On 02/07/14 16:04, Per Bothner wrote:
>
> In other words: Supporting string-replace! has no extra overheads beyond
> requiring an "indirect" representation.  The latter is forced anyway if
> you support mutability and full Unicode, unless you use 3- or 4-byte characters.
> Even if you do use 3- or 4-byte characters, indirection is worth it, because
> mutable fixed-size strings is an essentially-useless feature.
>

Also, said indirection may be bent to support an efficient substring
operation, by sharing a common character array (although you may well
regret also allowing mutation in that case...)

ABS

--
Alaric Snell-Pym
http://www.snell-pym.org.uk/alaric/

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