py: Cast type names to qstr explicitly.

The name field of type objects is of type `uint16_t` for efficiency, but
when the type is passed to `mp_printf` it must be cast explicitly to type
`qstr`.

These locations were found using an experimental gcc plugin for `mp_printf`
error checking, cross-building for x64 windows on Linux.

Signed-off-by: Jeff Epler <[email protected]>

Author: jepler

py/builtinhelp.c

@@ -135,7 +135,7 @@ static void mp_help_print_obj(const mp_obj_t obj) {
     // try to print something sensible about the given object
     mp_print_str(MP_PYTHON_PRINTER, "object ");
     mp_obj_print(obj, PRINT_STR);
-    mp_printf(MP_PYTHON_PRINTER, " is of type %q\n", type->name);
+    mp_printf(MP_PYTHON_PRINTER, " is of type %q\n", (qstr)type->name);
 
     mp_map_t *map = NULL;
     if (type == &mp_type_module) {

py/obj.c

@@ -128,7 +128,7 @@ void mp_obj_print_helper(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t
     if (MP_OBJ_TYPE_HAS_SLOT(type, print)) {
         MP_OBJ_TYPE_GET_SLOT(type, print)((mp_print_t *)print, o_in, kind);
     } else {
-        mp_printf(print, "<%q>", type->name);
+        mp_printf(print, "<%q>", (qstr)type->name);
     }
 }
 

py/objdict.c

@@ -84,7 +84,7 @@ static void dict_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_
         #endif
     }
     if (MICROPY_PY_COLLECTIONS_ORDEREDDICT && self->base.type != &mp_type_dict && kind != PRINT_JSON) {
-        mp_printf(print, "%q(", self->base.type->name);
+        mp_printf(print, "%q(", (qstr)self->base.type->name);
     }
     mp_print_str(print, "{");
     size_t cur = 0;

py/objnamedtuple.c

@@ -63,7 +63,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(namedtuple_asdict_obj, namedtuple_asdict);
 static void namedtuple_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
     (void)kind;
     mp_obj_namedtuple_t *o = MP_OBJ_TO_PTR(o_in);
-    mp_printf(print, "%q", o->tuple.base.type->name);
+    mp_printf(print, "%q", (qstr)o->tuple.base.type->name);
     const qstr *fields = ((mp_obj_namedtuple_type_t *)o->tuple.base.type)->fields;
     mp_obj_attrtuple_print_helper(print, fields, &o->tuple);
 }

py/objtype.c

@@ -977,7 +977,7 @@ static bool check_for_special_accessors(mp_obj_t key, mp_obj_t value) {
 static void type_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
     (void)kind;
     mp_obj_type_t *self = MP_OBJ_TO_PTR(self_in);
-    mp_printf(print, "<class '%q'>", self->name);
+    mp_printf(print, "<class '%q'>", (qstr)self->name);
 }
 
 static mp_obj_t type_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {