compat/qhash: try fix older Qt

1 files changed, 20 insertions, 0 deletions

diff --git a/compat/qhash.hpp b/compat/qhash.hpp
new file mode 100644
index 00000000..507b612e
--- /dev/null
+++ b/compat/qhash.hpp
@@ -0,0 +1,20 @@
+#pragma once
+
+#include <QtGlobal>
+#include <QString>
+#include <QHashFunctions>
+
+// Qt < 5.14.0
+#ifndef QT_SPECIALIZE_STD_HASH_TO_CALL_QHASH_BY_CREF
+
+namespace std {
+template<> struct hash<QString>
+{
+    unsigned operator()(const QString& value) const
+    {
+        return qHash(value);
+    }
+};
+}
+
+#endif