Function should include apply()

[gbracha]

The Function class should have a method

apply(ArgumentDescription args);

where

class ArgumentDescriptor {
  final List positionalArguments;
  final Map<String, dynamic> namedArguments;

  ArgumentDescriptor(List this.positionalArguments,
                     Map<String, dynamic> this.namedArguments);
}

Now that Function is a class, it would make sense to have Function contain an implementation.

Real functions need to have a magical apply() that takes the incoming formal parameter args, extracted the actual arguments from it and invoked the function. However, the Function class is presumably separate, and could define apply as:

apply(ArgumentDescription args) => this.call.apply(args);

 It would be quite reasonable for people to extend (not just implement) Function.

[gbracha]

See also https://www.dartlang.org/articles/emulating-functions/

[gbracha]

Current state of play is that Function includes a static method

apply(Function target, List positionalArguments, [Map<String, dynamic> namedArguments])

[floitschG]

Closing since all implementations now support the static apply function.

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Added Fixed label.