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C++ Concepts: Improve Type Safety with C++ 20

An Alias Template Specialization

Explore how to create and use alias template specializations within C++20 Concepts to enforce type requirements. Understand how constraints validate template parameters and improve error clarity when types do not meet specified conditions.

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Create a template alias

To show that a concept can be used to make sure that an alias template specialization names a type, let’s create a template alias, ValueTypeOf:

template<typename T> using ValueTypeOf = T::value_type;

Let’s use it in the concept TypeRequirement:

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