CODEWITHSUNDEEP
operator-overloadingdart
Daniel Robinson
Daniel Robinson

Reputation: 14848

dart, overloading [] operator?

Is it possible to overload the index[] syntax for a collection/iterable type? for example I am writing a SortedList<T> class that wraps around a standard List<T>. and I'd just like to pass on the usage from my sorted list straight down to the underlying list object. I thought I'd read about this on the dart language tour but I can't find it now.

Upvotes: 38

Views: 13106

Answers (2)

Onurcan Ari
Onurcan Ari

Reputation: 101

Yes you can override operators. Like this:

T operator [](int index) => items[index];

But you can't overload anything in dart. Because Dart does not support operator or function overloading. That means your class can't have two function with same name but different parameters.

Upvotes: 9

Daniel Robinson
Daniel Robinson

Reputation: 14848

Dart editor seems pretty happy with:

operator [](int i) => list[i]; // get
operator []=(int i, int value) => _list[i] = value; // set

Try it in DartPad

Upvotes: 66

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