public static ICommandLineInstruction <R> MapI <T, R>(this ICommandLineInstruction <T> instruction, Func <T, R> f)
{
Func <ReadLine <T>, Func <T, R>, ReadLine <R> > mapM1 = (m1, g) =>
{
(var data, var f) = m1;
return(new ReadLine <R>(data, x => g(f(x))));
};
Func <WriteLine <T>, Func <T, R>, WriteLine <R> > mapM2 = (m2, g) =>
{
(var data, var f) = m2;
return(new WriteLine <R>(data, x => g(f(x))));
};
return(instruction switch
{
ReadLine <T> m1 => mapM1(m1, f),
WriteLine <T> m2 => mapM2(m2, f),
_ => default
});
public static void Deconstruct <T>(this WriteLine <T> writeLine, out string text, out Func <string, T> fn)
{
text = writeLine.Text;
fn = writeLine.Fn;
}