Using Concepts to Constrain Auto Parameters

Learn to simplify function template syntax and employ concepts to constrain the template arguments.

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In the “Template Fundamentals” section, we discussed generic lambdas, introduced in C++14, as well as lambda templates, introduced in C++20. A lambda that uses the auto specifier for at least one parameter is called a generic lambda. The function object generated by the compiler will have a templated call operator. Here’s an example to refresh our memory:

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