std::pair iterator without default constructor

Question

I have an std::map mapping to objects which don't have default constructors. I need an iterator to iterate over the map, but the iterator needs a default constructor, how do I solve this?

std::map<MyClass1, MyClass2> MyMap; //No default constructor needed
std::pair<MyClass1, MyClass2> MapIterator; //Need default constructor to construct std::pair

Um, a map iterator is not simply a pair. I think you need `std::map::iterator` or `std::map::const_iterator`. — Fred Larson, Apr 29 '13 at 13:57
Why are you explicitly trying to construct an iterator? You could just use std::map::iterator. — rohitsan, Apr 29 '13 at 13:57

score 3 · Accepted Answer · answered Apr 29 '13 at 13:58

3

Why do you think a pair is a map iterator? In your case a std::map<MyClass1, MyClass2>::iterator is a map iterator. And it is default constructible.

answered Apr 29 '13 at 13:58

David

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std::pair iterator without default constructor

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