Standard library header <stdalign.h> (C11)(deprecated in C23)

This header is part of the types support library.

Macros
alignas (C11)(removed in C23)	convenience macro, expands to keyword _Alignas (keyword macro)
alignof (C11)(removed in C23)	convenience macro, expands to keyword _Alignof (keyword macro)
Constants
__alignas_is_defined (C11)(removed in C23)	expands to integer constant 1 (macro constant)
__alignof_is_defined (C11)(removed in C23)	expands to integer constant 1 (macro constant)

Synopsis

#if __STDC_VERSION__ < 202311L
#define alignas _Alignas
#define alignof _Alignof
#define __alignas_is_defined 1
#define __alignof_is_defined 1
#endif