https://llvm.org/bugs/show_bug.cgi?id=26962
Bug ID: 26962
Summary: Default template arguments and friend declarations
don't mix
Product: clang
Version: 3.8
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: C++11
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected]
Classification: Unclassified
This is very funny behavior:
- If I call a function template once everything compiles.
- If I call the same function template in exactly the same way twice, clang
does not compile it.
Here's a very small code sample that shows the behavior:
#include <memory>
namespace hydi {
template<int>
class A
{
template<class T>
friend std::shared_ptr<A<0>> foo();
};
template<class T=double>
std::shared_ptr<A<0>> foo() {}
} // end namespace hydi
int main() {
*hydi::foo();
*hydi::foo(); // if this line is commented, everything works!
}
Compile it with: clang++ main.cpp -std=c++11
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