PropertySerialiser: add an explicit cast.

src/UESaveFile/PropertySerialiser.cpp

@@ -134,7 +134,7 @@ auto PropertySerialiser::readSet(BinaryReader& reader, const std::string& item_t
     }
     else {
         for(UnsignedInt i = 0; i < count; i++) {
-            auto item = readItem(reader, item_type, -1, "");
+            auto item = readItem(reader, item_type, UnsignedLong(-1), "");
             arrayAppend(array, std::move(item));
         }
     }

src/UESaveFile/Types/GenericStructProperty.h

@@ -26,7 +26,8 @@ struct GenericStructProperty : public StructProperty {
     using ptr = Containers::Pointer<GenericStructProperty>;
 
     template<typename T>
-    auto at(const std::string& name) -> T* {
+    std::enable_if_t<std::is_base_of<UnrealPropertyBase, T>::value, T*>
+    at(const std::string& name) {
         for(auto& item : properties) {
             if(item->name == name) {
                 return static_cast<T*>(item.get());

src/UESaveFile/UESaveFile.cpp

@@ -43,15 +43,6 @@ auto UESaveFile::reloadData() -> bool {
     return valid();
 }
 
-auto UESaveFile::at(const std::string& name) -> UnrealPropertyBase* {
-    for(auto& prop : _properties) {
-        if(*(prop->name) == name) {
-            return prop.get();
-        }
-    }
-    return nullptr;
-}
-
 auto UESaveFile::props() -> Containers::ArrayView<UnrealPropertyBase::ptr> {
     return _properties;
 }
@@ -63,7 +54,7 @@ auto UESaveFile::saveToFile() -> bool {
         return false;
     }
 
-    if(!writer.writeStaticArray(staticArrayView(_magicBytes)) ||
+    if(!writer.writeArray(arrayView(_magicBytes))       ||
        !writer.writeUnsignedInt(_saveVersion)           ||
        !writer.writeUnsignedInt(_packageVersion)        ||
        !writer.writeUnsignedShort(_engineVersion.major) ||

src/UESaveFile/UESaveFile.h

@@ -40,7 +40,16 @@ class UESaveFile {
 
         auto reloadData() -> bool;
 
-        auto at(const std::string& name) -> UnrealPropertyBase*;
+        template<typename T>
+        std::enable_if_t<std::is_base_of<UnrealPropertyBase, T>::value, T*>
+        at(const std::string& name) {
+            for(auto& prop : _properties) {
+                if(prop->name == name) {
+                    return static_cast<T*>(prop.get());
+                }
+            }
+            return nullptr;
+        }
 
         auto props() -> Containers::ArrayView<UnrealPropertyBase::ptr>;
 
@@ -54,7 +63,7 @@ class UESaveFile {
 
         std::string _filepath;
 
-        const Containers::StaticArray<4, char> _magicBytes{'G', 'V', 'A', 'S'};
+        Containers::StaticArray<4, char> _magicBytes{'G', 'V', 'A', 'S'};
 
         UnsignedInt _saveVersion = 0;
         UnsignedInt _packageVersion = 0;