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static assert as discussed here https://dev.vatsim-germany.org/issues/648#note-10

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#648
This commit is contained in:
Klaus Basan
2016-05-08 20:03:54 +02:00
committed by Roland Winklmeier
parent 4b11eb3f83
commit 49094115b1
4 changed files with 19 additions and 4 deletions
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6
src/blackgui/models/listmodeldbobjects.cpp
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@@ -9,6 +9,8 @@
#include "listmodeldbobjects.h"
#include "allmodelcontainers.h"
#include "blackmisc/datastoreobjectlist.h"
#include <type_traits>
using namespace BlackMisc;
using namespace BlackMisc::Aviation;
@@ -21,7 +23,9 @@ namespace BlackGui
CListModelDbObjects<ObjectType, ContainerType, KeyType, UseCompare>::CListModelDbObjects(const QString &translationContext, QObject *parent) :
CListModelBase<ObjectType, ContainerType, UseCompare>(translationContext, parent)
{
// void
constexpr bool hasIntegerKey = std::is_base_of<IDatastoreObjectWithIntegerKey, ObjectType>::value && std::is_same<int, KeyType>::value;
constexpr bool hasStringKey = std::is_base_of<IDatastoreObjectWithStringKey, ObjectType>::value && std::is_base_of<QString, KeyType>::value;
static_assert(hasIntegerKey || hasStringKey, "ObjectType needs to implement IDatastoreObjectWithXXXXKey and have appropriate KeyType");
}
template <typename ObjectType, typename ContainerType, typename KeyType, bool UseCompare>