Haskell: A Tree ="IS" a Leaf |"OR" a Node In the Rust syntax ',' means both OR and AND. A Tree {"IS" a Leaf ,"OR" a Node A Node ("IS" an A ,"AND" a Box ,"AN

Haskell: A Tree ="IS" a Leaf |"OR" a Node In the Rust syntax ',' means both OR and AND. A Tree {"IS" a Leaf ,"OR" a Node A Node ("IS" an A ,"AND" a Box ,"AND" a Box.