From 21e8298a4eae0d7cc0505e8962e307dc26112f80 Mon Sep 17 00:00:00 2001
From: Pierre-Emmanuel Wulfman <pierre.emmanuel.wulfman@gmail.com>
Date: Mon, 23 Mar 2020 16:00:50 +0100
Subject: [PATCH 1/2] add assign back

---
 src/passes/10-interpreter/interpreter.ml      |  4 +-
 src/passes/10-transpiler/transpiler.ml        |  9 +-
 .../2-concrete_to_imperative/cameligo.ml      |  9 +-
 .../2-concrete_to_imperative/pascaligo.ml     | 40 ++++-----
 src/passes/3-self_ast_imperative/helpers.ml   | 31 ++++---
 .../imperative_to_sugar.ml                    | 88 +++++++++++++------
 src/passes/5-self_ast_sugar/helpers.ml        | 12 +--
 src/passes/6-sugar_to_core/sugar_to_core.ml   | 12 +--
 src/passes/8-typer-new/typer.ml               | 10 +--
 src/passes/8-typer-old/typer.ml               | 10 +--
 src/passes/9-self_ast_typed/helpers.ml        | 12 +--
 src/passes/9-self_ast_typed/tail_recursion.ml |  4 +-
 src/stages/1-ast_imperative/PP.ml             | 21 +++--
 src/stages/1-ast_imperative/combinators.ml    | 28 +++---
 src/stages/1-ast_imperative/combinators.mli   |  5 +-
 src/stages/1-ast_imperative/misc.ml           |  1 +
 src/stages/1-ast_imperative/types.ml          | 15 +++-
 src/stages/2-ast_sugar/PP.ml                  |  4 +-
 src/stages/2-ast_sugar/combinators.ml         | 53 ++++-------
 src/stages/2-ast_sugar/combinators.mli        | 57 ++++++------
 src/stages/2-ast_sugar/types.ml               |  2 +-
 src/stages/3-ast_core/PP.ml                   |  2 +-
 src/stages/3-ast_core/combinators.ml          |  4 +-
 src/stages/3-ast_core/types.ml                |  2 +-
 src/stages/4-ast_typed/PP.ml                  |  2 +-
 src/stages/4-ast_typed/combinators.ml         |  2 +-
 src/stages/4-ast_typed/misc.ml                |  2 +-
 src/stages/4-ast_typed/misc_smart.ml          |  2 +-
 src/stages/4-ast_typed/types.ml               |  2 +-
 src/stages/typesystem/misc.ml                 |  6 +-
 src/test/multisig_v2_tests.ml                 |  2 +-
 31 files changed, 242 insertions(+), 211 deletions(-)

diff --git a/src/passes/10-interpreter/interpreter.ml b/src/passes/10-interpreter/interpreter.ml
index 1a04d35c4..43e78312a 100644
--- a/src/passes/10-interpreter/interpreter.ml
+++ b/src/passes/10-interpreter/interpreter.ml
@@ -316,8 +316,8 @@ and eval : Ast_typed.expression -> env -> value result
           ok (label,v'))
         (LMap.to_kv_list recmap) in
       ok @@ V_Record (LMap.of_list lv')
-    | E_record_accessor { expr ; label} -> (
-      let%bind record' = eval expr env in
+    | E_record_accessor { record ; label} -> (
+      let%bind record' = eval record env in
       match record' with
       | V_Record recmap ->
         let%bind a = trace_option (simple_error "unknown record field") @@
diff --git a/src/passes/10-transpiler/transpiler.ml b/src/passes/10-transpiler/transpiler.ml
index 2d726d2df..b83e84bf6 100644
--- a/src/passes/10-transpiler/transpiler.ml
+++ b/src/passes/10-transpiler/transpiler.ml
@@ -301,11 +301,12 @@ and transpile_annotated_expression (ae:AST.expression) : expression result =
       trace_strong (corner_case ~loc:__LOC__ "record build") @@
       Append_tree.fold_ne (transpile_annotated_expression) aux node
     )
-  | E_record_accessor {expr; label} ->
-      let%bind ty' = transpile_type (get_type_expression expr) in
+  | E_record_accessor {record; label} ->
+      let ty  = get_type_expression record in
+      let%bind ty' = transpile_type ty in
       let%bind ty_lmap =
         trace_strong (corner_case ~loc:__LOC__ "not a record") @@
-        get_t_record (get_type_expression expr) in
+        get_t_record ty in
       let%bind ty'_lmap = Stage_common.Helpers.bind_map_lmap transpile_type ty_lmap in
       let%bind path =
         trace_strong (corner_case ~loc:__LOC__ "record access") @@
@@ -315,7 +316,7 @@ and transpile_annotated_expression (ae:AST.expression) : expression result =
           | `Left  -> C_CAR
           | `Right -> C_CDR in
         Combinators.Expression.make_tpl (E_constant {cons_name=c;arguments=[pred]} , ty) in
-      let%bind record' = transpile_annotated_expression expr in
+      let%bind record' = transpile_annotated_expression record in
       let expr = List.fold_left aux record' path in
       ok expr
   | E_record_update {record; path; update} -> 
diff --git a/src/passes/2-concrete_to_imperative/cameligo.ml b/src/passes/2-concrete_to_imperative/cameligo.ml
index f6b2ef165..371e0c784 100644
--- a/src/passes/2-concrete_to_imperative/cameligo.ml
+++ b/src/passes/2-concrete_to_imperative/cameligo.ml
@@ -383,11 +383,10 @@ let rec compile_expression :
         match variables with
         | hd :: [] ->
           if (List.length prep_vars = 1)
-          then e_let_in hd false inline rhs_b_expr body
-          else e_let_in hd false inline (e_accessor rhs_b_expr (string_of_int ((List.length prep_vars) - 1))) body
+          then e_let_in hd inline rhs_b_expr body
+          else e_let_in hd inline (e_accessor rhs_b_expr (string_of_int ((List.length prep_vars) - 1))) body
         | hd :: tl ->
           e_let_in hd
-          false
           inline
           (e_accessor rhs_b_expr (string_of_int ((List.length prep_vars) - (List.length tl) - 1)))
           (chain_let_in tl body)
@@ -408,7 +407,7 @@ let rec compile_expression :
       let%bind ret_expr = if List.length prep_vars = 1
         then ok (chain_let_in prep_vars body)
         (* Bind the right hand side so we only evaluate it once *)
-        else ok (e_let_in (rhs_b, ty_opt) false inline rhs' (chain_let_in prep_vars body))
+        else ok (e_let_in (rhs_b, ty_opt) inline rhs' (chain_let_in prep_vars body))
       in
       let%bind ret_expr = match kwd_rec with 
         | None -> ok @@ ret_expr
@@ -572,7 +571,7 @@ let rec compile_expression :
                   | Raw.PVar y ->
                     let var_name = Var.of_name y.value in
                     let%bind type_expr = compile_type_expression x'.type_expr in
-                    return @@ e_let_in (var_name , Some type_expr) false false e rhs
+                    return @@ e_let_in (var_name , Some type_expr) false e rhs
                   | _ -> default_action ()
                 )
               | _ -> default_action ()
diff --git a/src/passes/2-concrete_to_imperative/pascaligo.ml b/src/passes/2-concrete_to_imperative/pascaligo.ml
index 53287557d..2eb055351 100644
--- a/src/passes/2-concrete_to_imperative/pascaligo.ml
+++ b/src/passes/2-concrete_to_imperative/pascaligo.ml
@@ -14,8 +14,6 @@ let pseq_to_list = function
 | Some lst -> npseq_to_list lst
 let get_value : 'a Raw.reg -> 'a = fun x -> x.value
 
-
-
 module Errors = struct
   let unsupported_cst_constr p =
     let title () = "" in
@@ -134,10 +132,10 @@ let r_split = Location.r_split
    [return_statement] is used for non-let-in statements.
  *)
 
-let return_let_in ?loc binder mut inline rhs = ok @@ fun expr'_opt ->
+let return_let_in ?loc binder inline rhs = ok @@ fun expr'_opt ->
   match expr'_opt with
-  | None -> ok @@ e_let_in ?loc binder mut inline rhs (e_skip ())
-  | Some expr' -> ok @@ e_let_in ?loc binder mut inline rhs expr'
+  | None -> ok @@ e_let_in ?loc binder inline rhs (e_skip ())
+  | Some expr' -> ok @@ e_let_in ?loc binder inline rhs expr'
 
 let return_statement expr = ok @@ fun expr'_opt ->
   match expr'_opt with
@@ -525,7 +523,7 @@ and compile_data_declaration : Raw.data_decl -> _ result =
       let name = x.name.value in
       let%bind t = compile_type_expression x.var_type in
       let%bind expression = compile_expression x.init in
-      return_let_in ~loc (Var.of_name name, Some t) false false expression
+      return_let_in ~loc (Var.of_name name, Some t) false expression
   | LocalConst x ->
       let (x , loc) = r_split x in
       let name = x.name.value in
@@ -537,7 +535,7 @@ and compile_data_declaration : Raw.data_decl -> _ result =
         | Some {value; _} ->
            npseq_to_list value.ne_elements
            |> List.exists (fun Region.{value; _} -> value = "\"inline\"")
-      in return_let_in ~loc (Var.of_name name, Some t) false inline expression
+      in return_let_in ~loc (Var.of_name name, Some t) inline expression
   | LocalFun f  ->
       let (f , loc) = r_split f in
       let%bind (binder, expr) = compile_fun_decl ~loc f in
@@ -547,7 +545,7 @@ and compile_data_declaration : Raw.data_decl -> _ result =
         | Some {value; _} ->
            npseq_to_list value.ne_elements
            |> List.exists (fun Region.{value; _} -> value = "\"inline\"")
-      in return_let_in ~loc binder false inline expr
+      in return_let_in ~loc binder inline expr
 
