upstream/mercurial-mirror Files · mercurial/thirdparty/attr/converters.py

py3: fix curses chunkselector fallback (when diffs are too large) on py3...

py3: fix curses chunkselector fallback (when diffs are too large) on py3 Previously we showed the message using Exception.message, which is removed in py3. Since crecordmod.fallbackerror inherits from error.Abort, we can just use `b'%s' % exception` to print the message. This does not print the hint, but that's fine - we don't set one. We inherit from error.Abort so that if a codepath doesn't handle fallback specially, it exits to the terminal with a sane message instead of an unknown exception error. Differential Revision: https://phab.mercurial-scm.org/D7912

Siddharth Agarwal - - Load All Authors

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      """

      Commonly useful converters.

      """

      from __future__ import absolute_import, division, print_function

      def optional(converter):

          """

          A converter that allows an attribute to be optional. An optional attribute

          is one which can be set to ``None``.

          :param callable converter: the converter that is used for non-``None``

              values.

          ..  versionadded:: 17.1.0

          """

          def optional_converter(val):

              if val is None:

                  return None

              return converter(val)

          return optional_converter

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				"""
				Commonly useful converters.
				"""

				from __future__ import absolute_import, division, print_function


				def optional(converter):
				"""
				A converter that allows an attribute to be optional. An optional attribute
				is one which can be set to ``None``.

				:param callable converter: the converter that is used for non-``None``
				values.

				.. versionadded:: 17.1.0
				"""

				def optional_converter(val):
				if val is None:
				return None
				return converter(val)

				return optional_converter