Add metal downstream compiler + metallib target. (#3990)

* Add metal downstream compiler + metallib target.

* Add more comments.

* Add missing override.

1 files changed, 2 insertions, 0 deletions

diff --git a/slang.h b/slang.h
index 1b7737f18..b0007d1d3 100644
--- a/slang.h
+++ b/slang.h
@@ -610,6 +610,8 @@ extern "C"
         SLANG_HOST_HOST_CALLABLE,       ///< Host callable host code (ie non kernel/shader) 
         SLANG_CPP_PYTORCH_BINDING,      ///< C++ PyTorch binding code.
         SLANG_METAL,                    ///< Metal shading language
+        SLANG_METAL_LIB,                ///< Metal library
+        SLANG_METAL_LIB_ASM,            ///< Metal library assembly
         SLANG_TARGET_COUNT_OF,
     };