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# File 'lib/ex_aequo/base/simpleton.rb', line 7
def self.new(*a, **k, &b)
names = a + k.keys
defaults = names.zip(a.map(&None) + k.values)
values = defaults.to_h
Class.new do
attr_reader *names
attr_reader :__values__
def to_h = __values__
def deconstruct_keys(*) = __values__
def merge(**keys, &blk)
values = __values__.merge(keys, &blk)
self.class.new(**values)
end
private
define_method :initialize do |*args, **kwds, &block|
raise ArgumentError, "spurious positional arguments #{args[a.size..].inspect}" if args.size > a.size
spurious = kwds.keys - values.keys
raise ArgumentError, "spurious keyword arguments #{spurious.inspect}" unless spurious.empty?
args.each_with_index do |arg, idx|
values[a[idx]] = arg
end
@__values__ = values.merge(kwds)
__values__.each do |name, value|
raise ArgumentError, "missing undefaulted argument #{name}" if value == None
instance_variable_set "@#{name}", value
end
end
end
end
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