https://bugs.llvm.org/show_bug.cgi?id=47449
Bug ID: 47449
Summary: std::tuple constructor template auto deduction fails
with a class F that has a ctor F(std::tuple<F>)
Product: libc++
Version: unspecified
Hardware: PC
OS: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: kirsha...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
struct F {
F() {}
F(const std::tuple<F>&) {}
};
int main() {
// ok: std::tuple<F>
std::tuple t1{F{}};
// ok: std::tuple<std::tuple<F>>
std::tuple<std::tuple<F>> t2 = std::make_tuple(t1);
// should be std::tuple<std::tuple<F>> but fails with stdlibc++
std::tuple t3 = std::make_tuple(t1);
}
// Code in compiler explorer: https://godbolt.org/z/qGrcav
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