TLS verification with openssl command

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openssl command to verify TLS connection

$ openssl s_client -state -CAfile root.ca.crt -connect igvita.com:443

C++ - auto as a non-type parameter in template

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C++17 and later: auto as a non-type template parameter

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std::type_identity_t was introduced in C++20. Main purpose of this type alias has the following reasons.

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C++20 introduced concept. The following code shows the example of using concept.

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C++ variadic template with lambda