[PATCH] Replace define-macro with syntax-rules

[KAction]

From: Dmitry Bogatov <address@hidden>

As I can see, definition with define-macro is hygienic and 
move to syntax-rules adds two lines of code, but define-syntax 
is considered preferable. 

WDYT?
Signed-off-by: Dmitry Bogatov <address@hidden>
---
 module/rnrs/bytevectors.scm | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/module/rnrs/bytevectors.scm b/module/rnrs/bytevectors.scm
index 9744359..856ad4a 100644
--- a/module/rnrs/bytevectors.scm
+++ b/module/rnrs/bytevectors.scm
@@ -75,9 +75,12 @@
 (load-extension (string-append "libguile-" (effective-version))
                 "scm_init_bytevectors")
 
-(define-macro (endianness sym)
-  (if (memq sym '(big little))
-      `(quote ,sym)
-      (error "unsupported endianness" sym)))
+(define-syntax endianness
+    (syntax-rules ()
+        ((_ sym)
+         (let ((qsym (quote sym)))
+             (if (memq qsym '(big little))
+                 qsym
+                 (error "unsupported endianness" qsym))))))
 
 ;;; bytevector.scm ends here
-- 
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