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Re: `aset` on strings, changing the size in bytes

From: Eli Zaretskii
Subject: Re: `aset` on strings, changing the size in bytes
Date: Sat, 08 Sep 2018 23:59:47 +0300

> From: Stefan Monnier <address@hidden>
> Date: Sat, 08 Sep 2018 14:36:46 -0400
> The need for an indirection (a String_Object has to hold a pointer to an
> sdata object rather than being able to keep its payload directly in the
> Lisp_String object (using FLEXIBLE_ARRAY_MEMBER))

Why is that a problem?

> and the unexpected memory allocation behavior (users who aren't
> privy to the underlying implementation would never expect a
> primitive like `aset` to internally perform a copy of the string's
> bytes).

Only C-level programming sees that, and it will never see it if
strings are treated like buffers, i.e. not passed as C pointers to
text.  So I don't see why this would be a problem, given the small
number of people who work at that level, and an even smaller number of
people who make changes in the low-level code which depends on that.

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