Need iterator when using ranged-based for loops

Question

Currently, I can only do ranged based loops with this:

for (auto& value : values) 

But sometimes I need an iterator to the value, instead of a reference (For whatever reason). Is there any method without having to go through the whole vector comparing values?

Answer 1

Use the old for loop as:

for (auto it = values.begin(); it != values.end();  ++it ) {        auto & value = *it;        //... } 

With this, you've value as well as iterator it. Use whatever you want to use.

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EDIT:

Although I wouldn't recommended this, but if you want to use range-based for loop (yeah, For whatever reason :D), then you can do this:

 auto it = std::begin(values); //std::begin is a free function in C++11  for (auto& value : values)  {      //Use value or it - whatever you need!      //...      ++it; //at the end OR make sure you do this in each iteration  } 

This approach avoids searching given value, since value and it are always in sync.