macro_rules! vec { (in $alloc:expr $(;)?) => { ... }; (in $alloc:expr; $elem:expr; $n:expr) => { ... }; (in $alloc:expr; $($x:expr),+ $(,)?) => { ... }; () => { ... }; ($elem:expr; $n:expr) => { ... }; ($($x:expr),+ $(,)?) => { ... }; }
Expand description
Allocate a new Vec instance with optional initial items.