class Module
Public Instance Methods
delegate_key(*methods, to: nil, prefix: nil, private: nil)
click to toggle source
# File lib/delegate_key.rb, line 2 def delegate_key(*methods, to: nil, prefix: nil, private: nil) unless to raise ArgumentError, "Delegation needs a target. Supply a keyword argument 'to' (e.g. delegate_key :key, to: :hash)." end if prefix == true && /^[^a-z_]/.match?(to) raise ArgumentError, "Can only automatically set the delegation prefix when delegating to a method." end method_prefix = if prefix "#{prefix == true ? to : prefix}_" else "" end location = caller_locations(1, 1).first file, line = location.path, location.lineno method_names = methods.map do |method| method_def = [ "def #{method_prefix}#{method}", " #{to}.public_send(:[], #{method.inspect})", "end" ].join ";" module_eval(method_def, file, line) end private(*method_names) if private method_names end