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Matthiaspaul (talk | contribs) m →Pointers and references: -typo |
→Problems: Add a sentence about C23's solution |
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This allows idiomatic C code but does strip the const qualifier if the input actually was const-qualified, violating type safety. This solution was proposed by Ritchie and subsequently adopted. This difference is one of the failures of [[compatibility of C and C++]].
Since [[C2x|C23]], this problem solved with the use of generic functions. <code>strchr</code> and the other functions affected by the issue will return a <code>const</code> pointer if one was passed to them and an unqualified pointer if an unqualified pointer was passed to them.<!-- The phrasing needs some work but keep in mind that the array elements cannot be volatile or restrict. --><ref name="N3020">{{cite web |title=WG14-N3020 : Qualifier-preserving standard library functions |url=https://www.open-std.org/jtc1/sc22/wg14/www/docs/n3020.pdf |website=open-std.org |archive-url=https://web.archive.org/web/20221013190826/https://www.open-std.org/jtc1/sc22/WG14/www/docs/n3020.pdf |archive-date=October 13, 2022 |date=2022-06-13 |url-status=live}}</ref>
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