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-rw-r--r--ccwl/ccwl.scm6
-rw-r--r--tests/ccwl.scm10
2 files changed, 16 insertions, 0 deletions
diff --git a/ccwl/ccwl.scm b/ccwl/ccwl.scm
index a476406..f9243aa 100644
--- a/ccwl/ccwl.scm
+++ b/ccwl/ccwl.scm
@@ -307,6 +307,12 @@ identifiers defined in the commands."
((prefix string-arg) (and (string? (syntax->datum #'prefix))
(string? (syntax->datum #'string-arg)))
(list #'prefix #'string-arg))
+ ;; Prefixes that are not strings
+ ((prefix _)
+ (raise-exception
+ (condition (ccwl-violation #'prefix)
+ (formatted-message "Invalid prefix ~a. Prefixes must be strings."
+ (syntax->datum #'prefix)))))
(_
(raise-exception
(condition (ccwl-violation x)
diff --git a/tests/ccwl.scm b/tests/ccwl.scm
index 7cbb2c0..b26e854 100644
--- a/tests/ccwl.scm
+++ b/tests/ccwl.scm
@@ -264,4 +264,14 @@
(test-assert "tolerate prefixed string arguments in command definitions"
(command #:run "echo" ("-x" "foo")))
+(test-assert "command definitions with non-string prefixes in prefixed inputs must raise a &ccwl-violation condition"
+ (guard (exception
+ (else (and (ccwl-violation? exception)
+ (string=? (formatted-message-format exception)
+ "Invalid prefix ~a. Prefixes must be strings."))))
+ (begin (macroexpand
+ '(command #:inputs (number #:type int)
+ #:run "echo" (-x number)))
+ #f)))
+
(test-end "ccwl")