#""

Regex literal. #"pattern" compiles to java.util.regex.Pattern at read time.

#'

Var quote. #'foo resolves to the Var object itself.

#()

Anonymous function shorthand. #(+ %1 %2) expands to (fn [x y] (+ x y)).

#?

Reader conditional. #?(:clj expr :cljs expr) for .cljc files.

#?@

Splicing reader conditional.

#_

Discard. #_form causes the reader to ignore the next form.

#inst

Tagged literal for instants. #inst "2024-01-01".

#uuid

Tagged literal for UUIDs.

#{}

Set literal. #{1 2 3} creates a persistent hash set.

'

Quote. 'form expands to (quote form).

@

Deref. @ref expands to (deref ref).

^

Metadata. ^{:k v} form attaches metadata to the next form.

`

Syntax quote. Resolves symbols to fully-qualified names; allows ~ and ~@.

~

Unquote. Used inside syntax-quoted forms to evaluate an expression.

~@

Unquote-splicing. Splices a sequence into the surrounding form.