Annex C (informative) Compatibility [diff]

C.6 C standard library [diff.library]

C.6.2 Modifications to definitions [diff.mods.to.definitions]

C.6.2.5 Header <stdalign.h> [diff.header.stdalign.h]

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The token alignas is a keyword in this International Standard ([lex.key]), and is not introduced as a macro by <stdalign.h> ([depr.stdalign.h.syn]).