What is the usage of const in C++ templates?

Can you explain the usage of const in C++ templates?

Sure! In C++ templates, 'const' is used to define constant values that cannot be modified. It helps in ensuring that the template parameters remain unchanged.

Can you give me an example of how to use const in a template?

Absolutely! Here's a simple example:

template <const int N>
void printValue() {
    std::cout << N << std::endl;
}

In this case, 'N' is a constant template parameter.

What are the benefits of using const in templates?

Using 'const' in templates can improve code safety by preventing unintended modifications and can also enable certain optimizations by the compiler.

Are there any limitations when using const in templates?

Yes, one limitation is that the value of a const template parameter must be known at compile time, which can restrict its use in some scenarios.