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py: Add MP_OBJ_STOP_ITERATION and make good use of it.

Browse Source 
Also make consistent use of MP_OBJ_NOT_SUPPORTED and MP_OBJ_NULL.
This helps a lot in debugging and understanding of function API.
This commit is contained in:
Damien George 2014-04-17 23:19:36 +01:00
parent 1e935d8689
commit ea8d06c39d
28 changed files with 130 additions and 121 deletions
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12
py/builtin.c
View File

@ -103,7 +103,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_abs_obj, mp_builtin_abs);
STATIC mp_obj_t mp_builtin_all(mp_obj_t o_in) {
mp_obj_t iterable = mp_getiter(o_in);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (!mp_obj_is_true(item)) {
return mp_const_false;
}
@ -116,7 +116,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_all_obj, mp_builtin_all);
STATIC mp_obj_t mp_builtin_any(mp_obj_t o_in) {
mp_obj_t iterable = mp_getiter(o_in);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (mp_obj_is_true(item)) {
return mp_const_true;
}
@ -244,7 +244,7 @@ STATIC mp_obj_t mp_builtin_max(uint n_args, const mp_obj_t *args) {
mp_obj_t iterable = mp_getiter(args[0]);
mp_obj_t max_obj = NULL;
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (max_obj == NULL || mp_binary_op(MP_BINARY_OP_LESS, max_obj, item)) {
max_obj = item;
}
@ -273,7 +273,7 @@ STATIC mp_obj_t mp_builtin_min(uint n_args, const mp_obj_t *args) {
mp_obj_t iterable = mp_getiter(args[0]);
mp_obj_t min_obj = NULL;
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (min_obj == NULL || mp_binary_op(MP_BINARY_OP_LESS, item, min_obj)) {
min_obj = item;
}
@ -298,7 +298,7 @@ MP_DEFINE_CONST_FUN_OBJ_VAR(mp_builtin_min_obj, 1, mp_builtin_min);
STATIC mp_obj_t mp_builtin_next(mp_obj_t o) {
mp_obj_t ret = mp_iternext_allow_raise(o);
if (ret == MP_OBJ_NULL) {
if (ret == MP_OBJ_STOP_ITERATION) {
nlr_raise(mp_obj_new_exception(&mp_type_StopIteration));
} else {
return ret;
@ -381,7 +381,7 @@ STATIC mp_obj_t mp_builtin_sum(uint n_args, const mp_obj_t *args) {
}
mp_obj_t iterable = mp_getiter(args[0]);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
value = mp_binary_op(MP_BINARY_OP_ADD, value, item);
}
return value;

4
py/obj.c
View File

@ -90,7 +90,7 @@ int mp_obj_is_true(mp_obj_t arg) {
mp_obj_type_t *type = mp_obj_get_type(arg);
if (type->unary_op != NULL) {
mp_obj_t result = type->unary_op(MP_UNARY_OP_BOOL, arg);
if (result != MP_OBJ_NULL) {
if (result != MP_OBJ_NOT_SUPPORTED) {
return result == mp_const_true;
}
}
@ -180,7 +180,7 @@ bool mp_obj_equal(mp_obj_t o1, mp_obj_t o2) {
mp_obj_type_t *type = mp_obj_get_type(o1);
if (type->binary_op != NULL) {
mp_obj_t r = type->binary_op(MP_BINARY_OP_EQUAL, o1, o2);
if (r != MP_OBJ_NULL) {
if (r != MP_OBJ_NOT_SUPPORTED) {
return r == mp_const_true ? true : false;
}
}

