411 REFERENCE · Wikibooks
C++ Language/Namespace/NamespaceShortcuts
Reference material by Wikibooks contributors. This retains its source identity and is not 411 news reporting.
Anything defined with namespace NRNamespace {...} will require additional qualification (writing variable giVarB as NRNamespace::giVarB) unless you have requested to skip that requirement on a case-by-case basis (programming using NRNamespace::giVarB;).
Or, the qualification requirement could be skipped for an entire namespace all at once.
Additional information about namespace shortcuts (includes interactive examples)