Add [Differentiable(n)] syntax to specify max order. (#2883)

1 files changed, 7 insertions, 0 deletions

diff --git a/source/slang/slang-check-modifier.cpp b/source/slang/slang-check-modifier.cpp
index b1f36ca2b..2bc914a65 100644
--- a/source/slang/slang-check-modifier.cpp
+++ b/source/slang/slang-check-modifier.cpp
@@ -573,6 +573,13 @@ namespace Slang
                 getSink()->diagnose(attr, Diagnostics::notEnoughArguments, attr->args.getCount(), params.getCount());
             }
         }
+        else if (auto diffAttr = as<BackwardDifferentiableAttribute>(attr))
+        {
+            SLANG_ASSERT(attr->args.getCount() == 1);
+            auto cint = checkConstantIntVal(attr->args[0]);
+            if (cint)
+                diffAttr->maxOrder = (int32_t)cint->value;
+        }
         else if (auto formatAttr = as<FormatAttribute>(attr))
         {
             SLANG_ASSERT(attr->args.getCount() == 1);