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|
class C
def foo
@x = 1
p defined? @x
@y = nil
p defined? @y
p defined? @z
@@y = 1
p defined? @@y
@@y = nil
p defined? @@y
p defined? @@z
end
end
puts 1
p defined? C
puts 2
C.new.foo
puts 3
x1 = 1
1.times {|x2|
p defined? x1
p defined? x2
}
puts 4
p defined? 1
puts 5
p defined? dummy
puts 6
p defined? puts
puts 7
p defined? String
"123" =~ /(1)/
puts 8
p defined? $HELLO
p defined? $-
p defined? $-a
p defined? $-x
p defined? $!
p defined? $@
p defined? $:
p defined? $;
p defined? $"
p defined? $,
p defined? $;
p defined? $/
p defined? $\
p defined? $*
p defined? $$
p defined? $?
p defined? $=
p defined? $:
p defined? $"
p defined? $<
p defined? $>
p defined? $.
p defined? $0
p defined? $~
p defined? $&
p defined? $`
p defined? $'
p defined? $+
p defined? $1
puts 9
p defined? Math::PI
puts 10
p defined? a = 1
p defined? a += 1 #assignment
p defined?(a &&= 1) #expression
puts 11
p defined? a
puts 12
p defined? 42.times
p defined? Kernel::puts
puts 13
p defined? 1 + foo
p defined? def foo; end
p defined? lambda {}
puts 14
p (s = defined? :foo)
p (t = defined? :bar)
p s.object_id == t.object_id
puts 15
p defined? nil
p defined? true
p defined? false
p defined? self
Q = nil
puts 16
p defined? P
p defined? Q
=begin
TODO: super is complicated - define_method, etc.
puts 17
class C
def f
p defined? super
end
end
class D < C
def f
p defined? super
super
end
end
D.new.f
=end
puts 18
def g
p defined? yield
end
g
g {}
puts 19
undef g
undef g rescue p $!
p defined? g
|
