good chemistry is complicated, and a little bit messy -LW |
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Wow. There needs to be a cheat sheet for this because every time it comes up I find mistakes, in this case my own. So my previous discovery that capturing parens cause the entire string to be copied is mostly not true. I assume the copy is required for s/// and s///g. Testing shows that otherwise the copy only happens for m// on modern perls (the 'scalar context' part doesn't appear to matter in my current testing) and doesn't even happen then with 5.6. It is nice that I can stop fearing the performance impact of capturing parens when doing the usual scalar-context m/.../gc of a parser. Thanks! - tye In reply to Re^4: Can we make $& better? (need)
by tye
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