Replaced expression "copy ... with ..." by instruction "patch ... with".

AST.ml

@@ -42,7 +42,6 @@ let sepseq_to_region to_region = function
 type kwd_begin      = Region.t
 type kwd_case       = Region.t
 type kwd_const      = Region.t
-type kwd_copy       = Region.t
 type kwd_down       = Region.t
 type kwd_else       = Region.t
 type kwd_end        = Region.t
@@ -56,6 +55,7 @@ type kwd_is         = Region.t
 type kwd_mod        = Region.t
 type kwd_not        = Region.t
 type kwd_of         = Region.t
+type kwd_patch      = Region.t
 type kwd_procedure  = Region.t
 type kwd_record     = Region.t
 type kwd_skip       = Region.t
@@ -325,6 +325,14 @@ and single_instr =
 | ProcCall of fun_call
 | Fail     of fail_instr reg
 | Skip     of kwd_skip
+| Patch    of record_patch reg
+
+and record_patch = {
+  kwd_patch    : kwd_patch;
+  record_name  : variable;
+  kwd_with     : kwd_with;
+  delta        : record_injection reg
+}
 
 and fail_instr = {
   kwd_fail  : kwd_fail;
@@ -474,7 +482,6 @@ and constr_expr =
 and record_expr =
   RecordInj  of record_injection reg
 | RecordProj of record_projection reg
-| RecordCopy of record_copy reg
 
 and record_injection = {
   opening    : kwd_record;
@@ -495,13 +502,6 @@ and record_projection = {
   field_path  : (field_name, dot) nsepseq
 }
 
-and record_copy = {
-  kwd_copy    : kwd_copy;
-  record_name : variable;
-  kwd_with    : kwd_with;
-  delta       : record_injection reg
-}
-
 and tuple = (expr, comma) nsepseq par reg
 
 and empty_list = typed_empty_list par
@@ -640,8 +640,7 @@ and constr_expr_to_region = function
 
 and record_expr_to_region = function
   RecordInj  {region; _}
-| RecordProj {region; _}
+| RecordProj {region; _} -> region
-| RecordCopy {region; _} -> region
 
 let instr_to_region = function
   Single Cond                {region; _}
@@ -653,6 +652,7 @@ let instr_to_region = function
 | Single ProcCall            {region; _}
 | Single Skip                region
 | Single Fail                {region; _}
+| Single Patch               {region; _}
 | Block                      {region; _} -> region
 
 let pattern_to_region = function
@@ -938,6 +938,7 @@ and print_single_instr = function
 | ProcCall fun_call   -> print_fun_call fun_call
 | Fail     {value; _} -> print_fail value
 | Skip     kwd_skip   -> print_token kwd_skip "skip"
+| Patch    {value; _} -> print_patch value
 
 and print_fail {kwd_fail; fail_expr} =
   print_token kwd_fail "fail";
@@ -1114,7 +1115,6 @@ and print_constr_expr = function
 and print_record_expr = function
   RecordInj  e -> print_record_injection e
 | RecordProj e -> print_record_projection e
-| RecordCopy e -> print_record_copy e
 
 and print_record_injection {value; _} =
   let {opening; fields; terminator; close} = value in
@@ -1138,9 +1138,9 @@ and print_record_projection {value; _} =
 and print_field_path sequence =
   print_nsepseq "." print_var sequence
 
-and print_record_copy {value; _} =
+and print_patch (node: record_patch) =
-  let {kwd_copy; record_name; kwd_with; delta} = value in
+  let {kwd_patch; record_name; kwd_with; delta} = node in
-  print_token kwd_copy "copy";
+  print_token kwd_patch "patch";
   print_var record_name;
   print_token kwd_with "with";
   print_record_injection delta

AST.mli

@@ -26,7 +26,6 @@ val sepseq_to_region  : ('a -> Region.t) -> ('a,'sep) sepseq -> Region.t
 type kwd_begin      = Region.t
 type kwd_case      = Region.t
 type kwd_const      = Region.t
-type kwd_copy       = Region.t
 type kwd_down       = Region.t
 type kwd_else       = Region.t
 type kwd_end        = Region.t
@@ -40,6 +39,7 @@ type kwd_is         = Region.t
 type kwd_mod        = Region.t
 type kwd_not        = Region.t
 type kwd_of         = Region.t
+type kwd_patch      = Region.t
 type kwd_procedure  = Region.t
 type kwd_record     = Region.t
 type kwd_skip       = Region.t
@@ -309,6 +309,14 @@ and single_instr =
 | ProcCall of fun_call
 | Fail     of fail_instr reg
 | Skip     of kwd_skip
+| Patch    of record_patch reg
+
+and record_patch = {
+  kwd_patch    : kwd_patch;
+  record_name  : variable;
+  kwd_with     : kwd_with;
+  delta        : record_injection reg
+}
 
