Generic non nullable argument

main.dart

void main() {
  T nonNullableGeneric<T>(T value) {
    if(value == null) {
      throw 'This is null';
    }

    return value;
  }

  nonNullableGeneric(1); // Works fine
  
  nonNullableGeneric(null); // Works fine BUT I would like that the type inference would not allow a nullable value

  // Now this works as expected:
  // "the argument type 'Null' can't be assigned to the parameter type 'int'."
  // 
  // ... but I have to specify the type `T`, which is not clear given my function signature, that clearly
  // requires a non-nullable value of type `T`
  nonNullableGeneric<int>(null);
  
  // How can I make the following call:
  // nonNullableGeneric(null)
  // to throw me something like "the argument type 'Null' can't be assigned to a parameter type 'T'."?
}

Solved by just extending the T argument with Object.

void main() {
  T nonNullableGeneric<T extends Object>(T value) {
    return value;
  }

  nonNullableGeneric(1); // Works fine
   
  // Throws a:
  // Couldn't infer type parameter 'T'. Tried to infer 'Null' for 'T' which doesn't work: Type parameter 'T' declared to extend 'Object'.
  // The type 'Null' was inferred from: Parameter 'value' declared as 'T' but argument is 'Null'.
  // Consider passing explicit type argument(s) to the generic
  nonNullableGeneric(null);
}