added template deduction guide to annotated_arg/ptr spec

Author: Chen, Brox

sycl/doc/extensions/proposed/sycl_ext_oneapi_annotated_arg.asciidoc

@@ -225,6 +225,15 @@ class annotated_arg {
     template<typename propertyT>
     static constexpr /*unspecified*/ get_property();
 };
+
+//Deduction guides
+template <typename T, typename... Args>
+annotated_arg(T, Args... args) -> annotated_arg<T, detail::properties_t<Args...>>;
+
+template <typename T, typename oldProp, typename otherProp>
+annotated_arg(annotated_arg<T, oldProp>, otherProp other) 
+    -> annotated_arg<T, detail::merged_properties_t<oldProp, otherProp>>;
+
 } // namespace sycl::ext::oneapi::experimental
 ----
 

sycl/doc/extensions/proposed/sycl_ext_oneapi_annotated_ptr.asciidoc

@@ -304,6 +304,15 @@ class annotated_ptr {
     template<typename propertyT>
     static constexpr /*unspecified*/ get_property();
   };
+
+//Deduction guides
+template <typename T, typename... Args>
+annotated_ptr(T, Args... args) -> annotated_ptr<T, detail::properties_t<Args...>>;
+
+template <typename T, typename oldProp, typename otherProp>
+annotated_ptr(annotated_arg<T, oldProp>, otherProp other)
+   -> annotated_ptr<T, detail::merged_properties_t<oldProp, otherProp>>;
+
 } // namespace sycl::ext::oneapi::experimental
 ----