Macros

#""

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.

apply-template

For use in macros. argv is an argument list, as in defn. expr is a quoted expression using the symbols in argv. val...

definline

Experimental - like defmacro, except defines a named function whose body is the expansion, calls to which may be expan...

defmacro

Like defn, but the resulting function name is declared as a macro and will be used as a macro by the compiler when it ...

do-template

Repeatedly copies expr (in a do block) for each group of arguments in values. values are automatically partitioned by...

gensym

Returns a new symbol with a unique name. If a prefix string is supplied, the name is prefix# where # is some unique nu...

macroexpand

Repeatedly calls macroexpand-1 on form until it no longer represents a macro form, then returns it. Note neither ma...

macroexpand-1

If form represents a macro form, returns its expansion, else returns form.

quote

Yields the unevaluated form.