api: Restore OIIO_NAMESPACE_USING

This got lost with the 2-level namespace changes in #4567, but is used by e.g. OpenUSD. Might as well not break the API here. Signed-off-by: Brecht Van Lommel <[email protected]>
AcademySoftwareFoundation · Jan 22, 2025 · 2f5fd3c · 2f5fd3c
1 parent 2677d4c
commit 2f5fd3c
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/include/OpenImageIO/oiioversion.h.in b/src/include/OpenImageIO/oiioversion.h.in
@@ -178,6 +178,9 @@ namespace OIIO = @PROJ_NAMESPACE@;
 #define OIIO_NAMESPACE_3_0_BEGIN namespace OIIO_NAMESPACE_3_0 {
 #define OIIO_NAMESPACE_3_0_END }
 
+// Macro to use names without explicit qualifier
+#define OIIO_NAMESPACE_USING using namespace @PROJ_NAMESPACE@::@PROJ_VERSION_NAMESPACE@;
+
 
 /// Each imageio DSO/DLL should include this statement:
 ///      DLLPUBLIC int FORMAT_imageio_version = OPENIMAGEIO_PLUGIN_VERSION;