diff options
Diffstat (limited to 'lib/csc/gensym.csc')
| -rw-r--r-- | lib/csc/gensym.csc | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/lib/csc/gensym.csc b/lib/csc/gensym.csc new file mode 100644 index 0000000..480cbc2 --- /dev/null +++ b/lib/csc/gensym.csc @@ -0,0 +1,27 @@ +(define-library (csc gensym) + (export + gensym + gensym->int + gensym=? + gensym?) + (import (scheme base)) + (begin + + + (define-record-type <gensym> + (make-gensym id) + gensym? + (id gensym->int)) + + + (define (gensym=? s1 s2) + (= (gensym->int s1) (gensym->int s2))) + + + (define *next-id* 0) + + + (define (gensym) + (let ((sym (make-gensym *next-id*))) + (set! *next-id* (+ 1 *next-id*)) + sym)))) |