44
py/obj.h
View File

@ -1,3 +1,8 @@
// A Micro Python object is a machine word having the following form:
// - xxxx...xxx1 : a small int, bits 1 and above are the value
// - xxxx...xx10 : a qstr, bits 2 and above are the value
// - xxxx...xx00 : a pointer to an mp_obj_base_t (unless a fake object)
// All Micro Python objects are at least this type
// It must be of pointer size
@ -10,7 +15,7 @@ typedef machine_const_ptr_t mp_const_obj_t;
typedef machine_int_t mp_small_int_t;
// Anything that wants to be a Micro Python object must have
// mp_obj_base_t as its first member (except NULL and small ints)
// mp_obj_base_t as its first member (except small ints and qstrs)
struct _mp_obj_type_t;
struct _mp_obj_base_t {
@ -18,24 +23,31 @@ struct _mp_obj_base_t {
};
typedef struct _mp_obj_base_t mp_obj_base_t;
// The NULL object is used to indicate the absence of an object
// It *cannot* be used when an mp_obj_t is expected, except where explicitly allowed
// These fake objects are used to indicate certain things in arguments or return
// values, and should only be used when explicitly allowed.
//
// - MP_OBJ_NULL : used to indicate the absence of an object.
// - MP_OBJ_NOT_SUPPORTED : a return value that indicates an unsupported operation.
// - MP_OBJ_STOP_ITERATION : used instead of throwing a StopIteration, for efficiency.
// - MP_OBJ_SENTINEL : used for various internal purposes where one needs
// an object which is unique from all other objects, including MP_OBJ_NULL.
//
// For debugging purposes they are all different. For non-debug mode, we alias
// as many as we can to MP_OBJ_NULL because it's cheaper to load/compare 0.
#define MP_OBJ_NULL ((mp_obj_t)0)
// The SENTINEL object is used for various internal purposes where one needs
// an object which is unique from all other objects, including MP_OBJ_NULL.
#define MP_OBJ_SENTINEL ((mp_obj_t)8)
// The NOT_SUPPORTED object is a return value that indicates an unsupported operation.
#define MP_OBJ_NOT_SUPPORTED ((mp_obj_t)16)
#if NDEBUG
#define MP_OBJ_NULL ((mp_obj_t)0)
#define MP_OBJ_NOT_SUPPORTED ((mp_obj_t)0)
#define MP_OBJ_STOP_ITERATION ((mp_obj_t)0)
#define MP_OBJ_SENTINEL ((mp_obj_t)4)
#else
#define MP_OBJ_NULL ((mp_obj_t)0)
#define MP_OBJ_NOT_SUPPORTED ((mp_obj_t)4)
#define MP_OBJ_STOP_ITERATION ((mp_obj_t)8)
#define MP_OBJ_SENTINEL ((mp_obj_t)12)
#endif
// These macros check for small int, qstr or object, and access small int and qstr values
// - xxxx...xxx1: a small int, bits 1 and above are the value
// - xxxx...xx10: a qstr, bits 2 and above are the value
// - xxxx...xx00: a pointer to an mp_obj_base_t
// In SMALL_INT, next-to-highest bits is used as sign, so both must match for value in range
#define MP_SMALL_INT_MIN ((mp_small_int_t)(((machine_int_t)WORD_MSBIT_HIGH) >> 1))

6
py/objarray.c
View File

@ -63,7 +63,7 @@ STATIC mp_obj_t array_construct(char typecode, mp_obj_t initializer) {
mp_obj_t iterable = mp_getiter(initializer);
mp_obj_t item;
int i = 0;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (len == 0) {
array_append(array, item);
} else {
@ -108,7 +108,7 @@ STATIC mp_obj_t array_unary_op(int op, mp_obj_t o_in) {
switch (op) {
case MP_UNARY_OP_BOOL: return MP_BOOL(o->len != 0);
case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(o->len);
default: return MP_OBJ_NULL; // op not supported
default: return MP_OBJ_NOT_SUPPORTED;
}
}
@ -227,7 +227,7 @@ STATIC mp_obj_t array_it_iternext(mp_obj_t self_in) {
if (self->cur < self->array->len) {
return mp_binary_get_val_array(self->array->typecode, self->array->items, self->cur++);
} else {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}

3
py/objbool.c
View File

@ -48,8 +48,7 @@ STATIC mp_obj_t bool_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
if (MP_BINARY_OP_OR <= op && op <= MP_BINARY_OP_NOT_EQUAL) {
return mp_binary_op(op, MP_OBJ_NEW_SMALL_INT((machine_int_t)mp_obj_is_true(lhs_in)), rhs_in);
}
// operation not supported
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
const mp_obj_type_t mp_type_bool = {

4
py/objcomplex.c
View File

@ -98,7 +98,7 @@ STATIC mp_obj_t complex_unary_op(int op, mp_obj_t o_in) {
case MP_UNARY_OP_BOOL: return MP_BOOL(o->real != 0 || o->imag != 0);
case MP_UNARY_OP_POSITIVE: return o_in;
case MP_UNARY_OP_NEGATIVE: return mp_obj_new_complex(-o->real, -o->imag);
default: return MP_OBJ_NULL; // op not supported
default: return MP_OBJ_NOT_SUPPORTED;
}
}
@ -208,7 +208,7 @@ mp_obj_t mp_obj_complex_binary_op(int op, mp_float_t lhs_real, mp_float_t lhs_im
case MP_BINARY_OP_EQUAL: return MP_BOOL(lhs_real == rhs_real && lhs_imag == rhs_imag);
default:
return MP_OBJ_NULL; // op not supported
return MP_OBJ_NOT_SUPPORTED;
}
return mp_obj_new_complex(lhs_real, lhs_imag);
}

