Macro tree_with

macro_rules! tree_with {
    ($($tt:tt)*) => { ... };
}

Helper macro for building a tree in place with a custom span.

Examples

use syntree::{Empty, EmptyVec, Tree, TreeIndex};

syntree::flavor! {
    struct FlavorEmpty {
        type Index = Empty;
        type Indexes = EmptyVec<TreeIndex<Self>>;
    }
};

let tree: Tree<_, FlavorEmpty> = syntree::tree_with! {
    "root" => {
        "child" => {
            "token"
        },
        "child2"
    }
};

let expected: Tree<_, FlavorEmpty> = syntree::tree_with! {
    "root" => {
        "child" => {
            ("token", Empty)
        },
        "child2"
    }
};

assert_eq!(tree, expected);