From cppreference.com <c |language Declarations Pointer Array enum struct union Bit-field Atomic types(C11) const constexpr (C23) volatile restrict (C99) Alignment specifiers (C11) Storage duration and linkage External and tentative definitions ...
Because bit-fields do not necessarily begin at the beginning of a byte, address of a bit-field cannot be taken. Pointers and non-const references to bit-fields are not possible. Wheninitializing a const referencefrom a bit-field, a temporary is created (its type is the type of the bit-...
An unnamed bit field of width 0 forces alignment of the next bit field to the next type boundary, where type is the type of the member.The following example declares a structure that contains bit fields:C++ Copy // bit_fields1.cpp // compile with: /LD struct Date { unsigned short n...
// where "u" marks the unused :2 specified in the struct, and // "a" marks compiler-added padding to byte-align the next field. // Byte-alignment is happening because b2's type is declared unsigned char; // if b2 were declared uint16_t there would be no "a", b2 would abut "...
If the declaration of a structure includes an unnamed field of length 0, as shown in the following example: C++ // bit_fields2.cpp// compile with: /LDstructDate{unsignednWeekDay :3;// 0..7 (3 bits)unsignednMonthDay :6;// 0..31 (6 bits)unsigned:0;// Force alignment to next ...
If the declaration of a structure includes an unnamed field of length 0, as shown in the following example:C++ Kopiraj // bit_fields2.cpp // compile with: /LD struct Date { unsigned nWeekDay : 3; // 0..7 (3 bits) unsigned nMonthDay : 6; // 0..31 (6 bits) unsigned : 0...
An unnamed bit field of width 0 forces alignment of the next bit field to the next type boundary, where type is the type of the member.The following example declares a structure that contains bit fields:C++ Copy // bit_fields1.cpp // compile with: /LD struct Date { unsigned short n...
If the declaration of a structure includes an unnamed field of length 0, as shown in the following example:C++ Copy // bit_fields2.cpp // compile with: /LD struct Date { unsigned nWeekDay : 3; // 0..7 (3 bits) unsigned nMonthDay : 6; // 0..31 (6 bits) unsigned : 0; ...
If the declaration of a structure includes an unnamed field of length 0, as shown in the following example: C++ // bit_fields2.cpp// compile with: /LDstructDate{unsignednWeekDay :3;// 0..7 (3 bits)unsignednMonthDay :6;// 0..31 (6 bits)unsigned:0;// Force alignment to next ...
You can pass the entire bitfield to any function that expects auint32_t. In the GitHub project, they’re often passed to C++11 atomic operations. It even works by reference. m_status.store(status, std::memory_order_relaxed); m_status.compare_exchange_weak(oldStatus,newStatus, ...