Deprecate properties. Use hinted cbuffers instead. This opens up to use a structured buffer in that way as well if you want instead.

test/codegen/hinted_cbuffer.golden

@@ -0,0 +1,13 @@
+cbuffer props : register(b0)
+{
+    float4x4 projection;
+    float4x4 view;
+}
+
+float4 vs_main(float4 pos : POSITION) : SV_POSITION
+{
+    float4 mv = mul(props.view, pos);
+    float4 mvp = mul(props.projection, mv);
+    return mvp;
+}
+