Re: Results of the memswap() smackdown from the thread "Sorting" assignment

In article <47B5C712.55AE336F@xxxxxxxxx>, CBFalconer
<cbfalconer@xxxxxxxxx> writes
If we define a "string literal" as "characters between
non-escaped quotes" then C strings can contain nuls, as I showed.

We don't. From N869:
[...]

Actually, a "string literal" *is* "characters between non-escaped
quotes":

6.4.5 String literals
Syntax
string-literal:
" s-char-sequenceopt "
L" s-char-sequenceopt "
s-char-sequence:
s-char
s-char-sequence s-char
s-char:
any member of the source character set except the double-
quote ", backslash \, or new-line character
escape-sequence

Description
A character string literal is a sequence of zero or more multibyte
characters enclosed in double-quotes, as in "xyz". A wide string
literal is the same, except prefixed by the letter L.

As such, it can only contain a NUL if that is a valid character in the
extended source character set. Very probably it isn't.

The string literal "ab\0cd" causes the creation of an array of 6 chars
initialized with { 'a', 'b', 0, 'c', 'd', 0 }, but that isn't the string
literal, it's an array.

"string literal" is a compile-time concept. "string" is a run-time one.

--
Clive D.W. Feather | Home: <clive@xxxxxxxxxx>
Tel: +44 20 8495 6138 (work) | Web: <http://www.davros.org>
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