http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58156
Bug ID: 58156
Summary: c++11 bogus ambigous overload with variadic template
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ppluzhnikov at google dot com
Google ref b/10321377
/// --- cut ---
template <class T, class... U>
void Foo(U&...) {}
template <class T, class... U>
void Foo(const U&...) {}
void Bar() {
const int a = 0;
Foo<int>(a);
}
/// --- cut ---
The test compiles with Clang, errors with current trunk GCC:
g++ (GCC) 4.9.0 20130814 (experimental)
g++ -c t.cc -std=c++11
t.cc: In function ‘void Bar()’:
t.cc:9:14: error: call of overloaded ‘Foo(const int&)’ is ambiguous
Foo<int>(a);
^
t.cc:9:14: note: candidates are:
t.cc:2:7: note: void Foo(U& ...) [with T = int; U = {const int}]
void Foo(U&...) {}
^
t.cc:5:7: note: void Foo(const U& ...) [with T = int; U = {int}]
void Foo(const U&...) {}
^
Also broken with gcc-4.7.
