[-Wunsafe-buffer-usage] Check assignments to implicitly immutable count-attributed objects #11625
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patrykstefanski
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Oct 16, 2025
clang/test/SemaCXX/warn-unsafe-buffer-usage-count-attributed-pointer-assignment.cpp
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…nt-attributed objects
Check assignments to count-attributed objects that are implicitly
immutable. For example, assigning to a dependent count that is used in
an inout pointer is not allowed, since the update won't be visible on
the call-site:
```
void foo(int *__counted_by(count) *out_p, int count) {
*out_p = ...;
count = ...; // immutable
}
```
rdar://161608157
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Check assignments to count-attributed objects that are implicitly immutable. For example, assigning to a dependent count that is used in an inout pointer is not allowed, since the update won't be visible on the call-site:
rdar://161608157