multiple parameters allegedly work

src/ligo/ligo.ml

@@ -85,10 +85,18 @@ let transpile (p:AST_Typed.program) : Mini_c.program result = Transpiler.transla
 let transpile_entry (p:AST_Typed.program) (name:string) : Mini_c.anon_function result = Transpiler.translate_entry p name
 let transpile_expression ?(env:Mini_c.Environment.t = Mini_c.Environment.empty)
     (e:AST_Typed.annotated_expression) : Mini_c.expression result = Transpiler.translate_annotated_expression env e
-let transpile_value ?(env:Mini_c.Environment.t = Mini_c.Environment.empty)
+let transpile_value
     (e:AST_Typed.annotated_expression) : Mini_c.value result =
-  let%bind e = Transpiler.translate_annotated_expression env e in
-  Mini_c.expression_to_value e
+  let%bind f =
+    let open Transpiler in
+    let (f, t) = functionalize e in
+    let%bind main = translate_main f t in
+    ok main
+  in
+
+  let input = Mini_c.Combinators.d_unit in
+  let%bind r = Mini_c.Run.run_entry f input in
+  ok r
 
 let untranspile_value (v : Mini_c.value) (e:AST_Typed.type_value) : AST_Typed.annotated_expression result =
   Transpiler.untranspile v e
@@ -110,11 +118,12 @@ let type_file ?(debug_simplify = false) ?(debug_typed = false)
     )) ;
   ok typed
 
+
 let easy_run_typed
     ?(debug_mini_c = false) (entry:string)
     (program:AST_Typed.program) (input:AST_Typed.annotated_expression) : AST_Typed.annotated_expression result =
   let%bind mini_c_main =
-    trace (simple_error "transpile mini_c main") @@
+    trace (simple_error "transpile mini_c entry") @@
     transpile_entry program entry in
   (if debug_mini_c then
      Format.(printf "Mini_c : %a\n%!" Mini_c.PP.function_ mini_c_main.content)

src/ligo/mini_c.ml

@@ -187,13 +187,6 @@ module PP = struct
     fprintf ppf "Program:\n---\n%a" (pp_print_list ~pp_sep:pp_print_newline tl_statement) p
 end
 
-let expression_to_value ((e', _, _) as e:expression) : value result =
-  match e' with
-  | Literal v -> ok v
-  | _ -> fail
-      @@ error "not a value"
-      @@ Format.asprintf "%a" PP.expression e
-
 module Free_variables = struct
   type free_variable = string
   type free_variables = free_variable list
@@ -1001,6 +994,14 @@ module Run = struct
     let%bind (result : value) = Translate_ir.translate_value ex_ty_value in
     ok result
 
+
+  let expression_to_value ((e', _, _) as e:expression) : value result =
+    match e' with
+    | Literal v -> ok v
+    | _ -> fail
+        @@ error "not a value"
+        @@ Format.asprintf "%a" PP.expression e
+
 end
 
 
@@ -1077,6 +1078,8 @@ module Combinators = struct
   let expr_int expr env : expression = (expr, t_int, env)
   let var_int name env : expression = expr_int (Var name) env
 
+  let d_unit : value = `Unit
+
   let environment_wrap pre_environment post_environment = { pre_environment ; post_environment }
   let id_environment_wrap e = environment_wrap e e
 

src/ligo/transpiler.ml

@@ -16,7 +16,8 @@ let rec translate_type (t:AST.type_value) : type_value result =
   | Type_constant ("bool", []) -> ok (`Base Bool)
   | Type_constant ("int", []) -> ok (`Base Int)
   | Type_constant ("string", []) -> ok (`Base String)
-  | Type_constant _ -> simple_fail "unrecognized constant"
+  | Type_constant ("unit", []) -> ok (`Base Unit)
+  | Type_constant (name, _) -> fail (error "unrecognized constant" name)
   | Type_sum m ->
       let node = Append_tree.of_list @@ list_of_map m in
       let aux a b : type_value result =
@@ -255,6 +256,18 @@ let translate_main (l:AST.lambda) (t:AST.type_value) : anon_function result =
   | Literal (`Function f) -> ok f
   | _ -> simple_fail "main is not a function"
 
+(* From a non-functional expression [expr], build the functional expression [fun () -> expr] *)
+let functionalize (e:AST.annotated_expression) : AST.lambda * AST.type_value =
+  let t = e.type_annotation in
+  let open! AST in
+  {
+    binder = "_" ;
+    input_type = Combinators.make_t_unit ;
+    output_type = t ;
+    result = e ;
+    body = [Skip]
+  }, Combinators.(make_t_function (make_t_unit, t))
+
 let translate_entry (lst:AST.program) (name:string) : anon_function result =
   let rec aux acc (lst:AST.program) =
     match lst with
@@ -265,7 +278,9 @@ let translate_entry (lst:AST.program) (name:string) : anon_function result =
         then (
           match an.annotated_expression.expression with
           | Lambda l -> Some (acc, l, an.annotated_expression.type_annotation)
-          | _ -> None
+          | _ ->
+              let (a, b) = functionalize an.annotated_expression in
+              Some (acc, a, b)
         ) else (
           aux ((AST.Assignment an) :: acc) tl
         )