templatekw: add public function to wrap a dict by _hybrid object

mercurial/formatter.py

@@ -321,8 +321,8 b' class _templateconverter(object):'
         data = util.sortdict(_iteritems(data))
         def f():
             yield _plainconverter.formatdict(data, key, value, fmt, sep)
-        return templatekw._hybrid(f(), data, lambda k: {key: k, value: data[k]},
-                                  lambda d: fmt % (d[key], d[value]))
+        return templatekw.hybriddict(data, key=key, value=value, fmt=fmt,
+                                     gen=f())
     @staticmethod
     def formatlist(data, name, fmt, sep):
         '''build object that can be evaluated as either plain string or list'''

mercurial/templatekw.py

@@ -62,6 +62,11 b' class _hybrid(object):'
             raise AttributeError(name)
         return getattr(self._values, name)
 
+def hybriddict(data, key='key', value='value', fmt='%s=%s', gen=None):
+    """Wrap data to support both dict-like and string-like operations"""
+    return _hybrid(gen, data, lambda k: {key: k, value: data[k]},
+                   lambda d: fmt % (d[key], d[value]))
+
 def hybridlist(data, name, fmt='%s', gen=None):
     """Wrap data to support both list-like and string-like operations"""
     return _hybrid(gen, data, lambda x: {name: x}, lambda d: fmt % d[name])