return_bang¶ ↑

home

github.com/drbrain/return_bang

rdoc

docs.seattlerb.org/return_bang

bugs

github.com/drbrain/return_bang/issues

return_bang implements non-local exits for methods. As a bonus, you also get exception handling that ignores standard Ruby’s inflexible begin; rescue; ensure; end syntax.

Use return_bang to exit back to a processing loop from deeply nested code, or just to confound your enemies and your friends! What could possibly go wrong?

• Implements non-local exits for methods

• Nestable

• Named and stack-based exit points, go exactly where you need to be

• Full exception handling support through raise!, rescue! and ensure!

• Ignores pesky ensure, rescue and require blocks for when you really, really need to return

• Not enough use of continuations

require 'return_bang/everywhere'

def some_method
  deeply_nested
  # never reached
end

def deeply_nested
  return!
end

return_here do
  some_method
end
# resumes here

“you’ll wind up with your cock in /dev/null somehow” – slyphon

“Haha! Right! This skips ensure… SO EVIL‼‼” – drbrain

“This is so evil that 6 def test_… have turned into: 16 tests, 65 assertions, 18 failures, 7 errors” – drbrain

sudo gem install return_bang

After checking out the source, run:

$ rake newb

This task will install any missing dependencies, run the tests/specs, and generate the RDoc.

(The MIT License)

Copyright © Eric Hodel

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ‘Software’), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED ‘AS IS’, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.