Lambdas: From C++11 to C++20, Part 2

Since C++17, if possible, the standard defines for the lambda type implicitly as :

To recall, in C++17 a function has the following rules:

How about a more practical example? With C++20 we’ll get the following features:

In most of the cases the newly added features “cleanup” lambda use and they allow some advanced use cases. But if you call it with an parameter (like ) then you might get some hard-to-read error:

In C++20 we can write:

The above lambda resolves to a templated call operator:

The template parameter comes after the capture clause .

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