https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67835
Bug ID: 67835
Summary: bug with auto-deduced return type and functions
invoked via ADL
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: major
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ryan.burn at gmail dot com
Target Milestone: ---
The below code compiles fine with clang and EDG (intel's compiler) but gives
this error with gcc:
t.cpp: In instantiation of ‘auto g(Tag, T) [with Tag = abc::tag; T = abc::A]’:
t.cpp:16:25: required from here
t.cpp:3:11: error: use of ‘template<class T> auto abc::f(abc::tag, T)’ before
deduction of ‘auto’
return f(tag, x);
^
t.cpp:3:11: error: use of ‘auto abc::f(abc::tag, T) [with T = abc::A]’ before
deduction of ‘auto’
/////////////////////////////////////////////////////////////
template<class Tag, class T>
auto g(Tag tag, T x) {
return f(tag, x);
}
namespace abc {
struct tag {};
struct A {};
template<class T>
auto f(tag, T x) { return x; }
}
int main() {
g(abc::tag(), abc::A());
return 0;
}
/////////////////////////////////////////////////////////////
