; struct Token { int token_type, line, col, ~{}charp data } ;struct Node { Token # associated token to the node tok, ~{}Node # sub-nodes sub } ;{}charp cnull = "a" /; main [int] ;{}Node s = {} ;Node n = {{1, 2, 3, ~cnull}, ~s} ;s.append(n) ;tnsl.io.println(~s) ;tnsl.io.println(n.sub) ;return 0 ;/