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# File 'lib/mandate/initializer_injector.rb', line 8
def self.extended(base)
class << base
def initialize_with(*attrs, **kwattrs, &block)
kwarg_capture_key = (kwattrs.find(-> { [] }) { |_name, value| value == KWARGS }).first
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
instance_variable_set("@#{kwarg_capture_key}", {}) if kwarg_capture_key
kwargs.each do |name, value|
if kwattrs.key?(name)
instance_variable_set("@#{name}", value)
elsif kwarg_capture_key
instance_variable_get("@#{kwarg_capture_key}")[name] = value
else
raise ArgumentError, "unknown keyword: #{name}"
end
end
kwattrs.each do |key, value|
next unless value == NO_DEFAULT
next if kwargs.key?(key)
raise ArgumentError, "Keyword argument was not specified: #{key}"
end
instance_eval(&block) if block
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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