 and compile_param :
       Raw.param_decl -> (string * type_expression) result =
@@ -618,7 +616,7 @@ and compile_fun_decl :
            let expr =
              e_accessor (e_variable arguments_name) (string_of_int i) in
            let type_variable = Some type_expr in
-           let ass = return_let_in (Var.of_name param , type_variable) false inline expr in
+           let ass = return_let_in (Var.of_name param , type_variable) inline expr in
            ass
          in
          bind_list @@ List.mapi aux params in
@@ -681,7 +679,7 @@ and compile_fun_expression :
          let aux = fun i (param, param_type) ->
            let expr = e_accessor (e_variable arguments_name) (string_of_int i) in
            let type_variable = Some param_type in
-           let ass = return_let_in (Var.of_name param , type_variable) false false expr in
+           let ass = return_let_in (Var.of_name param , type_variable) false expr in
            ass
          in
          bind_list @@ List.mapi aux params in
@@ -817,8 +815,7 @@ and compile_single_instruction : Raw.instruction -> (_ -> expression result) res
       match a.lhs with
         | Path path -> (
             let (name , path') = compile_path path in
-            let (let_binder, mut, rhs, inline) = e_assign_with_let ~loc name path' value_expr in
-            return_let_in let_binder mut inline rhs
+            return_statement @@ e_ez_assign ~loc name path' value_expr
           )
         | MapPath v -> (
             let v' = v.value in
@@ -831,8 +828,7 @@ and compile_single_instruction : Raw.instruction -> (_ -> expression result) res
             in
             let%bind key_expr = compile_expression v'.index.value.inside in
             let expr' = e_map_add key_expr value_expr map in
-            let (let_binder, mut, rhs, inline) = e_assign_with_let ~loc varname path expr' in
-            return_let_in let_binder mut inline rhs  
+            return_statement @@ e_ez_assign ~loc varname path expr'
           )
     )
   | CaseInstr c -> (
@@ -872,9 +868,7 @@ and compile_single_instruction : Raw.instruction -> (_ -> expression result) res
       let u : Raw.update = {record=r.path;kwd_with=r.kwd_with; updates=update} in
       let%bind expr = compile_update {value=u;region=reg} in
       let (name , access_path) = compile_path r.path in
-      let loc = Some loc in
-      let (binder, mut, rhs, inline) = e_assign_with_let ?loc name access_path expr in
-      return_let_in binder mut inline rhs
+       return_statement @@ e_ez_assign ~loc name access_path expr
 
   )
   | MapPatch patch -> (
@@ -897,8 +891,7 @@ and compile_single_instruction : Raw.instruction -> (_ -> expression result) res
             inj
             (e_accessor_list ~loc (e_variable (Var.of_name name)) access_path)
         in 
-        let (binder, mut, rhs, inline) = e_assign_with_let ~loc name access_path assigns in
-        return_let_in binder mut inline rhs
+       return_statement @@ e_ez_assign ~loc name access_path assigns
     )
   | SetPatch patch -> (
       let (setp, loc) = r_split patch in
@@ -913,8 +906,7 @@ and compile_single_instruction : Raw.instruction -> (_ -> expression result) res
         let assigns = List.fold_right
           (fun hd s -> e_constant C_SET_ADD [hd ; s])
           inj (e_accessor_list ~loc (e_variable (Var.of_name name)) access_path) in
-        let (binder, mut, rhs, inline) = e_assign_with_let ~loc name access_path assigns in
-        return_let_in binder mut inline rhs
+       return_statement @@ e_ez_assign ~loc name access_path assigns
     )
   | MapRemove r -> (
       let (v , loc) = r_split r in
@@ -928,8 +920,7 @@ and compile_single_instruction : Raw.instruction -> (_ -> expression result) res
       in
       let%bind key' = compile_expression key in
       let expr = e_constant ~loc C_MAP_REMOVE [key' ; map] in
-      let (binder, mut, rhs, inline) = e_assign_with_let ~loc varname path expr in
-      return_let_in binder mut inline rhs
+       return_statement @@ e_ez_assign ~loc varname path expr
     )
   | SetRemove r -> (
       let (set_rm, loc) = r_split r in
@@ -942,8 +933,7 @@ and compile_single_instruction : Raw.instruction -> (_ -> expression result) res
       in
       let%bind removed' = compile_expression set_rm.element in
       let expr = e_constant ~loc C_SET_REMOVE [removed' ; set] in
-      let (binder, mut, rhs, inline) = e_assign_with_let ~loc varname path expr in
-      return_let_in binder mut inline rhs
+       return_statement @@ e_ez_assign ~loc varname path expr
     )
 
 and compile_path : Raw.path -> string * string list = fun p ->
diff --git a/src/passes/3-self_ast_imperative/helpers.ml b/src/passes/3-self_ast_imperative/helpers.ml
index 42ee86259..f70b21aaf 100644
--- a/src/passes/3-self_ast_imperative/helpers.ml
+++ b/src/passes/3-self_ast_imperative/helpers.ml
@@ -47,8 +47,8 @@ let rec fold_expression : 'a folder -> 'a -> expression -> 'a result = fun f ini
     let%bind res = fold_expression self res update in
     ok res 
   )
-  | E_record_accessor {expr} -> (
-     let%bind res = self init' expr in
+  | E_record_accessor {record} -> (
+     let%bind res = self init' record in
      ok res
     )
   | E_let_in { let_binder = _ ; rhs ; let_result } -> (
@@ -63,6 +63,9 @@ let rec fold_expression : 'a folder -> 'a -> expression -> 'a result = fun f ini
       let ab = (expr1,expr2) in
       let%bind res = bind_fold_pair self init' ab in
       ok res
+  | E_assign {variable=_;access_path=_;expression} ->
+      let%bind res = self init' expression in
+      ok res
   | E_for {body; _} ->
       let%bind res = self init' body in
       ok res
@@ -74,6 +77,7 @@ let rec fold_expression : 'a folder -> 'a -> expression -> 'a result = fun f ini
       let%bind res = self init' condition in
       let%bind res = self res body in
       ok res  
+
      
 
 and fold_cases : 'a folder -> 'a -> matching_expr -> 'a result = fun f init m ->
@@ -145,8 +149,8 @@ let rec map_expression : exp_mapper -> expression -> expression result = fun f e
       return @@ E_matching {matchee=e';cases=cases'}
     )
   | E_record_accessor acc -> (
-      let%bind e' = self acc.expr in
-      return @@ E_record_accessor {acc with expr = e'}
+      let%bind e' = self acc.record in
+      return @@ E_record_accessor {acc with record = e'}
     )
   | E_record m -> (
     let%bind m' = bind_map_lmap self m in
@@ -166,10 +170,10 @@ let rec map_expression : exp_mapper -> expression -> expression result = fun f e
       let%bind (lamb,args) = bind_map_pair self ab in
       return @@ E_application {lamb;args}
     )
-  | E_let_in { let_binder ; mut; rhs ; let_result; inline } -> (
+  | E_let_in { let_binder ; rhs ; let_result; inline } -> (
       let%bind rhs = self rhs in
       let%bind let_result = self let_result in
-      return @@ E_let_in { let_binder ; mut; rhs ; let_result; inline }
+      return @@ E_let_in { let_binder ; rhs ; let_result; inline }
     )
   | E_lambda { binder ; input_type ; output_type ; result } -> (
       let%bind result = self result in
@@ -187,6 +191,10 @@ let rec map_expression : exp_mapper -> expression -> expression result = fun f e
       let%bind (expr1,expr2) = bind_map_pair self (expr1,expr2) in
       return @@ E_sequence {expr1;expr2}
     )
+  | E_assign {variable;access_path;expression} -> (
+      let%bind expression = self expression in
+      return @@ E_assign {variable;access_path;expression}
+  )
   | E_for {binder; start; final; increment; body} ->
       let%bind body = self body in
       return @@ E_for {binder; start; final; increment; body}
@@ -303,8 +311,8 @@ let rec fold_map_expression : 'a fold_mapper -> 'a -> expression -> ('a * expres
       ok (res, return @@ E_matching {matchee=e';cases=cases'})
     )
   | E_record_accessor acc -> (
-      let%bind (res, e') = self init' acc.expr in
-      ok (res, return @@ E_record_accessor {acc with expr = e'})
+      let%bind (res, e') = self init' acc.record in
+      ok (res, return @@ E_record_accessor {acc with record = e'})
     )
   | E_record m -> (
     let%bind (res, lst') = bind_fold_map_list (fun res (k,e) -> let%bind (res,e) = self res e in ok (res,(k,e))) init' (LMap.to_kv_list m) in
@@ -325,10 +333,10 @@ let rec fold_map_expression : 'a fold_mapper -> 'a -> expression -> ('a * expres
       let%bind (res,(a,b)) = bind_fold_map_pair self init' ab in
       ok (res, return @@ E_application {lamb=a;args=b})
     )
-  | E_let_in { let_binder ; mut; rhs ; let_result; inline } -> (
+  | E_let_in { let_binder ; rhs ; let_result; inline } -> (
       let%bind (res,rhs) = self init' rhs in
       let%bind (res,let_result) = self res let_result in
-      ok (res, return @@ E_let_in { let_binder ; mut; rhs ; let_result ; inline })
+      ok (res, return @@ E_let_in { let_binder ; rhs ; let_result ; inline })
     )
   | E_lambda { binder ; input_type ; output_type ; result } -> (
       let%bind (res,result) = self init' result in
@@ -346,6 +354,9 @@ let rec fold_map_expression : 'a fold_mapper -> 'a -> expression -> ('a * expres
       let%bind (res,(expr1,expr2)) = bind_fold_map_pair self init' (expr1,expr2) in
       ok (res, return @@ E_sequence {expr1;expr2})
     )
+  | E_assign {variable;access_path;expression} ->
+      let%bind (res, expression) = self init' expression in
+      ok (res, return @@ E_assign {variable;access_path;expression})
   | E_for {binder; start; final; increment; body} ->
       let%bind (res, body) = self init' body in
       ok (res, return @@ E_for {binder; start; final; increment; body})
diff --git a/src/passes/4-imperative_to_sugar/imperative_to_sugar.ml b/src/passes/4-imperative_to_sugar/imperative_to_sugar.ml
index a461dc9ae..33c56626b 100644
--- a/src/passes/4-imperative_to_sugar/imperative_to_sugar.ml
+++ b/src/passes/4-imperative_to_sugar/imperative_to_sugar.ml
@@ -37,7 +37,7 @@ let repair_mutable_variable_in_matching (match_body : O.expression) (element_nam
             ok (true,(decl_var, free_var), O.e_let_in let_binder false false rhs let_result)
           else(
             let free_var = if (List.mem name free_var) then free_var else name::free_var in
-            let expr = O.e_let_in (env,None) false false (O.e_update (O.e_variable env) (Var.to_name name) (O.e_variable name)) let_result in
+            let expr = O.e_let_in (env,None) false false (O.e_record_update (O.e_variable env) (Var.to_name name) (O.e_variable name)) let_result in
             ok (true,(decl_var, free_var), O.e_let_in let_binder false  false rhs expr)
           )
         | E_constant {cons_name=C_MAP_FOLD;arguments= _}
@@ -70,8 +70,8 @@ and repair_mutable_variable_in_loops (for_body : O.expression) (element_names :
           else(
             let free_var = if (List.mem name free_var) then free_var else name::free_var in
             let expr = O.e_let_in (env,None) false false (
-              O.e_update (O.e_variable env) ("0") 
-              (O.e_update (O.e_accessor (O.e_variable env) "0") (Var.to_name name) (O.e_variable name))
+              O.e_record_update (O.e_variable env) ("0") 
+              (O.e_record_update (O.e_record_accessor (O.e_variable env) "0") (Var.to_name name) (O.e_variable name))
               )
               let_result in
             ok (true,(decl_var, free_var), O.e_let_in let_binder false  false rhs expr)
@@ -95,7 +95,7 @@ and store_mutable_variable (free_vars : I.expression_variable list) =
  