30
py/objdict.c
View File

@ -22,7 +22,7 @@ STATIC void dict_print(void (*print)(void *env, const char *fmt, ...), void *env
print(env, "{");
mp_obj_t *dict_iter = mp_obj_new_dict_iterator(self, 0);
mp_map_elem_t *next = NULL;
while ((next = dict_it_iternext_elem(dict_iter)) != NULL) {
while ((next = dict_it_iternext_elem(dict_iter)) != MP_OBJ_STOP_ITERATION) {
if (!first) {
print(env, ", ");
}
@ -52,7 +52,7 @@ STATIC mp_obj_t dict_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp
mp_obj_t dict = mp_obj_new_dict(0);
// TODO: support arbitrary seq as a pair
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
mp_obj_t *sub_items;
mp_obj_get_array_fixed_n(item, 2, &sub_items);
mp_obj_dict_store(dict, sub_items[0], sub_items[1]);
@ -77,7 +77,7 @@ STATIC mp_obj_t dict_unary_op(int op, mp_obj_t self_in) {
switch (op) {
case MP_UNARY_OP_BOOL: return MP_BOOL(self->map.used != 0);
case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT((machine_int_t)self->map.used);
default: return MP_OBJ_NULL; // op not supported for None
default: return MP_OBJ_NOT_SUPPORTED;
}
}
@ -114,7 +114,7 @@ STATIC mp_obj_t dict_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
}
default:
// op not supported
return NULL;
return MP_OBJ_NOT_SUPPORTED;
}
}
@ -160,16 +160,16 @@ STATIC mp_map_elem_t *dict_it_iternext_elem(mp_obj_t self_in) {
}
}
return NULL;
return MP_OBJ_STOP_ITERATION;
}
mp_obj_t dict_it_iternext(mp_obj_t self_in) {
mp_map_elem_t *next = dict_it_iternext_elem(self_in);
if (next != NULL) {
if (next != MP_OBJ_STOP_ITERATION) {
return next->key;
} else {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}
@ -237,7 +237,7 @@ STATIC mp_obj_t dict_fromkeys(uint n_args, const mp_obj_t *args) {
self = mp_obj_new_dict(MP_OBJ_SMALL_INT_VALUE(len));
}
while ((next = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
mp_map_lookup(&self->map, next, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = value;
}
@ -328,14 +328,14 @@ STATIC mp_obj_t dict_update(mp_obj_t self_in, mp_obj_t iterable) {
/* TODO: check for the "keys" method */
mp_obj_t iter = mp_getiter(iterable);
mp_obj_t next = NULL;
while ((next = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
mp_obj_t inneriter = mp_getiter(next);
mp_obj_t key = mp_iternext(inneriter);
mp_obj_t value = mp_iternext(inneriter);
mp_obj_t stop = mp_iternext(inneriter);
if (key == MP_OBJ_NULL
|| value == MP_OBJ_NULL
|| stop != MP_OBJ_NULL) {
if (key == MP_OBJ_STOP_ITERATION
|| value == MP_OBJ_STOP_ITERATION
|| stop != MP_OBJ_STOP_ITERATION) {
nlr_raise(mp_obj_new_exception_msg(
&mp_type_ValueError,
"dictionary update sequence has the wrong length"));
@ -381,7 +381,7 @@ STATIC mp_obj_t dict_view_it_iternext(mp_obj_t self_in) {
mp_obj_dict_view_it_t *self = self_in;
mp_map_elem_t *next = dict_it_iternext_elem(self->iter);
if (next != NULL) {
if (next != MP_OBJ_STOP_ITERATION) {
switch (self->kind) {
case MP_DICT_VIEW_ITEMS:
{
@ -397,7 +397,7 @@ STATIC mp_obj_t dict_view_it_iternext(mp_obj_t self_in) {
return mp_const_none;
}
} else {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}
@ -426,7 +426,7 @@ STATIC void dict_view_print(void (*print)(void *env, const char *fmt, ...), void
print(env, "([");
mp_obj_t *self_iter = dict_view_getiter(self);
mp_obj_t *next = NULL;
while ((next = dict_view_it_iternext(self_iter)) != MP_OBJ_NULL) {
while ((next = dict_view_it_iternext(self_iter)) != MP_OBJ_STOP_ITERATION) {
if (!first) {
print(env, ", ");
}

4
py/objenumerate.c
View File

@ -38,8 +38,8 @@ STATIC mp_obj_t enumerate_iternext(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_enumerate));
mp_obj_enumerate_t *self = self_in;
mp_obj_t next = mp_iternext(self->iter);
if (next == MP_OBJ_NULL) {
return MP_OBJ_NULL;
if (next == MP_OBJ_STOP_ITERATION) {
return MP_OBJ_STOP_ITERATION;
} else {
mp_obj_t items[] = {MP_OBJ_NEW_SMALL_INT(self->cur++), next};
return mp_obj_new_tuple(2, items);

