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(slib.info)Defmacro

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Defmacro
========

  Defmacros are supported by all implementations.

 - Function: gentemp
     Returns a new (interned) symbol each time it is called.  The symbol
     names are implementation-dependent
          (gentemp) => scm:G0
          (gentemp) => scm:G1

 - Function: defmacro:eval e
     Returns the `slib:eval' of expanding all defmacros in scheme
     expression E.

 - Function: defmacro:load filename
     FILENAME should be a string.  If filename names an existing file,
     the `defmacro:load' procedure reads Scheme source code expressions
     and definitions from the file and evaluates them sequentially.
     These source code expressions and definitions may contain defmacro
     definitions.  The `macro:load' procedure does not affect the values
     returned by `current-input-port' and `current-output-port'.

 - Function: defmacro? sym
     Returns `#t' if SYM has been defined by `defmacro', `#f' otherwise.

 - Function: macroexpand-1 form
 - Function: macroexpand form
     If FORM is a macro call, `macroexpand-1' will expand the macro
     call once and return it.  A FORM is considered to be a macro call
     only if it is a cons whose `car' is a symbol for which a
     `defmacro' has been defined.

     `macroexpand' is similar to `macroexpand-1', but repeatedly
     expands FORM until it is no longer a macro call.

 - Macro: defmacro name lambda-list form ...
     When encountered by `defmacro:eval', `defmacro:macroexpand*', or
     `defmacro:load' defines a new macro which will henceforth be
     expanded when encountered by `defmacro:eval',
     `defmacro:macroexpand*', or `defmacro:load'.

Defmacroexpand
--------------

  `(require 'defmacroexpand)'

 - Function: defmacro:expand* e
     Returns the result of expanding all defmacros in scheme expression
     E.