 and restore_mutable_variable (expr : O.expression->O.expression_content) (free_vars : O.expression_variable list) (env : O.expression_variable) =
   let aux (f: O.expression -> O.expression) (ev: O.expression_variable) =
-    fun expr -> f (O.e_let_in (ev,None) true false (O.e_accessor (O.e_variable env) (Var.to_name ev)) expr)
+    fun expr -> f (O.e_let_in (ev,None) true false (O.e_record_accessor (O.e_variable env) (Var.to_name ev)) expr)
   in
   let ef = List.fold_left aux (fun e -> e) free_vars in
   expr (ef (O.e_skip ()))
@@ -178,12 +178,12 @@ let rec compile_expression : I.expression -> O.expression result =
       let%bind fun_type = compile_type_expression fun_type in
       let%bind lambda = compile_lambda lambda in
       return @@ O.E_recursive {fun_name;fun_type;lambda}
-    | I.E_let_in {let_binder;mut;inline;rhs;let_result} ->
+    | I.E_let_in {let_binder;inline;rhs;let_result} ->
       let (binder,ty_opt) = let_binder in
       let%bind ty_opt = bind_map_option compile_type_expression ty_opt in
       let%bind rhs = compile_expression rhs in
       let%bind let_result = compile_expression let_result in
-      return @@ O.E_let_in {let_binder=(binder,ty_opt);mut;inline;rhs;let_result}
+      return @@ O.E_let_in {let_binder=(binder,ty_opt);mut=false;inline;rhs;let_result}
     | I.E_constructor {constructor;element} ->
       let%bind element = compile_expression element in
       return @@ O.E_constructor {constructor;element}
@@ -199,9 +199,9 @@ let rec compile_expression : I.expression -> O.expression result =
         ) record
       in
       return @@ O.E_record (O.LMap.of_list record)
-    | I.E_record_accessor {expr;label} ->
-      let%bind expr = compile_expression expr in
-      return @@ O.E_record_accessor {expr;label}
+    | I.E_record_accessor {record;label} ->
+      let%bind record = compile_expression record in
+      return @@ O.E_record_accessor {record;label}
     | I.E_record_update {record;path;update} ->
       let%bind record = compile_expression record in
       let%bind update = compile_expression update in
@@ -231,11 +231,18 @@ let rec compile_expression : I.expression -> O.expression result =
       let%bind anno_expr = compile_expression anno_expr in
       let%bind type_annotation = compile_type_expression type_annotation in
       return @@ O.E_ascription {anno_expr; type_annotation}
+    | I.E_sequence {expr1={expression_content=I.E_assign expr1;_}; expr2} ->
+      let%bind expr2 = compile_expression expr2 in
+      let%bind ret = compile_assign expr1 @@ expr2 in
+      return @@ ret
     | I.E_sequence {expr1; expr2} ->
       let%bind expr1 = compile_expression expr1 in
       let%bind expr2 = compile_expression expr2 in
       ok @@ add_to_end expr1 expr2 
     | I.E_skip -> return @@ O.E_skip
+    | I.E_assign ass ->
+      let%bind content =  compile_assign ass @@ O.e_skip () in
+      return @@ content
     | I.E_for f -> 
       let%bind f = compile_for f in
       return @@ f
@@ -246,6 +253,37 @@ let rec compile_expression : I.expression -> O.expression result =
       let%bind w = compile_while w in
       return @@ w
 
+and compile_assign {variable; access_path; expression} expr =
+  let accessor ?loc s a =
+    match a with 
+      I.Access_tuple _i -> failwith "adding tuple soon"
+    | I.Access_record a -> ok @@ O.e_record_accessor ?loc s a
+    | I.Access_map k -> 
+      let%bind k = compile_expression k in
+      ok @@ O.e_constant ?loc C_MAP_FIND_OPT [k;s]
+  in
+  let update ?loc (s:O.expression) a e =
+    match a with
+      I.Access_tuple _i -> failwith "adding tuple soon"      
+    | I.Access_record a -> ok @@ O.e_record_update ?loc s a e
+    | I.Access_map k ->
+      let%bind k = compile_expression k in
+      ok @@ O.e_constant ?loc C_UPDATE [k;O.e_some (e);s]
+  in
+  let aux (s, e : O.expression * _) lst =
+    let%bind s' = accessor ~loc:s.location s lst in
+    let e' = fun expr -> 
+      let%bind u = update ~loc:s.location s lst (expr)
+      in e u 
+    in
+    ok @@ (s',e')
+  in
+  let%bind (_,rhs) = bind_fold_list aux (O.e_variable variable, fun e -> ok @@ e) access_path in
+  let%bind expression = compile_expression expression in
+  let%bind rhs = rhs @@ expression in
+  ok @@ O.E_let_in {let_binder=(variable,None); mut=true; rhs; let_result=expr;inline = false}
+
+
 and compile_lambda : I.lambda -> O.lambda result =
   fun {binder;input_type;output_type;result}->
     let%bind input_type = bind_map_option compile_type_expression input_type in
@@ -362,7 +400,7 @@ and compile_while I.{condition;body} =
   let for_body = add_to_end for_body ctrl in
 
   let aux name expr=
-    O.e_let_in (name,None) false false (O.e_accessor (O.e_accessor (O.e_variable binder) "0") (Var.to_name name)) expr
+    O.e_let_in (name,None) false false (O.e_record_accessor (O.e_record_accessor (O.e_variable binder) "0") (Var.to_name name)) expr
   in
   let init_rec = O.e_tuple [store_mutable_variable @@ captured_name_list] in
   let restore = fun expr -> List.fold_right aux captured_name_list expr in
@@ -377,7 +415,7 @@ and compile_while I.{condition;body} =
   let return_expr = fun expr -> 
     O.E_let_in {let_binder; mut=false; inline=false; rhs=init_rec; let_result=
     O.e_let_in let_binder false false loop @@
-    O.e_let_in let_binder false false (O.e_accessor (O.e_variable env_rec) "0") @@
+    O.e_let_in let_binder false false (O.e_record_accessor (O.e_variable env_rec) "0") @@
     expr
     }
   in
@@ -393,7 +431,7 @@ and compile_for I.{binder;start;final;increment;body} =
   let continue_expr = O.e_constant C_FOLD_CONTINUE [(O.e_variable env_rec)] in
   let ctrl = 
     O.e_let_in (binder,Some O.t_int) false false (O.e_constant C_ADD [ O.e_variable binder ; step ]) @@
-    O.e_let_in (env_rec, None) false false (O.e_update (O.e_variable env_rec) "1" @@ O.e_variable binder)@@
+    O.e_let_in (env_rec, None) false false (O.e_record_update (O.e_variable env_rec) "1" @@ O.e_variable binder)@@
     continue_expr
   in
   (* Modify the body loop*)
@@ -402,7 +440,7 @@ and compile_for I.{binder;start;final;increment;body} =
   let for_body = add_to_end for_body ctrl in
 
   let aux name expr=
-    O.e_let_in (name,None) false false (O.e_accessor (O.e_accessor (O.e_variable env_rec) "0") (Var.to_name name)) expr
+    O.e_let_in (name,None) false false (O.e_record_accessor (O.e_record_accessor (O.e_variable env_rec) "0") (Var.to_name name)) expr
   in
 
   (* restores the initial value of the free_var*)
@@ -411,7 +449,7 @@ and compile_for I.{binder;start;final;increment;body} =
   (*Prep the lambda for the fold*)
   let stop_expr = O.e_constant C_FOLD_STOP [O.e_variable env_rec] in
   let aux_func = O.e_lambda env_rec None None @@ 
-                 O.e_let_in (binder,Some O.t_int) false false (O.e_accessor (O.e_variable env_rec) "1") @@
+                 O.e_let_in (binder,Some O.t_int) false false (O.e_record_accessor (O.e_variable env_rec) "1") @@
                  O.e_cond cond (restore for_body) (stop_expr) in
 
