start moving implementation-dependent code into separate libraries

1 files changed, 20 insertions, 0 deletions

diff --git a/lib/cuprate/implementation/sagittarius.sld b/lib/cuprate/implementation/sagittarius.sld
new file mode 100644
index 0000000..ba630f0
--- /dev/null
+++ b/lib/cuprate/implementation/sagittarius.sld
@@ -0,0 +1,20 @@
+(define-library (cuprate implementation sagittarius)
+  (import (scheme base) (scheme format) (srfi 146 hash) (srfi 225))
+  (export pretty-print default-test-dto
+          alist->default-dictionary)
+  (begin
+    (define (pretty-print obj)
+      (show #t (pretty obj))))
+  (cond-expand
+    ;; Sagittarius has SRFI-146 hashmaps. If the full SRFI-225 is loaded
+    ;; (which is hackily checked by checking if micro-srfi-225 is NOT
+    ;; loadable) then use them.
+    ((library (micro-srfi-225))
+     (begin
+       (define default-test-dto eqv-alist-dto)
+       (define (alist->default-dictionary x) x)))
+    (else
+     (begin
+       (define default-test-dto hash-mapping-dto)
+       (define (alist->default-dictionary x)
+         (alist->hashmap (make-default-comparator) x))))))
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