More namespaces

Lecture 3 - Slide 23 : 27

More namespaces

Other namespace characteristics

A namespace is open
- A single namespace N can span several source files
- For instance namespace N {...} forms in two or more header files
Namespaces can be nested
There is a global namespace
- Access to name in the global namespace: ::name
Unnamed namespaces
- Used in C++ to make names local to a compilation unit (internal linkage, next slide)

Illustrating that a namespace interface is separated from the namespace implementation.

The syntactic namespace form is intended for declarations, not full definitions

This separates the namespace interface from the namespace implementation

The same holds for classes and structs