C++ Range based loop for reading a structure

Question

I have kinda simple question, but I couldn't find any specific answer to this. So the question is: Let's say I have a vector with a structures inside. From the searches I have found out, that when we are reading classes in a vector, we should use an const auto&, like this

for (const auto& Class : Classes)

and for something like DWORD vectors it doesn't matter, but my question is, does it make sense to use the const auto& while working with structures? They don't have a constructor, but when using just auto, it should make a copy and make the loop slower, or more unefficient, or not?

Ah I guess I'm retarded, I didn't realize that lol, sorry I guess — Martin Prince, Mar 23 '18 at 12:46
So, your question is "why should we use `const auto&` instead of `const auto` in a ranged loop?" — Bob__, Mar 23 '18 at 14:20

score 1 · Accepted Answer · answered Mar 23 '18 at 12:46

1

There is no such thing as a structure in C++.

Whether you write struct or class, you have created a class.

The classes created in both cases are equally capable of having a constructor.

So, yes. The advice is the same.

answered Mar 23 '18 at 12:46

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C++ Range based loop for reading a structure

1 Answers1