added support for is*() methods for attributes (foo.bar now looks for foo->getBar() or foo->isBar())

CHANGELOG

@@ -13,6 +13,7 @@ Backward incompatibilities:
    (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)
 
+ * 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

doc/02-Twig-for-Template-Designers.markdown

@@ -90,6 +90,7 @@ If a variable or attribute does not exist you will get back a `null` value
 > * if not, and if `foo` is an object, check that `bar` is a valid method
 >   (even if `bar` is the constructor - use `__construct()` instead);
 > * if not, and if `foo` is an object, check that `getBar` is a valid method;
+> * if not, and if `foo` is an object, check that `isBar` is a valid method (as of Twig 0.9.9);
 > * if not, return a `null` value.
 >
 >`foo['bar']` on the other hand works mostly the same with the a small

lib/Twig/Template.php

@@ -152,6 +152,8 @@ abstract class Twig_Template implements Twig_TemplateInterface
             $method = $item;
         } elseif (isset(self::$cache[$class]['methods']['get'.$lcItem])) {
             $method = 'get'.$item;
+        } elseif (isset(self::$cache[$class]['methods']['is'.$lcItem])) {
+            $method = 'is'.$item;
         } elseif (isset(self::$cache[$class]['methods']['__call'])) {
             $method = $item;
         } else {