rust-ape-example/src/bin/macros_overload.rs

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// ./src/macros/overload.md
// `test!` will compare `$left` and `$right`
// in different ways depending on how you invoke it:
macro_rules! test {
// Arguments don't need to be separated by a comma.
// Any template can be used!
($left:expr; and $right:expr) => {
println!("{:?} and {:?} is {:?}",
stringify!($left),
stringify!($right),
$left && $right)
};
// ^ each arm must end with a semicolon.
($left:expr; or $right:expr) => {
println!("{:?} or {:?} is {:?}",
stringify!($left),
stringify!($right),
$left || $right)
};
}
fn part0() {
test!(1i32 + 1 == 2i32; and 2i32 * 2 == 4i32);
test!(true; or false);
}
pub fn main() {
part0();
}