ReactiveCocoa/ReactiveCocoa — pull request #1009 by jspahrsummers (2013-12-15 09:53:01+00:00)
Title: Add -[RACSignal signalGenerator]

[`RACAction`](https://github.com/ReactiveCocoa/ReactiveCocoa/pull/1001) already does this internally. It's a useful operation for easily creating `RACAggregatingSignalGenerator`s, as well as avoiding block lifetime management when you only need a constant generator.