{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"::tt::TokenTree::Leaf(::tt::Leaf::Punct(punct))"}]}
                ::tt::TokenTree::Leaf(::tt::Leaf::Punct(punct)) => {
            match x {
                    assert!(!matches!(punct.char, '{' | '}' | '(' | ')' | '[' | ']'))