| '"' { read_string (Ast.Substs.create ()) lexbuf }
| "{" { read_code (Ast.Substs.create ()) (ref 1) lexbuf }
| "goal" { GOAL }
| '"' { read_string (Ast.Substs.create ()) lexbuf }
| "{" { read_code (Ast.Substs.create ()) (ref 1) lexbuf }
| "goal" { GOAL }