# HG changeset patch
# User Sean Farley <sean.michael.farley@gmail.com>
# Date 1395958887 18000
# Node ID 6eb55310fcbc1b6e72e26240c430a427bfd53f9c
# Parent  dd2e25e49862213c73b5ea3412aa1fa5d8c92bab
templater: raise error for unknown func

Previously, if a template '{foo()}' was given, the buildfunc would not be able
to match it and hit a code path that would not return so it would error out
later in the templater stating that NoneType was not iterable. This patch makes
sure that a proper error is raised so that the user can be informed.

Tests have been updated.

diff -r dd2e25e49862 -r 6eb55310fcbc mercurial/templater.py
--- a/mercurial/templater.py	Fri Mar 07 14:06:52 2014 -0500
+++ b/mercurial/templater.py	Thu Mar 27 17:21:27 2014 -0500
@@ -212,6 +212,7 @@
             raise error.ParseError(_("filter %s expects one argument") % n)
         f = context._filters[n]
         return (runfilter, (args[0][0], args[0][1], f))
+    raise error.ParseError(_("unknown function '%s'") % n)
 
 def date(context, mapping, args):
     if not (1 <= len(args) <= 2):
diff -r dd2e25e49862 -r 6eb55310fcbc tests/test-command-template.t
--- a/tests/test-command-template.t	Fri Mar 07 14:06:52 2014 -0500
+++ b/tests/test-command-template.t	Thu Mar 27 17:21:27 2014 -0500
@@ -1416,6 +1416,12 @@
   abort: template filter 'datefilter' is not compatible with keyword 'author'
   [255]
 
+Thrown an error if a template function doesn't exist
+
+  $ hg tip --template '{foo()}\n'
+  hg: parse error: unknown function 'foo'
+  [255]
+
   $ cd ..