Inverted sections.

examples/inverted.mustache

+{{^f}}one{{/f}}, {{ two }}, {{^f}}three{{/f}}{{^t}}, four!{{/t}}
\ No newline at end of file

examples/inverted.py

+import pystache
+
+class Inverted(pystache.View):
+    template_path = 'examples'
+
+    def t(self):
+        return True
+
+    def f(self):
+        return False
+
+    def two(self):
+        return 'two'

pystache/template.py

@@ -49,7 +49,7 @@ class Template(object):
         """Compiles our section and tag regular expressions."""
         tags = { 'otag': re.escape(self.otag), 'ctag': re.escape(self.ctag) }
 
-        section = r"%(otag)s\#([^\}]*)%(ctag)s\s*(.+?)\s*%(otag)s/\1%(ctag)s"
+        section = r"%(otag)s[\#|^]([^\}]*)%(ctag)s\s*(.+?)\s*%(otag)s/\1%(ctag)s"
         self.section_re = re.compile(section % tags, re.M|re.S)
 
         tag = r"%(otag)s(#|=|&|!|>|\{)?(.+?)\1?%(ctag)s+"
@@ -70,12 +70,15 @@ class Template(object):
             if it and hasattr(it, '__call__'):
                 replacer = it(inner)
             elif it and not hasattr(it, '__iter__'):
+                if section[2] != '^':
                     replacer = inner
             elif it:
                 insides = []
                 for item in it:
                     insides.append(self.render(inner, item))
                 replacer = ''.join(insides)
+            elif not it and section[2] == '^':
+                replacer = inner
 
             template = template.replace(section, replacer)
 

tests/test_view.py

@@ -4,6 +4,7 @@ import pystache
 from examples.simple import Simple
 from examples.complex_view import ComplexView
 from examples.lambdas import Lambdas
+from examples.inverted import Inverted
 
 class TestView(unittest.TestCase):
     def test_basic(self):
@@ -75,6 +76,10 @@ class TestView(unittest.TestCase):
         view.template = '{{#sort}}zyxwvutsrqponmlkjihgfedcba{{/sort}}'
         self.assertEquals(view.render(), 'abcdefghijklmnopqrstuvwxyz')
 
+    def test_inverted(self):
+        view = Inverted()
+        self.assertEquals(view.render(), """one, two, three""")
+
 
 if __name__ == '__main__':
     unittest.main()