array_lit

Macro vec

Source 
macro_rules! vec {
    [$item:expr ; $len:expr ; { $( $index:tt : $value:expr ),* $(,)? }] => { ... };
    [$item:expr ; $len:expr] => { ... };
    [$( $item:expr ),* $(,)?] => { ... };
}
Expand description

A macro for Vec literals with superpowers.

See the module level documentation for more.

This macro requires the std feature (enabled by default)

ยงExample

 let a = vec![1; 5; { [0]: [1, 2], 4: 0 }];
 assert_eq!(a, std::vec![1, 2, 1, 1, 0]);