Standard library header <cstddef>

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C++
Standard library headers

This header was originally in the C standard library as <stddef.h> .

This header is part of the utility library.

Macros

implementation-defined null pointer constant
(macro constant)
byte offset from the beginning of a standard-layout type to specified member
(function macro)

Types

unsigned integer type returned by the sizeof operator
(typedef)
signed integer type returned when subtracting two pointers
(typedef)
(C++11)
the type of the null pointer literal nullptr
(typedef)
(C++11)
trivial type with alignment requirement as great as any other scalar type
(typedef)
(C++17)
the byte type
(enum)

Functions

(C++17)
convert std::byte to integer
(function template)

Synopsis 

namespace std {
  using ptrdiff_t = /* see description */;
  using size_t = /* see description */;
  using max_align_t = /* see description */;
  using nullptr_t = decltype(nullptr);
 
  enum class byte : unsigned char {};
 
  // byte type operations
  template<class IntType>
    constexpr byte& operator<<=(byte& b, IntType shift) noexcept;
  template<class IntType>
    constexpr byte operator<<(byte b, IntType shift) noexcept;
  template<class IntType>
    constexpr byte& operator>>=(byte& b, IntType shift) noexcept;
  template<class IntType>
    constexpr byte operator>>(byte b, IntType shift) noexcept;
  constexpr byte& operator|=(byte& l, byte r) noexcept;
  constexpr byte operator|(byte l, byte r) noexcept;
  constexpr byte& operator&=(byte& l, byte r) noexcept;
  constexpr byte operator&(byte l, byte r) noexcept;
  constexpr byte& operator^=(byte& l, byte r) noexcept;
  constexpr byte operator^(byte l, byte r) noexcept;
  constexpr byte operator~(byte b) noexcept;
  template<class IntType>
    constexpr IntType to_integer(byte b) noexcept;
}
 
#define NULL /* see description */
#define offsetof(P, D) /* see description */

Notes

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