https://llvm.org/bugs/show_bug.cgi?id=27544
Bug ID: 27544
Summary: defined template friend is 'sometimes' not defined -
std::experimental::any
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: unassignedclangb...@nondot.org
Reporter: eyen...@gmail.com
CC: dgre...@apple.com, llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 16276
--> https://llvm.org/bugs/attachment.cgi?id=16276&action=edit
Minimal broken example
Hello,
Today I tried clang 3.7.1 and 3.9.0 (trunk) with the std::experimental::any
implementation. I reduced the bug to the following (also attached):
class foo {
public:
template <typename T>
friend void gun(foo&) {
}
template <typename T>
friend void gun2(foo&) {
}
};
// error: redefinition of 'gun'
// template <typename T>
// void gun(foo&) {
// }
// error: redefinition of 'gun2'
// template <typename T>
// void gun2(foo&) {
// }
template <typename T>
void fun() noexcept {
foo f;
// no template named 'gun'; did you mean 'fun'?
gun<T>(f);
// error: no template named 'gun2'; did you mean 'gun'?
// 'T' does not refer to a value
gun2<T>(f);
}
int main(int, char const* []) {
fun<void>();
return 0;
}
In the case of std::experimental::any fun is any_cast and gun is __any_cast.
The headers of gcc 5.3.0 were used -- gcc has no problems with the code above.
I hope I got all the information you'll need to figure out this strange bug.
Thank you for your hard work! :)
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