diff options
Diffstat (limited to 'activesupport/lib/active_support/core_ext/module/attr_accessor_with_default.rb')
| -rw-r--r-- | activesupport/lib/active_support/core_ext/module/attr_accessor_with_default.rb | 27 |
1 files changed, 13 insertions, 14 deletions
diff --git a/activesupport/lib/active_support/core_ext/module/attr_accessor_with_default.rb b/activesupport/lib/active_support/core_ext/module/attr_accessor_with_default.rb index 28ac89dab9..e3259a0a84 100644 --- a/activesupport/lib/active_support/core_ext/module/attr_accessor_with_default.rb +++ b/activesupport/lib/active_support/core_ext/module/attr_accessor_with_default.rb @@ -2,30 +2,29 @@ class Module # Declare an attribute accessor with an initial default return value. # # To give attribute <tt>:age</tt> the initial value <tt>25</tt>: - # + # # class Person # attr_accessor_with_default :age, 25 # end # - # some_person.age - # => 25 - # some_person.age = 26 - # some_person.age - # => 26 + # person = Person.new + # person.age # => 25 + # + # person.age = 26 + # person.age # => 26 # # To give attribute <tt>:element_name</tt> a dynamic default value, evaluated # in scope of self: # - # attr_accessor_with_default(:element_name) { name.underscore } + # attr_accessor_with_default(:element_name) { name.underscore } # - def attr_accessor_with_default(sym, default = nil, &block) - raise 'Default value or block required' unless !default.nil? || block - define_method(sym, block_given? ? block : Proc.new { default }) + def attr_accessor_with_default(sym, default = Proc.new) + define_method(sym, block_given? ? default : Proc.new { default }) module_eval(<<-EVAL, __FILE__, __LINE__ + 1) - def #{sym}=(value) # def age=(value) - class << self; attr_reader :#{sym} end # class << self; attr_reader :age end - @#{sym} = value # @age = value - end # end + def #{sym}=(value) # def age=(value) + class << self; attr_accessor :#{sym} end # class << self; attr_accessor :age end + @#{sym} = value # @age = value + end # end EVAL end end |