Macro match_t 

match_t!() { /* proc-macro */ }

Pattern match on trait objects based on their concrete types. It supports both reference (&dyn Trait) and boxed (Box<dyn Trait>) trait objects.

Use move keyword to indicate ownership transfer when matching on Box<dyn Trait>.

Example

type_enum! {
    enum Tree<T: Display> {
        Leaf(T),
        Node(Box<Tree<T>>, Box<Tree<T>>),
    }
}

let tree: Box<dyn Tree<i32>> = Box::new(...);
let tree_ref: &dyn Tree<i32> = &...;
let describe = match_t! {
    move tree {
        Leaf(value) => format!("Leaf: {}", value),
        Node(left, right) => format!("Node with left and right"),
    }
}
let describe_ref = match_t! {
    tree_ref {
        Leaf(value) => format!("Leaf: {}", value),
        Node(left, right) => format!("Node with left and right"),
    }
}