begin-syntax

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This is a small extension that allows for inline macro operations.

The source for this extension is available here.

Evaluates its body and immediately inserts the final result into the program, as though by macro expansion.

If the result is a macro transformer, it is immediately invoked with no arguments and the result is inserted into the program.

This form can be thought of as a macro definition followed by its immediate expansion, for example:

(begin-syntax '(+ 1 2))

; => (let-syntax ((a (er-macro-transformer
;                     (lambda (_ _ _) '(+ 1 2)))))
;      (a))

3-Clause BSD