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A Lisp macro is a user-defined construct that extends the Lisp
language. It is represented as an object much like a function, but with
different argument-passing semantics. A Lisp macro has the form of a
list whose first element is the symbol
macro and whose CDR
is a Lisp function object, including the
Lisp macro objects are usually defined with the built-in
defmacro function, but any list that begins with
a macro as far as Emacs is concerned. See section 13. Macros, for an explanation
of how to write a macro.
Warning: Lisp macros and keyboard macros (see section 21.15 Keyboard Macros) are entirely different things. When we use the word "macro" without qualification, we mean a Lisp macro, not a keyboard macro.
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