CODEWITHSUNDEEP
genericsdart
Bluenuance
Bluenuance

Reputation: 629

constructor with generic parameters

since recently it is possible to create methods with generic methods e.g.:

class Grid2<T> {
  static Grid2<T> fromLanes<L, T>(List<L> lanes, T generator(L element, int x, int z)) {
    ...
  }
}

but it would be way nicer to have the same as a named constructor like this (syntax failure) - is this possible?

class Grid2<T>
  Grid2.fromLanes<L>(List<L> lanes, T generator(L element, int x, int z)) {
    ...
  }
}

Upvotes: 2

Views: 2348

Answers (2)

Rishab Jain
Rishab Jain

Reputation: 299

class ArrayList1<T> {
  T name;
  ArrayList1(T name) {
  this.name = name;
  }
}

void main() {
  ArrayList1<String> obj = new ArrayList1<String>("hello");
  print(obj.name);
}

Upvotes: 0

G&#252;nter Z&#246;chbauer
G&#252;nter Z&#246;chbauer

Reputation: 657338

This is currently not supported, but there is an open issue with some discussion

Support generic arguments for (named) constructors https://github.com/dart-lang/sdk/issues/26391

Upvotes: 5

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