40. Namespace Alias Usage

#include <iostream>
using namespace std;

// Long vendor HAL namespace
namespace VendorMegaChipCorporationUltraSeries9000_HardwareClockControlModule {
    void enableClock()  { cout << "CLOCK ENABLED"; }
    void disableClock() { cout << "CLOCK DISABLED"; }
}

// Alias to shorten usage
namespace ClockHAL = VendorMegaChipCorporationUltraSeries9000_HardwareClockControlModule;

int main() {
    int cmd;
    cin >> cmd;

    if (cmd == 1) {
        VendorMegaChipCorporationUltraSeries9000_HardwareClockControlModule::enableClock();
    }
    else if (cmd == 2) {
        ClockHAL::disableClock();
    }

    return 0;
}

Explanation & Logic Summary:

• A long vendor-provided namespace is preserved as-is.
• A namespace alias (ClockHAL) is created to improve readability.
• Based on the command input:
  • The full namespace is used directly for one operation.
  • The alias is used for the other operation.
• This demonstrates correct and practical use of namespace aliasing in C++.

Firmware Relevance & Real-World Context:

• Embedded SDKs and HALs often expose deeply nested or verbose namespaces.
• Namespace aliases help reduce verbosity without sacrificing clarity or safety.
• This pattern is common in firmware projects involving vendor drivers, BSPs, and RTOS-based systems.