fix struct/interface/logic conversion interactions

- interface conversion only waits for type resolution of modports
- typeof conversion resolves struct field accesses
- logic conversion only converts logic data declarations
- struct conversion only converts within modules
- fix nested type traversal order causing premature struct conversion

src/Convert/Interface.hs

@@ -62,8 +62,14 @@ convert =
         fullyResolved :: ModuleItem -> Bool
         fullyResolved =
             not . any isTypeOf . execWriter .
-                collectNestedModuleItemsM (collectTypesM collectType)
+                collectNestedModuleItemsM collectModport
             where
+                collectModport :: ModuleItem -> Writer [Type] ()
+                collectModport (Modport _ modportDecls) =
+                    mapM collectModportDecl modportDecls >> return ()
+                collectModport _ = return ()
+                collectModportDecl :: ModportDecl -> Writer [Type] ()
+                collectModportDecl (_, _, t, _) = collectType t
                 collectType :: Type -> Writer [Type] ()
                 collectType t = tell [t]
                 isTypeOf TypeOf{} = True

src/Convert/Logic.hs

@@ -74,7 +74,16 @@ convertDescription ports orig =
             PackageItem _ -> True
             Package _ _ _ -> False
 
-        origIdents = execWriter (collectModuleItemsM regIdents orig)
+        logics = execWriter (collectModuleItemsM collectLogicM orig)
+        collectLogicM :: ModuleItem -> Writer Idents ()
+        collectLogicM (MIPackageItem (Decl (Variable _ t x _ _))) =
+            case t of
+                IntegerVector TLogic _ _ -> tell $ Set.singleton x
+                _ -> return ()
+        collectLogicM _ = return ()
+
+        origIdents = Set.intersection logics $
+            execWriter (collectModuleItemsM regIdents orig)
         fixed = traverseModuleItems fixModuleItem orig
         fixedIdents = execWriter (collectModuleItemsM regIdents fixed)
         conversion = traverseDecls convertDecl . convertModuleItem

src/Convert/Struct.hs

@@ -26,7 +26,7 @@ convert :: [AST] -> [AST]
 convert = map $ traverseDescriptions convertDescription
 
 convertDescription :: Description -> Description
-convertDescription (description @ Part{}) =
+convertDescription (description @ (Part _ _ Module _ _ _ _)) =
     traverseModuleItems (traverseTypes' ExcludeParamTypes $ convertType structs) $
     Part attrs extern kw lifetime name ports (items ++ funcs)
     where

src/Convert/Traverse.hs

@@ -837,7 +837,7 @@ collectDeclsM = collectDeclsM' IncludeTFs
 traverseNestedTypesM :: Monad m => MapperM m Type -> MapperM m Type
 traverseNestedTypesM mapper = fullMapper
     where
-        fullMapper t = tm t >>= mapper
+        fullMapper = mapper >=> tm
         tm (Alias      ps xx    rs) = return $ Alias      ps xx    rs
         tm (Net           kw sg rs) = return $ Net           kw sg rs
         tm (Implicit         sg rs) = return $ Implicit         sg rs

src/Convert/TypeOf.hs

@@ -15,6 +15,7 @@ import Control.Monad.State
 import Data.List (elemIndex)
 import Data.Maybe (fromMaybe, mapMaybe)
 import Data.Int (Int32)
+import Data.Tuple (swap)
 import qualified Data.Map.Strict as Map
 
 import Convert.Traverse
@@ -100,6 +101,14 @@ typeof (orig @ (Range e mode r)) = do
             NonIndexed   -> snd r
             IndexedPlus  -> BinOp Sub (uncurry (BinOp Add) r) (Number "1")
             IndexedMinus -> BinOp Add (uncurry (BinOp Sub) r) (Number "1")
+typeof (orig @ (Dot e x)) = do
+    t <- typeof e
+    return $ case t of
+        Struct _ fields [] ->
+            case lookup x $ map swap fields of
+                Just typ -> typ
+                Nothing -> TypeOf orig
+        _ -> TypeOf orig
 typeof (orig @ (Cast (Right (Ident x)) _)) = do
     typeMap <- get
     if Map.member x typeMap

test/basic/interface_struct.sv

@@ -0,0 +1,30 @@
+typedef struct packed {
+    logic c, d;
+} T;
+typedef struct packed {
+    logic a, b;
+    T y;
+} S;
+
+interface I;
+    S x;
+    type(x.y) w;
+    modport D(input x);
+endinterface
+
+module M(m);
+    I.D m;
+    initial begin
+        $display("%b", m.x.a);
+        $display("%b", m.x.b);
+        $display("%b", m.x.y.c);
+        $display("%b", m.x.y.d);
+    end
+endmodule
+
+module top;
+    I i();
+    M m(i);
+    assign i.x = 4'b1001;
+    initial i.w = 2'b10;
+endmodule

test/basic/interface_struct.v

@@ -0,0 +1,12 @@
+module top;
+    wire [3:0] i_x;
+    reg [1:0] i_w;
+    assign i_x = 4'b1001;
+    initial i_w = 2'b10;
+    initial begin
+        $display("%b", i_x[3]);
+        $display("%b", i_x[2]);
+        $display("%b", i_x[1]);
+        $display("%b", i_x[0]);
+    end
+endmodule