C++

13    Namespaces and Qualifiers

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• namespaceIntroduces a new namespace, either named or anonymous.

• namespace stdIn the std namespace, you will find all the identifiers of the standard library.

• staticMarks a variable, function, or method as file-local, shared, or persistent.

• SingletonPopular design pattern in which only one instance of a type exists at most.

• constMarks something as immutable at runtime.

• constexprMarks a constant or function as computable at compile time.

• constevalLets the compiler guarantee that a function is computable at compile time.

• Const-correctnessBy using const on types, you can get help from the compiler in uncovering some typical errors.

• Type safetyThe correct use of types, including ...