Language overview

clojurust is a dialect of Clojure. Its syntax, data model, and core library are designed to be as compatible with Clojure as possible, with a small number of deliberate extensions and a small number of features that are not yet implemented.

What is the same

• All Clojure literal syntax: symbols, keywords, numbers (long, double, ratio, BigInt, BigDecimal), strings, characters, booleans, nil.
• All collection literals: list (...), vector [...], map {...}, set #{...}.
• Reader dispatch macros: ', `, ~, ~@, ^, @, #', #(...), #"...", ##Inf, ##-Inf, ##NaN, tagged literals.
• The full set of special forms: def, fn*, if, do, let*, loop*, recur, quote, var, set!, throw, try/catch/finally, letfn, binding.
• Persistent collections (HAMT-backed maps and sets, RRB vectors, linked lists, queues) with Clojure-compatible equality and hashing.
• clojure.core — arithmetic, comparison, collection operations, lazy sequences, transducers, I/O, concurrency primitives.
• Standard library namespaces: clojure.string, clojure.set, clojure.test, clojure.walk, clojure.edn, clojure.zip, clojure.data.
• Protocols (defprotocol, extend-type, extend-protocol), multimethods (defmulti, defmethod), records (defrecord), and reify.
• Concurrency: atom, future, promise, delay, volatile!, agent.
• Dynamic variables (binding, with-bindings, *ns*, *out*, etc.).
• Metadata on vars and some values (with-meta, meta, ^:dynamic, etc.).

Extensions

• Reader conditionals — the :rust platform key.
• Versioned symbols — my-fn@abc1234 syntax.
• A small set of new built-in functions with no Clojure equivalent.

Known differences and missing features

See Differences from Clojure for the full list.