4
py/objfilter.c
View File

@ -30,7 +30,7 @@ STATIC mp_obj_t filter_iternext(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_filter));
mp_obj_filter_t *self = self_in;
mp_obj_t next;
while ((next = mp_iternext(self->iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(self->iter)) != MP_OBJ_STOP_ITERATION) {
mp_obj_t val;
if (self->fun != mp_const_none) {
val = mp_call_function_n_kw(self->fun, 1, 0, &next);
@ -41,7 +41,7 @@ STATIC mp_obj_t filter_iternext(mp_obj_t self_in) {
return next;
}
}
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
const mp_obj_type_t mp_type_filter = {

2
py/objfloat.c
View File

@ -140,7 +140,7 @@ mp_obj_t mp_obj_float_binary_op(int op, mp_float_t lhs_val, mp_obj_t rhs_in) {
case MP_BINARY_OP_MORE_EQUAL: return MP_BOOL(lhs_val >= rhs_val);
default:
return MP_OBJ_NULL; // op not supported
return MP_OBJ_NOT_SUPPORTED;
}
return mp_obj_new_float(lhs_val);
}

16
py/objgenerator.c
View File

@ -79,7 +79,7 @@ mp_vm_return_kind_t mp_obj_gen_resume(mp_obj_t self_in, mp_obj_t send_value, mp_
assert(MP_OBJ_IS_TYPE(self_in, &mp_type_gen_instance));
mp_obj_gen_instance_t *self = self_in;
if (self->ip == 0) {
*ret_val = MP_OBJ_NULL;
*ret_val = MP_OBJ_STOP_ITERATION;
return MP_VM_RETURN_NORMAL;
}
if (self->sp == self->state - 1) {
@ -130,8 +130,8 @@ STATIC mp_obj_t gen_resume_and_raise(mp_obj_t self_in, mp_obj_t send_value, mp_o
switch (mp_obj_gen_resume(self_in, send_value, throw_value, &ret)) {
case MP_VM_RETURN_NORMAL:
// Optimize return w/o value in case generator is used in for loop
if (ret == mp_const_none || ret == MP_OBJ_NULL) {
return MP_OBJ_NULL;
if (ret == mp_const_none || ret == MP_OBJ_STOP_ITERATION) {
return MP_OBJ_STOP_ITERATION;
} else {
nlr_raise(mp_obj_new_exception_args(&mp_type_StopIteration, 1, &ret));
}
@ -143,11 +143,11 @@ STATIC mp_obj_t gen_resume_and_raise(mp_obj_t self_in, mp_obj_t send_value, mp_o
return ret;
case MP_VM_RETURN_EXCEPTION:
// TODO: Optimization of returning MP_OBJ_NULL is really part
// TODO: Optimization of returning MP_OBJ_STOP_ITERATION is really part
// of mp_iternext() protocol, but this function is called by other methods
// too, which may not handled MP_OBJ_NULL.
// too, which may not handled MP_OBJ_STOP_ITERATION.
if (mp_obj_is_subclass_fast(mp_obj_get_type(ret), &mp_type_StopIteration)) {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
} else {
nlr_raise(ret);
}
@ -164,7 +164,7 @@ mp_obj_t gen_instance_iternext(mp_obj_t self_in) {
STATIC mp_obj_t gen_instance_send(mp_obj_t self_in, mp_obj_t send_value) {
mp_obj_t ret = gen_resume_and_raise(self_in, send_value, MP_OBJ_NULL);
if (ret == MP_OBJ_NULL) {
if (ret == MP_OBJ_STOP_ITERATION) {
nlr_raise(mp_obj_new_exception(&mp_type_StopIteration));
} else {
return ret;
@ -179,7 +179,7 @@ STATIC mp_obj_t gen_instance_throw(uint n_args, const mp_obj_t *args) {
exc = mp_make_raise_obj(exc);
mp_obj_t ret = gen_resume_and_raise(args[0], mp_const_none, exc);
if (ret == MP_OBJ_NULL) {
if (ret == MP_OBJ_STOP_ITERATION) {
nlr_raise(mp_obj_new_exception(&mp_type_StopIteration));
} else {
return ret;

