Clojure Tutorial: Macro

This page is WORK IN PROGRESS.

Clojure has a thing called “macro”. It is like defn for defining a function. Except, it is used as a syntactic transformation. When a macro is defined, the compiler makes a note of it. When a macro is called, the compiler actually calls the transformed function.

• (defmacro name doc-string? attr-map? [params*] body)
• (defmacro name doc-string? attr-map? ([params*] body) + attr-map?)

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

• clojure.core/defmacro

• clojure.core/cons
• clojure.core/second
• clojure.core/first
• clojure.core/nnext

• clojure.core/macroexpand
• clojure.core/macroexpand-1

reference

• http://clojure.org/reference/reader#macrochars
• http://clojure.org/reference/macros