the loop variable)
 * refactored node transformers to node visitors
 * fixed automatic-escaping for blocks
 * added a way to specify variables to pass to an included template
 * changed the automatic-escaping rules to be more sensible and more configurable in custom filters (the documentation lists all the rules)
 * improved the filter system to allow object methods to be used as filters
 * changed the Array and String loaders to actually make use of the cache mechanism
 * included the default filter function definitions in the extension class files directly (Core, Escaper)
 * added the // operator (like the floor() PHP function)
 * added the .. operator (as a syntactic sugar for the range filter when the step is 1)
 * added the in operator (as a syntactic sugar for the in filter)
 * added the following filters in the Core extension: in, range
 * added support for arrays (same behavior as in PHP, a mix between lists and dictionaries, arrays and hashes)
 * enhanced some error messages to provide better feedback in case of parsing errors

* 0.9.4 (2009-12-02)

If you have custom loaders, you MUST upgrade them for this release: The
Twig_Loader base class has been removed, and the Twig_LoaderInterface has also
been changed (see the source code for more information or the documentation).

 * added support for DateTime instances for the date filter
 * fixed loop.last when the array only has one item
 * made it possible to insert newlines in tag and variable blocks
 * fixed a bug when a literal '\n' were present in a template text
 * fixed bug when the filename of a template contains */
 * refactored loaders

* 0.9.3 (2009-11-11)

This release is NOT backward compatible with the previous releases.

  The loaders do not take the cache and autoReload arguments anymore. Instead,
  the Twig_Environment class has two new options: cache and auto_reload.
  Upgrading your code means changing this kind of code:

      $loader = new Twig_Loader_Filesystem('/path/to/templates', '/path/to/compilation_cache', true);
      $twig = new Twig_Environment($loader);

  to something like this:

      $loader = new Twig_Loader_Filesystem('/path/to/templates');
      $twig = new Twig_Environment($loader, array(
        'cache' => '/path/to/compilation_cache',
        'auto_reload' => true,

 * deprecated the "items" filter as it is not needed anymore
 * made cache and auto_reload options of Twig_Environment instead of arguments of Twig_Loader
 * optimized template loading speed
 * removed output when an error occurs in a template and render() is used
 * made major speed improvements for loops (up to 300% on even the smallest loops)
 * added properties as part of the sandbox mode
 * added public properties support (obj.item can now be the item property on the obj object)
 * extended set tag to support expression as value ({% set foo as 'foo' ~ 'bar' %} )
 * fixed bug when \ was used in HTML

* 0.9.2 (2009-10-29)

 * made some speed optimizations
 * changed the cache extension to .php
 * added a js escaping strategy
 * added support for short block tag
 * changed the filter tag to allow chained filters
 * made lexer more flexible as you can now change the default delimiters
 * added set tag
 * changed default directory permission when cache dir does not exist (more secure)
 * added macro support
 * changed filters first optional argument to be a Twig_Environment instance instead of a Twig_Template instance
 * made Twig_Autoloader::autoload() a static method
 * avoid writing template file if an error occurs
 * added $ escaping when outputting raw strings
 * enhanced some error messages to ease debugging
 * fixed empty cache files when the template contains an error

* 0.9.1 (2009-10-14)

  * fixed a bug in PHP 5.2.6
  * fixed numbers with one than one decimal
  * added support for method calls with arguments ({{ foo.bar('a', 43) }})
  * made small speed optimizations
  * made minor tweaks to allow better extensibility and flexibility

* 0.9.0 (2009-10-12)

 * Initial release