#[macro_export]
macro_rules! derive_for {
(($b:ident $(,$a:ident)*) $vis:vis struct $name:ident($($fields:tt)*); $($rest:tt)*) => {
#[derive($($a,)* $b)]
$vis struct $name($($fields)*);
$crate::derive_for!( ($b, $($a,)*) $($rest)*);
};
(($b:ident $(,$a:ident)*,) $vis:vis struct $name:ident($($fields:tt)*); $($rest:tt)*) => {
#[derive($($a,)* $b)]
$vis struct $name($($fields)*);
$crate::derive_for!( ($b, $($a,)*) $($rest)*);
};
(($b:ident $(,$a:ident)*) $vis:vis struct $name:ident{ $($fields:tt)* }; $($rest:tt)*) => {
#[derive($($a,)* $b)]
$vis struct $name{ $($fields)* }
$crate::derive_for!( ($b, $($a,)*) $($rest)*);
};
(($b:ident $(,$a:ident)*,) $vis:vis struct $name:ident{ $($fields:tt)* }; $($rest:tt)*) => {
#[derive($($a,)* $b)]
$vis struct $name{ $($fields)* }
$crate::derive_for!( ($b, $($a,)*) $($rest)*);
};
(($($_:ident,)*)) => {};
}
#[cfg(test)]
#[macro_use]
mod tests {
use crate::derive_for;
derive_for!(
( Clone, Debug, PartialEq, Eq)
pub struct Foo{a: i32, name: String};
pub struct Bar(u32, u32);
);
#[test]
pub fn test() {
let foo = Foo {
a: 5,
name: "Hello".into(),
};
let bar = Bar(3, 6);
println!("{:?}, {:?}", foo, bar);
assert_eq!(
foo,
Foo {
a: 5,
name: "Hello".into()
}
);
assert_eq!(bar, Bar(3, 6));
assert_eq!(foo, foo.clone());
assert_eq!(bar, bar.clone());
}
}