   (* Make the fold_while en precharge the vakye *)
@@ -424,7 +462,7 @@ and compile_for I.{binder;start;final;increment;body} =
     O.E_let_in {let_binder=(binder, Some O.t_int);mut=false; inline=false;rhs=start;let_result=
     O.e_let_in let_binder false false init_rec @@
     O.e_let_in let_binder false false loop @@
-    O.e_let_in let_binder false false (O.e_accessor (O.e_variable env_rec) "0") @@
+    O.e_let_in let_binder false false (O.e_record_accessor (O.e_variable env_rec) "0") @@
     expr
     }
   in
@@ -440,21 +478,21 @@ and compile_for_each I.{binder;collection;collection_type; body} =
   let env = Var.fresh () in
   let%bind body = compile_expression body in
   let%bind ((_,free_vars), body) = repair_mutable_variable_in_loops body element_names args in
-  let for_body = add_to_end body @@ (O.e_accessor (O.e_variable args) "0") in
+  let for_body = add_to_end body @@ (O.e_record_accessor (O.e_variable args) "0") in
 
   let init_record = store_mutable_variable free_vars in
   let%bind collect = compile_expression collection in
   let aux name expr=
-    O.e_let_in (name,None) false false (O.e_accessor (O.e_accessor (O.e_variable args) "0") (Var.to_name name)) expr
+    O.e_let_in (name,None) false false (O.e_record_accessor (O.e_record_accessor (O.e_variable args) "0") (Var.to_name name)) expr
   in
   let restore = fun expr -> List.fold_right aux free_vars expr in
   let restore = match collection_type with
     | Map -> (match snd binder with 
-      | Some v -> fun expr -> restore (O.e_let_in (fst binder, None) false false (O.e_accessor (O.e_accessor (O.e_variable args) "1") "0") 
-                                    (O.e_let_in (v, None) false false (O.e_accessor (O.e_accessor (O.e_variable args) "1") "1") expr))
-      | None -> fun expr -> restore (O.e_let_in (fst binder, None) false false (O.e_accessor (O.e_accessor (O.e_variable args) "1") "0") expr) 
+      | Some v -> fun expr -> restore (O.e_let_in (fst binder, None) false false (O.e_record_accessor (O.e_record_accessor (O.e_variable args) "1") "0") 
+                                    (O.e_let_in (v, None) false false (O.e_record_accessor (O.e_record_accessor (O.e_variable args) "1") "1") expr))
+      | None -> fun expr -> restore (O.e_let_in (fst binder, None) false false (O.e_record_accessor (O.e_record_accessor (O.e_variable args) "1") "0") expr) 
     )
-    | _ -> fun expr -> restore (O.e_let_in (fst binder, None) false false (O.e_accessor (O.e_variable args) "1") expr)
+    | _ -> fun expr -> restore (O.e_let_in (fst binder, None) false false (O.e_record_accessor (O.e_variable args) "1") expr)
   in
   let lambda = O.e_lambda args None None (restore for_body) in
   let%bind op_name = match collection_type with
@@ -564,7 +602,7 @@ let rec uncompile_expression : O.expression -> I.expression result =
     let%bind ty_opt = bind_map_option uncompile_type_expression ty_opt in
     let%bind rhs = uncompile_expression rhs in
     let%bind let_result = uncompile_expression let_result in
-    return @@ I.E_let_in {let_binder=(binder,ty_opt);mut=false;inline;rhs;let_result}
+    return @@ I.E_let_in {let_binder=(binder,ty_opt);inline;rhs;let_result}
   | O.E_constructor {constructor;element} ->
     let%bind element = uncompile_expression element in
     return @@ I.E_constructor {constructor;element}
@@ -581,9 +619,9 @@ let rec uncompile_expression : O.expression -> I.expression result =
       ) record
     in
     return @@ I.E_record (O.LMap.of_list record)
-  | O.E_record_accessor {expr;label} ->
-    let%bind expr = uncompile_expression expr in
-    return @@ I.E_record_accessor {expr;label}
+  | O.E_record_accessor {record;label} ->
+    let%bind record = uncompile_expression record in
+    return @@ I.E_record_accessor {record;label}
   | O.E_record_update {record;path;update} ->
     let%bind record = uncompile_expression record in
     let%bind update = uncompile_expression update in
diff --git a/src/passes/5-self_ast_sugar/helpers.ml b/src/passes/5-self_ast_sugar/helpers.ml
index 71597ce5e..0e0ddbd45 100644
--- a/src/passes/5-self_ast_sugar/helpers.ml
+++ b/src/passes/5-self_ast_sugar/helpers.ml
@@ -47,8 +47,8 @@ let rec fold_expression : 'a folder -> 'a -> expression -> 'a result = fun f ini
     let%bind res = fold_expression self res update in
     ok res 
   )
-  | E_record_accessor {expr} -> (
-     let%bind res = self init' expr in
+  | E_record_accessor {record} -> (
+     let%bind res = self init' record in
      ok res
     )
   | E_let_in { let_binder = _ ; rhs ; let_result } -> (
@@ -134,8 +134,8 @@ let rec map_expression : exp_mapper -> expression -> expression result = fun f e
       return @@ E_matching {matchee=e';cases=cases'}
     )
   | E_record_accessor acc -> (
-      let%bind e' = self acc.expr in
-      return @@ E_record_accessor {acc with expr = e'}
+      let%bind e' = self acc.record in
+      return @@ E_record_accessor {acc with record = e'}
     )
   | E_record m -> (
     let%bind m' = bind_map_lmap self m in
@@ -280,8 +280,8 @@ let rec fold_map_expression : 'a fold_mapper -> 'a -> expression -> ('a * expres
       ok (res, return @@ E_matching {matchee=e';cases=cases'})
     )
   | E_record_accessor acc -> (
-      let%bind (res, e') = self init' acc.expr in
-      ok (res, return @@ E_record_accessor {acc with expr = e'})
+      let%bind (res, e') = self init' acc.record in
+      ok (res, return @@ E_record_accessor {acc with record = e'})
     )
   | E_record m -> (
     let%bind (res, lst') = bind_fold_map_list (fun res (k,e) -> let%bind (res,e) = self res e in ok (res,(k,e))) init' (LMap.to_kv_list m) in
diff --git a/src/passes/6-sugar_to_core/sugar_to_core.ml b/src/passes/6-sugar_to_core/sugar_to_core.ml
index 48c43f6d7..e75b9c2ff 100644
--- a/src/passes/6-sugar_to_core/sugar_to_core.ml
+++ b/src/passes/6-sugar_to_core/sugar_to_core.ml
@@ -101,9 +101,9 @@ let rec compile_expression : I.expression -> O.expression result =
         ) record
       in
       return @@ O.E_record (O.LMap.of_list record)
-    | I.E_record_accessor {expr;label} ->
-      let%bind expr = compile_expression expr in
-      return @@ O.E_record_accessor {expr;label}
+    | I.E_record_accessor {record;label} ->
+      let%bind record = compile_expression record in
+      return @@ O.E_record_accessor {record;label}
     | I.E_record_update {record;path;update} ->
       let%bind record = compile_expression record in
       let%bind update = compile_expression update in
@@ -294,9 +294,9 @@ let rec uncompile_expression : O.expression -> I.expression result =
       ) record
     in
     return @@ I.E_record (O.LMap.of_list record)
-  | O.E_record_accessor {expr;label} ->
-    let%bind expr = uncompile_expression expr in
-    return @@ I.E_record_accessor {expr;label}
+  | O.E_record_accessor {record;label} ->
+    let%bind record = uncompile_expression record in
+    return @@ I.E_record_accessor {record;label}
   | O.E_record_update {record;path;update} ->
     let%bind record = uncompile_expression record in
     let%bind update = uncompile_expression update in
diff --git a/src/passes/8-typer-new/typer.ml b/src/passes/8-typer-new/typer.ml
index 0dcae68d0..f446c1076 100644
--- a/src/passes/8-typer-new/typer.ml
+++ b/src/passes/8-typer-new/typer.ml
@@ -452,10 +452,10 @@ and type_expression : environment -> Solver.state -> ?tv_opt:O.type_expression -
    *     | Some (T_constant ("address" , [])) -> return (E_literal (Literal_address s)) (t_address ())
    *     | _ -> return (E_literal (Literal_string s)) (t_string ())
    *   ) *)
-  | E_record_accessor {expr;label} -> (
-      let%bind (base' , state') = type_expression e state expr in
+  | E_record_accessor {record;label} -> (
+      let%bind (base' , state') = type_expression e state record in
       let wrapped = Wrap.access_label ~base:base'.type_expression ~label in
-      return_wrapped (E_record_accessor {expr=base';label}) state' wrapped
+      return_wrapped (E_record_accessor {record=base';label}) state' wrapped
     )
 
