609 B
609 B
[macro.names]
16 Library introduction [library]
16.4 Library-wide requirements [requirements]
16.4.5 Constraints on programs [constraints]
16.4.5.3 Reserved names [reserved.names]
16.4.5.3.3 Macro names [macro.names]
A translation unit that includes a standard library header shall not#define or #undef names declared in any standard library header.