| Issue |
75755
|
| Summary |
libc++: constexpr std::string does not work (clang 17)
|
| Labels |
clang,
libc++
|
| Assignees |
|
| Reporter |
q66
|
The following code:
```
#include <string>
constexpr std::string foo{"XX"};
int main() {
}
```
should compile, but instead it fails with:
```
test.cc:3:23: error: constexpr variable 'foo' must be initialized by a constant _expression_
3 | constexpr std::string foo{"XX"};
| ^~~~~~~~~
test.cc:3:23: note: pointer to subobject of heap-allocated object is not a constant _expression_
/usr/bin/../include/c++/v1/__memory/allocator.h:112:38: note: heap allocation performed here
112 | return static_cast<_Tp*>(::operator new(__n * sizeof(_Tp)));
| ^
1 error generated.
```
I haven't been able to find anything about this being broken, and available resources list the functionality as available since 15.
This is a musl/libc++/compiler-rt environment, on x86_64 architecture, but probably should not matter. The libc++ has hardened mode on.
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