4
py/objgetitemiter.c
View File

@ -26,8 +26,8 @@ STATIC mp_obj_t it_iternext(mp_obj_t self_in) {
} else {
// an exception was raised
if (mp_obj_get_type(nlr.ret_val) == &mp_type_StopIteration) {
// return MP_OBJ_NULL instead of raising StopIteration
return MP_OBJ_NULL;
// return MP_OBJ_STOP_ITERATION instead of raising StopIteration
return MP_OBJ_STOP_ITERATION;
} else {
// re-raise exception
nlr_raise(nlr.ret_val);

4
py/objint.c
View File

@ -193,7 +193,7 @@ bool mp_obj_int_is_positive(mp_obj_t self_in) {
// This is called for operations on SMALL_INT that are not handled by mp_unary_op
mp_obj_t mp_obj_int_unary_op(int op, mp_obj_t o_in) {
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
// This is called for operations on SMALL_INT that are not handled by mp_binary_op
@ -262,7 +262,7 @@ mp_obj_t mp_obj_int_binary_op_extra_cases(int op, mp_obj_t lhs_in, mp_obj_t rhs_
return mp_binary_op(op, rhs_in, lhs_in);
}
}
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
// this is a classmethod

7
py/objint_longlong.c
View File

@ -37,7 +37,7 @@ mp_obj_t mp_obj_int_unary_op(int op, mp_obj_t o_in) {
case MP_UNARY_OP_POSITIVE: return o_in;
case MP_UNARY_OP_NEGATIVE: return mp_obj_new_int_from_ll(-o->val);
case MP_UNARY_OP_INVERT: return mp_obj_new_int_from_ll(~o->val);
default: return NULL; // op not supported
default: return MP_OBJ_NOT_SUPPORTED;
}
}
@ -50,7 +50,7 @@ mp_obj_t mp_obj_int_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
} else if (MP_OBJ_IS_TYPE(lhs_in, &mp_type_int)) {
lhs_val = ((mp_obj_int_t*)lhs_in)->val;
} else {
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
if (MP_OBJ_IS_SMALL_INT(rhs_in)) {
@ -108,8 +108,7 @@ mp_obj_t mp_obj_int_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
return MP_BOOL(lhs_val == rhs_val);
default:
// op not supported
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
}

6
py/objint_mpz.c
View File

@ -82,7 +82,7 @@ mp_obj_t mp_obj_int_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
zlhs = &((mp_obj_int_t*)lhs_in)->mpz;
} else {
// unsupported type
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
// if rhs is small int, then lhs was not (otherwise mp_binary_op handles it)
@ -187,7 +187,7 @@ mp_obj_t mp_obj_int_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
break;
default:
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
return res;
@ -207,7 +207,7 @@ mp_obj_t mp_obj_int_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
return MP_BOOL(cmp == 0);
default:
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
}
}

9
py/objlist.c
View File

@ -36,7 +36,7 @@ STATIC void list_print(void (*print)(void *env, const char *fmt, ...), void *env
STATIC mp_obj_t list_extend_from_iter(mp_obj_t list, mp_obj_t iterable) {
mp_obj_t iter = mp_getiter(iterable);
mp_obj_t item;
while ((item = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
mp_obj_list_append(list, item);
}
return list;
@ -81,7 +81,7 @@ STATIC mp_obj_t list_unary_op(int op, mp_obj_t self_in) {
switch (op) {
case MP_UNARY_OP_BOOL: return MP_BOOL(self->len != 0);
case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(self->len);
default: return MP_OBJ_NULL; // op not supported for None
default: return MP_OBJ_NOT_SUPPORTED;
}
}
@ -121,8 +121,7 @@ STATIC mp_obj_t list_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
return MP_BOOL(list_cmp_helper(op, lhs, rhs));
default:
// op not supported
return NULL;
return MP_OBJ_NOT_SUPPORTED;
}
}
@ -423,7 +422,7 @@ mp_obj_t list_it_iternext(mp_obj_t self_in) {
self->cur += 1;
return o_out;
} else {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}

4
py/objmap.c
View File

@ -41,9 +41,9 @@ STATIC mp_obj_t map_iternext(mp_obj_t self_in) {
for (int i = 0; i < self->n_iters; i++) {
mp_obj_t next = mp_iternext(self->iters[i]);
if (next == MP_OBJ_NULL) {
if (next == MP_OBJ_STOP_ITERATION) {
m_del(mp_obj_t, nextses, self->n_iters);
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
nextses[i] = next;
}

2
py/objnone.c
View File

@ -18,7 +18,7 @@ STATIC void none_print(void (*print)(void *env, const char *fmt, ...), void *env
STATIC mp_obj_t none_unary_op(int op, mp_obj_t o_in) {
switch (op) {
case MP_UNARY_OP_BOOL: return mp_const_false;
default: return MP_OBJ_NULL; // op not supported for None
default: return MP_OBJ_NOT_SUPPORTED;
}
}

