16 Library introduction [library]

16.5 Library-wide requirements [requirements]

16.5.4 Constraints on programs [constraints]

16.5.4.3 Reserved names [reserved.names]

16.5.4.3.1 Zombie names [zombie.names]

In namespace std, the following names are reserved for previous standardization:
The following names are reserved as member types for previous standardization, and may not be used as a name for object-like macros in portable code:
The name stossc is reserved as a member function for previous standardization, and may not be used as a name for function-like macros in portable code.
The header names <ccomplex>, <ciso646>, <cstdalign>, <cstdbool>, and <ctgmath> are reserved for previous standardization.