Add warning for returning without initializing out parameter (#2807)

* Add warning for returning without initializing out parameter

* Add unused prelude function to squash uninitialized out variable warnings

1 files changed, 9 insertions, 0 deletions

diff --git a/source/slang/core.meta.slang b/source/slang/core.meta.slang
index 849e4c642..5265d6cb6 100644
--- a/source/slang/core.meta.slang
+++ b/source/slang/core.meta.slang
@@ -2649,6 +2649,15 @@ __generic<T, U>
 __intrinsic_op($(kIROp_Reinterpret))
 T reinterpret(U value);
 
+// Use an otherwise unused value
+//
+// This can be used to silence the warning about returning before initializing
+// an out paramter.
+__generic<T>
+[__readNone]
+[ForceInline]
+void unused(inout T){}
+
 // Specialized function
 
 /// Given a string returns an integer hash of that string.