diff options
Diffstat (limited to 'mew.scm')
| -rw-r--r-- | mew.scm | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/mew.scm b/mew.scm index be9ae9b..17be96d 100644 --- a/mew.scm +++ b/mew.scm @@ -420,8 +420,17 @@ ((procedure? obj) generator-for-each) (#t (error "no generic-for-each defined")))) + (define-syntax for-regroup + (syntax-rules () + ((_ () ((i obj) ...) body ...) + (void (final (gmap (match-lambda* ((i ...) body ...)) (gen obj) ...)))) + ((_ (i obj rest ...) (j ...) body ...) + (for-regroup (rest ...) (j ... (i obj)) body ...)))) + (define-syntax for (syntax-rules () + ((_ (i obj j obj2 rest ...) body ...) + (for-regroup (i obj j obj2 rest ...) () body ...)) ((_ (i obj) body ...) (let ((o obj)) ((generic-for-each o) (match-lambda (i body ...)) o))))) |