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# File 'lib/keyword_curry/keyword_argument_currying.rb', line 2
def curry(arity = arity)
required_keywords = parameters
.select { |param| param.first == :keyreq }
.map { |param| param.last }
if required_keywords.empty?
super
else
curried_proc = self
collected_positional_args = []
collected_keyword_args = {}
keyword_currier = Proc.new { |keywords|
curried_proc.call(keywords) unless keywords.is_a?(Hash)
collected_keyword_args.merge!(keywords)
outstanding_keywords = required_keywords - collected_keyword_args.keys
if outstanding_keywords.empty?
curried_proc.call(*collected_positional_args, collected_keyword_args)
else
keyword_currier
end
}
positional_argument_handler = Proc.new { |*args|
if arity == -1
keyword_args = args.last if args.last.is_a?(Hash)
if keyword_args
positional_args = args[0..-2]
else
positional_args = args
keyword_args = {}
end
else
positional_args = args.take(curried_proc.arity)
keyword_args = args[curried_proc.arity..-1].first || {}
end
collected_positional_args += positional_args
keyword_currier.call(keyword_args)
}
if arity == 0
keyword_currier
else
positional_argument_handler.curry(arity)
end
end
end
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