giboxedinfo: Add a tag type for boxed types

Boxed types are already represented within `GIInfoType`, so they should
have a `GType` representation as well.

In an upcoming commit, this will allow us to represent the subtype
relation between `GIBoxedInfo` and `GIRegisteredTypeInfo` too.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>
Helps: #3216

girepository/gibaseinfo.c

@@ -257,6 +257,7 @@ GI_DEFINE_BASE_INFO_TYPE (gi_enum_info, GI_INFO_TYPE_ENUM)
 GI_DEFINE_BASE_INFO_TYPE (gi_flags_info, GI_INFO_TYPE_FLAGS)
 GI_DEFINE_BASE_INFO_TYPE (gi_object_info, GI_INFO_TYPE_OBJECT)
 GI_DEFINE_BASE_INFO_TYPE (gi_interface_info, GI_INFO_TYPE_INTERFACE)
+GI_DEFINE_BASE_INFO_TYPE (gi_boxed_info, GI_INFO_TYPE_BOXED)
 GI_DEFINE_BASE_INFO_TYPE (gi_constant_info, GI_INFO_TYPE_CONSTANT)
 GI_DEFINE_BASE_INFO_TYPE (gi_value_info, GI_INFO_TYPE_VALUE)
 GI_DEFINE_BASE_INFO_TYPE (gi_signal_info, GI_INFO_TYPE_SIGNAL)
@@ -295,6 +296,7 @@ gi_base_info_init_types (void)
           { GI_INFO_TYPE_FLAGS, "GIFlagsInfo", sizeof (GIFlagsInfo), gi_flags_info_class_init, GI_INFO_TYPE_ENUM, G_TYPE_FLAG_NONE },
           { GI_INFO_TYPE_OBJECT, "GIObjectInfo", sizeof (GIObjectInfo), gi_object_info_class_init, 0, G_TYPE_FLAG_NONE },
           { GI_INFO_TYPE_INTERFACE, "GIInterfaceInfo", sizeof (GIInterfaceInfo), gi_interface_info_class_init, 0, G_TYPE_FLAG_NONE },
+          { GI_INFO_TYPE_BOXED, "GIBoxedInfo", sizeof (GIBoxedInfo), gi_boxed_info_class_init, 0, G_TYPE_FLAG_NONE },
           { GI_INFO_TYPE_CONSTANT, "GIConstantInfo", sizeof (GIConstantInfo), gi_constant_info_class_init, 0, G_TYPE_FLAG_NONE },
           { GI_INFO_TYPE_VALUE, "GIValueInfo", sizeof (GIValueInfo), gi_value_info_class_init, 0, G_TYPE_FLAG_NONE },
           { GI_INFO_TYPE_SIGNAL, "GISignalInfo", sizeof (GISignalInfo), gi_signal_info_class_init, GI_INFO_TYPE_CALLABLE, G_TYPE_FLAG_NONE },

girepository/giboxedinfo.c

@@ -0,0 +1,52 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ * GObject introspection: Boxed type implementation
+ *
+ * Copyright 2024 GNOME Foundation, Inc.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ * 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 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#include "config.h"
+
+#include <glib.h>
+
+#include <girepository/girepository.h>
+#include "gibaseinfo-private.h"
+#include "girepository-private.h"
+#include "gitypelib-internal.h"
+#include "giboxedinfo.h"
+
+/**
+ * GIBoxedInfo:
+ *
+ * A `GIBoxedInfo` represents a boxed type.
+ *
+ * There isn’t much you can do with a boxed type; `GIBoxedInfo` exists mainly to
+ * tag the type.
+ *
+ * Since: 2.80
+ */
+
+void
+gi_boxed_info_class_init (gpointer g_class,
+                          gpointer class_data)
+{
+  GIBaseInfoClass *info_class = g_class;
+
+  info_class->info_type = GI_INFO_TYPE_BOXED;
+}

girepository/giboxedinfo.h

@@ -0,0 +1,46 @@
+/* -*- mode: C; c-file-style: "gnu"; indent-tabs-mode: nil; -*-
+ * GObject introspection: Boxed types
+ *
+ * Copyright 2024 GNOME Foundation, Inc.
+ *
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ *
+ * 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 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, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#pragma once
+
+#if !defined (__GIREPOSITORY_H_INSIDE__) && !defined (GI_COMPILATION)
+#error "Only <girepository.h> can be included directly."
+#endif
+
+#include <girepository/gitypes.h>
+
+G_BEGIN_DECLS
+
+#define GI_TYPE_BOXED_INFO (gi_boxed_info_get_type ())
+
+/**
+ * GI_IS_BOXED_INFO:
+ * @info: an info structure
+ *
+ * Checks if @info is a [class@GIRepository.BoxedInfo] (or a derived type).
+ *
+ * Since: 2.80
+ */
+#define GI_IS_BOXED_INFO(info) (G_TYPE_CHECK_INSTANCE_TYPE ((info), GI_TYPE_BOXED_INFO))
+
+G_END_DECLS

girepository/girepository-private.h

@@ -132,12 +132,20 @@ void gi_object_info_class_init (gpointer g_class,
 
 struct _GIInterfaceInfo
 {
-  GIBaseInfo parent;
+  GIRegisteredTypeInfo parent;
 };
 
 void gi_interface_info_class_init (gpointer g_class,
                                    gpointer class_data);
 
+struct _GIBoxedInfo
+{
+  GIBaseInfo parent;
+};
+
+void gi_boxed_info_class_init (gpointer g_class,
+                               gpointer class_data);
+
 struct _GIConstantInfo
 {
   GIBaseInfo parent;

girepository/girepository.h

@@ -33,6 +33,7 @@
 
 #include <girepository/giarginfo.h>
 #include <girepository/gibaseinfo.h>
+#include <girepository/giboxedinfo.h>
 #include <girepository/gicallableinfo.h>
 #include <girepository/gicallbackinfo.h>
 #include <girepository/giconstantinfo.h>

girepository/gitypes.h

@@ -81,6 +81,10 @@ GI_AVAILABLE_IN_ALL GType gi_object_info_get_type (void);
 typedef struct _GIInterfaceInfo GIInterfaceInfo;
 GI_AVAILABLE_IN_ALL GType gi_interface_info_get_type (void);
 
+/* Documented in giboxedinfo.c */
+typedef struct _GIBoxedInfo GIBoxedInfo;
+GI_AVAILABLE_IN_ALL GType gi_boxed_info_get_type (void);
+
 /* Documented in giconstantinfo.c */
 typedef struct _GIConstantInfo GIConstantInfo;
 GI_AVAILABLE_IN_ALL GType gi_constant_info_get_type (void);

girepository/meson.build

@@ -44,6 +44,7 @@ gi_visibility_h = custom_target(
 girepo_headers = files(
   'giarginfo.h',
   'gibaseinfo.h',
+  'giboxedinfo.h',
   'gicallableinfo.h',
   'gicallbackinfo.h',
   'giconstantinfo.h',
@@ -145,6 +146,7 @@ girepo_sources = files(
   'gdump.c',
   'giarginfo.c',
   'gibaseinfo.c',
+  'giboxedinfo.c',
   'gicallableinfo.c',
   'gicallbackinfo.c',
   'giconstantinfo.c',