Ruby goto

_.md

http://patshaughnessy.net/2012/2/29/the-joke-is-on-us-how-ruby-1-9-supports-the-goto-statement

goto.patch:

--- vm_opts.h
+++ vm_opts.h
@@ -48,7 +48,7 @@
 #define OPT_STACK_CACHING            0

 /* misc */
-#define SUPPORT_JOKE                 0
+#define SUPPORT_JOKE                 1

 #ifndef VM_COLLECT_USAGE_DETAILS
 #define VM_COLLECT_USAGE_DETAILS     0

rbenv install -f --patch 2.4.1 < goto.patch

goto.rb:

__label__(:loop)

puts "The Ruby core team is playing a joke on us!"

__goto__(:loop)

puts "This line of code is never reached."

goto.patch

--- vm_opts.h
+++ vm_opts.h
@@ -48,7 +48,7 @@
 #define OPT_STACK_CACHING            0

 /* misc */
-#define SUPPORT_JOKE                 0
+#define SUPPORT_JOKE                 1

 #ifndef VM_COLLECT_USAGE_DETAILS
 #define VM_COLLECT_USAGE_DETAILS     0
 

goto.rb

__label__(:loop)

puts "The Ruby core team is playing a joke on us!"

__goto__(:loop)

puts "This line of code is never reached."