My proposals for the C++ standard ✔ P2291 Add Constexpr Modifiers to Functions to_chars and from_chars for Integral Types P2291 Proof of concept ✔ P2417 A more constexpr bitset P2417 Proof of concept ♻ P1944 Add Constexpr Modifiers to Functions in <cstring> and <cwchar> Headers P1944 Proof of concept ♻ P1990 Add operator[] to std::initializer_list P1990 ⌛ P2010 Remove iostream operators from P1889 P2010