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"particularly clojure libraries, that make heavy but judicious use of macros"

Try the Clojure standard libraries. Many central parts of the language like "->>" are macros.

oh, yes, indeed, the ->> macro is slick. reminds me of the bind operator in haskell. i don't know why i haven't seen something like it in other lisps. but as you said, that's part of the language.

anyway, should clarify: i'm interested in libraries that define and then use lots of macros in order to solve a specific problem. i'd like to know what problem domains are particularly well suited to the sort of language extension that macros provide.

> but as you said, that's part of the language.

Well no since it's a macro. It's part of the standard library, not a special form part of the language.

The point of macros is to blur the distinction between what's "built-in" and what's "user-defined" to the point of irrelevancy.

For example, threading macros in Racket: https://github.com/greghendershott/rackjure/blob/master/rack...

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