you could do it with channels, but also by extending the go macro itself. The mini compiler behind the go macro is designed to be extensible. In the test suite

you could do it with channels, but also by extending the go macro itself. The mini compiler behind the go macro is designed to be extensible. In the test suite for core.async the compiler is run through a series of tests using a "runner" implementation of the go macro: https://github.com/clojure/core.async/blob/master/src/test/clojure/clojure/core/async/ioc_macros_test.clj https://github.com/clojure/core.async/blob/master/src/test/c... I've had generators working several times with an approach like this, but as it doesn't really fit with the rest of the library, I removed them. All that being said, these APIs are internal and could change at any moment.