From a1906758c31036c30f8c11703daa4202adde8dac Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Thu, 17 Jul 2014 16:45:45 +0200
Subject: records: Report unknown field names in inheriting forms.

* guix/records.scm (define-record-type*)[record-inheritance]: Check for
  unexpected field names.
* tests/records.scm ("define-record-type* with let* behavior"): Return
  #t, not *unspecified*.
  ("define-record-type* & inherit & extra initializers"): New test.
---
 guix/records.scm | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'guix')

diff --git a/guix/records.scm b/guix/records.scm
index e60732dd43..cd887b77ce 100644
--- a/guix/records.scm
+++ b/guix/records.scm
@@ -69,6 +69,14 @@ thunked fields."
                                field+value)
                          car))
 
+                ;; Make sure there are no unknown field names.
+                (let* ((fields     (map (compose car syntax->datum)
+                                        field+value))
+                       (unexpected (lset-difference eq? fields 'expected)))
+                  (when (pair? unexpected)
+                    (record-error 'name s "extraneous field initializers ~a"
+                                  unexpected)))
+
                 #`(make-struct type 0
                                #,@(map (lambda (field index)
                                          (or (field-inherited-value field)
-- 
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