| Issue |
71543
|
| Summary |
[FR] clang tidy check for static_cast of an enum class type
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
FalcoGer
|
When casting an `enum class` type using `static_cast<T>`, this may result in a bug if the type `T` is not correct. In c++23 we have `std::to_underlying` which should be used instead.
```c++
// Fix, must add, if not already present:
#include <utility> // Provides std::to_underlying()
// NOLINTNEXTLINE(performance-enum-size)
enum class EType : int {};
auto main() -> int
{
// NOLINTNEXTLINE(readability-magic-numbers)
EType e {42};
[[maybe_unused]]
// c++23 and later only
// Original code:
// auto i = static_cast<int>(e);
// ~~~~~~~~~~~~~~~~
// ^ bugprone: use std::to_underlying
// Fix:
auto i = std::to_underlying(e);
return 0;
}
```
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