'do_not_remove',
         'vlib/v/tests/const_fixed_array_containing_references_to_itself_test.v', // error C2099: initializer is not a constant
         'vlib/v/tests/const_and_global_with_same_name_test.v', // error C2099: initializer is not a constant
-        'vlib/v/tests/sumtype_as_cast_test.v', // error: Compound statement expression cannot support
     ]
     skip_on_windows               = [
         'do_not_remove',

     mut expr_type_sym := g.table.sym(g.unwrap_generic(node.expr_type))
     if mut expr_type_sym.info is ast.SumType {
         dot := if node.expr_type.is_ptr() { '->' } else { '.' }
-        $if !msvc {
-            if node.expr is ast.CallExpr {
-                tmp_var := g.new_tmp_var()
-                expr_styp := g.typ(node.expr_type)
-                g.write('({ ${expr_styp} ${tmp_var} = ')
-                g.expr(node.expr)
-                g.write('; ')
-                if sym.info is ast.FnType {
-                    g.write('/* as */ (${styp})__as_cast(')
-                } else {
-                    g.write('/* as */ *(${styp}*)__as_cast(')
-                }
-                g.write(tmp_var)
-                g.write(dot)
-                g.write('_${sym.cname},')
-                g.write(tmp_var)
-                g.write(dot)
-                sidx := g.type_sidx(unwrapped_node_typ)
-                g.write('_typ, ${sidx}); }) /*expected idx: ${sidx}, name: ${sym.name} */ ')
-            } else {
-                if sym.info is ast.FnType {
-                    g.write('/* as */ (${styp})__as_cast(')
-                } else {
-                    g.write('/* as */ *(${styp}*)__as_cast(')
-                }
-                g.write('(')
-                g.expr(node.expr)
-                g.write(')')
-                g.write(dot)
-                g.write('_${sym.cname},')
-                g.write('(')
-                g.expr(node.expr)
-                g.write(')')
-                g.write(dot)
-                // g.write('typ, /*expected:*/$node.typ)')
-                sidx := g.type_sidx(unwrapped_node_typ)
-                g.write('_typ, ${sidx}) /*expected idx: ${sidx}, name: ${sym.name} */ ')
-            }
-        } $else {
-            if sym.info is ast.FnType {
-                g.write('/* as */ (${styp})__as_cast(')
-            } else {
-                g.write('/* as */ *(${styp}*)__as_cast(')
-            }
-            g.write('(')
-            g.expr(node.expr)
-            g.write(')')
-            g.write(dot)
-            g.write('_${sym.cname},')
-            g.write('(')
-            g.expr(node.expr)
-            g.write(')')
-            g.write(dot)
-            // g.write('typ, /*expected:*/$node.typ)')
-            sidx := g.type_sidx(unwrapped_node_typ)
-            g.write('_typ, ${sidx}) /*expected idx: ${sidx}, name: ${sym.name} */ ')
+        if sym.info is ast.FnType {
+            g.write('/* as */ (${styp})__as_cast(')
+        } else {
+            g.write('/* as */ *(${styp}*)__as_cast(')
         }
+        g.write('(')
+        g.expr(node.expr)
+        g.write(')')
+        g.write(dot)
+        g.write('_${sym.cname},')
+        g.write('(')
+        g.expr(node.expr)
+        g.write(')')
+        g.write(dot)
+        // g.write('typ, /*expected:*/$node.typ)')
+        sidx := g.type_sidx(unwrapped_node_typ)
+        g.write('_typ, ${sidx}) /*expected idx: ${sidx}, name: ${sym.name} */ ')
 
         // fill as cast name table
         for variant in expr_type_sym.info.variants {

deleted file mode 100644
-type Sum = int | string
-
-struct Count {
-mut:
-    count int
-}
-
-fn (mut c Count) ret_sum() Sum {
-    c.count++
-    return c.count
-}
-
-fn test_sumtype_as_cast() {
-    mut cnt := Count{22}
-    _ := cnt.ret_sum() as int
-    println(cnt)
-    assert cnt.count == 23
-}