Import Upstream version 2.72.4

glib/glib-typeof.h

@@ -0,0 +1,43 @@
+/* GLIB - Library of useful routines for C programming
+ * Copyright (C) 2021  Iain Lane, Xavier Claessens
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GLIB_TYPEOF_H__
+#define __GLIB_TYPEOF_H__
+
+#if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION)
+#error "Only <glib.h> can be included directly."
+#endif
+
+#include <glib/gversionmacros.h>
+
+/*
+ * We can only use __typeof__ on GCC >= 4.8, and not when compiling C++. Since
+ * __typeof__ is used in a few places in GLib, provide a pre-processor symbol
+ * to factor the check out from callers.
+ *
+ * This symbol is private.
+ */
+#undef glib_typeof
+#if !defined(__cplusplus) && (G_GNUC_CHECK_VERSION(4, 8) || defined(__clang__))
+#define glib_typeof(t) __typeof__ (t)
+#elif defined(__cplusplus) && __cplusplus >= 201103L && GLIB_VERSION_MIN_REQUIRED >= GLIB_VERSION_2_68
+/* C++11 decltype() is close enough for our usage */
+#include <type_traits>
+#define glib_typeof(t) typename std::remove_reference<decltype (t)>::type
+#endif
+
+#endif /* __GLIB_TYPEOF_H__ */