Annex C (informative) Compatibility [diff]

C.6 C standard library [diff.library]

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

C.6.2.6 Header <stdbool.h> [diff.header.stdbool.h]

The tokens bool, true, and false are keywords in this International Standard.
They do not appear as macro names defined in <cstdbool> ([depr.cstdbool.syn]).