1 files changed, 49 insertions, 0 deletions
diff --git a/lib/syntax/dead_end.ml b/lib/syntax/dead_end.ml
new file mode 100644
index 0000000..78eadda
--- /dev/null
+++ b/lib/syntax/dead_end.ml
@@ -0,0 +1,49 @@
+open StdLabels
+
+type pos = Lexing.position * Lexing.position
+type ('a, 'b) variable = { pos : 'a; name : string; index : 'b option }
+
+module Expression = Default.Expression
+
+module Instruction = struct
+  type repr = unit
+  type expression = Expression.repr
+  type variable = Expression.variable
+
+  (** Call for an instruction like [GT] or [*CLR] *)
+  let call : pos -> string -> expression list -> repr = fun _ _ _ -> ()
+
+  (** Label for a loop *)
+  let location : pos -> string -> repr = fun _ _ -> ()
+
+  (** Comment *)
+  let comment : pos -> repr = fun _ -> ()
+
+  (** Raw expression *)
+  let expression : expression -> repr = fun _ -> ()
+
+  type clause = pos * expression * repr list
+
+  let if_ : pos -> clause -> elifs:clause list -> else_:repr list -> repr =
+   fun _ _ ~elifs ~else_ ->
+    ignore elifs;
+    ignore else_;
+    ()
+
+  let act : pos -> label:expression -> repr list -> repr =
+   fun _ ~label _ ->
+    ignore label;
+    ()
+
+  let assign : pos -> variable -> T.assignation_operator -> expression -> repr =
+   fun _ _ _ _ -> ()
+end
+
+module Location = struct
+  type repr = Instruction.repr
+  type instruction = Instruction.repr
+
+  let location : pos -> instruction list -> repr =
+   fun _pos instructions ->
+    List.fold_left instructions ~init:() ~f:(fun () instruction -> instruction)
+end