https://llvm.org/bugs/show_bug.cgi?id=25288
Bug ID: 25288
Summary: bug with variadic class friend functions
Product: clang
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: C++14
Assignee: unassignedclangb...@nondot.org
Reporter: ryan.b...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
The below code compiles fine with gcc and EDG, but gives this error with clang:
rnburn@localhost ~/test/friend_auto $ c++14 t.cpp
t.cpp:18:3: error: call to 'f' is ambiguous
f(a);
^
t.cpp:6:15: note: candidate function [with Qx = <int, double>]
friend auto f(A<Qx...> a);
^
t.cpp:12:6: note: candidate function [with Qx = <int, double>]
auto f(A<Qx...> a) {
^
1 error generated.
///////////////////////////////////////////////////////////////
template<class... Tx>
class A {
public:
A(int xx) : x(xx) {}
template<class... Qx>
friend auto f(A<Qx...> a);
private:
int x;
};
template<class... Qx>
auto f(A<Qx...> a) {
return a.x;
}
int main() {
A<int, double> a(22);
f(a);
return 0;
}
///////////////////////////////////////////////////////////////
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