   (* Sum *)
@@ -1055,8 +1055,8 @@ let rec untype_expression (e:O.expression) : (I.expression) result =
     let%bind r' = bind_smap
       @@ Map.String.map untype_expression r in
     return (e_record r')
-  | E_record_accessor {expr; label} ->
-    let%bind r' = untype_expression expr in
+  | E_record_accessor {record; label} ->
+    let%bind r' = untype_expression record in
     let Label s = label in
     return (e_accessor r' s)
   | E_record_update {record; path; update} ->
diff --git a/src/passes/8-typer-old/typer.ml b/src/passes/8-typer-old/typer.ml
index 5a11d6184..d26828230 100644
--- a/src/passes/8-typer-old/typer.ml
+++ b/src/passes/8-typer-old/typer.ml
@@ -450,8 +450,8 @@ and type_expression' : environment -> ?tv_opt:O.type_expression -> I.expression
       return (e_address s) (t_address ())
   | E_literal (Literal_operation op) ->
       return (e_operation op) (t_operation ())
-  | E_record_accessor {expr;label} ->
-      let%bind e' = type_expression' e expr in
+  | E_record_accessor {record;label} ->
+      let%bind e' = type_expression' e record in
       let aux (prev:O.expression) (a:I.label) : O.expression result =
             let property = a in
             let%bind r_tv = get_t_record prev.type_expression in
@@ -459,7 +459,7 @@ and type_expression' : environment -> ?tv_opt:O.type_expression -> I.expression
               generic_try (bad_record_access property ae prev.type_expression ae.location)
               @@ (fun () -> I.LMap.find property r_tv) in
             let location = ae.location in
-            ok @@ make_a_e ~location (E_record_accessor {expr=prev; label=property}) tv e
+            ok @@ make_a_e ~location (E_record_accessor {record=prev; label=property}) tv e
       in
       let%bind ae =
       trace (simple_info "accessing") @@ aux e' label in
@@ -861,8 +861,8 @@ let rec untype_expression (e:O.expression) : (I.expression) result =
     let%bind r' = bind_smap
       @@ Map.String.map untype_expression r in
     return (e_record r')
-  | E_record_accessor {expr; label} ->
-      let%bind r' = untype_expression expr in
+  | E_record_accessor {record; label} ->
+      let%bind r' = untype_expression record in
       let Label s = label in
       return (e_accessor r' s)
   | E_record_update {record=r; path=l; update=e} ->
diff --git a/src/passes/9-self_ast_typed/helpers.ml b/src/passes/9-self_ast_typed/helpers.ml
index 2da8a766e..90a9fe9cc 100644
--- a/src/passes/9-self_ast_typed/helpers.ml
+++ b/src/passes/9-self_ast_typed/helpers.ml
@@ -48,8 +48,8 @@ let rec fold_expression : 'a folder -> 'a -> expression -> 'a result = fun f ini
     let%bind res = fold_expression self res update in
     ok res 
   )
-  | E_record_accessor {expr} -> (
-     let%bind res = self init' expr in
+  | E_record_accessor {record} -> (
+     let%bind res = self init' record in
      ok res
     )
   | E_let_in { let_binder = _ ; rhs ; let_result } -> (
@@ -119,8 +119,8 @@ let rec map_expression : mapper -> expression -> expression result = fun f e ->
       return @@ E_matching {matchee=e';cases=cases'}
     )
   | E_record_accessor acc -> (
-      let%bind e' = self acc.expr in
-      return @@ E_record_accessor {acc with expr = e'}
+      let%bind e' = self acc.record in
+      return @@ E_record_accessor {acc with record = e'}
     )
   | E_record m -> (
     let%bind m' = bind_map_lmap self m in
@@ -234,8 +234,8 @@ let rec fold_map_expression : 'a fold_mapper -> 'a -> expression -> ('a * expres
       ok (res, return @@ E_matching {matchee=e';cases=cases'})
     )
   | E_record_accessor acc -> (
-      let%bind (res, e') = self init' acc.expr in
-      ok (res, return @@ E_record_accessor {acc with expr = e'})
+      let%bind (res, e') = self init' acc.record in
+      ok (res, return @@ E_record_accessor {acc with record = e'})
     )
   | E_record m -> (
     let%bind (res, lst') = bind_fold_map_list (fun res (k,e) -> let%bind (res,e) = self res e in ok (res,(k,e))) init' (LMap.to_kv_list m) in
diff --git a/src/passes/9-self_ast_typed/tail_recursion.ml b/src/passes/9-self_ast_typed/tail_recursion.ml
index 610484a38..5e3953bc3 100644
--- a/src/passes/9-self_ast_typed/tail_recursion.ml
+++ b/src/passes/9-self_ast_typed/tail_recursion.ml
@@ -49,8 +49,8 @@ let rec check_recursive_call : expression_variable -> bool -> expression -> unit
     let es = LMap.to_list elm in
     let%bind _ = bind_map_list (check_recursive_call n false) es in
     ok ()
-  | E_record_accessor {expr;_} ->
-    let%bind _ = check_recursive_call n false expr in
+  | E_record_accessor {record;_} ->
+    let%bind _ = check_recursive_call n false record in
     ok ()
   | E_record_update {record;update;_} ->
     let%bind _ = check_recursive_call n false record in
diff --git a/src/stages/1-ast_imperative/PP.ml b/src/stages/1-ast_imperative/PP.ml
index d25b84dee..1c8a243ff 100644
--- a/src/stages/1-ast_imperative/PP.ml
+++ b/src/stages/1-ast_imperative/PP.ml
@@ -27,8 +27,8 @@ and expression_content ppf (ec : expression_content) =
         c.arguments
   | E_record m ->
       fprintf ppf "%a" (tuple_or_record_sep_expr expression) m
-  | E_record_accessor ra ->
-      fprintf ppf "%a.%a" expression ra.expr label ra.label
+  | E_record_accessor {record; label=l}->
+      fprintf ppf "%a.%a" expression record label l
   | E_record_update {record; path; update} ->
       fprintf ppf "{ %a with { %a = %a } }" expression record label path expression update
   | E_map m ->
@@ -57,15 +57,20 @@ and expression_content ppf (ec : expression_content) =
         expression_variable fun_name 
         type_expression fun_type
         expression_content (E_lambda lambda)
-  | E_let_in { let_binder ; mut; rhs ; let_result; inline } ->    
-      fprintf ppf "let %a%a = %a%a in %a" option_mut mut option_type_name let_binder expression rhs option_inline inline expression let_result
+  | E_let_in { let_binder ; rhs ; let_result; inline } ->    
+      fprintf ppf "let %a = %a%a in %a" option_type_name let_binder expression rhs option_inline inline expression let_result
   | E_ascription {anno_expr; type_annotation} ->
       fprintf ppf "%a : %a" expression anno_expr type_expression
         type_annotation
   | E_sequence {expr1;expr2} ->
-      fprintf ppf "%a;\n%a" expression expr1 expression expr2
+      fprintf ppf "{ %a; @. %a}" expression expr1 expression expr2
   | E_skip ->
       fprintf ppf "skip"
+  | E_assign {variable; access_path; expression=e} ->
+      fprintf ppf "%a%a := %a" 
+        expression_variable variable
+        (list_sep (fun ppf a -> fprintf ppf ".%a" accessor a) (fun ppf () -> fprintf ppf "")) access_path
+        expression e
   | E_for {binder; start; final; increment; body} ->
       fprintf ppf "for %a from %a to %a by %a do %a" 
         expression_variable binder
@@ -83,6 +88,12 @@ and expression_content ppf (ec : expression_content) =
         expression condition
         expression body
     
+and accessor ppf a =
+  match a with
+    | Access_tuple i  -> fprintf ppf "%d" i
+    | Access_record s -> fprintf ppf "%s" s
+    | Access_map e    -> fprintf ppf "%a" expression e
+
 and option_map ppf (k,v_opt) =
   match v_opt with
   | None -> fprintf ppf "%a" expression_variable k
diff --git a/src/stages/1-ast_imperative/combinators.ml b/src/stages/1-ast_imperative/combinators.ml
index 47ec55fb6..bc66d4ac0 100644
--- a/src/stages/1-ast_imperative/combinators.ml
+++ b/src/stages/1-ast_imperative/combinators.ml
@@ -118,12 +118,12 @@ let e_list ?loc lst : expression = make_expr ?loc @@ E_list lst
 let e_constructor ?loc s a : expression = make_expr ?loc @@ E_constructor { constructor = Constructor s; element = a}
 let e_matching ?loc a b : expression = make_expr ?loc @@ E_matching {matchee=a;cases=b}
 let e_matching_bool ?loc a b c : expression = e_matching ?loc a (Match_bool {match_true = b ; match_false = c})
-let e_accessor ?loc a b = make_expr ?loc @@ E_record_accessor {expr = a; label= Label b}
+let e_accessor ?loc a b = make_expr ?loc @@ E_record_accessor {record = a; label= Label b}
 let e_accessor_list ?loc a b  = List.fold_left (fun a b -> e_accessor ?loc a b) a b
 let e_variable ?loc v = make_expr ?loc @@ E_variable v
 let e_skip ?loc () = make_expr ?loc @@ E_skip
-let e_let_in ?loc (binder, ascr) mut inline rhs let_result = 
-  make_expr ?loc @@ E_let_in { let_binder = (binder, ascr) ; mut; rhs ; let_result; inline }
+let e_let_in ?loc (binder, ascr) inline rhs let_result = 
+  make_expr ?loc @@ E_let_in { let_binder = (binder, ascr) ; rhs ; let_result; inline }
 let e_annotation ?loc anno_expr ty = make_expr ?loc @@ E_ascription {anno_expr; type_annotation = ty}
 let e_application ?loc a b = make_expr ?loc @@ E_application {lamb=a ; args=b}
 let e_binop ?loc name a b  = make_expr ?loc @@ E_constant {cons_name = name ; arguments = [a ; b]}
@@ -191,24 +191,16 @@ let e_lambda ?loc (binder : expression_variable)
 let e_recursive ?loc fun_name fun_type lambda = make_expr ?loc @@ E_recursive {fun_name; fun_type; lambda}
 
 
-let e_assign_with_let ?loc var access_path expr = 
-  let var = Var.of_name (var) in
-  match access_path with 
-  | [] -> (var, None), true, expr, false
-
-  | lst -> 
-    let rec aux path record= match path with 
-    | [] -> failwith "acces_path cannot be empty"
-    | [e] -> e_update ?loc record e expr
-    | elem::tail -> 
-      let next_record = e_accessor record elem in
-      e_update ?loc record elem (aux tail next_record )
-    in 
-    (var, None), true, (aux lst (e_variable var)), false
+let e_assign ?loc variable access_path expression =
+  make_expr ?loc @@ E_assign {variable;access_path;expression} 
+let e_ez_assign ?loc variable access_path expression = 
+  let variable = Var.of_name variable in
+  let access_path = List.map (fun s -> Access_record s) access_path in
+  e_assign ?loc variable access_path expression 
 
 let get_e_accessor = fun t ->
   match t with
-  | E_record_accessor {expr; label} -> ok (expr , label)
+  | E_record_accessor {record; label} -> ok (record , label)
   | _ -> simple_fail "not an accessor"
 
 let assert_e_accessor = fun t ->
diff --git a/src/stages/1-ast_imperative/combinators.mli b/src/stages/1-ast_imperative/combinators.mli
index 4d5c4db7a..1cf5986c9 100644
--- a/src/stages/1-ast_imperative/combinators.mli
+++ b/src/stages/1-ast_imperative/combinators.mli
@@ -86,7 +86,7 @@ val e_variable : ?loc:Location.t -> expression_variable -> expression
 val e_skip : ?loc:Location.t -> unit -> expression
 val e_sequence : ?loc:Location.t -> expression -> expression -> expression
 val e_cond: ?loc:Location.t -> expression -> expression -> expression -> expression
-val e_let_in : ?loc:Location.t -> ( expression_variable * type_expression option ) -> bool -> bool -> expression -> expression -> expression
+val e_let_in : ?loc:Location.t -> ( expression_variable * type_expression option ) -> bool -> expression -> expression -> expression
 val e_annotation : ?loc:Location.t -> expression -> type_expression -> expression
 val e_application : ?loc:Location.t -> expression -> expression -> expression
 val e_binop    : ?loc:Location.t -> constant' -> expression -> expression -> expression
@@ -110,7 +110,8 @@ val e_lambda : ?loc:Location.t -> expression_variable -> type_expression option
 val e_recursive : ?loc:Location.t -> expression_variable -> type_expression -> lambda -> expression
 val e_record : ?loc:Location.t -> expr Map.String.t -> expression
 val e_update : ?loc:Location.t -> expression -> string -> expression -> expression
-val e_assign_with_let : ?loc:Location.t -> string -> string list -> expression -> ((expression_variable*type_expression option)*bool*expression*bool)
+val e_assign : ?loc:Location.t -> expression_variable -> access list -> expression -> expression
+val e_ez_assign : ?loc:Location.t -> string -> string list -> expression -> expression
 
