# Class#dup

e\$B!!\$5\$5\$@\$G\$9!%e(B

e\$B!!e(Bruby-core e\$B\$N\$[\$&\$Ge(B Class#dup
e\$B\$9\$k\$H;W\$C\$?DL\$j\$NF0:n\$K\$J\$i\$J\$\$!\$\$He(B
e\$B\$\$\$&%l%]!<%H\$r\$b\$i\$\$\$^\$7\$?!%e(B

class A
@@a = ‘A’
def a=(x)
@@a = x
end
def a
@@a
end
end

B = A.dup
B.new.a = ‘B’
p A.new.a #=> ‘B’
#=> 1.8.7 e\$B\$@\$He(B ‘A’

e\$B!!\$[\$H\$s\$I!\$e(BClass#dup
e\$B\$N\$3\$H\$r9M\$(\$F\$\$\$J\$+\$C\$?\$N\$G\$9\$,!\$\$3\$NLdBj\$O??e(B
e\$BLLL\$K<h\$j07\$&I,MW\$,\$"\$k\$G\$7\$g\$&\$+!%Nc\$(\$P!\$e(BClass#dup
e\$B\$O%5%]!<%H\$7\$Je(B
e\$B\$\$!\$\$H\$\$\$&\$N\$b<j\$+\$H;W\$\$\$^\$9!%\$d\$O\$j\$3\$l\$OI,MW\$J5!G=\$@!\$\$H??LLL\$K9Me(B
e\$B\$(\$k\$J\$i!\$\$,\$i\$j\$HFbIt9=B\$\$rJQ99\$9\$kI,MW\$,\$"\$j\$^\$9!%\$b\$7I,MW\$J\$i!\$e(B
1.9.0-3 e\$B\$^\$G\$K4V\$K9g\$&\$h\$&\$KJQ99\$7\$?\$\$\$H;W\$\$\$^\$9!%e(B

e\$B!!\$A\$J\$\$K!\$<!\$N\$h\$&\$JNc\$r;n\$7\$F\$\$?\$H\$3\$m!\$e(B1.8.7
e\$B\$G\$OJQ\$J%(%i!<\$K\$Je(B
e\$B\$j\$^\$7\$?!%e(B

class A
Const = ‘A’
def foo
p Const
end
end

B = A.dup

class B
Const = ‘B’
end

p A::Const
A.new.foo
p B::Const
B.new.foo # 1.8.6 e\$B0JA0!\$e(B1.9.0 ‘A’
# 1.8.7 e\$B\$@\$H%(%i!<!%\$3\$l\$O%P%0\$C\$]\$\$!%e(B

e\$B!!\$5\$5\$@\$G\$9!%e(B

e\$B!!\$3\$l!\$\$I\$&\$7\$^\$7\$g\$&!d\$^\$D\$b\$H\$5\$se(B