diff mercurial/registrar.py @ 37222:54355c243042

templatefilters: allow declaration of input data type

Currently filters take an unwrapped value, which should have no hybrid magic
but actually it does because stringify() relies on it. The 'intype' allows
us to pre-process the magic by .e.g. evalstring() keeping filter functions
as simple as they are now.

stringify() is ported as an example. More follow.

--- a/mercurial/registrar.py	Mon Mar 19 20:39:06 2018 +0900
+++ b/mercurial/registrar.py	Sun Mar 18 15:14:58 2018 +0900
@@ -324,7 +324,7 @@
 
         templatefilter = registrar.templatefilter()
 
-        @templatefilter('myfilter')
+        @templatefilter('myfilter', intype=bytes)
         def myfilterfunc(text):
             '''Explanation of this template filter ....
             '''
@@ -332,6 +332,9 @@
 
     The first string argument is used also in online help.
 
+    Optional argument 'intype' defines the type of the input argument,
+    which should be (bytes, int, or None for any.)
+
     'templatefilter' instance in example above can be used to
     decorate multiple functions.
 
@@ -342,6 +345,9 @@
     Otherwise, explicit 'templatefilters.loadkeyword()' is needed.
     """
 
+    def _extrasetup(self, name, func, intype=None):
+        func._intype = intype
+
 class templatefunc(_templateregistrarbase):
     """Decorator to register template function