diff options
Diffstat (limited to 'gensym.csc')
| -rw-r--r-- | gensym.csc | 25 |
1 files changed, 25 insertions, 0 deletions
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 <gensym> + (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)))) |
