Loop invariants and harnesses for memchr functions #429
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…verify-rust-std into memchrinvariant
tautschnig
reviewed
Aug 16, 2025
| @@ -36,6 +40,7 @@ const fn memchr_naive(x: u8, text: &[u8]) -> Option<usize> { | |||
| let mut i = 0; | |||
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| // FIXME(const-hack): Replace with `text.iter().pos(|c| *c == x)`. | |||
| #[cfg_attr(kani, kani::loop_invariant(i <= text.len() && forall!(|j in (0,i)| unsafe {*text.as_ptr().wrapping_add(j)} != x)))] | |||
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We will need to use an SMT solver for any function that eventually invokes this function.
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This PR adds loop invariants and harnesses for memchr functions
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