(std::to_underlying(E2::e))>); enum E3 : unsigned { e }; static_assert(std::is_same_v<unsigned, decltype(std::to_underlying(e))>); int main() { enum class ColorMask : std::uint32_t { red = 0xFF, green = (red << 8), blue = (green << 8), alpha = (blue << 8)...
is_enum (C++11) checks if a type is an enumeration type (class template) is_scoped_enum (C++23) checks if a type is a scoped enumeration type (class template) to_underlying (C++23) converts an enumeration to its underlying type
structX{enumdirection{left='l', right='r'};};X x;X*p=&x;inta=X::direction::left;// C++11 开始才能用intb=X::left;intc=x.left;intd=p->left; 在成员声明的声明说明符中,以下序列 enum枚举头名: 只能被解析成枚举声明的一部分:
这一点可以使用C++11的std::is_enum,std::underlying_type来解决: template<class T, bool isEnum = std::is_enum<std::decay_t<T>>::value> struct lua_io_dispatcher { //… }; 而后增加一组模板特化: template<class T> struct lua_io_dispatcher<T, true> { using _UType = typename std::u...
is_scoped_enum(检查类型是否为有作用域枚举类型) Defined in header<utility> to_underlying(转换枚举到其底层类型) Defined in header<stacktrace> stacktrace_entry(栈踪中求值的表示) basic_stacktrace(由栈踪条目组成的调用序列的近似表示) 动态内存管理 Defined in header<memory> out_ptr_t(与外来指针设置...
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underlying_enums_v.hpp /usr/include/rfl/internal/is_validator.hpp /usr/include/rfl/internal/is_variant.hpp /usr/include/rfl/internal/lit_name.hpp /usr/include/rfl/internal/make_tag.hpp /usr/include/rfl/internal/move_and_flatten_field_tuple.hpp /usr/include/rfl/internal/move_field_tuple_to...
(202102L, __cpp_lib_to_underlying) COMPILER_FEATURE_ENTRY(202207L, __cpp_lib_tuple_like) COMPILER_FEATURE_ENTRY(202202L, __cpp_lib_unreachable) }; static constexpr CompilerFeature cxx26_core[] = { //< Continue to Populate COMPILER_FEATURE_ENTRY(202406L, __cpp_constexpr) COMPILER_...
-Wassign-enum integer constant not in range of enumerated type %0 -Watomic-property-with-user-defined-accessor writable atomic property %0 cannot pair a synthesized %select{getter|setter}1 with a user defined %select{getter|setter}2 -Wattributes unknown attribute %0 ignored ...
This API was introduced in Visual Studio 14 Update 2 (DkmApiVersion.VS14Update2). C++複製 publicrefclassDkmNativeCppEnumType:Microsoft::VisualStudio::Debugger::Native::Cpp::DkmNativeCppType Attributes GuidAttribute Applies to 產品版本 Visual Studio SDK2015, 2017, 2019, 2022...