C++17 STL Cookbook

How it works...

We have just seen that we can call a function that accepts a string_view argument with basically anything that is string like in the sense that it stores characters in a contiguous way. No copy of the underlying string was made in any of our print calls.

It is interesting to note that in our print(argv[0]) call, the string view automatically determined the string length because this is a zero-terminated string by convention. The other way around, one cannot assume that it is possible to determine a string_view instances's data length by counting the number of items until a zero terminator is reached. Because of this, we must always be careful about where we reach around a pointer to the string view data using string_view::data() ...