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Contents
# frozen_string_literal: true
module PriceHubble
module Utils
# Generate bang variants of methods which use the +Decision+ flow control.
module Bangers
extend ActiveSupport::Concern
class_methods do
# Generate bang variants for the given methods.
# Be sure to use the +bangers+ class method AFTER all method
# definitions, otherwise it will raise errors about missing methods.
#
# @param methods [Array<Symbol>] the source method names
# @raise [NoMethodError] when a source method is not defined
# @raise [ArgumentError] when a source method does not accept arguments
#
# rubocop:disable Metrics/MethodLength because the method template
# is better inlined
def bangers(*methods)
methods.each do |meth|
raise NoMethodError, "#{self}##{meth} does not exit" \
unless instance_methods(false).include? meth
raise ArgumentError, "#{self}##{meth} does not accept arguments" \
if instance_method(meth).arity.zero?
class_eval <<-RUBY, __FILE__, __LINE__ + 1
def #{meth}!(*args)
if args.last.is_a? Hash
args.last.merge!(bang: true)
else
args.push({ bang: true })
end
#{meth}(*args)
end
RUBY
end
end
# rubocop:enable Metrics/MethodLength
end
end
end
end
Version data entries
15 entries across 15 versions & 1 rubygems