macro_rules! v {
($value:literal) => { ... };
($key:literal => $value:literal) => { ... };
($name:expr, $value:expr) => { ... };
($name:expr) => { ... };
}
macro_rules! v {
($value:literal) => { ... };
($key:literal => $value:literal) => { ... };
($name:expr, $value:expr) => { ... };
($name:expr) => { ... };
}