#![allow(unused_mut)]
fn main() {
let mut count = 0;
#[cfg(feature = "fortress")]
{
count += 1;
}
#[cfg(feature = "garden")]
{
count += 1;
}
#[cfg(feature = "harmonic")]
{
count += 1;
}
if count >= 2 {
panic!("Only one of the following features can be enabled: fortress, garden, harmonic");
}
}