Let's say I would like to create a macro of this kind:
m(1, k) would produce:
match(k)
{
| 1 => 2
| _ => 0
}
m(2, k) would produce:
match(k)
{
| 1 => 2
| 2 => 3
| _ => 0
}
and so on. Although construction like <[ $i => $(i + 1) ]> for the possible match is accepted, I do not know how to create match expression consisting of these. The example is of course contrived ;)
public macro m(to, k)
{
def toInteger(literal)
{
| <[ $(i : int) ]> => i
| _ => Message.Error(literal.Location, $"'$literal' integer literal expected"); 0;
}
def to = toInteger(to);
def createCases(i)
{
| i when (i > 0) => <[case: | $i => $(i + 1) ]> :: createCases(i - 1);
| _ => [ <[case: | _ => 0 ]> ]
}
<[
match ($k)
{
..$(createCases(to))
}
]>
}