File fcitx5-gcc7.patch of Package fcitx5

Index: fcitx5-5.1.11/src/frontend/ibusfrontend/ibusfrontend.cpp
===================================================================
--- fcitx5-5.1.11.orig/src/frontend/ibusfrontend/ibusfrontend.cpp
+++ fcitx5-5.1.11/src/frontend/ibusfrontend/ibusfrontend.cpp
@@ -598,23 +598,39 @@ private:
     FCITX_OBJECT_VTABLE_WRITABLE_PROPERTY(
         contentType, "ContentType", "(uu)",
         ([]() -> dbus::DBusStruct<uint32_t, uint32_t> { return {0, 0}; }),
+#if __GNC__ < 9
+        ([&](dbus::DBusStruct<uint32_t, uint32_t> type) {
+#else
         ([this](dbus::DBusStruct<uint32_t, uint32_t> type) {
+#endif
             setContentType(std::get<0>(type), std::get<1>(type));
         }),
         dbus::PropertyOption::Hidden);
     FCITX_OBJECT_VTABLE_WRITABLE_PROPERTY(
         clientCommitPreedit, "ClientCommitPreedit", "(b)",
+#if __GNC__ < 9
+        ([&]() -> dbus::DBusStruct<bool> { return {clientCommitPreedit_}; }),
+        ([&](dbus::DBusStruct<bool> value) {
+#else
         ([this]() -> dbus::DBusStruct<bool> { return {clientCommitPreedit_}; }),
         ([this](dbus::DBusStruct<bool> value) {
+#endif
             clientCommitPreedit_ = std::get<0>(value);
         }),
         dbus::PropertyOption::Hidden);
     FCITX_OBJECT_VTABLE_WRITABLE_PROPERTY(
         effectivePostProcessKeyEvent, "EffectivePostProcessKeyEvent", "(b)",
+#if __GNC__ < 9
+        ([&]() -> dbus::DBusStruct<bool> {
+            return {effectivePostProcessKeyEvent_};
+        }),
+        ([&](dbus::DBusStruct<bool> value) {
+#else
         ([this]() -> dbus::DBusStruct<bool> {
             return {effectivePostProcessKeyEvent_};
         }),
         ([this](dbus::DBusStruct<bool> value) {
+#endif
             effectivePostProcessKeyEvent_ = std::get<0>(value);
         }),
         dbus::PropertyOption::Hidden);
Index: fcitx5-5.1.11/test/testdbus.cpp
===================================================================
--- fcitx5-5.1.11.orig/test/testdbus.cpp
+++ fcitx5-5.1.11/test/testdbus.cpp
@@ -70,8 +70,13 @@ private:
     FCITX_OBJECT_VTABLE_PROPERTY(testProperty, "testProperty", "i",
                                  []() { return 5; });
     FCITX_OBJECT_VTABLE_WRITABLE_PROPERTY(
+#if __GNUC__ < 9
+        testProperty2, "testProperty2", "i", [&]() { return prop2; },
+        [&](int32_t v) { prop2 = v; });
+#else
         testProperty2, "testProperty2", "i", [this]() { return prop2; },
         [this](int32_t v) { prop2 = v; });
+#endif
 };
 
 #define TEST_SERVICE "org.fcitx.Fcitx.TestDBus"