py: Use new code pattern for parsing kw args with mp_arg_parse_all.

Makes code easier to read and more maintainable.

Author: dpgeorge

py/objenumerate.c

@@ -39,23 +39,25 @@ typedef struct _mp_obj_enumerate_t {
 
 STATIC mp_obj_t enumerate_iternext(mp_obj_t self_in);
 
-STATIC const mp_arg_t enumerate_make_new_args[] = {
-    { MP_QSTR_iterable, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
-    { MP_QSTR_start, MP_ARG_INT, {.u_int = 0} },
-};
-#define ENUMERATE_MAKE_NEW_NUM_ARGS MP_ARRAY_SIZE(enumerate_make_new_args)
-
 STATIC mp_obj_t enumerate_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
 #if MICROPY_CPYTHON_COMPAT
+    static const mp_arg_t allowed_args[] = {
+        { MP_QSTR_iterable, MP_ARG_REQUIRED | MP_ARG_OBJ, {.u_obj = MP_OBJ_NULL} },
+        { MP_QSTR_start, MP_ARG_INT, {.u_int = 0} },
+    };
+
     // parse args
-    mp_arg_val_t vals[ENUMERATE_MAKE_NEW_NUM_ARGS];
-    mp_arg_parse_all_kw_array(n_args, n_kw, args, ENUMERATE_MAKE_NEW_NUM_ARGS, enumerate_make_new_args, vals);
+    struct {
+        mp_arg_val_t iterable, start;
+    } arg_vals;
+    mp_arg_parse_all_kw_array(n_args, n_kw, args,
+        MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&arg_vals);
 
     // create enumerate object
     mp_obj_enumerate_t *o = m_new_obj(mp_obj_enumerate_t);
     o->base.type = type;
-    o->iter = mp_getiter(vals[0].u_obj);
-    o->cur = vals[1].u_int;
+    o->iter = mp_getiter(arg_vals.iterable.u_obj);
+    o->cur = arg_vals.start.u_int;
 #else
     (void)n_kw;
     mp_obj_enumerate_t *o = m_new_obj(mp_obj_enumerate_t);

py/objlist.c

@@ -318,16 +318,19 @@ mp_obj_t mp_obj_list_sort(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_
     };
 
     // parse args
-    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
-    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+    struct {
+        mp_arg_val_t key, reverse;
+    } args;
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args,
+        MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&args);
 
     assert(MP_OBJ_IS_TYPE(pos_args[0], &mp_type_list));
     mp_obj_list_t *self = MP_OBJ_TO_PTR(pos_args[0]);
 
     if (self->len > 1) {
         mp_quicksort(self->items, self->items + self->len - 1,
-                     args[0].u_obj == mp_const_none ? MP_OBJ_NULL : args[0].u_obj,
-                     args[1].u_bool ? mp_const_false : mp_const_true);
+                     args.key.u_obj == mp_const_none ? MP_OBJ_NULL : args.key.u_obj,
+                     args.reverse.u_bool ? mp_const_false : mp_const_true);
     }
 
     return mp_const_none;

py/objstr.c

@@ -557,11 +557,14 @@ STATIC mp_obj_t str_splitlines(size_t n_args, const mp_obj_t *pos_args, mp_map_t
     };
 
     // parse args
-    mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
-    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
+    struct {
+        mp_arg_val_t keepends;
+    } args;
+    mp_arg_parse_all(n_args - 1, pos_args + 1, kw_args,
+        MP_ARRAY_SIZE(allowed_args), allowed_args, (mp_arg_val_t*)&args);
 
     mp_obj_t new_args[2] = {pos_args[0], MP_OBJ_NEW_QSTR(MP_QSTR__backslash_n)};
-    return str_split_internal(2, new_args, SPLITLINES | (args[0].u_bool ? KEEP : 0));
+    return str_split_internal(2, new_args, SPLITLINES | (args.keepends.u_bool ? KEEP : 0));
 }
 #endif