fix: issue #2, for real this time

expression.c

@@ -635,6 +635,7 @@ void ExpressionPrefixOperator(struct ParseState *Parser,
 {
     struct Value *Result;
     union AnyValue *ValPtr;
+    struct ValueType *Typ;
 
 #ifdef DEBUG_EXPRESSIONS
     printf("ExpressionPrefixOperator()\n");
@@ -663,11 +664,12 @@ void ExpressionPrefixOperator(struct ParseState *Parser,
     case TokenSizeof:
         /* return the size of the argument */
         if (TopValue->Typ == &Parser->pc->TypeType)
-            ExpressionPushInt(Parser, StackTop, TypeSize(TopValue->Val->Typ,
-                    TopValue->Val->Typ->ArraySize, true));
+            Typ = TopValue->Val->Typ;
         else
-            ExpressionPushInt(Parser, StackTop, TypeSize(TopValue->Typ,
-                    TopValue->Typ->ArraySize, true));
+            Typ = TopValue->Typ;
+        if (Typ->FromType != NULL && Typ->FromType->Base == TypeStruct)
+            Typ = Typ->FromType;
+        ExpressionPushInt(Parser, StackTop, TypeSize(Typ, Typ->ArraySize, true));
         break;
     default:
         /* an arithmetic operator */

tests/27_sizeof.c

@@ -1,12 +1,43 @@
 #include <stdio.h>
+#include <stdlib.h>
 
 char a;
 int b;
 double c;
 
-printf("%d\n", sizeof(a));
-printf("%d\n", sizeof(b));
-printf("%d\n", sizeof(c));
+struct P1 {
+    int a;
+    int b;
+    double c;
+};
 
+struct P2 {
+    int a;
+    int b;
+    int c;
+    int d;
+    double e;
+};
 
-void main() {}
+struct P3 {
+    int a;
+    int b;
+    int c;
+    int d;
+    double e;
+    struct P1 *p1;
+    struct P1 *p2;
+    struct P1 *p3;
+};
+
+void main() {
+    struct P1 *p1;
+    struct P2 *p2;
+    struct P3 *p3;
+    printf("%d\n", sizeof(*p1));
+    printf("%d\n", sizeof(*p2));
+    printf("%d\n", sizeof(*p3));
+    printf("%d\n", sizeof(a));
+    printf("%d\n", sizeof(b));
+    printf("%d\n", sizeof(c));
+}

tests/27_sizeof.expect

@@ -1,3 +1,7 @@
+16
+24
+48
 1
 4
 8
+