mean-vans-behave

Added useValuesAsDiscriminators option to getEnumCodec

When dealing with numerical enums that have explicit values, you may now use the useValuesAsDiscriminators option to encode the value of the enum variant instead of its index.

enum Numbers {
    One,
    Five = 5,
    Six,
    Nine = 9,
}

const codec = getEnumCodec(Numbers, { useValuesAsDiscriminators: true });
codec.encode(Direction.One); // 0x00
codec.encode(Direction.Five); // 0x05
codec.encode(Direction.Six); // 0x06
codec.encode(Direction.Nine); // 0x09

Note that when using the useValuesAsDiscriminators option on an enum that contains a lexical value, an error will be thrown.

enum Lexical {
    One,
    Two = 'two',
}
getEnumCodec(Lexical, { useValuesAsDiscriminators: true }); // Throws an error.