Tom> Is it possible to add a logical length field too? I presume it is
Tom> too expensive to recalculate the logical (character) length of a
Tom> string each time len(s) is called? Doing this is only slightly more
Tom> time consuming than a normal strlen: ...
Note that currently the len() method doesn't call strlen() at all. It just
returns the ob_size field. Presumably, with Just's proposal len() would
simply return ob_size/width. If you used a variable width encoding, Just's
plan wouldn't work. (I don't know anything about string encodings - is
UTF-8 variable width?)
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