 and fail_instr = {
   kwd_fail  : kwd_fail;
@@ -458,7 +466,6 @@ and constr_expr =
 and record_expr =
   RecordInj  of record_injection reg
 | RecordProj of record_projection reg
-| RecordCopy of record_copy reg
 
 and record_injection = {
   opening    : kwd_record;
@@ -479,13 +486,6 @@ and record_projection = {
   field_path  : (field_name, dot) nsepseq
 }
 
-and record_copy = {
-  kwd_copy    : kwd_copy;
-  record_name : variable;
-  kwd_with    : kwd_with;
-  delta       : record_injection reg
-}
-
 and tuple = (expr, comma) nsepseq par reg
 
 and empty_list = typed_empty_list par

LexToken.mli

@@ -70,7 +70,6 @@ type t =
 | Begin      of Region.t  (* "begin"      *)
 | Case       of Region.t  (* "case"       *)
 | Const      of Region.t  (* "const"      *)
-| Copy       of Region.t  (* "copy"       *)
 | Down       of Region.t  (* "down"       *)
 | Fail       of Region.t  (* "fail"       *)
 | If         of Region.t  (* "if"         *)
@@ -85,6 +84,7 @@ type t =
 | End        of Region.t  (* "end"        *)
 | Then       of Region.t  (* "then"       *)
 | Else       of Region.t  (* "else"       *)
+| Patch      of Region.t  (* "patch"      *)
 | Procedure  of Region.t  (* "procedure"  *)
 | Record     of Region.t  (* "record"     *)
 | Skip       of Region.t  (* "skip"       *)

LexToken.mll

@@ -69,7 +69,6 @@ type t =
 | Begin      of Region.t
 | Case       of Region.t
 | Const      of Region.t
-| Copy       of Region.t
 | Down       of Region.t
 | Fail       of Region.t
 | If         of Region.t
@@ -84,6 +83,7 @@ type t =
 | End        of Region.t
 | Then       of Region.t
 | Else       of Region.t
+| Patch      of Region.t
 | Procedure  of Region.t
 | Record     of Region.t
 | Skip       of Region.t
@@ -188,7 +188,6 @@ let proj_token = function
 | Begin      region -> region, "Begin"
 | Case       region -> region, "Case"
 | Const      region -> region, "Const"
-| Copy       region -> region, "Copy"
 | Down       region -> region, "Down"
 | Fail       region -> region, "Fail"
 | If         region -> region, "If"
@@ -203,6 +202,7 @@ let proj_token = function
 | End        region -> region, "End"
 | Then       region -> region, "Then"
 | Else       region -> region, "Else"
+| Patch      region -> region, "Patch"
 | Procedure  region -> region, "Procedure"
 | Record     region -> region, "Record"
 | Skip       region -> region, "Skip"
@@ -272,7 +272,6 @@ let to_lexeme = function
 | Begin      _ -> "begin"
 | Case       _ -> "case"
 | Const      _ -> "const"
-| Copy       _ -> "copy"
 | Down       _ -> "down"
 | Fail       _ -> "fail"
 | If         _ -> "if"
@@ -287,6 +286,7 @@ let to_lexeme = function
 | End        _ -> "end"
 | Then       _ -> "then"
 | Else       _ -> "else"
+| Patch      _ -> "patch"
 | Procedure  _ -> "procedure"
 | Record     _ -> "record"
 | Skip       _ -> "skip"
@@ -324,7 +324,6 @@ let keywords = [
   (fun reg -> Begin      reg);
   (fun reg -> Case       reg);
   (fun reg -> Const      reg);
-  (fun reg -> Copy       reg);
   (fun reg -> Down       reg);
   (fun reg -> Fail       reg);
   (fun reg -> If         reg);
@@ -339,6 +338,7 @@ let keywords = [
   (fun reg -> End        reg);
   (fun reg -> Then       reg);
   (fun reg -> Else       reg);
+  (fun reg -> Patch      reg);
   (fun reg -> Procedure  reg);
   (fun reg -> Record     reg);
   (fun reg -> Skip       reg);
@@ -548,7 +548,6 @@ let is_kwd = function
   Begin      _
 | Case       _
 | Const      _
-| Copy       _
 | Down       _
 | Fail       _
 | If         _
@@ -563,6 +562,7 @@ let is_kwd = function
 | End        _
 | Then       _
 | Else       _
+| Patch      _
 | Procedure  _
 | Record     _
 | Skip       _

