Uniontypes

For those libraries that return one thing or another. Similar to Union types in Typescript.

Installation

haxelib install uniontypes

Usage

final x : Union<Int, String> = "A string";

switch x.type() {
    case Int(i): trace('It was an Int: $i');
    case String(s): trace('It was a String: ${s.toUpperCase()}');
    case Null: trace('It was null');
}

The Union type is for two types, but the library also includes Union3, Union4, Union5 and Union6 for more extreme cases.

To trust, or not to trust

Depending on how much you trust the data in the union, you can specify different types of unions:

• Union.TrustedUnion assumes a value will never be null, meaning a Null enum constructor will not exist.
• Union.UntrustedUnion includes both a Null and an Unknown(u : Dynamic) enum constructor.