 (*
 val get_e_accessor : expression' -> ( expression * access_path ) result
diff --git a/src/stages/1-ast_imperative/misc.ml b/src/stages/1-ast_imperative/misc.ml
index 54e0303cf..7a2615e04 100644
--- a/src/stages/1-ast_imperative/misc.ml
+++ b/src/stages/1-ast_imperative/misc.ml
@@ -185,6 +185,7 @@ let rec assert_value_eq (a, b: (expression * expression )) : unit result =
   | (E_recursive _,_) | (E_record_accessor _, _)
   | (E_look_up _, _) | (E_matching _, _)
   | (E_sequence _, _) | (E_skip, _) 
+  | (E_assign _, _)
   | (E_for _, _) | (E_for_each _, _)
   | (E_while _, _) -> simple_fail "comparing not a value"
 
diff --git a/src/stages/1-ast_imperative/types.ml b/src/stages/1-ast_imperative/types.ml
index 08200dbd7..480d612fb 100644
--- a/src/stages/1-ast_imperative/types.ml
+++ b/src/stages/1-ast_imperative/types.ml
@@ -55,6 +55,7 @@ and expression_content =
   | E_set of expression list
   | E_look_up of (expression * expression)
   (* Imperative *)
+  | E_assign of assign
   | E_for of for_
   | E_for_each of for_each
   | E_while of while_loop
@@ -82,14 +83,13 @@ and recursive = {
 
 and let_in =
   { let_binder: expression_variable * type_expression option
-  ; mut: bool
   ; rhs: expression
   ; let_result: expression
   ; inline: bool }
 
 and constructor = {constructor: constructor'; element: expression}
 
-and accessor = {expr: expression; label: label}
+and accessor = {record: expression; label: label}
 
 and update = {record: expression; path: label ; update: expression}
 
@@ -105,6 +105,17 @@ and sequence = {
   expr2: expression ;
   }
 
+and assign = {
+  variable : expression_variable;
+  access_path : access list;
+  expression : expression;
+}
+
+and access =
+  | Access_tuple of int
+  | Access_record of string
+  | Access_map of expr
+
 and for_ = {
   binder : expression_variable;
   start : expression;
diff --git a/src/stages/2-ast_sugar/PP.ml b/src/stages/2-ast_sugar/PP.ml
index 1b65a8046..ca4184aff 100644
--- a/src/stages/2-ast_sugar/PP.ml
+++ b/src/stages/2-ast_sugar/PP.ml
@@ -28,7 +28,7 @@ and expression_content ppf (ec : expression_content) =
   | E_record m ->
       fprintf ppf "%a" (tuple_or_record_sep_expr expression) m
   | E_record_accessor ra ->
-      fprintf ppf "%a.%a" expression ra.expr label ra.label
+      fprintf ppf "%a.%a" expression ra.record label ra.label
   | E_record_update {record; path; update} ->
       fprintf ppf "{ %a with { %a = %a } }" expression record label path expression update
   | E_map m ->
@@ -64,7 +64,7 @@ and expression_content ppf (ec : expression_content) =
         option_inline inline 
         expression let_result
   | E_sequence {expr1;expr2} ->
-      fprintf ppf "{ %a; %a }" expression expr1 expression expr2
+      fprintf ppf "{ %a; @. %a}" expression expr1 expression expr2
   | E_ascription {anno_expr; type_annotation} ->
       fprintf ppf "%a : %a" expression anno_expr type_expression type_annotation
   | E_skip ->
diff --git a/src/stages/2-ast_sugar/combinators.ml b/src/stages/2-ast_sugar/combinators.ml
index f53344c37..d5099ab28 100644
--- a/src/stages/2-ast_sugar/combinators.ml
+++ b/src/stages/2-ast_sugar/combinators.ml
@@ -107,33 +107,27 @@ let e_bytes_raw ?loc (b: bytes) : expression =
   make_expr ?loc @@ E_literal (Literal_bytes b)
 let e_bytes_string ?loc (s: string) : expression =
   make_expr ?loc @@ E_literal (Literal_bytes (Hex.to_bytes (Hex.of_string s)))
-let e_big_map ?loc lst : expression = make_expr ?loc @@ E_big_map lst
 let e_some ?loc s  : expression = make_expr ?loc @@ E_constant {cons_name = C_SOME; arguments = [s]}
 let e_none ?loc () : expression = make_expr ?loc @@ E_constant {cons_name = C_NONE; arguments = []}
-let e_string_cat ?loc sl sr : expression = make_expr ?loc @@ E_constant {cons_name = C_CONCAT; arguments = [sl ; sr ]}
-let e_map_add ?loc k v old  : expression = make_expr ?loc @@ E_constant {cons_name = C_MAP_ADD; arguments = [k ; v ; old]}
-let e_map ?loc lst : expression = make_expr ?loc @@ E_map lst
-let e_set ?loc lst : expression = make_expr ?loc @@ E_set lst
-let e_list ?loc lst : expression = make_expr ?loc @@ E_list lst
 let e_constructor ?loc s a : expression = make_expr ?loc @@ E_constructor { constructor = Constructor s; element = a}
 let e_matching ?loc a b : expression = make_expr ?loc @@ E_matching {matchee=a;cases=b}
 let e_matching_bool ?loc a b c : expression = e_matching ?loc a (Match_bool {match_true = b ; match_false = c})
-let e_accessor ?loc a b = make_expr ?loc @@ E_record_accessor {expr = a; label= Label b}
-let e_accessor_list ?loc a b  = List.fold_left (fun a b -> e_accessor ?loc a b) a b
 let e_variable ?loc v = make_expr ?loc @@ E_variable v
-let e_skip ?loc () = make_expr ?loc @@ E_skip
 let e_let_in ?loc (binder, ascr) mut inline rhs let_result = 
   make_expr ?loc @@ E_let_in { let_binder = (binder, ascr) ; rhs ; let_result; inline; mut }
-let e_annotation ?loc anno_expr ty = make_expr ?loc @@ E_ascription {anno_expr; type_annotation = ty}
 let e_application ?loc a b = make_expr ?loc @@ E_application {lamb=a ; args=b}
-let e_binop ?loc name a b  = make_expr ?loc @@ E_constant {cons_name = name ; arguments = [a ; b]}
 let e_constant ?loc name lst = make_expr ?loc @@ E_constant {cons_name=name ; arguments = lst}
-let e_look_up ?loc x y = make_expr ?loc @@ E_look_up (x , y)
+
+let e_annotation ?loc anno_expr ty = make_expr ?loc @@ E_ascription {anno_expr; type_annotation = ty}
+
 let e_sequence ?loc expr1 expr2 = make_expr ?loc @@ E_sequence {expr1; expr2}
-let e_cond ?loc expr match_true match_false = e_matching expr ?loc (Match_bool {match_true; match_false})
-(*
-let e_assign ?loc a b c = location_wrap ?loc @@ E_assign (Var.of_name a , b , c) (* TODO handlethat*)
-*)
+let e_skip ?loc () = make_expr ?loc @@ E_skip
+
+let e_list ?loc lst : expression = make_expr ?loc @@ E_list lst
+let e_set ?loc lst : expression = make_expr ?loc @@ E_set lst
+let e_map ?loc lst : expression = make_expr ?loc @@ E_map lst
+let e_big_map ?loc lst : expression = make_expr ?loc @@ E_big_map lst
+
 let ez_match_variant (lst : ((string * string) * 'a) list) =
   let lst = List.map (fun ((c,n),a) -> ((Constructor c, Var.of_name n), a) ) lst in
   Match_variant (lst,())
@@ -145,19 +139,20 @@ let e_record_ez ?loc (lst : (string * expr) list) : expression =
 let e_record ?loc map =
   let lst = Map.String.to_kv_list map in
   e_record_ez ?loc lst 
+let e_record_accessor ?loc a b = make_expr ?loc @@ E_record_accessor {record = a; label= Label b}
 
-let e_update ?loc record path update = 
+let e_record_update ?loc record path update = 
   let path = Label path in
   make_expr ?loc @@ E_record_update {record; path; update}
 
-let e_tuple ?loc lst : expression = e_record_ez ?loc (tuple_to_record lst)
-let e_pair ?loc a b  : expression = e_tuple ?loc [a;b]
-
 let make_option_typed ?loc e t_opt =
   match t_opt with
   | None -> e
   | Some t -> e_annotation ?loc e t
 
