Class: Class
- Inherits:
-
Object
- Object
- Class
- Defined in:
- lib/fap/support/class.rb
Overview
Extends the class object with class and instance accessors for class attributes, just like the native attr* accessors for instance attributes.
class Person
cattr_accessor :hair_colors
end
Person.hair_colors = [:brown, :black, :blonde, :red]
Instance Method Summary collapse
- #cattr_accessor(*syms) ⇒ Object
- #cattr_reader(*syms) ⇒ Object
- #cattr_writer(*syms) ⇒ Object
-
#extlib_inheritable_accessor(*syms, &block) ⇒ Array[#to_s]
Defines class-level inheritable attribute accessor.
-
#extlib_inheritable_reader(*ivars) ⇒ Array[#to_s]
Defines class-level inheritable attribute reader.
-
#extlib_inheritable_writer(*ivars) ⇒ Array[#to_s]
Defines class-level inheritable attribute writer.
Instance Method Details
#cattr_accessor(*syms) ⇒ Object
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# File 'lib/fap/support/class.rb', line 74 def cattr_accessor(*syms) cattr_reader(*syms) cattr_writer(*syms) end |
#cattr_reader(*syms) ⇒ Object
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# File 'lib/fap/support/class.rb', line 34 def cattr_reader(*syms) syms.flatten.each do |sym| next if sym.is_a?(Hash) class_eval(<<-EOS, __FILE__, __LINE__ + 1) unless defined? @@#{sym} # unless defined? @@hair_colors @@#{sym} = nil # @@hair_colors = nil end # end # def self.#{sym} # def self.hair_colors @@#{sym} # @@hair_colors end # end # def #{sym} # def hair_colors @@#{sym} # @@hair_colors end # end EOS end end |
#cattr_writer(*syms) ⇒ Object
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# File 'lib/fap/support/class.rb', line 53 def cattr_writer(*syms) = syms. syms.flatten.each do |sym| class_eval(<<-EOS, __FILE__, __LINE__ + 1) unless defined? @@#{sym} # unless defined? @@hair_colors @@#{sym} = nil # @@hair_colors = nil end # end # def self.#{sym}=(obj) # def self.hair_colors=(obj) @@#{sym} = obj # @@hair_colors = obj end # end # #{" # def #{sym}=(obj) # def hair_colors=(obj) @@#{sym} = obj # @@hair_colors = obj end # end " unless [:instance_writer] == false } # # instance writer above is generated unless options[:instance_writer] == false EOS end end |
#extlib_inheritable_accessor(*syms, &block) ⇒ Array[#to_s]
Defines class-level inheritable attribute accessor. Attributes are available to subclasses, each subclass has a copy of parent’s attribute.
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# File 'lib/fap/support/class.rb', line 153 def extlib_inheritable_accessor(*syms, &block) extlib_inheritable_reader(*syms) extlib_inheritable_writer(*syms, &block) end |
#extlib_inheritable_reader(*ivars) ⇒ Array[#to_s]
Do we want to block instance_reader via :instance_reader => false
It would be preferable that we do something with a Hash passed in (error out or do the same as other methods above) instead of silently moving on). In particular, this makes the return value of this function less useful.
Defines class-level inheritable attribute reader. Attributes are available to subclasses, each subclass has a copy of parent’s attribute.
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# File 'lib/fap/support/class.rb', line 92 def extlib_inheritable_reader(*ivars) instance_reader = ivars.pop[:reader] if ivars.last.is_a?(Hash) ivars.each do |ivar| self.class_eval <<-RUBY, __FILE__, __LINE__ + 1 def self.#{ivar} return @#{ivar} if self.object_id == #{self.object_id} || defined?(@#{ivar}) ivar = superclass.#{ivar} return nil if ivar.nil? && !#{self}.instance_variable_defined?("@#{ivar}") @#{ivar} = ivar && !ivar.is_a?(Module) && !ivar.is_a?(Numeric) && !ivar.is_a?(TrueClass) && !ivar.is_a?(FalseClass) ? ivar.dup : ivar end RUBY unless instance_reader == false self.class_eval <<-RUBY, __FILE__, __LINE__ + 1 def #{ivar} self.class.#{ivar} end RUBY end end end |
#extlib_inheritable_writer(*ivars) ⇒ Array[#to_s]
We need a style for class_eval <<-HEREDOC. I’d like to make it class_eval(<<-RUBY, __FILE__, __LINE__), but we should codify it somewhere.
Defines class-level inheritable attribute writer. Attributes are available to subclasses, each subclass has a copy of parent’s attribute.
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# File 'lib/fap/support/class.rb', line 126 def extlib_inheritable_writer(*ivars) instance_writer = ivars.pop[:writer] if ivars.last.is_a?(Hash) ivars.each do |ivar| self.class_eval <<-RUBY, __FILE__, __LINE__ + 1 def self.#{ivar}=(obj) @#{ivar} = obj end RUBY unless instance_writer == false self.class_eval <<-RUBY, __FILE__, __LINE__ + 1 def #{ivar}=(obj) self.class.#{ivar} = obj end RUBY end self.send("#{ivar}=", yield) if block_given? end end |