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class Module
# Declare an attribute reader backed by an internally-named instance variable.
def attr_internal_reader(*attrs)
attrs.each do |attr|
module_eval "def #{attr}() #{attr_internal_ivar_name(attr)} end"
end
end
# Declare an attribute writer backed by an internally-named instance variable.
def attr_internal_writer(*attrs)
attrs.each do |attr|
module_eval "def #{attr}=(v) #{attr_internal_ivar_name(attr)} = v end"
end
end
# Declare attributes backed by 'internal' instance variables names.
def attr_internal_accessor(*attrs)
attr_internal_reader *attrs
attr_internal_writer *attrs
end
alias_method :attr_internal, :attr_internal_accessor
private
mattr_accessor :attr_internal_naming_format
self.attr_internal_naming_format = '@_%s'
def attr_internal_ivar_name(attr)
attr_internal_naming_format % attr
end
end
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