Sorry to keep revising things; here's an improved version of let->,
which better supports (as near as I can tell -- please try to break)
arbitrary let-style destructuring. (The previous version favored
single-symbol bindings, but I can imagine use cases where [a b :as
all] kinds of destructuring are useful.)
Perry
(defmacro let->
"Like ->, but takes a binding form as first argument, the bound
symbol(s) from which will carry the resulting value from each form."
([[bind init] form]
(if (seq? form)
`(let [~bind ~init] ~form)
(list form init)))
([[bind init] form & more]
`(let-> [~bind (let-> [~bind ~init] ~form)] ~...@more)))
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