`<stdalign.h>`

[added with C++11]

Include the standard header <stdalign.h> to define two macros. The standard header <stdalign.h> is available even in a freestanding implementation.

    /* MACROS */
#define alignas _Alignas [keyword in C++]
#define __alignas_is_defined 1

`__alignas_is_defined`

#define __alignas_is_defined 1

The macro yields the decimal constant 1.

`alignas`

#define alignas _Alignas [keyword in C++]

The macro expands to _Alignas.

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