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

changing-files: record merged files at commit time...

changing-files: record merged files at commit time The data is easy to gather at commit time, and we need it for changeset centric copy tracing. Right now, it is not persisted so we cannot use it. However we will fix this part very soon, gathering something to persist was necessary first. Differential Revision: https://phab.mercurial-scm.org/D9088

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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