default = {"gcc": _gcc_cppstd_default(compiler_version),
               "clang": _clang_cppstd_default(compiler_version),
               "apple-clang": "gnu98",
               # Confirmed in apple-clang 9.1 with a simple "auto i=1;"; 14.0 still the same
               "Visual Studio": _visual_cppstd_default(compiler_version),