From perlre, identical in both Strawberry 22.214.171.124 local docs and 5.16.2 on-line docs (emphases added):
\K  Keep the stuff left of the \K, don't include it in $&
(Note  simply refers to the discussion in the "Look-Around Assertions" section.)
From "Look-Around Assertions":
There is a special form of this construct, called "\K",
which causes the regex engine to "keep" everything it had
matched prior to the "\K" and not include it in $&.
Hmmm... I suppose when I read these sections heretofore, my attention was drawn to the "don't include..." clauses and I more or less ignored the "left of" and "prior to" statements. My naive association of "keep" is with inclusion: in this specific instance, everything to the right of \K is (or could be) included in $&. The docs seem to be using "keep" in the sense of "keep back", i.e., "to exclude": everything to the left of \K is "kept back" from inclusion in $&. Perhaps they are discussing the behavior \K in the context of substitution: everything left of the \K is not included in $& and so cannot be zapped by substitution: it is "kept safe" from substitution. But \K is equally valid and useful in both m// matching and s/// substitution, so...
I can't say I would agree with the perhaps subtle interpretation given to "keep" in the documentation, but it is fully clarified by the "don't include" language and by the examples, so I doubt this qualifies as a doc-bug.
Update: LanX: Almost as confusing like using single line and multi line modifier at the same time... ++That!
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||