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Contents
# encoding: utf-8
require 'y_support/core_ext/class'
class Object
# Assigns prescribed atrributes to the object and makes them accessible with
# getter (reader) methods. Raises NameError should any of the getters shadow /
# overwrite existing methods.
#
def set_attr_with_readers hash
hash.each_pair { |ß, value|
fail NameError, "Method \##{ß} already defined!" if methods.include? ß
set_attr_with_readers! ß => value
}
end
# Assigns prescribed atrributes to the object and makes them accessible with
# getter (reader) methods. Shadows / overwrites existing methods.
#
def set_attr_with_readers! hash
hash.each_pair { |symbol, value|
instance_variable_set "@#{symbol}", value
singleton_class.class_exec { attr_reader symbol }
}
end
# Constructs parametrized subclasses of the supplied classes and makes them
# available under specified getters. Expects a hash of pairs { reader_symbol:
# class }, and a hash of parameters, with which the class(es) is (are)
# parametrized. Raises NameError should any of the getters shadow / overwrite
# existing methods.
#
def param_class hash, with: (fail ArgumentError, "No parameters!")
hash.each { |ß, ç|
sub = ç.parametrize with
set_attr_with_readers( ß => sub )
}
return nil
end
# Constructs parametrized subclasses of the supplied classes and makes them
# available under specified getters. Expects a hash of pairs { reader_symbol:
# class }, and a hash of parameters, with which the class(es) is (are)
# parametrized. Shadows / overwrites existing methods.
#
def param_class! hash, with: (fail ArgumentError, "No parameters!")
hash.each { |ß, ç|
sub = ç.parametrize with
set_attr_with_readers!( ß => sub )
}
return nil
end
end
Version data entries
17 entries across 17 versions & 1 rubygems