================
@@ -9744,6 +9744,16 @@ static void DiagnoseNarrowingInInitList(Sema &S,
case NK_Constant_Narrowing: {
// A constant value was narrowed.
+
+ // Overflow behavior destination types with a 'wrap' kind can elide
----------------
JustinStitt wrote:
Check out `OverflowBehaviorTypes.rst`'s header regarding `C++ Narrowing
Conversions`. The idea is that wrapping types are allowed to abuse wrap-around
and intentional truncation/narrowing, we shouldn't warn in these cases.
```c
u32 a;
fun_stuff(&a);
// we are a power user, we've specified behavior for this u8.
u8 __wrap b = a; // potentially abuse truncation/narrowing without littering
(u8) casts in places.
```
https://github.com/llvm/llvm-project/pull/148914
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