https://bugs.llvm.org/show_bug.cgi?id=41654
Bug ID: 41654
Summary: tuple_size cannot take reference types
Product: libc++
Version: unspecified
Hardware: Macintosh
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: z.zoel...@gmail.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
Take the following example:
int main()
{
auto t = std::make_tuple(make_tuple(10, 10));
const auto arg_count1 =
std::tuple_size<std::remove_reference_t<decltype(std::get<0>(t))>>::value; //
works
const auto arg_count2 =
std::tuple_size<decltype(std::get<0>(t))>::value; // fails
}
The above program generates the error: Implicit instantiation of undefined
template 'std::__1::tuple_size<std::__1::tuple<int, int> &>'
It errors because `std::get` returns a reference type.
--
You are receiving this mail because:
You are on the CC list for the bug._______________________________________________
llvm-bugs mailing list
llvm-bugs@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-bugs
