5 files changed, 2 insertions, 39 deletions
diff --git a/src/boot/fe/ast.ml b/src/boot/fe/ast.ml
index c2387c5a..26c3b7c1 100644
--- a/src/boot/fe/ast.ml
+++ b/src/boot/fe/ast.ml
@@ -37,11 +37,6 @@ type layer =
   | LAYER_gc
 ;;
 
-type opacity =
-    OPA_transparent
-  | OPA_abstract
-;;
-
 type mutability =
     MUT_mutable
   | MUT_immutable
@@ -720,22 +715,6 @@ and fmt_layer_qual
   fmt_layer ff s;
   if s <> LAYER_value then fmt ff " ";
 
-and fmt_opacity
-    (ff:Format.formatter)
-    (opa:opacity)
-    : unit =
-  match opa with
-      OPA_transparent -> ()
-    | OPA_abstract -> fmt ff "abs"
-
-and fmt_opacity_qual
-    (ff:Format.formatter)
-    (op:opacity)
-    : unit =
-  fmt_opacity ff op;
-  if op <> OPA_transparent then fmt ff " ";
-
-
 and fmt_ty_fn
     (ff:Format.formatter)
     (ident_and_params:(ident * ty_param array) option)
diff --git a/src/boot/fe/item.ml b/src/boot/fe/item.ml
index df300b19..6b232e7e 100644
--- a/src/boot/fe/item.ml
+++ b/src/boot/fe/item.ml
@@ -609,8 +609,7 @@ and parse_stmts_including_none (ps:pstate) : Ast.stmt array =
             spans ps stmts apos (Ast.STMT_join lval)
 
 
-       | STATE | GC
-       | ABS | NATIVE
+       | STATE | GC | NATIVE
        | MOD | OBJ | TAG | TYPE | FN | USE ->
           let items = ctxt "stmt: decl" parse_mod_item ps in
           let bpos = lexpos ps in
@@ -695,7 +694,6 @@ and parse_stmts_including_none (ps:pstate) : Ast.stmt array =
 
 and parse_ty_param (iref:int ref) (ps:pstate) : Ast.ty_param identified =
   let apos = lexpos ps in
-  let _ = Pexp.parse_opacity ps in
   let s = Pexp.parse_layer ps in
   let ident = Pexp.parse_ident ps in
   let i = !iref in
@@ -990,9 +988,8 @@ and parse_mod_item (ps:pstate)
 
     match peek ps with
 
-        STATE | GC | ABS
+        STATE | GC
       | TYPE | OBJ | TAG | FN | ITER ->
-          let _ = Pexp.parse_opacity ps in
           let layer = Pexp.parse_layer ps in
             begin
               match peek ps with
diff --git a/src/boot/fe/lexer.mll b/src/boot/fe/lexer.mll
index 5cf73166..b375b874 100644
--- a/src/boot/fe/lexer.mll
+++ b/src/boot/fe/lexer.mll
@@ -95,8 +95,6 @@
                 ("claim", CLAIM);
                 ("prove", PROVE);
 
-                ("abs", ABS);
-
                 ("state", STATE);
                 ("gc", GC);
 
diff --git a/src/boot/fe/pexp.ml b/src/boot/fe/pexp.ml
index 5310f6df..ed36926d 100644
--- a/src/boot/fe/pexp.ml
+++ b/src/boot/fe/pexp.ml
@@ -140,11 +140,6 @@ and parse_optional_trailing_constrs (ps:pstate) : Ast.constrs =
       COLON -> (bump ps; parse_constrs ps)
     | _ -> [| |]
 
-and parse_opacity (ps:pstate) : Ast.opacity =
-  match peek ps with
-      ABS -> bump ps; Ast.OPA_abstract
-    |  _ -> Ast.OPA_transparent
-
 and parse_layer (ps:pstate) : Ast.layer =
   match peek ps with
       STATE -> bump ps; Ast.LAYER_state
diff --git a/src/boot/fe/token.ml b/src/boot/fe/token.ml
index 7f4665c2..0b157983 100644
--- a/src/boot/fe/token.ml
+++ b/src/boot/fe/token.ml
@@ -80,9 +80,6 @@ type token =
   | CLAIM
   | PROVE
 
-  (* Opacity keywords *)
-  | ABS
-
   (* Layer keywords *)
   | STATE
   | GC
@@ -243,9 +240,6 @@ let rec string_of_tok t =
     | CLAIM      -> "claim"
     | PROVE      -> "prove"
 
-    (* Opacity keywords *)
-    | ABS        -> "abs"
-
     (* Layer keywords *)
     | STATE      -> "state"
     | GC         -> "gc"