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-rw-r--r--lib/csc/gensym.csc27
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))))