Fix emitting Windows.Foundation.Metadata.DeprecatedAttribute. (#152)

Fixes #137

cswinrt/code_writers.h

@@ -3608,7 +3608,7 @@ AbiToProjectionVftablePtr = (IntPtr)nativeVftbl;
  {
  if (auto uint32_value = std::get_if<uint32_t>(&arg_value.value))
  {
- w.write(*uint32_value);
+ w.write("%u", *uint32_value);
  }
  else if (auto int32_value = std::get_if<int32_t>(&arg_value.value))
  {
@@ -3664,8 +3664,6 @@ AbiToProjectionVftablePtr = (IntPtr)nativeVftbl;
  attribute_name = attribute_name.substr(0, attribute_name.length() - "Attribute"sv.length());
  // Guid and Flags are handled explicitly
  if (attribute_name == "Guid" || attribute_name == "Flags") continue;
- // Deprecated is causing csc.exe to crash
- if (attribute_name == "Deprecated") continue;
  auto attribute_full = (attribute_name == "AttributeUsage") ? "AttributeUsage" :
  w.write_temp("%.%", attribute_namespace, attribute_name);
  std::vector<std::string> params;
@@ -4329,18 +4327,20 @@ public static Guid PIID = GuidGenerator.CreateIID(typeof(%));)",
  w.write("[FlagsAttribute]\n");
  }
 
+ auto enum_underlying_type = is_flags_enum(type) ? "uint" : "int";
+
  w.write(R"([global::WinRT.WindowsRuntimeType]
 %public enum % : %
 {
 )", 
  bind<write_custom_attributes>(type),
- bind<write_type_name>(type, false, false), is_flags_enum(type) ? "uint" : "uint");
+ bind<write_type_name>(type, false, false), enum_underlying_type);
  {
  for (auto&& field : type.FieldList())
  {
  if (auto constant = field.Constant())
  {
- w.write("% = %,\n", field.Name(), bind<write_constant>(constant));
+ w.write("% = unchecked((%)%),\n", field.Name(), enum_underlying_type, bind<write_constant>(constant));
  }
  }
  }