Does the 'auto' keyword know when to use a const iterator?
auto, c++, c++11, loops, vector
Solution
1) Use `cbegin` and `cend` to be explicit about using const iterator.
2) `begin()` and `end()` return `const_iterator` when method is declared as `const`
Problem
If you're looping through a container as such: ``` typedef std::vector<std::unique_ptr<BaseClass>> Container; Container container; for(Container::const_iterator element = container.begin(); element != container.end(); element++) { //Read through values } ``` And instead of using the typedef you decide to use auto: ``` std::vector<std::unique_ptr<BaseClass>> container; for(auto element = container.begin(); element != container.end(); element++) { //Read through values } ``` Assuming you don't alter the values, does the auto keyword use a const iterator over a non const one? This question is curiosity more than anything, the only reason I can see this being an applicable question in a real life scenario would be if you needed to communicate that you weren't to alter values to another person working on the code.