Refactoring for tuple expressions.

AST.ml

@@ -510,7 +510,7 @@ and expr =
 | ECall   of fun_call
 | EBytes  of (Lexer.lexeme * Hex.t) reg
 | EUnit   of c_Unit
-| ETuple  of tuple
+| ETuple  of tuple_expr
 | EPar    of expr par reg
 
 and set_expr =
@@ -634,7 +634,10 @@ and record_projection = {
   field_path  : (field_name, dot) nsepseq
 }
 
-and tuple = (expr, comma) nsepseq par reg
+and tuple_expr =
+  TupleInj of tuple_injection
+
+and tuple_injection = (expr, comma) nsepseq par reg
 
 and none_expr = typed_none_expr par
 
@@ -646,7 +649,7 @@ and typed_none_expr = {
 
 and fun_call = (fun_name * arguments) reg
 
-and arguments = tuple
+and arguments = tuple_injection
 
 (* Patterns *)
 
@@ -690,13 +693,16 @@ let rec expr_to_region = function
 | EConstr e -> constr_expr_to_region e
 | ERecord e -> record_expr_to_region e
 | EMap    e -> map_expr_to_region e
+| ETuple  e -> tuple_expr_to_region e
 | EVar   {region; _}
 | ECall  {region; _}
 | EBytes {region; _}
 | EUnit   region
-| ETuple {region; _}
 | EPar   {region; _} -> region
 
+and tuple_expr_to_region = function
+  TupleInj {region; _} -> region
+
 and map_expr_to_region = function
   MapLookUp {region; _}
 | MapInj    {region; _} -> region
@@ -1214,7 +1220,7 @@ and print_expr = function
 | ECall   e -> print_fun_call e
 | EBytes  b -> print_bytes b
 | EUnit   r -> print_token r "Unit"
-| ETuple  e -> print_tuple e
+| ETuple  e -> print_tuple_expr e
 | EPar    e -> print_par_expr e
 
 and print_map_expr = function
@@ -1394,7 +1400,10 @@ and print_binding {value; _} =
   print_token arrow "->";
   print_expr image
 
-and print_tuple {value; _} =
+and print_tuple_expr = function
+  TupleInj inj -> print_tuple_inj inj
+
+and print_tuple_inj {value; _} =
   let {lpar; inside; rpar} = value in
   print_token lpar "(";
   print_nsepseq "," print_expr inside;
@@ -1428,17 +1437,17 @@ and print_none_expr {value; _} =
 and print_fun_call {value; _} =
   let fun_name, arguments = value in
   print_var       fun_name;
-  print_tuple arguments
+  print_tuple_inj arguments
 
 and print_constr_app {value; _} =
   let constr, arguments = value in
   print_constr    constr;
-  print_tuple  arguments
+  print_tuple_inj arguments
 
 and print_some_app {value; _} =
   let c_Some, arguments = value in
   print_token c_Some "Some";
-  print_tuple arguments
+  print_tuple_inj arguments
 
 and print_par_expr {value; _} =
   let {lpar; inside; rpar} = value in

AST.mli

@@ -494,7 +494,7 @@ and expr =
 | ECall   of fun_call
 | EBytes  of (Lexer.lexeme * Hex.t) reg
 | EUnit   of c_Unit
-| ETuple  of tuple
+| ETuple  of tuple_expr
 | EPar    of expr par reg
 
 and set_expr =
@@ -618,7 +618,10 @@ and record_projection = {
   field_path  : (field_name, dot) nsepseq
 }
 
-and tuple = (expr, comma) nsepseq par reg
+and tuple_expr =
+  TupleInj  of tuple_injection
+
+and tuple_injection = (expr, comma) nsepseq par reg
 
 and none_expr = typed_none_expr par
 
@@ -630,7 +633,7 @@ and typed_none_expr = {
 
 and fun_call = (fun_name * arguments) reg
 
-and arguments = tuple
+and arguments = tuple_injection
 
 (* Patterns *)
 

Parser.mly

@@ -923,13 +923,13 @@ unary_expr:
 
 core_expr:
   Int              { EArith (Int $1) }
-| var              { EVar $1 }               (* TODO: Path *)
+| var              { EVar $1 }
 | String           { EString (String $1) }
 | Bytes            { EBytes $1 }
 | C_False          { ELogic (BoolExpr (False $1)) }
 | C_True           { ELogic (BoolExpr (True $1)) }
 | C_Unit           { EUnit $1 }
-| tuple            { ETuple $1 }
+| tuple_expr       { ETuple $1 }
 | list_expr        { EList (List $1) }
 | nil              { EList (Nil $1) }
 | none_expr        { EConstr (NoneExpr $1) }
@@ -955,9 +955,7 @@ path:
 map_lookup:
   path brackets(expr) {
     let region = cover (path_to_region $1) $2.region in
-    let value  = {
+    let value  = {path=$1; index=$2}
-      path  = $1;
-      index = $2}
     in {region; value}
   }
 
@@ -1004,11 +1002,16 @@ fun_call:
     in {region; value = $1,$2}
   }
 
-tuple:
+tuple_expr:
+  tuple_inj {
+    TupleInj $1
+  }
+
+tuple_inj:
   par(nsepseq(expr,COMMA)) { $1 }
 
 arguments:
-  tuple { $1 }
+  tuple_inj { $1 }
 
 list_expr:
   List series(expr,End) {