From 4fc8b3c1c9dc4aa730e471708dcab7aed68f5a4b Mon Sep 17 00:00:00 2001 From: Rose Hogenson Date: Tue, 11 Jan 2022 21:55:29 -0800 Subject: Add a first implementation of a macro expander. This half-finished macro expander is the most satisfying piece of code I have ever written. --- gensym.csc | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 gensym.csc (limited to 'gensym.csc') diff --git a/gensym.csc b/gensym.csc new file mode 100644 index 0000000..a7c30c5 --- /dev/null +++ b/gensym.csc @@ -0,0 +1,25 @@ +(define-library (csc gensym) + (export + gensym + gensym=?) + (import (scheme base)) + (begin + + + (define-record-type + (make-gensym id) + gensym? + (id gensym-id)) + + + (define (gensym=? s1 s2) + (= (gensym-id s1) (gensym-id s2))) + + + (define *next-id* 0) + + + (define (gensym) + (let ((sym (make-gensym *next-id*))) + (set! *next-id* (+ 1 *next-id*)) + sym)))) -- cgit v1.3.1