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module Hashie
module Extensions
module Mash
module DefineAccessors
def self.included(klass)
klass.class_eval do
mod = Ext.new
include mod
end
end
def self.extended(obj)
included(obj.singleton_class)
end
class Ext < Module
def initialize
mod = self
define_method(:method_missing) do |method_name, *args, &block|
key, suffix = method_name_and_suffix(method_name)
case suffix
when '='.freeze
mod.define_writer(key, method_name)
when '?'.freeze
mod.define_predicate(key, method_name)
when '!'.freeze
mod.define_initializing_reader(key, method_name)
when '_'.freeze
mod.define_underbang_reader(key, method_name)
else
mod.define_reader(key, method_name)
end
send(method_name, *args, &block)
end
end
def define_reader(key, method_name)
define_method(method_name) do |&block|
if key? method_name
self.[](method_name, &block)
else
self.[](key, &block)
end
end
end
def define_writer(key, method_name)
define_method(method_name) do |value = nil|
if key? method_name
self.[](method_name, &proc)
else
assign_property(key, value)
end
end
end
def define_predicate(key, method_name)
define_method(method_name) do
if key? method_name
self.[](method_name, &proc)
else
!!self[key]
end
end
end
def define_initializing_reader(key, method_name)
define_method(method_name) do
if key? method_name
self.[](method_name, &proc)
else
initializing_reader(key)
end
end
end
def define_underbang_reader(key, method_name)
define_method(method_name) do
if key? method_name
self.[](key, &proc)
else
underbang_reader(key)
end
end
end
end
end
end
end
end
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