c++17

replacement for std::binary_function

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First, my advice is to watch CppCon 2015: Stephan T. Lavavej “functional: What’s New, And Proper Usage”. std::binary_function is mentioned on slide 36, at around 36 mins in the video. You can find the slides at github.com/CppCon/CppCon2015). It doesn’t go into detail why you shouldn’t use std::binary_function, but if you’re using something that’s been deprecated … Read more

Why is there no implicit conversion from std::string_view to std::string?

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The problem is that std::string_view -> std::string makes a copy of the underlying memory, complete with heap allocation, whereas the implicit std::string -> std::string_view does not. If you’ve bothered to use a std::string_view in the first place then you obviously care about copies, so you don’t want one to happen implicitly. Consider this example: void … Read more

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