継続でbreakのようなことをする
#!/usr/bin/env ruby callcc {|_break| puts "a" puts "b" _break.call puts "c" }
#!/usr/bin/env gosh (call/cc (lambda (break) (print "a") (print "b") (break) (print "c") ))
#!/usr/bin/env ruby callcc {|_break| puts "a" puts "b" _break.call puts "c" }
#!/usr/bin/env gosh (call/cc (lambda (break) (print "a") (print "b") (break) (print "c") ))