Import of pkgsrc-2013Q2

2013-09-26 17:14:40 +02:00
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+This is an abstract role which provides an alternate constructor for creating
+objects using parameters passed in from a configuration file. The actual
+implementation of reading the configuration file is left to concrete subroles.
+
+It declares an attribute configfile and a class method new_with_config, and
+requires that concrete roles derived from it implement the class method
+get_config_from_file.
+
+Attributes specified directly as arguments to new_with_config supercede those
+in the configfile.