https://bugs.llvm.org/show_bug.cgi?id=43890
Bug ID: 43890
Summary: P0031 should apply to std::array<T, 0> as well
Product: libc++
Version: unspecified
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: unassignedclangb...@nondot.org
Reporter: jdoer...@google.com
CC: llvm-bugs@lists.llvm.org, mclow.li...@gmail.com
Currently std::array<T,0>'s member functions miss constexpr qualifications as
specified by https://wg21.link/p0031. This results in the following code being
invalid, while it's handled fine by libstdc++ [1]:
constexpr std::array<int, 0> a0 = {};
constexpr auto ptr0 = a0.data();
Fixing this might require compiler magic, as reinterpret_cast is no longer
valid in std::array<T,0>::data().
[1] https://godbolt.org/z/04eTaL
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