diff --git a/examples/c_print_args_alt/main.c b/examples/c_print_args_alt/main.c
index a8fe419..10b0167 100644
--- a/examples/c_print_args_alt/main.c
+++ b/examples/c_print_args_alt/main.c
@@ -9,14 +9,32 @@ int test_function1_with_args(int a, short b){
 }
 METAC_GSYM_LINK(test_function1_with_args);
 
-int my_printf(const char * format, ...) {
-    va_list l;
-    va_start(l, format);
-    int res = vprintf(format, l);
-    va_end(l);
-    return res;
+typedef struct list_s{
+    double x;
+    struct list_s * p_next;
+}list_t;
+
+double test_function3_with_args(list_t *p_list) {
+    double sum = 0.0;
+    while(p_list != NULL) {
+        sum += p_list->x;
+        p_list->x += 1;
+        
+        p_list = p_list->p_next;
+    }
+    printf("!!!result is %f %Lf!!!\n", sum, (long double)sum);
+    return sum;
 }
-METAC_GSYM_LINK(my_printf);
+METAC_GSYM_LINK(test_function3_with_args);
+
+// int my_printf(const char * format, ...) {
+//     va_list l;
+//     va_start(l, format);
+//     int res = vprintf(format, l);
+//     va_end(l);
+//     return res;
+// }
+// METAC_GSYM_LINK(my_printf);
 
 
 metac_tag_map_t * p_tagmap = NULL;
@@ -27,18 +45,18 @@ METAC_TAG_MAP_NEW(va_args_tag_map, NULL, {.mask =
             METAC_TAG_MAP_ENTRY_CATEGORY_MASK(METAC_TEC_final),},)
     /* start tags for all types */
 
-    METAC_TAG_MAP_ENTRY(METAC_GSYM_LINK_ENTRY(my_printf))
-        METAC_TAG_MAP_SET_TAG(0, METAC_TEO_entry, 0, METAC_TAG_MAP_ENTRY_PARAMETER({.n = "format"}),
-            METAC_ZERO_ENDED_STRING()
-        )
-        METAC_TAG_MAP_SET_TAG(0, METAC_TEO_entry, 0, METAC_TAG_MAP_ENTRY_PARAMETER({.i = 1}), 
-            METAC_FORMAT_BASED_VA_ARG()
-        )
-    METAC_TAG_MAP_ENTRY_END
+    // METAC_TAG_MAP_ENTRY(METAC_GSYM_LINK_ENTRY(my_printf))
+    //     METAC_TAG_MAP_SET_TAG(0, METAC_TEO_entry, 0, METAC_TAG_MAP_ENTRY_PARAMETER({.n = "format"}),
+    //         METAC_ZERO_ENDED_STRING()
+    //     )
+    //     METAC_TAG_MAP_SET_TAG(0, METAC_TEO_entry, 0, METAC_TAG_MAP_ENTRY_PARAMETER({.i = 1}), 
+    //         METAC_FORMAT_BASED_VA_ARG()
+    //     )
+    // METAC_TAG_MAP_ENTRY_END
 
 METAC_TAG_MAP_END
 
-#define _APPEND(x) do { \
+#define _APPEND_PARAM(x) do { \
         WITH_METAC_DECLLOC(decl, typeof(x) _x_val = x); \
         metac_entry_t *p_entry = METAC_ENTRY_FROM_DECLLOC(decl, _x_val); \
         metac_entry_t *p_param_entry = metac_entry_by_paremeter_id(p_val_entry, param_id); \
@@ -63,7 +81,7 @@ METAC_TAG_MAP_END
             metac_num_t param_id = 0; \
             metac_entry_t *p_val_entry = metac_value_entry(p_val); \
             /* append params*/ \
-            MR_FOREACH(_APPEND, _args_) \
+            MR_FOREACH(_APPEND_PARAM, _args_) \
         } \
         if (p_val != NULL) { \
             char * s = metac_value_string_ex(p_val, METAC_WMODE_deep, _tag_map_); \
@@ -105,6 +123,9 @@ int main() {
 
     printf("fn returned: %i\n", METAC_WRAP_FN_RES(NULL, test_function1_with_args,10, 22));
 
+    list_t * p_list = (list_t[]){{.x = 42.42, .p_next = (list_t[]){{ .x = 45.4, .p_next = NULL}}}};
+    printf("fn returned: %f\n", METAC_WRAP_FN_RES(NULL, test_function3_with_args, p_list));
+
     metac_tag_map_delete(p_tagmap);
     return 0;
 }
\ No newline at end of file