[tests] test new feature

tests/basic/oracle/underlying_type.res.oracle

+[kernel] Parsing tests/basic/underlying_type.cpp (external front-end)
+Now output intermediate result
+/* Generated by Frama-C */
+struct _frama_c_vmt_content {
+   void (*method_ptr)() ;
+   int shift_this ;
+};
+struct _frama_c_rtti_name_info_node;
+struct _frama_c_vmt {
+   struct _frama_c_vmt_content *table ;
+   int table_size ;
+   struct _frama_c_rtti_name_info_node *rtti_info ;
+};
+struct _frama_c_rtti_name_info_content {
+   struct _frama_c_rtti_name_info_node *value ;
+   int shift_object ;
+   int shift_vmt ;
+};
+struct _frama_c_rtti_name_info_node {
+   char const *name ;
+   struct _frama_c_rtti_name_info_content *base_classes ;
+   int number_of_base_classes ;
+   struct _frama_c_vmt *pvmt ;
+};
+typedef _Bool value_type;
+struct integral_constant<bool,0>;
+struct integral_constant<bool,0> {
+   
+};
+typedef _Bool value_type;
+struct integral_constant<bool,1>;
+struct integral_constant<bool,1> {
+   
+};
+enum E {
+    A = 1,
+    B = 2
+};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+/*@ requires \valid_read(this); */
+value_type value_type)(struct integral_constant<bool,0> const *this);
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "integral_constant",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+/*@ requires \valid_read(this); */
+value_type value_type)(struct integral_constant<bool,1> const *this);
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "integral_constant",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "__boolean",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "__boolean",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "_is_void",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "is_enum",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "ok_type",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "ko_type",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "__underlying_type_t",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info;
+
+struct _frama_c_rtti_name_info_node _frama_c_rtti_name_info =
+  {.name = "underlying_type",
+   .base_classes = (struct _frama_c_rtti_name_info_content *)0,
+   .number_of_base_classes = 0,
+   .pvmt = (struct _frama_c_vmt *)0};
+int f(void)
+{
+  int __retres;
+  __retres = (int)((enum E)A);
+  return __retres;
+}
+
+

tests/basic/underlying_type.cpp

+#include <type_traits>
+
+enum class E : int { A = 1, B = 2 };
+
+int f() {
+  return static_cast<std::underlying_type<E>::type>(E::A);
+}