Refactored typer tests + test for constructor

src/ligo/ast_simplified.ml

@@ -717,6 +717,8 @@ end
 module Combinators = struct
   let annotated_expression ?type_annotation expression = {expression ; type_annotation}
 
+  let name (s : string) : name = s
+
   let unit  () : expression = Literal (Unit)
   let number n : expression = Literal (Number n)
   let bool   b : expression = Literal (Bool b)
@@ -724,9 +726,18 @@ module Combinators = struct
   let bytes  b : expression = Literal (Bytes (Bytes.of_string b))
 
   let tuple (lst : ae list) : expression = Tuple lst
+  let ez_tuple (lst : expression list) : expression =
+    tuple (List.map (fun e -> ae e) lst)
+
+  let constructor (s : string) (e : ae) : expression = Constructor (name s, e)
 
   let record (lst : (string * ae) list) : expression =
     let aux prev (k, v) = SMap.add k v prev in
     let map = List.fold_left aux SMap.empty lst in
     Record map
+
+  let ez_record  (lst : (string * expression) list) : expression =
+    (* TODO: define a correct implementation of List.map
+     * (an implementation that does not fail with stack overflow) *)
+    record (List.map (fun (s,e) -> (s, ae e)) lst)
 end

src/ligo/ast_typed.ml

@@ -341,6 +341,10 @@ module Combinators = struct
 
   let t_sum m s : type_value = type_value (Type_sum m) s
   let make_t_sum m = t_sum m None
+  let make_t_ez_sum (lst:(string * type_value) list) : type_value =
+    let aux prev (k, v) = SMap.add k v prev in
+    let map = List.fold_left aux SMap.empty lst in
+    type_value (Type_sum map) None
 
   let t_function (param, result) s : type_value = type_value (Type_function (param, result)) s
   let make_t_function f = t_function f None

src/ligo/test/typer_tests.ml

@@ -18,43 +18,41 @@ let int () : unit result =
   ok ()
 
 module TestExpressions = struct
-  let test_expression (expr : expression) (test_expected_ty : Typed.tv) =
+  let test_expression ?(env = Typer.Environment.empty)
+                      (expr : expression)
+                      (test_expected_ty : Typed.tv) =
     let open Typer in
     let open Typed in
     let pre = ae @@ expr in
-    let e = Environment.empty in
-    let%bind post = type_annotated_expression e pre in
+    let%bind post = type_annotated_expression env pre in
     let%bind () = assert_type_value_eq (post.type_annotation, test_expected_ty) in
     ok ()
 
-  open Simplified.Combinators
-  open Typed.Combinators
+  module I = Simplified.Combinators
+  module O = Typed.Combinators
+  module E = Typer.Environment.Combinators
 
-  let unit   () : unit result = test_expression (unit ())    (make_t_unit)
-  let int    () : unit result = test_expression (number 32)  (make_t_int)
-  let bool   () : unit result = test_expression (Simplified.Combinators.bool true)  (make_t_bool)
-  let string () : unit result = test_expression (string "s") (make_t_string)
-  let bytes  () : unit result = test_expression (bytes "b")  (make_t_bytes)
+  let unit   () : unit result = test_expression I.(unit ())    O.make_t_unit
+  let int    () : unit result = test_expression I.(number 32)  O.make_t_int
+  let bool   () : unit result = test_expression I.(bool true)  O.make_t_bool
+  let string () : unit result = test_expression I.(string "s") O.make_t_string
+  let bytes  () : unit result = test_expression I.(bytes "b")  O.make_t_bytes
 
   let tuple () : unit result =
-    test_expression Simplified.Combinators.(tuple [
-                         ae @@ number 32 ;
-                         ae @@ string "foo" ;
-                    ])
-                    (make_t_tuple [
-                         make_t_int ;
-                         make_t_string ;
-                    ])
+    test_expression
+      I.(ez_tuple [number 32; string "foo"])
+      O.(make_t_tuple [make_t_int; make_t_string])
+
+  let constructor () : unit result =
+    test_expression
+      ~env:(E.env_sum_type O.[("foo", make_t_int); ("bar", make_t_string)])
+      I.(constructor "foo" (ae @@ number 32))
+      O.(make_t_ez_sum [("foo", make_t_int); ("bar", make_t_string)])
 
   let record () : unit result =
-    test_expression Simplified.Combinators.(record [
-                         ("foo", ae @@ number 32) ;
-                         ("bar", ae @@ string "foo") ;
-                    ])
-                    (make_t_ez_record [
-                         ("foo", make_t_int) ;
-                         ("bar", make_t_string) ;
-                    ])
+    test_expression
+      I.(ez_record        [("foo", number 32);  ("bar", string "foo")])
+      O.(make_t_ez_record [("foo", make_t_int); ("bar", make_t_string)])
 
 end
 (* TODO: deep types (e.g. record of record)
@@ -67,5 +65,7 @@ let main = "Typer (from simplified AST)", [
     test "bool"        TestExpressions.bool ;
     test "string"      TestExpressions.string ;
     test "bytes"       TestExpressions.bytes ;
+    test "tuple"       TestExpressions.tuple ;
+    test "constructor" TestExpressions.constructor ;
     test "record"      TestExpressions.record ;
   ]

src/ligo/typer.ml

@@ -14,6 +14,7 @@ module Environment = struct
     type_environment: (string * ele) list ;
   }
   let empty : t = {
+    (*  TODO: use maps *)
     environment = [] ;
     type_environment = [] ;
   }
@@ -50,6 +51,13 @@ module Environment = struct
     let full ppf e =
       fprintf ppf "%a\n%a" value e type_ e
   end
+
+  module Combinators = struct
+    let env_sum_type ?(env = empty)
+                     ?(name = "a_sum_type")
+                     (lst : (string * ele) list) =
+      add env name (make_t_ez_sum lst)
+  end
 end
 
 type environment = Environment.t