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Contents
##
## $Rev: 1 $
## $Release: 1.0.0 $
## copyright(c) 2006 kuwata-lab.com all rights reserved.
##
##
## helper to define abstract method in Ruby.
##
##
## example1. (shorter notation)
##
## require 'abstract'
## class Foo
## abstract_method 'arg1, arg2=""', :method1, :method2, :method3
## end
##
##
## example2. (RDoc friendly notation)
##
## require 'abstract'
## class Bar
## # ... method1 description ...
## def method1(arg1, arg2="")
## not_implemented
## end
##
## # ... method2 description ...
## def method2(arg1, arg2="")
## not_implemented
## end
## end
##
##
class Module
##
## define abstract methods
##
def abstract_method args_str, *method_names
method_names.each do |name|
module_eval <<-END
def #{name}(#{args_str})
mesg = "class \#{self.class.name} must implement abstract method `#{self.name}##{name}()'."
#mesg = "\#{self.class.name}##{name}() is not implemented."
err = NotImplementedError.new mesg
err.set_backtrace caller()
raise err
end
END
end
end
end
##
module Kernel
##
## raise NotImplementedError
##
def not_implemented #:doc:
backtrace = caller()
method_name = (backtrace.shift =~ /`(\w+)'$/) && $1
mesg = "class #{self.class.name} must implement abstract method '#{method_name}()'."
#mesg = "#{self.class.name}##{method_name}() is not implemented."
err = NotImplementedError.new mesg
err.set_backtrace backtrace
raise err
end
private :not_implemented
end
Version data entries
20 entries across 18 versions & 5 rubygems