[diff.cpp14.library] (original) (raw)

Affected subclause: [namespace.future]

Change: New reserved namespaces.

Rationale: Reserve namespaces for future revisions of the standard library that might otherwise be incompatible with existing programs.

Effect on original feature: The global namespaces stdfollowed by an arbitrary sequence of digits ([lex.name]) are reserved for future standardization.

Valid C++ 2014 code that uses such a top-level namespace, e.g., std2, may be invalid in this revision of C++.