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# File 'lib/mandate/initializer_injector.rb', line 3
def self.extended(base)
class << base
def initialize_with(*attrs, **kwattrs)
if kwattrs.empty?
define_method :initialize do |*args|
unless args.length == attrs.length
raise ArgumentError, "wrong number of arguments (given #{args.length}, expected #{attrs.length})"
end
attrs.zip(args).each do |attr, arg|
instance_variable_set("@#{attr}", arg)
end
end
else
define_method :initialize do |*args, **kwargs|
unless args.length == attrs.length
raise ArgumentError, "wrong number of arguments (given #{args.length}, expected #{attrs.length})"
end
attrs.zip(args).each do |attr, arg|
instance_variable_set("@#{attr}", arg)
end
kwargs.each do |name, value|
raise ArgumentError, "unknown keyword: #{name}" unless kwattrs.key?(name)
instance_variable_set("@#{name}", value)
end
end
end
attrs.each do |attr|
define_method attr do
instance_variable_get("@#{attr}")
end
private attr
end
kwattrs.each do |attr, default|
define_method attr do
if instance_variable_defined?("@#{attr}")
instance_variable_get("@#{attr}")
else
default
end
end
private attr
end
end
end
end
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