| Issue |
145651
|
| Summary |
[clang-tidy] `bugprone-signed-char-misuse` gives false positives in C23 for enum with signed char type
|
| Labels |
clang-tidy
|
| Assignees |
|
| Reporter |
bjosv
|
When running `bugprone-signed-char-misuse` on C23 code that uses [enums](https://en.cppreference.com/w/c/language/enum.html
) with a fixed underlying type of `signed char` we get warnings.
```
enum e : signed char {
E_M128 = -128,
};
enum e state = E_M128;
```
A full example:
https://godbolt.org/z/vGTj966TY
The checker gets that the RHS EnumConstant is a `signed char` but don't use the fact that LHS is of type signed char, giving a warning.
The RHS seems to give the AST
`ImplicitCastExpr <col:13> 'e_t':'enum e' <IntegralCast>`
but we have not found anything in the standard that motivates the warning and we believe it's a false positive.
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