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# Original code from Rails distribution.
# http://www.rubyonrails.com
#--
# Extends the module object with module and instance accessors
# for class attributes, just like the native attr* accessors for
# instance attributes. Aliases for classes are also provided.
#
# Example:
#
# mattr_accessor :my_attr, 'Default value'
#
# FIXME: I think those methods do *not* work as expected.
# FIXME: I should probably use @-attributes instead of
# @@-attributes.
#++
class Module # :nodoc:
# A macro that creates a reader method for class/module
# attributes.
def mattr_reader(*params)
default = if params.last.is_a?(Symbol) then nil else params.pop end
for sym in params
module_eval <<-"end_eval", __FILE__, __LINE__
if not defined?(@@#{sym.id2name})
@@#{sym.id2name} = #{default.inspect}
end
def self.#{sym.id2name}
@@#{sym}
end
end_eval
end
end
alias_method :cattr_reader, :mattr_reader
# A macro that creates a writer method for class/module
# attributes.
def mattr_writer(*params)
default = if params.last.is_a?(Symbol) then nil else params.pop end
for sym in params
module_eval <<-"end_eval", __FILE__, __LINE__
if not defined?(@@#{sym.id2name})
@@#{sym.id2name} = #{default.inspect.inspect}
end
def self.#{sym.id2name}=(obj)
@@#{sym.id2name} = obj
end
def self.set_#{sym.id2name}(obj)
@@#{sym.id2name} = obj
end
end_eval
end
end
alias_method :cattr_writer, :cattr_writer
# A macro that creates a reader and a writer method for
# class/module attributes.
def mattr_accessor(*syms)
mattr_reader(*syms)
mattr_writer(*syms)
end
alias_method :cattr_accessor, :mattr_accessor
end
# * George Moschovitis <gm@navel.gr>
Version data entries
11 entries across 11 versions & 1 rubygems