Fixed mismatch between declarations and definitions

lib/include/DOtherSide/DOtherSide.h

@@ -140,7 +140,7 @@ DOS_API int   dos_qmodelindex_row(void *vptr);
 DOS_API int   dos_qmodelindex_column(void *vptr);
 DOS_API bool  dos_qmodelindex_isValid(void *vptr);
 DOS_API void *dos_qmodelindex_data(void *vptr, int role);
-DOS_API void *dos_qmodelindex_parent(void *vptr, void *parent);
+DOS_API void *dos_qmodelindex_parent(void *vptr);
 DOS_API void *dos_qmodelindex_child(void *vptr, int row, int column);
 DOS_API void *dos_qmodelindex_sibling(void *vptr, int row, int column);
 DOS_API void  dos_qmodelindex_assign(void *l, void *r);

lib/include/DOtherSide/Utils.h

@@ -9,6 +9,29 @@
 
 namespace DOS {
 
+template<class Lambda>
+struct DeferHelper
+{
+    DeferHelper(Lambda lambda)
+        : m_lambda(std::move(lambda))
+    {}
+
+    ~DeferHelper()
+    {
+        try { m_lambda(); }
+        catch (...) {}
+    }
+
+    Lambda m_lambda;
+};
+
+template<typename Lambda>
+DeferHelper<Lambda> defer(Lambda l) {
+    return DeferHelper<Lambda>(std::move(l));
+}
+
+
+
 template <typename T>
 struct wrapped_array {
     wrapped_array(T *first, T *last) : begin_ {first}, end_ {last} {}

lib/src/DOtherSide.cpp

@@ -399,17 +399,15 @@ void dos_qobject_setObjectName(void *vptr, const char *name)
     object->setObjectName(QString::fromUtf8(name));
 }
 
-void *dos_qmodelindex_create(void **vptr)
+void *dos_qmodelindex_create()
 {
     return new QModelIndex();
 }
 
 void *dos_qmodelindex_create_qmodelindex(void *other_vptr)
 {
-    auto result = new QModelIndex();
     auto other = static_cast<QModelIndex *>(other_vptr);
-    *result = *other;
-    return result;
+    return new QModelIndex(*other);
 }
 
 void dos_qmodelindex_delete(void *vptr)
@@ -457,7 +455,7 @@ void *dos_qmodelindex_child(void *vptr, int row, int column)
     return static_cast<QModelIndex *>(result);
 }
 
-void *dos_qmodelindex_sibling(void *vptr, int row, int column, void *sibling)
+void *dos_qmodelindex_sibling(void *vptr, int row, int column)
 {
     auto index = static_cast<QModelIndex *>(vptr);
     auto result = new QModelIndex(index->sibling(row, column));