+let e_cond ?loc expr match_true match_false = e_matching expr ?loc (Match_bool {match_true; match_false})
+let e_tuple ?loc lst : expression = e_record_ez ?loc (tuple_to_record lst)
+let e_pair ?loc a b  : expression = e_tuple ?loc [a;b]
 
 let e_typed_none ?loc t_opt =
   let type_annotation = t_option t_opt in
@@ -185,25 +180,9 @@ let e_lambda ?loc (binder : expression_variable)
   }
 let e_recursive ?loc fun_name fun_type lambda = make_expr ?loc @@ E_recursive {fun_name; fun_type; lambda}
 
-
-let e_assign_with_let ?loc var access_path expr = 
-  let var = Var.of_name (var) in
-  match access_path with 
-  | [] -> (var, None), true, expr, false
-
-  | lst -> 
-    let rec aux path record= match path with 
-    | [] -> failwith "acces_path cannot be empty"
-    | [e] -> e_update ?loc record e expr
-    | elem::tail -> 
-      let next_record = e_accessor record elem in
-      e_update ?loc record elem (aux tail next_record )
-    in 
-    (var, None), true, (aux lst (e_variable var)), false
-
 let get_e_accessor = fun t ->
   match t with
-  | E_record_accessor {expr; label} -> ok (expr , label)
+  | E_record_accessor {record; label} -> ok (record , label)
   | _ -> simple_fail "not an accessor"
 
 let assert_e_accessor = fun t ->
diff --git a/src/stages/2-ast_sugar/combinators.mli b/src/stages/2-ast_sugar/combinators.mli
index ca2f2d552..d790512f6 100644
--- a/src/stages/2-ast_sugar/combinators.mli
+++ b/src/stages/2-ast_sugar/combinators.mli
@@ -65,34 +65,34 @@ val e'_bytes : string -> expression_content result
 val e_bytes_hex : ?loc:Location.t -> string -> expression result
 val e_bytes_raw : ?loc:Location.t -> bytes -> expression
 val e_bytes_string : ?loc:Location.t -> string -> expression
-val e_big_map : ?loc:Location.t -> ( expr * expr ) list -> expression
-
-val e_record_ez  : ?loc:Location.t -> ( string * expr ) list -> expression
-val e_tuple : ?loc:Location.t -> expression list -> expression
 val e_some : ?loc:Location.t -> expression -> expression
 val e_none : ?loc:Location.t -> unit -> expression
-val e_string_cat : ?loc:Location.t -> expression -> expression -> expression
-val e_map_add : ?loc:Location.t -> expression -> expression ->  expression -> expression
-val e_map : ?loc:Location.t -> ( expression * expression ) list -> expression
-val e_set : ?loc:Location.t -> expression list -> expression
-val e_list : ?loc:Location.t -> expression list -> expression
-val e_pair : ?loc:Location.t -> expression -> expression -> expression
+
+val e_variable : ?loc:Location.t -> expression_variable -> expression
 val e_constructor : ?loc:Location.t -> string -> expression -> expression
+val e_constant : ?loc:Location.t -> constant' -> expression list -> expression
+
+val e_lambda : ?loc:Location.t -> expression_variable -> type_expression option -> type_expression option -> expression -> expression
+val e_application : ?loc:Location.t -> expression -> expression -> expression
+val e_recursive : ?loc:Location.t -> expression_variable -> type_expression -> lambda -> expression
+val e_let_in : ?loc:Location.t -> ( expression_variable * type_expression option ) -> bool -> bool -> expression -> expression -> expression
+
+val e_record : ?loc:Location.t -> expr Map.String.t -> expression
+val e_record_update : ?loc:Location.t -> expression -> string -> expression -> expression
+val e_record_accessor : ?loc:Location.t -> expression -> string -> expression
+
+val e_annotation : ?loc:Location.t -> expression -> type_expression -> expression
+
+val e_sequence : ?loc:Location.t -> expression -> expression -> expression
+val e_skip : ?loc:Location.t -> unit -> expression
+
+val e_list : ?loc:Location.t -> expression list -> expression
+val e_set : ?loc:Location.t -> expression list -> expression
+val e_map : ?loc:Location.t -> ( expression * expression ) list -> expression
+val e_big_map : ?loc:Location.t -> ( expr * expr ) list -> expression
+
 val e_matching : ?loc:Location.t -> expression -> matching_expr -> expression
 val e_matching_bool : ?loc:Location.t -> expression -> expression -> expression -> expression
-val e_accessor : ?loc:Location.t -> expression -> string -> expression
-val e_accessor_list : ?loc:Location.t -> expression -> string list -> expression
-val e_variable : ?loc:Location.t -> expression_variable -> expression
-val e_skip : ?loc:Location.t -> unit -> expression
-val e_sequence : ?loc:Location.t -> expression -> expression -> expression
-val e_cond: ?loc:Location.t -> expression -> expression -> expression -> expression
-val e_let_in : ?loc:Location.t -> ( expression_variable * type_expression option ) -> bool -> bool -> expression -> expression -> expression
-val e_annotation : ?loc:Location.t -> expression -> type_expression -> expression
-val e_application : ?loc:Location.t -> expression -> expression -> expression
-val e_binop    : ?loc:Location.t -> constant' -> expression -> expression -> expression
-val e_constant : ?loc:Location.t -> constant' -> expression list -> expression
-val e_look_up : ?loc:Location.t -> expression -> expression -> expression
-val ez_match_variant : ((string * string ) * 'a ) list -> ('a,unit) matching_content
 val e_matching_variant : ?loc:Location.t -> expression -> ((string * string) * expression) list -> expression
 
 val make_option_typed : ?loc:Location.t -> expression -> type_expression option -> expression
@@ -103,15 +103,12 @@ val e_typed_list : ?loc:Location.t -> expression list -> type_expression -> expr
 
 val e_typed_map : ?loc:Location.t -> ( expression * expression ) list  -> type_expression -> type_expression -> expression
 val e_typed_big_map : ?loc:Location.t -> ( expression * expression ) list  -> type_expression -> type_expression -> expression
-
 val e_typed_set : ?loc:Location.t -> expression list -> type_expression -> expression
 
-val e_lambda : ?loc:Location.t -> expression_variable -> type_expression option -> type_expression option -> expression -> expression
-val e_recursive : ?loc:Location.t -> expression_variable -> type_expression -> lambda -> expression
-val e_record : ?loc:Location.t -> expr Map.String.t -> expression
-val e_update : ?loc:Location.t -> expression -> string -> expression -> expression
-val e_assign_with_let : ?loc:Location.t -> string -> string list -> expression -> ((expression_variable*type_expression option)*bool*expression*bool)
-
+val e_record_ez : ?loc:Location.t -> (string * expression) list -> expression
+val e_cond: ?loc:Location.t -> expression -> expression -> expression -> expression
+val e_tuple : ?loc:Location.t -> expression list -> expression
+val e_pair : ?loc:Location.t -> expression -> expression -> expression
 (*
 val get_e_accessor : expression' -> ( expression * access_path ) result
 *)
diff --git a/src/stages/2-ast_sugar/types.ml b/src/stages/2-ast_sugar/types.ml
index 658d30e35..5ad052e46 100644
--- a/src/stages/2-ast_sugar/types.ml
+++ b/src/stages/2-ast_sugar/types.ml
@@ -86,7 +86,7 @@ and let_in = {
 
 and constructor = {constructor: constructor'; element: expression}
 
-and accessor = {expr: expression; label: label}
+and accessor = {record: expression; label: label}
 
 and update = {record: expression; path: label ; update: expression}
 
diff --git a/src/stages/3-ast_core/PP.ml b/src/stages/3-ast_core/PP.ml
index 3410a96fb..0d648065e 100644
--- a/src/stages/3-ast_core/PP.ml
+++ b/src/stages/3-ast_core/PP.ml
@@ -28,7 +28,7 @@ and expression_content ppf (ec : expression_content) =
   | E_record m ->
       fprintf ppf "%a" (tuple_or_record_sep_expr expression) m
   | E_record_accessor ra ->
-      fprintf ppf "%a.%a" expression ra.expr label ra.label
+      fprintf ppf "%a.%a" expression ra.record label ra.label
   | E_record_update {record; path; update} ->
       fprintf ppf "{ %a with { %a = %a } }" expression record label path expression update
   | E_map m ->
diff --git a/src/stages/3-ast_core/combinators.ml b/src/stages/3-ast_core/combinators.ml
index db2417902..90d1cebd8 100644
--- a/src/stages/3-ast_core/combinators.ml
+++ b/src/stages/3-ast_core/combinators.ml
@@ -118,7 +118,7 @@ let e_list ?loc lst : expression = make_expr ?loc @@ E_list lst
 let e_constructor ?loc s a : expression = make_expr ?loc @@ E_constructor { constructor = Constructor s; element = a}
 let e_matching ?loc a b : expression = make_expr ?loc @@ E_matching {matchee=a;cases=b}
 let e_matching_bool ?loc a b c : expression = e_matching ?loc a (Match_bool {match_true = b ; match_false = c})
-let e_accessor ?loc a b = make_expr ?loc @@ E_record_accessor {expr = a; label= Label b}
+let e_accessor ?loc a b = make_expr ?loc @@ E_record_accessor {record = a; label= Label b}
 let e_accessor_list ?loc a b  = List.fold_left (fun a b -> e_accessor ?loc a b) a b
 let e_variable ?loc v = make_expr ?loc @@ E_variable v
 let e_let_in ?loc (binder, ascr) inline rhs let_result = 
@@ -201,7 +201,7 @@ let e_assign_with_let ?loc var access_path expr =
 
 let get_e_accessor = fun t ->
   match t with
-  | E_record_accessor {expr; label} -> ok (expr , label)
+  | E_record_accessor {record; label} -> ok (record , label)
   | _ -> simple_fail "not an accessor"
 
 let assert_e_accessor = fun t ->
diff --git a/src/stages/3-ast_core/types.ml b/src/stages/3-ast_core/types.ml
index 2b8f0dbc2..81ba90fa2 100644
--- a/src/stages/3-ast_core/types.ml
+++ b/src/stages/3-ast_core/types.ml
@@ -82,7 +82,7 @@ and let_in =
 
