| Issue |
163517
|
| Summary |
[clang] New error in clang21, in-class initializer for static data member is not a constant _expression_
|
| Labels |
clang
|
| Assignees |
|
| Reporter |
lingege321
|
Hi experts,
I'm updating the clang version from 20 to 21 and see the new error in my project.
The error is introduced from a third-party library and I reduce the code size to a minimum issue.
Please check the compiler-explorer, https://godbolt.org/z/x73rfhWfW
Seems that static member variable must be a constant _expression_.
However, in this case, `type(BOUND+1)` is not a constant _expression_ in clang21 but I think it should be considered as a constant _expression_.
I have some workaround for it but I don't want to do that because it's a third party library.
Is it possible to support this code?
```
struct Test {
enum type {
Type1,
BOUND
};
static const type binding_required = BOUND;
static const type binding_completed = type(BOUND+1);
static const type detached = type(binding_completed+1);
static const type dying = type(detached+1);
};
```
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