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Co-authored-by: Josselin Poiret --- guix/records.scm | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/guix/records.scm b/guix/records.scm index 7d43b064d8..d8966998c1 100644 --- a/guix/records.scm +++ b/guix/records.scm @@ -105,7 +105,12 @@ (define (report-duplicate-field-specifier name ctor) (define-syntax map-fields (lambda (x) - (syntax-violation 'map-fields "bad use of syntactic keyword" x x))) + (syntax-case x () + ((_ type within) + (syntax-violation (syntax->datum #'within) + "undefined guix record-type" + #'type)) + (_ (syntax-violation 'map-fields "bad use of syntactic keyword" x x))))) (define-syntax-parameter this-record (lambda (s) @@ -459,7 +464,7 @@ (define-syntax type "This macro lets us query record type info at macro-expansion time." (syntax-case s (map-fields) - ((_ map-fields macro) + ((_ (map-fields _ _) macro) #'(macro (field ...))) (id (identifier? #'id) @@ -595,7 +600,7 @@ (define-syntax match-record-inner #'(let-syntax ((field-offset (syntax-rules () ((_ f) (lookup-field field 0 f))))) - (let* ((offset (type map-fields field-offset)) + (let* ((offset (type (map-fields type match-record) field-offset)) (variable (struct-ref record offset))) (match-record-inner record type (rest ...) body ...)))) ((_ record type (field rest ...) body ...) -- 2.39.2