2
py/objrange.c
View File

@ -25,7 +25,7 @@ STATIC mp_obj_t range_it_iternext(mp_obj_t o_in) {
o->cur += o->step;
return o_out;
} else {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}

18
py/objset.c
View File

@ -59,7 +59,7 @@ STATIC mp_obj_t set_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_
mp_obj_t set = mp_obj_new_set(0, NULL);
mp_obj_t iterable = mp_getiter(args[0]);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
mp_obj_set_store(set, item);
}
return set;
@ -90,7 +90,7 @@ STATIC mp_obj_t set_it_iternext(mp_obj_t self_in) {
}
}
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
STATIC mp_obj_t set_getiter(mp_obj_t set_in) {
@ -163,7 +163,7 @@ STATIC mp_obj_t set_diff_int(int n_args, const mp_obj_t *args, bool update) {
} else {
mp_obj_t iter = mp_getiter(other);
mp_obj_t next;
while ((next = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
set_discard(self, next);
}
}
@ -194,7 +194,7 @@ STATIC mp_obj_t set_intersect_int(mp_obj_t self_in, mp_obj_t other, bool update)
mp_obj_t iter = mp_getiter(other);
mp_obj_t next;
while ((next = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
if (mp_set_lookup(&self->set, next, MP_MAP_LOOKUP)) {
set_add(out, next);
}
@ -226,7 +226,7 @@ STATIC mp_obj_t set_isdisjoint(mp_obj_t self_in, mp_obj_t other) {
mp_obj_t iter = mp_getiter(other);
mp_obj_t next;
while ((next = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
if (mp_set_lookup(&self->set, next, MP_MAP_LOOKUP)) {
return mp_const_false;
}
@ -259,7 +259,7 @@ STATIC mp_obj_t set_issubset_internal(mp_obj_t self_in, mp_obj_t other_in, bool
} else {
mp_obj_t iter = set_getiter(self);
mp_obj_t next;
while ((next = set_it_iternext(iter)) != MP_OBJ_NULL) {
while ((next = set_it_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
if (!mp_set_lookup(&other->set, next, MP_MAP_LOOKUP)) {
out = false;
break;
@ -331,7 +331,7 @@ STATIC mp_obj_t set_symmetric_difference_update(mp_obj_t self_in, mp_obj_t other
mp_obj_set_t *self = self_in;
mp_obj_t iter = mp_getiter(other_in);
mp_obj_t next;
while ((next = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
mp_set_lookup(&self->set, next, MP_MAP_LOOKUP_REMOVE_IF_FOUND | MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
}
return mp_const_none;
@ -349,7 +349,7 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_2(set_symmetric_difference_obj, set_symmetric_dif
STATIC void set_update_int(mp_obj_set_t *self, mp_obj_t other_in) {
mp_obj_t iter = mp_getiter(other_in);
mp_obj_t next;
while ((next = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
mp_set_lookup(&self->set, next, MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
}
}
@ -379,7 +379,7 @@ STATIC mp_obj_t set_unary_op(int op, mp_obj_t self_in) {
switch (op) {
case MP_UNARY_OP_BOOL: return MP_BOOL(self->set.used != 0);
case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT((machine_int_t)self->set.used);
default: return MP_OBJ_NULL; // op not supported for None
default: return MP_OBJ_NOT_SUPPORTED;
}
}

8
py/objstr.c
View File

@ -161,7 +161,7 @@ STATIC mp_obj_t bytes_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const m
mp_obj_t iterable = mp_getiter(args[0]);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (len == -1) {
vstr_add_char(vstr, MP_OBJ_SMALL_INT_VALUE(item));
} else {
@ -285,7 +285,7 @@ STATIC mp_obj_t str_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
}
}
return MP_OBJ_NULL; // op not supported
return MP_OBJ_NOT_SUPPORTED;
}
STATIC mp_obj_t str_subscr(mp_obj_t self_in, mp_obj_t index, mp_obj_t value) {
@ -1554,7 +1554,7 @@ STATIC mp_obj_t str_it_iternext(mp_obj_t self_in) {
self->cur += 1;
return o_out;
} else {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}
@ -1573,7 +1573,7 @@ STATIC mp_obj_t bytes_it_iternext(mp_obj_t self_in) {
self->cur += 1;
return o_out;
} else {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}

