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| author | Nicholas Clark <nick@ccl4.org> | 2004-07-13 21:10:21 +0000 |
|---|---|---|
| committer | Nicholas Clark <nick@ccl4.org> | 2004-07-13 21:10:21 +0000 |
| commit | a5c75c1d181494e06a58988f267a8b3d081df483 (patch) | |
| tree | 341b41398681a3b3681ff22304da7bd08fd5a7ff /pod/perltodo.pod | |
| parent | 60cb11a8de37fb2d6b164364e3bb7cdc6724a2c4 (diff) | |
| download | perl-a5c75c1d181494e06a58988f267a8b3d081df483.tar.gz | |
Some thoughts on foreach reverse
p4raw-id: //depot/perl@23104
Diffstat (limited to 'pod/perltodo.pod')
| -rw-r--r-- | pod/perltodo.pod | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/pod/perltodo.pod b/pod/perltodo.pod index db7274c23f..156095635c 100644 --- a/pod/perltodo.pod +++ b/pod/perltodo.pod @@ -183,6 +183,10 @@ code review. Also fchdir is available in some platforms." The old perltodo notes that we could optimise foreach to iterate in reverse. (instead of making a reversed copy on the stack) +It seems that cx->blk_loop.itermax could be hijacked to act as a go up/go +down flag, with cx->blk_loop.iterix primed in pp_enteriter for the go down +case (ie reverse). However, it looks slightly tricky identifying the shape of +foreach reverse in the optree in Perl_peep. =head1 Tests |