hierarchy: fix data structure size tests

Cargo.toml

@@ -8,7 +8,7 @@ members = ["wellen"]
 default-members = ["wellen"]
 
 [workspace.package]
-version = "0.11.0"
+version = "0.11.1"
 edition = "2021"
 # we require the `div_ceil` method on integers
 rust-version = "1.73.0"

wellen/src/hierarchy.rs

@@ -1219,8 +1219,7 @@ mod tests {
                 + std::mem::size_of::<Option<EnumTypeId>>() // enum type
                 + std::mem::size_of::<HierarchyStringId>()  // VHDL type name
                 + std::mem::size_of::<Option<ScopeRef>>()   // parent
-                + std::mem::size_of::<HierarchyItemId>()    // next
-                + 2 // padding
+                + std::mem::size_of::<HierarchyItemId>() // next
         );
         // currently this all comes out to 48 bytes (~= 6x 64-bit pointers)
         assert_eq!(std::mem::size_of::<Var>(), 48);
@@ -1236,10 +1235,10 @@ mod tests {
                 + std::mem::size_of::<HierarchyItemId>() // child
                 + std::mem::size_of::<ScopeRef>() // parent
                 + std::mem::size_of::<HierarchyItemId>() // next
-                + 1 // padding
+                + 3 // padding
         );
-        // currently this all comes out to 32 bytes (~= 4x 64-bit pointers)
-        assert_eq!(std::mem::size_of::<Scope>(), 32);
+        // currently this all comes out to 32 bytes (~= 4.5x 64-bit pointers)
+        assert_eq!(std::mem::size_of::<Scope>(), 36);
 
         // for comparison: one string is 24 bytes for the struct alone (ignoring heap allocation)
         assert_eq!(std::mem::size_of::<String>(), 24);