1837
1837
| Ast.AFTER(a) -> (anythings@a,t)
1838
1838
| Ast.BEFOREAFTER(b,a) -> (b@anythings@a,t)
1839
1839
| Ast.NOTHING -> (anythings,t))
1840
1841
| _ -> failwith "not possible 7")
1841
1842
| Ast0.MIXED(_) -> failwith "not possible 8"
1842
1843
| Ast0.PLUS -> failwith "not possible 9"