# HG changeset patch
# User Yuya Nishihara <y...@tcha.org>
# Date 1521289310 -32400
# Sat Mar 17 21:21:50 2018 +0900
# Node ID e4dcb782c79b3d7c286a398bc51646c244e0ce9e
# Parent e826fe7a08c73ed484bb09d7ea2b2093750cec27
templater: define interface for objects which act as iterator of mappings
diff --git a/mercurial/templateutil.py b/mercurial/templateutil.py
--- a/mercurial/templateutil.py
+++ b/mercurial/templateutil.py
@@ -38,6 +38,10 @@ class wrapped(object):
__metaclass__ = abc.ABCMeta
@abc.abstractmethod
+ def itermaps(self):
+ """Yield each template mapping"""
+
+ @abc.abstractmethod
def show(self, context, mapping):
"""Return a bytes or (possibly nested) generator of bytes representing
the underlying object
@@ -493,7 +497,7 @@ def _formatfiltererror(arg, filt):
def runmap(context, mapping, data):
darg, targ = data
d = evalrawexp(context, mapping, darg)
- if util.safehasattr(d, 'itermaps'):
+ if isinstance(d, wrapped):
diter = d.itermaps()
else:
try:
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