templates

Defining Concepts

I wrote a few posts about using concepts. Concepts are a named set of requirements. Let's define a few concepts in this post.

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Placeholders - The Second

The unification of templates, concepts, and placeholders goes on. This time, I will have a closer look at constrained (concepts) and unconstrained (auto) placeholders in the context of templates.

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Concepts - Placeholders

C++11 has with auto unconstrained placeholders. You can use concepts in C++20 as constrained placeholders. What seems at first glimpse not so thrilling is for me the decisive quantum leap. C++ templates will become an easy to use C++ feature.

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C++ is Lazy: CRTP

In my previous post Recursion, List Manipulation and Lazy Evaluation I wrote about the characteristics of functional programming:  The story about lazy evaluation in C++ is short. Sorry to say but I have forgotten templates. The two advanced techniques CRTP and expression templates are based on lazy evaluation.

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Concepts

We stay in the year 2020. With high probability we will get concepts. Of course, waterproof statements about the future are difficult but the statement is from Bjarne Stroustrup (Meeting C++ 2016 at Berlin).

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