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while-let: Keep looping while let bindings are truthy
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| (defmacro while-let | |
| "While all bindings are truthy, execute body. Useful for draining | |
| channels, buffers, anything that can be read, etc." | |
| [bindings & body] | |
| (let [pairs (partition 2 bindings) | |
| test-exprs (map second pairs) | |
| test-vals (map first pairs)] | |
| `(loop ~bindings | |
| (if (and ~@test-vals) | |
| (do | |
| ~@body | |
| (recur ~@test-exprs)))))) |
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