Defining Macros
===============

  You use the Texinfo `@macro' command to define a macro.  For example:

     @macro MACRO-NAME{PARAM1, PARAM2, ...}
     TEXT ... \PARAM1\ ...
     @end macro

  The "parameters" PARAM1, PARAM2, ... correspond to arguments supplied
when the macro is subsequently used in the document (see the next
section).

  If a macro needs no parameters, you can define it either with an empty
list (`@macro foo {}') or with no braces at all (`@macro foo').

  The definition or "body" of the macro can contain any Texinfo
commands, including previously-defined macros.  (It is not possible to
have mutually recursive Texinfo macros.)  In the body, instances of a
parameter name surrounded by backslashes, as in `\PARAM1\' in the
example above, are replaced by the corresponding argument from the
macro invocation.

  You can undefine a macro FOO with `@unmacro FOO'.  It is not an error
to undefine a macro that is already undefined.  For example:

     @unmacro foo