/// <summary>
/// Map the input of the decoder.
/// </summary>
public static Decoder <TRaw2, T> Contramap <TRaw1, T, TRaw2>(
this Decoder <TRaw1, T> decoder,
[NotNull] Func <TRaw2, TRaw1> f)
{
return(decoder.Dimap(f, x => x));
}
/// <summary>
/// Map the output of the decoder.
/// </summary>
public static Decoder <TRaw, T2> Map <TRaw, T1, T2>(
this Decoder <TRaw, T1> decoder,
[NotNull] Func <T1, T2> f)
{
return(decoder.Dimap <TRaw, T1, TRaw, T2>(x => x, f));
}