From 7d8dd28668193880728b73a470d7889d30feb7a7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Du=C5=A1an=20Poizl?= <nou.spiro@gmail.com>
Date: Thu, 26 Jan 2023 14:04:04 +0100
Subject: [PATCH] Fix compilation on older Qt

---
 libxisf.cpp | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/libxisf.cpp b/libxisf.cpp
index b55a4ad..399b7c4 100644
--- a/libxisf.cpp
+++ b/libxisf.cpp
@@ -12,6 +12,14 @@
 
 #define STRING_ENUM(e) {#e, e}
 
+template<> struct std::hash<QString>
+{
+    size_t operator()(const QString &string) const
+    {
+        return std::hash<std::string>{}(string.toStdString());
+    }
+};
+
 namespace LibXISF
 {
 
@@ -677,9 +685,8 @@ void XISFWriter::writeMetadata()
     _xml->writeEndElement();
 }
 
-#define REGISTER_METATYPE(type) qRegisterMetaType<type>("LibXISF::"#type); \
-    typeToId.insert({#type, QMetaType::fromType<type>().id()}); \
-    idToType.insert({QMetaType::fromType<type>().id(), #type})
+#define REGISTER_METATYPE(type) { int id = qRegisterMetaType<type>("LibXISF::"#type); \
+    typeToId.insert({#type, id}); idToType.insert({id, #type}); }
 
 struct TypesInit
 {