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| author | Kaz Kylheku <kaz@kylheku.com> | 2021-01-21 18:19:18 -0800 |
|---|---|---|
| committer | Kaz Kylheku <kaz@kylheku.com> | 2021-01-21 18:19:18 -0800 |
| commit | 92be6184625250720f874a4c2219a2e5f2f1b70c (patch) | |
| tree | 8eb766ae633fabb221682711212e4f45ef6ce864 /share | |
| parent | 1ff1b51eee6bbf3042ee3a572f6e750ad1897590 (diff) | |
| download | txr-92be6184625250720f874a4c2219a2e5f2f1b70c.tar.gz txr-92be6184625250720f874a4c2219a2e5f2f1b70c.tar.bz2 txr-92be6184625250720f874a4c2219a2e5f2f1b70c.zip | |
matcher: @(some) and @(all) work with sequences.
Relax the restrictions in these operators so they work with
sequences rather than specifically lists.
* share/txr/stdlib/match.tl (compile-loop-match): Make the
necessary adjustments so that abstract iteration is used.
* txr.1: Documented.
Diffstat (limited to 'share')
| -rw-r--r-- | share/txr/stdlib/match.tl | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/share/txr/stdlib/match.tl b/share/txr/stdlib/match.tl index 75f58db8..b8287c55 100644 --- a/share/txr/stdlib/match.tl +++ b/share/txr/stdlib/match.tl @@ -217,25 +217,31 @@ (defun compile-loop-match (exp obj-var var-list) (mac-param-bind *match-form* (op match) exp - (let* ((list-test (if (eq op 'usr:all*) 'consp 'listp)) + (let* ((all*-p (eq op 'usr:all*)) (some-p (eq op 'some)) (item-var (gensym "item-")) (cm (compile-match match item-var var-list)) (loop-success-p-var (gensym "loop-success-p-")) (loop-continue-p-var (gensym "loop-terminate-p")) + (loop-iterated-var (if all*-p (gensym "loop-iterated-p"))) (matched-p-var (gensym "matched-p-")) (iter-var (gensym "iter-")) (collect-vars [mapcar gensym cm.vars]) - (loop ^(for ((,iter-var ,obj-var) - (,loop-continue-p-var t)) - ((and ,loop-continue-p-var ,iter-var) - ,(if some-p - ^(not ,loop-continue-p-var) - loop-continue-p-var)) - ((set ,iter-var (cdr ,iter-var))) - (let ((,cm.obj-var (car ,iter-var)) + (loop ^(for ((,iter-var (iter-begin ,obj-var)) + (,loop-continue-p-var t) + ,*(if all*-p ^((,loop-iterated-var nil)))) + ((and ,loop-continue-p-var (iter-more ,iter-var)) + ,(cond + (some-p ^(not ,loop-continue-p-var)) + (all*-p ^(and ,loop-iterated-var + ,loop-continue-p-var)) + (t loop-continue-p-var))) + ((set ,iter-var (iter-step ,iter-var))) + (let ((,cm.obj-var (iter-item ,iter-var)) ,matched-p-var ,*(if some-p cm.(get-temps) cm.(get-vars))) + ,*(if all*-p + ^((set ,loop-iterated-var t))) ,cm.(wrap-guards ^(progn ,*cm.(assignments) (if ,cm.test-expr @@ -249,7 +255,7 @@ (set ,loop-continue-p-var nil))))) (guard (new match-guard vars (append cm.vars (unless some-p collect-vars)) - guard-expr ^(,list-test ,obj-var)))) + guard-expr ^(seqp ,obj-var)))) (new compiled-match pattern exp obj-var obj-var |