| Issue |
176877
|
| Summary |
PR #174619 breaks valid code: `no member named 'value' in 'std::is_copy_constructible<Foo>'`
|
| Labels |
libc++,
rejects-valid
|
| Assignees |
philnik777
|
| Reporter |
alexfh
|
The following code (https://gcc.godbolt.org/z/YEsedh1Pn) is broken by https://github.com/llvm/llvm-project/pull/174619:
```
#include <any>
struct Foo {
Foo(std::any v);
};
template <typename T, bool = std::is_copy_constructible<T>::value>
void f(T) {}
void q(Foo x) { f(x); }
```
The code compiles fine with libc++ prior to that change and with libstdc++. The issue was reported last week at https://github.com/llvm/llvm-project/pull/174619#issuecomment-3753720486
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