Sha256: cf4dff9087f3cc2fd5a3f5823937bda20c1515e45d4836b2d79377ff047c78bd
Contents?: true
Size: 920 Bytes
Versions: 10
Compression:
Stored size: 920 Bytes
Contents
# TITLE:
#
# Abstract method.
#
# SUMMARY:
#
# Create an abstrct method. If it is not overriden it will raise
# an exception when called.
#
# AUTHORS:
#
# - Thomas Sawyer
#
class Module
# Creates a method that requires to be overridding.
# If it not overridden and called upon a TypeError
# will be raised.
#
# class C
# abstract :a
# end
#
# c = C.new
# c.a #=> Error: undefined abstraction #a
#
def abstract( *sym )
sym.each { |s|
define_method( s ) { raise TypeError, "undefined abstraction ##{s}" }
}
end
end
=begin test
require 'test/unit'
class TestAttrTester < Test::Unit::TestCase
class Aq
abstract :q
end
def test_abstract_01
ac = Aq.new
assert_raises( TypeError ) { ac.q }
end
def test_abstract_02
ac = Class.new { abstract :q }.new
assert_raises( TypeError ) { ac.q }
end
end
=end
Version data entries
10 entries across 10 versions & 1 rubygems