C++ Standards Support in GCC - GCC 对 C++ 标准的支持

SD-6 Feature Test Default member initializers for bit-fields P0683R1 8 Fixing const-qualified pointers SD-6 Feature Test Removing trigraphs N4086 5 u8 character literals N4267 6 __cpp_unicode_characters SD-6 Feature Test Tweak to certain C++ contextual conversions N3323 4.9 Binary literals N3472 4.3 SD-6 Feature Test Runtime-sized arrays with automatic storage duration  (Removed from the standard) SD-6 Feature Test Rvalue references N2118 GCC 4.3 __cpp_rvalue_references >= 200610     Rvalue references