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# File 'lib/attribute_cartographer.rb', line 12
def map *args
@mapper ||= {}
(from, to), (f1, f2) = args.partition { |a| !(Proc === a) }
passthrough = ->(v) { v }
f1 ||= passthrough
f2 ||= passthrough
if Array === from
if f1.arity == 1
from.each { |k| @mapper[k] = [k, f1] }
else
from.each { |k| @mapper[k] = f1 }
end
else
raise AttributeCartographer::InvalidArgumentError if to && f1.arity == 2
@mapper[from] = (f1.arity == 1 ? [to || from, f1] : f1)
@mapper[to] = [from, f2] if to && (f1 == f2 || f2 != passthrough)
end
end
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