[swannodette]

?

Clojure has deep language support for concurrency - from syntactical constructs to it's core performant immutable data structures.

[lukev]

But the beauty is that because it's a Lisp, it's all implemented in terms of macros - Clojure's complete set of concurrency tools could be written as a library.

The only exception is the deref reader macro "@", since Clojure doesn't allow user-defined reader macros by default.

[kanak]

> it's all implemented in terms of macros

This is not true at present. The core data structures, and the STM machinery are implemented in java, not as macros.

[plinkplonk]

He probably meant "distributed". Erlang has a better "distributed" story than Clojure.