 and constructor = {constructor: constructor'; element: expression}
 
-and accessor = {expr: expression; label: label}
+and accessor = {record: expression; label: label}
 
 and update = {record: expression; path: label ; update: expression}
 
diff --git a/src/stages/4-ast_typed/PP.ml b/src/stages/4-ast_typed/PP.ml
index 1325d0476..ab655c80b 100644
--- a/src/stages/4-ast_typed/PP.ml
+++ b/src/stages/4-ast_typed/PP.ml
@@ -29,7 +29,7 @@ and expression_content ppf (ec: expression_content) =
   | E_record m ->
       fprintf ppf "%a" (tuple_or_record_sep_expr expression) m
   | E_record_accessor ra ->
-      fprintf ppf "%a.%a" expression ra.expr label ra.label
+      fprintf ppf "%a.%a" expression ra.record label ra.label
   | E_record_update {record; path; update} ->
       fprintf ppf "{ %a with { %a = %a } }" expression record label path expression update
   | E_map m ->
diff --git a/src/stages/4-ast_typed/combinators.ml b/src/stages/4-ast_typed/combinators.ml
index 014ab8f2f..5abb2a2bc 100644
--- a/src/stages/4-ast_typed/combinators.ml
+++ b/src/stages/4-ast_typed/combinators.ml
@@ -337,7 +337,7 @@ let get_a_bool (t:expression) =
 
 let get_a_record_accessor = fun t ->
   match t.expression_content with
-  | E_record_accessor {expr ; label} -> ok (expr , label)
+  | E_record_accessor {record ; label} -> ok (record , label)
   | _ -> simple_fail "not an accessor"
 
 let get_declaration_by_name : program -> string -> declaration result = fun p name ->
diff --git a/src/stages/4-ast_typed/misc.ml b/src/stages/4-ast_typed/misc.ml
index 04efcca5f..533520fe7 100644
--- a/src/stages/4-ast_typed/misc.ml
+++ b/src/stages/4-ast_typed/misc.ml
@@ -209,7 +209,7 @@ module Free_variables = struct
     | E_application {lamb;args} -> unions @@ List.map self [ lamb ; args ]
     | E_constructor {element;_} -> self element
     | E_record m -> unions @@ List.map self @@ LMap.to_list m
-    | E_record_accessor {expr;_} -> self expr
+    | E_record_accessor {record;_} -> self record
     | E_record_update {record; update;_} -> union (self record) @@ self update
     | E_list lst -> unions @@ List.map self lst
     | E_set lst -> unions @@ List.map self lst
diff --git a/src/stages/4-ast_typed/misc_smart.ml b/src/stages/4-ast_typed/misc_smart.ml
index 0040f7d90..1d1110a1c 100644
--- a/src/stages/4-ast_typed/misc_smart.ml
+++ b/src/stages/4-ast_typed/misc_smart.ml
@@ -70,7 +70,7 @@ module Captured_variables = struct
     | E_record m ->
       let%bind lst' = bind_map_list self @@ LMap.to_list m in
       ok @@ unions lst'
-    | E_record_accessor {expr;_} -> self expr
+    | E_record_accessor {record;_} -> self record
     | E_record_update {record;update;_} -> 
       let%bind r = self record in
       let%bind e = self update in
diff --git a/src/stages/4-ast_typed/types.ml b/src/stages/4-ast_typed/types.ml
index fdb24969b..5fbe79554 100644
--- a/src/stages/4-ast_typed/types.ml
+++ b/src/stages/4-ast_typed/types.ml
@@ -92,7 +92,7 @@ and constructor = {
   }
 
 and accessor = {
-    expr: expression ;
+    record: expression ;
     label: label ;
   }
 
diff --git a/src/stages/typesystem/misc.ml b/src/stages/typesystem/misc.ml
index 4b60cf454..affe9fd37 100644
--- a/src/stages/typesystem/misc.ml
+++ b/src/stages/typesystem/misc.ml
@@ -182,10 +182,10 @@ module Substitution = struct
          *     let val_ = s_expression ~v ~expr val_ in
          *     ok @@ (key , val_)) aemap in
          * ok @@ T.E_record aemap *)
-      | T.E_record_accessor {expr=e;label} ->
-        let%bind expr = s_expression ~substs e in
+      | T.E_record_accessor {record=e;label} ->
+        let%bind record = s_expression ~substs e in
         let%bind label = s_label ~substs label in
-        ok @@ T.E_record_accessor {expr;label}
+        ok @@ T.E_record_accessor {record;label}
       | T.E_record_update {record;path;update}->
         let%bind record = s_expression ~substs record in
         let%bind update = s_expression ~substs update in
diff --git a/src/test/multisig_v2_tests.ml b/src/test/multisig_v2_tests.ml
index 8b2b8972b..24912c289 100644
--- a/src/test/multisig_v2_tests.ml
+++ b/src/test/multisig_v2_tests.ml
@@ -33,7 +33,7 @@ let empty_message = e_lambda (Var.of_name "arguments")
   empty_op_list
 let empty_message2 = e_lambda (Var.of_name "arguments")
   (Some t_bytes) (Some (t_list t_operation))
- ( e_let_in ((Var.of_name "foo"),Some t_unit) false false (e_unit ()) empty_op_list)
+ ( e_let_in ((Var.of_name "foo"),Some t_unit) false (e_unit ()) empty_op_list)
 
 let send_param msg = e_constructor "Send" msg
 let withdraw_param = e_constructor "Withdraw" empty_message

From d91753e4934618726a7f96427b8047b25747791b Mon Sep 17 00:00:00 2001
From: Pierre-Emmanuel Wulfman <pierre.emmanuel.wulfman@gmail.com>
Date: Mon, 30 Mar 2020 14:40:28 +0200
Subject: [PATCH 2/2] remove case e_sequance (e_assing, expr)

---
 src/bin/expect_tests/contract_tests.ml                  | 4 ++--
 src/passes/4-imperative_to_sugar/imperative_to_sugar.ml | 4 ----
 2 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/bin/expect_tests/contract_tests.ml b/src/bin/expect_tests/contract_tests.ml
index 3e78f213c..311d96b41 100644
--- a/src/bin/expect_tests/contract_tests.ml
+++ b/src/bin/expect_tests/contract_tests.ml
@@ -1114,7 +1114,7 @@ let%expect_test _ =
 let%expect_test _ =
   run_ligo_bad [ "compile-contract" ; bad_contract "create_contract_toplevel.mligo" ; "main" ] ;
   [%expect {|
-ligo: in file "create_contract_toplevel.mligo", line 4, character 35 to line 8, character 8. No free variable allowed in this lambda: variable 'store' {"expression":"CREATE_CONTRACT(lambda (#P:Some(( nat * string ))) : None return let rhs#701 = #P in let p = rhs#701.0 in let s = rhs#701.1 in ( list[] : (TO_list(operation)) , store ) , NONE() : (TO_option(key_hash)) , 300000000mutez , \"un\")","location":"in file \"create_contract_toplevel.mligo\", line 4, character 35 to line 8, character 8"}
+ligo: in file "create_contract_toplevel.mligo", line 4, character 35 to line 8, character 8. No free variable allowed in this lambda: variable 'store' {"expression":"CREATE_CONTRACT(lambda (#P:Some(( nat * string ))) : None return let rhs#702 = #P in let p = rhs#702.0 in let s = rhs#702.1 in ( list[] : (TO_list(operation)) , store ) , NONE() : (TO_option(key_hash)) , 300000000mutez , \"un\")","location":"in file \"create_contract_toplevel.mligo\", line 4, character 35 to line 8, character 8"}
 
 
  If you're not sure how to fix this error, you can
@@ -1127,7 +1127,7 @@ ligo: in file "create_contract_toplevel.mligo", line 4, character 35 to line 8,
 
   run_ligo_bad [ "compile-contract" ; bad_contract "create_contract_var.mligo" ; "main" ] ;
   [%expect {|
-ligo: in file "create_contract_var.mligo", line 6, character 35 to line 10, character 5. No free variable allowed in this lambda: variable 'a' {"expression":"CREATE_CONTRACT(lambda (#P:Some(( nat * int ))) : None return let rhs#704 = #P in let p = rhs#704.0 in let s = rhs#704.1 in ( list[] : (TO_list(operation)) , a ) , NONE() : (TO_option(key_hash)) , 300000000mutez , 1)","location":"in file \"create_contract_var.mligo\", line 6, character 35 to line 10, character 5"}
+ligo: in file "create_contract_var.mligo", line 6, character 35 to line 10, character 5. No free variable allowed in this lambda: variable 'a' {"expression":"CREATE_CONTRACT(lambda (#P:Some(( nat * int ))) : None return let rhs#705 = #P in let p = rhs#705.0 in let s = rhs#705.1 in ( list[] : (TO_list(operation)) , a ) , NONE() : (TO_option(key_hash)) , 300000000mutez , 1)","location":"in file \"create_contract_var.mligo\", line 6, character 35 to line 10, character 5"}
 
 
  If you're not sure how to fix this error, you can
diff --git a/src/passes/4-imperative_to_sugar/imperative_to_sugar.ml b/src/passes/4-imperative_to_sugar/imperative_to_sugar.ml
index 33c56626b..2ac37fc71 100644
--- a/src/passes/4-imperative_to_sugar/imperative_to_sugar.ml
+++ b/src/passes/4-imperative_to_sugar/imperative_to_sugar.ml
@@ -231,10 +231,6 @@ let rec compile_expression : I.expression -> O.expression result =
       let%bind anno_expr = compile_expression anno_expr in
       let%bind type_annotation = compile_type_expression type_annotation in
       return @@ O.E_ascription {anno_expr; type_annotation}
-    | I.E_sequence {expr1={expression_content=I.E_assign expr1;_}; expr2} ->
-      let%bind expr2 = compile_expression expr2 in
-      let%bind ret = compile_assign expr1 @@ expr2 in
-      return @@ ret
     | I.E_sequence {expr1; expr2} ->
       let%bind expr1 = compile_expression expr1 in
       let%bind expr2 = compile_expression expr2 in