py/parse: Print const object value in mp_parse_node_print.

To give more information when printing the parse tree.

Signed-off-by: Damien George <damien@micropython.org>

py/parse.c

@@ -394,10 +394,12 @@ void mp_parse_node_print(const mp_print_t *print, mp_parse_node_t pn, size_t ind
         if (MP_PARSE_NODE_STRUCT_KIND(pns) == RULE_const_object) {
             mp_obj_t obj = mp_parse_node_extract_const_object(pns);
             #if MICROPY_OBJ_REPR == MICROPY_OBJ_REPR_D
-            mp_printf(print, "literal const(%016llx)\n", obj);
+            mp_printf(print, "literal const(%016llx)=", obj);
             #else
-            mp_printf(print, "literal const(%p)\n", obj);
+            mp_printf(print, "literal const(%p)=", obj);
             #endif
+            mp_obj_print_helper(print, obj, PRINT_REPR);
+            mp_printf(print, "\n");
         } else {
             size_t n = MP_PARSE_NODE_STRUCT_NUM_NODES(pns);
             #if MICROPY_DEBUG_PARSE_RULE_NAME

tests/cmdline/cmd_parsetree.py.exp

@@ -31,7 +31,7 @@
 [  13]   \(rule\|expr_stmt\)(5) (n=2)
            id(h)
 [  13]     \(rule\|atom_expr_normal\)(44) (n=2)
-[  13]       literal const(\.\+)
+[  13]       literal const(\.\+)="fstring: '{}'"
 [  13]       \(rule\|atom_expr_trailers\)(142) (n=2)
 [  13]         \(rule\|trailer_period\)(50) (n=1)
                  id(format)