6
py/objtuple.c
View File

@ -52,7 +52,7 @@ mp_obj_t mp_obj_tuple_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const m
mp_obj_t iterable = mp_getiter(args[0]);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (len >= alloc) {
items = m_renew(mp_obj_t, items, alloc, alloc * 2);
alloc *= 2;
@ -88,7 +88,7 @@ mp_obj_t tuple_unary_op(int op, mp_obj_t self_in) {
switch (op) {
case MP_UNARY_OP_BOOL: return MP_BOOL(self->len != 0);
case MP_UNARY_OP_LEN: return MP_OBJ_NEW_SMALL_INT(self->len);
default: return MP_OBJ_NULL; // op not supported for None
default: return MP_OBJ_NOT_SUPPORTED;
}
}
@ -249,7 +249,7 @@ STATIC mp_obj_t tuple_it_iternext(mp_obj_t self_in) {
self->cur += 1;
return o_out;
} else {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
}

12
py/objtype.c
View File

@ -43,14 +43,14 @@ STATIC mp_obj_t mp_obj_class_lookup(const mp_obj_type_t *type, qstr attr) {
// for a const struct, this entry might be NULL
if (type->bases_tuple == MP_OBJ_NULL) {
return NULL;
return MP_OBJ_NULL;
}
uint len;
mp_obj_t *items;
mp_obj_tuple_get(type->bases_tuple, &len, &items);
if (len == 0) {
return NULL;
return MP_OBJ_NULL;
}
for (uint i = 0; i < len - 1; i++) {
assert(MP_OBJ_IS_TYPE(items[i], &mp_type_type));
@ -133,13 +133,13 @@ STATIC mp_obj_t class_unary_op(int op, mp_obj_t self_in) {
mp_obj_class_t *self = self_in;
qstr op_name = unary_op_method_name[op];
if (op_name == 0) {
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
mp_obj_t member = mp_obj_class_lookup(self->base.type, op_name);
if (member != MP_OBJ_NULL) {
return mp_call_function_1(member, self_in);
} else {
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
}
@ -211,7 +211,7 @@ STATIC mp_obj_t class_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
mp_obj_class_t *lhs = lhs_in;
qstr op_name = binary_op_method_name[op];
if (op_name == 0) {
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
mp_obj_t member = mp_obj_class_lookup(lhs->base.type, op_name);
if (member != MP_OBJ_NULL) {
@ -221,7 +221,7 @@ STATIC mp_obj_t class_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
dest[2] = rhs_in;
return mp_call_method_n_kw(1, 0, dest);
} else {
return MP_OBJ_NULL;
return MP_OBJ_NOT_SUPPORTED;
}
}

6
py/objzip.c
View File

@ -30,16 +30,16 @@ STATIC mp_obj_t zip_iternext(mp_obj_t self_in) {
mp_obj_zip_t *self = self_in;
mp_obj_t *items;
if (self->n_iters == 0) {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
mp_obj_t o = mp_obj_new_tuple(self->n_iters, NULL);
mp_obj_tuple_get(o, NULL, &items);
for (int i = 0; i < self->n_iters; i++) {
mp_obj_t next = mp_iternext(self->iters[i]);
if (next == MP_OBJ_NULL) {
if (next == MP_OBJ_STOP_ITERATION) {
mp_obj_tuple_del(o);
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
items[i] = next;
}

