Namespaces are permitted to be nested

[ericlippert]

In chapter 20, Namespaces, we have the line

"The declaration-list must not contain a namespace-definition."

indicating that namespace declarations of the form

namespace foo {
namespace bar { }
}

are illegal.

This is incorrect; nested namespaces in this form are legal.

The text which says that you cannot mix the "namespace foo { ... } " form with the "namespace bar;" form is correct.