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57 lines
2.2 KiB
Diff
57 lines
2.2 KiB
Diff
From 673accec311a027c22b0718d753f8da922915305 Mon Sep 17 00:00:00 2001
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From: Eli Bendersky <eliben@gmail.com>
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Date: Thu, 13 Jul 2017 20:25:29 -0700
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Subject: [PATCH] Address an import of pycparser in -OO mode.
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In this mode there are no docstrings; we don't want an instantiation of CParser
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to fail, though it won't actually work correctly if used.
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See #197 and #198
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---
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pycparser/plyparser.py | 21 +++++++++++++++++++--
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1 file changed, 19 insertions(+), 2 deletions(-)
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diff --git a/pycparser/plyparser.py b/pycparser/plyparser.py
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index af91922..b6640fa 100644
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--- a/pycparser/plyparser.py
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+++ b/pycparser/plyparser.py
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@@ -8,6 +8,7 @@
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# License: BSD
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#-----------------------------------------------------------------
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+import warnings
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class Coord(object):
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""" Coordinates of a syntactic element. Consists of:
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@@ -87,12 +88,28 @@ def template(cls):
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See `parameterized` for more information on parameterized rules.
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"""
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+ issued_nodoc_warning = False
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for attr_name in dir(cls):
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if attr_name.startswith('p_'):
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method = getattr(cls, attr_name)
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if hasattr(method, '_params'):
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- delattr(cls, attr_name) # Remove template method
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- _create_param_rules(cls, method)
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+ # Remove the template method
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+ delattr(cls, attr_name)
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+ # Create parameterized rules from this method; only run this if
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+ # the method has a docstring. This is to address an issue when
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+ # pycparser's users are installed in -OO mode which strips
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+ # docstrings away.
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+ # See: https://github.com/eliben/pycparser/pull/198/ and
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+ # https://github.com/eliben/pycparser/issues/197
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+ # for discussion.
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+ if method.__doc__ is not None:
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+ _create_param_rules(cls, method)
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+ elif not issued_nodoc_warning:
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+ warnings.warn(
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+ 'parsing methods must have __doc__ for pycparser to work properly',
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+ RuntimeWarning,
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+ stacklevel=2)
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+ issued_nodoc_warning = True
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return cls
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