ParToken.mly

@@ -47,7 +47,6 @@
 %token <Region.t> Begin       (* "begin"      *)
 %token <Region.t> Case        (* "case"       *)
 %token <Region.t> Const       (* "const"      *)
-%token <Region.t> Copy        (* "copy"       *)
 %token <Region.t> Down        (* "down"       *)
 %token <Region.t> Fail        (* "fail"       *)
 %token <Region.t> If          (* "if"         *)
@@ -62,6 +61,7 @@
 %token <Region.t> End         (* "end"        *)
 %token <Region.t> Then        (* "then"       *)
 %token <Region.t> Else        (* "else"       *)
+%token <Region.t> Patch       (* "patch"      *)
 %token <Region.t> Procedure   (* "procedure"  *)
 %token <Region.t> Record      (* "record"     *)
 %token <Region.t> Skip        (* "skip"       *)

Parser.mly

@@ -427,6 +427,19 @@ single_instr:
 | proc_call    { ProcCall $1 }
 | fail_instr   {     Fail $1 }
 | Skip         {     Skip $1 }
+| record_patch {    Patch $1 }
+
+record_patch:
+  Patch record_name With record_injection {
+    let region = cover $1 $4.region in
+    let value  = {
+      kwd_patch   = $1;
+      record_name = $2;
+      kwd_with    = $3;
+      delta       = $4}
+    in {region; value}
+  }
+
 
 fail_instr:
   Fail expr {
@@ -722,7 +735,6 @@ map_selection:
 record_expr:
   record_injection  { RecordInj  $1 }
 | record_projection { RecordProj $1 }
-| record_copy       { RecordCopy $1 }
 
 record_injection:
   Record
@@ -780,17 +792,6 @@ record_projection:
     in {region; value}
   }
 
-record_copy:
-  Copy record_name With record_injection {
-    let region = cover $1 $4.region in
-    let value  = {
-      kwd_copy    = $1;
-      record_name = $2;
-      kwd_with    = $3;
-      delta       = $4}
-    in {region; value}
-  }
-
 fun_call:
   fun_name arguments {
     let region = cover $1.region $2.region

Tests/crowdfunding.ligo

@@ -1,4 +1,4 @@
-type state is
+type store is
   record
     goal     : nat;
     deadline : timestamp;
@@ -6,10 +6,10 @@ type state is
     funded   : bool
   end
 
-entrypoint contribute (storage store : state;
+entrypoint contribute (storage store : store;
                        const sender  : address;
                        const amount  : mutez)
-  : state * list (operation) is
+  : store * list (operation) is
   var operations : list (operation) := []
   begin
     if now > store.deadline then
@@ -17,8 +17,7 @@ entrypoint contribute (storage store : state;
     else
       case store.backers[sender] of
         None ->
-          store :=
+          patch store with
-            copy store with
             record
               backers = add_binding ((sender, amount), store.backers)
             end
@@ -26,15 +25,15 @@ entrypoint contribute (storage store : state;
       end
   end with (store, operations)
 
-entrypoint withdraw (storage store : state; const sender : address)
+entrypoint withdraw (storage store : store; const sender : address)
-  : state * list (operation) is
+  : store * list (operation) is
   var operations : list (operation) := []
   begin
     if sender = owner then
       if now >= store.deadline then
         if balance >= store.goal then
           begin
-            store := copy store with record funded = True end;
+            patch store with record funded = True end;
             operations := [Transfer (owner, balance)]
           end
         else fail "Below target"
@@ -42,8 +41,8 @@ entrypoint withdraw (storage store : state; const sender : address)
     else skip
   end with (store, operations)
 
-entrypoint claim (storage store : state; const sender : address)
+entrypoint claim (storage store : store; const sender : address)
-  : state * list (operation) is
+  : store * list (operation) is
   var operations : list (operation) := []
   var amount : mutez := 0
   begin
@@ -59,8 +58,7 @@ entrypoint claim (storage store : state; const sender : address)
           else
             begin
               amount := store.backers[sender];
-              store :=
+              patch store with
-                copy store with
                 record
                   backers = remove_entry (sender, store.backers)
                 end;