https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84849
Bug ID: 84849
Summary: Ambiguous resolution of braze initializer list to a
class with explicit copy/move constructors
Product: gcc
Version: 7.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: jose.dapena at lge dot com
Target Milestone: ---
Created attachment 43644
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43644&action=edit
Test case
For a template class with explicit copy and move constructors, passing a
std::vector of std::string using initializer list syntax fails because of geing
ambiguous.
Attached test example.
main.cc: In function ‘int main(int, char**)’:
main.cc:22:62: error: call of overloaded ‘Foo(<brace-enclosed initializer
list>)’ is ambiguous
static Foo<std::vector<std::string>> vector({"a", "b", "c"});
^
main.cc:14:3: note: candidate: Foo<T>::Foo(const Foo<T>&) [with T =
std::vector<std::__cxx11::basic_string<char> >] <deleted>
Foo(const Foo&) = delete;
^~~
main.cc:12:12: note: candidate: Foo<T>::Foo(T&&) [with T =
std::vector<std::__cxx11::basic_string<char> >]
explicit Foo(T&& x) { }
^~~
main.cc:11:12: note: candidate: Foo<T>::Foo(const T&) [with T =
std::vector<std::__cxx11::basic_string<char> >]
explicit Foo(const T& x) { }
This test case works properly on clang (it resolves to the move constructor.
