https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69623
Bug ID: 69623
Summary: CWG 1388; Invalid deduction of non-trailing template
parameter pack
Product: gcc
Version: 6.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: colu...@gmx-topmail.de
Target Milestone: ---
template <typename... T, typename... U>
void f(T..., U...) {}
int main() {f();}
---
This shouldn't compile. Although U is deduced to the empty pack via
[temp.arg.explicit]/3, T isn't, because it isn't trailing. I.e. this code
should yield a deduction failure.
Also see https://llvm.org/bugs/show_bug.cgi?id=26435.
