[gegl] types: add a C++-friendly version of GEGL_RECTANGLE()

[N/A <ell src gnome org>]

commit 247138e0658205abb21c3bfe0bc5c4acbf7c8633
Author: Ell <ell_se yahoo com>
Date:   Wed Apr 4 08:29:51 2018 -0400

    types: add a C++-friendly version of GEGL_RECTANGLE()

 gegl/gegl-types.h |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)
---
diff --git a/gegl/gegl-types.h b/gegl/gegl-types.h
index 81a0d8a..c1d1b11 100644
--- a/gegl/gegl-types.h
+++ b/gegl/gegl-types.h
@@ -79,8 +79,28 @@ struct _GeglRectangle
 GType gegl_rectangle_get_type (void) G_GNUC_CONST;
 #define GEGL_TYPE_RECTANGLE   (gegl_rectangle_get_type())
 
+#ifndef __cplusplus
+
 #define  GEGL_RECTANGLE(x,y,w,h) (&((GeglRectangle){(x), (y),   (w), (h)}))
 
+#else
+
+static inline GeglRectangle
+_gegl_rectangle_helper (gint x,
+                        gint y,
+                        gint width,
+                        gint height)
+{
+  GeglRectangle result = {x, y, width, height};
+
+  return result;
+}
+
+#define  GEGL_RECTANGLE(x,y,w,h) \
+  ((GeglRectangle *) &(const GeglRectangle &) ::_gegl_rectangle_helper (x, y, w, h))
+
+#endif /* __cplusplus */
+
 typedef struct _GeglTileBackend GeglTileBackend;
 
 typedef struct _GeglOperationContext GeglOperationContext;