eolian: add new __undefined_type builtin to silence warnings

src/bin/eolian/types_generator.c

@@ -217,6 +217,14 @@ types_header_generate(const char *eo_filename, Eina_Strbuf *buf, Eina_Bool full)
         if (!tp || eolian_type_is_extern(tp))
           continue;
 
+        if (eolian_type_type_get(tp) == EOLIAN_TYPE_ALIAS)
+          {
+             const Eolian_Type *btp = eolian_type_base_type_get(tp);
+             if (eolian_type_type_get(btp) == EOLIAN_TYPE_REGULAR)
+               if (!strcmp(eolian_type_full_name_get(btp), "__undefined_type"))
+                 continue;
+          }
+
         Eina_Strbuf *tbuf = _type_generate(tp, full);
         if (tbuf)
           {

src/lib/eolian/database_validate.c

@@ -51,6 +51,8 @@ _validate_type(const Eolian_Type *tp)
            int id = eo_lexer_keyword_str_to_id(tp->full_name);
            if (id)
              return eo_lexer_is_type_keyword(id);
+           if (!strcmp(tp->full_name, "__undefined_type"))
+             return EINA_TRUE;
            /* user defined */
            tpp = eolian_type_base_type_get(tp);
            if (!tpp)

src/tests/eolian/data/typedef.eo

@@ -3,6 +3,8 @@ type List_Objects: own(list<Eo *>*); /* A little more complex */
 
 type @extern Evas.Pants: float; /* not generated */
 
+type Undef: __undefined_type; /* not generated */
+
 enum Enum.Bar
 {
    legacy: bar;

src/tests/eolian/eolian_parsing.c

@@ -397,6 +397,8 @@ START_TEST(eolian_typedef)
    fail_if(strcmp(type_name, "List_Objects"));
    /* not generated extern, skip */
    fail_if(!eina_iterator_next(iter, (void**)&atype));
+   /* not generated undefined type, skip */
+   fail_if(!eina_iterator_next(iter, (void**)&atype));
    fail_if(eina_iterator_next(iter, (void**)&atype));
 
    eolian_shutdown();