You are looking at historical revision 39572 of this page. It may differ significantly from its current revision.
Outdated egg!
This is an egg for CHICKEN 4, the unsupported old release. You're almost certainly looking for the CHICKEN 5 version of this egg, if it exists.
If it does not exist, there may be equivalent functionality provided by another egg; have a look at the egg index. Otherwise, please consider porting this egg to the current version of CHICKEN.
begin-syntax
Description
This is a small extension that allows for inline macro operations.
The source for this extension is available here.
Usage
[syntax] (begin-syntax EXPR ...)Evaluates its body and immediately inserts the final result into the program, as though by macro expansion.
If the result is a macro transformer, then this is immediately invoked with no arguments and the result is inserted into the program. Note that in this case the final expression of the begin-syntax body will be evaluated twice.
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))
Author
License
3-Clause BSD