How do namespaces compare to access modifiers (public, private, protected) for controlling visibility? What are some common design patterns that heavily utilize namespaces?

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what does using namespace std do Informational

• What are some examples of sub-namespaces in the C++ standard library?
• What are some resource constraints related to namespace usage in IoT devices? How do namespaces relate to the development of blockchain applications in C++?
• How do namespaces in C++ compare to modules or packages in other systems programming languages (e.g., Rust)? What are the trade-offs between using namespaces and other modularity mechanisms in C++?
• Are there any known bugs or quirks related to namespace implementations in different compilers?
• Can namespaces be used to manage different sensor inputs or rendering engines?
• Can you provide an example of using the scope resolution operator with namespaces?
• How do modules affect compilation time and linking?
• When might we want to use a namespace alias? Are there anonymous namespaces in C++?
• How can we ensure backward compatibility when introducing or modifying namespaces in a library?
• Can we use namespaces to create internal implementation details that are not exposed to users?