26
py/runtime.c
View File

@ -163,7 +163,7 @@ mp_obj_t mp_unary_op(int op, mp_obj_t arg) {
mp_obj_type_t *type = mp_obj_get_type(arg);
if (type->unary_op != NULL) {
mp_obj_t result = type->unary_op(op, arg);
if (result != NULL) {
if (result != MP_OBJ_NOT_SUPPORTED) {
return result;
}
}
@ -402,7 +402,7 @@ mp_obj_t mp_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
mp_obj_type_t *type = mp_obj_get_type(rhs);
if (type->binary_op != NULL) {
mp_obj_t res = type->binary_op(op, rhs, lhs);
if (res != MP_OBJ_NULL) {
if (res != MP_OBJ_NOT_SUPPORTED) {
return res;
}
}
@ -410,7 +410,7 @@ mp_obj_t mp_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
/* second attempt, walk the iterator */
mp_obj_t next = NULL;
mp_obj_t iter = mp_getiter(rhs);
while ((next = mp_iternext(iter)) != MP_OBJ_NULL) {
while ((next = mp_iternext(iter)) != MP_OBJ_STOP_ITERATION) {
if (mp_obj_equal(next, lhs)) {
return mp_const_true;
}
@ -430,7 +430,7 @@ generic_binary_op:
type = mp_obj_get_type(lhs);
if (type->binary_op != NULL) {
mp_obj_t result = type->binary_op(op, lhs, rhs);
if (result != MP_OBJ_NULL) {
if (result != MP_OBJ_NOT_SUPPORTED) {
return result;
}
}
@ -580,7 +580,7 @@ mp_obj_t mp_call_method_n_kw_var(bool have_self, uint n_args_n_kw, const mp_obj_
// extract the variable position args from the iterator
mp_obj_t iterable = mp_getiter(pos_seq);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (args2_len >= args2_alloc) {
args2 = m_renew(mp_obj_t, args2, args2_alloc, args2_alloc * 2);
args2_alloc *= 2;
@ -617,7 +617,7 @@ mp_obj_t mp_call_method_n_kw_var(bool have_self, uint n_args_n_kw, const mp_obj_
mp_load_method(kw_dict, MP_QSTR_items, dest);
mp_obj_t iterable = mp_getiter(mp_call_method_n_kw(0, 0, dest));
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
if (args2_len + 1 >= args2_alloc) {
uint new_alloc = args2_alloc * 2;
if (new_alloc < 4) {
@ -662,12 +662,12 @@ void mp_unpack_sequence(mp_obj_t seq_in, uint num, mp_obj_t *items) {
for (seq_len = 0; seq_len < num; seq_len++) {
mp_obj_t el = mp_iternext(iterable);
if (el == MP_OBJ_NULL) {
if (el == MP_OBJ_STOP_ITERATION) {
goto too_short;
}
items[num - 1 - seq_len] = el;
}
if (mp_iternext(iterable) != MP_OBJ_NULL) {
if (mp_iternext(iterable) != MP_OBJ_STOP_ITERATION) {
goto too_long;
}
}
@ -716,13 +716,13 @@ void mp_unpack_ex(mp_obj_t seq_in, uint num_in, mp_obj_t *items) {
mp_obj_t item;
for (seq_len = 0; seq_len < num_left; seq_len++) {
item = mp_iternext(iterable);
if (item == MP_OBJ_NULL) {
if (item == MP_OBJ_STOP_ITERATION) {
goto too_short;
}
items[num_left + num_right + 1 - 1 - seq_len] = item;
}
mp_obj_t rest = mp_obj_new_list(0, NULL);
while ((item = mp_iternext(iterable)) != MP_OBJ_NULL) {
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
mp_obj_list_append(rest, item);
}
uint rest_len;
@ -864,7 +864,7 @@ mp_obj_t mp_getiter(mp_obj_t o_in) {
}
}
// may return MP_OBJ_NULL as an optimisation instead of raise StopIteration()
// may return MP_OBJ_STOP_ITERATION as an optimisation instead of raise StopIteration()
// may also raise StopIteration()
mp_obj_t mp_iternext_allow_raise(mp_obj_t o_in) {
mp_obj_type_t *type = mp_obj_get_type(o_in);
@ -883,7 +883,7 @@ mp_obj_t mp_iternext_allow_raise(mp_obj_t o_in) {
}
}
// will always return MP_OBJ_NULL instead of raising StopIteration() (or any subclass thereof)
// will always return MP_OBJ_STOP_ITERATION instead of raising StopIteration() (or any subclass thereof)
// may raise other exceptions
mp_obj_t mp_iternext(mp_obj_t o_in) {
mp_obj_type_t *type = mp_obj_get_type(o_in);
@ -902,7 +902,7 @@ mp_obj_t mp_iternext(mp_obj_t o_in) {
return ret;
} else {
if (mp_obj_is_subclass_fast(mp_obj_get_type(nlr.ret_val), &mp_type_StopIteration)) {
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
} else {
nlr_raise(nlr.ret_val);
}

4
py/runtime.h
View File

@ -50,8 +50,8 @@ void mp_load_method_maybe(mp_obj_t base, qstr attr, mp_obj_t *dest);
void mp_store_attr(mp_obj_t base, qstr attr, mp_obj_t val);
mp_obj_t mp_getiter(mp_obj_t o);
mp_obj_t mp_iternext_allow_raise(mp_obj_t o); // may return MP_OBJ_NULL instead of raising StopIteration()
mp_obj_t mp_iternext(mp_obj_t o); // will always return MP_OBJ_NULL instead of raising StopIteration(...)
mp_obj_t mp_iternext_allow_raise(mp_obj_t o); // may return MP_OBJ_STOP_ITERATION instead of raising StopIteration()
mp_obj_t mp_iternext(mp_obj_t o); // will always return MP_OBJ_STOP_ITERATION instead of raising StopIteration(...)
mp_vm_return_kind_t mp_resume(mp_obj_t self_in, mp_obj_t send_value, mp_obj_t throw_value, mp_obj_t *ret_val);
mp_obj_t mp_make_raise_obj(mp_obj_t o);

2
py/stream.c
View File

@ -154,7 +154,7 @@ mp_obj_t mp_stream_unbuffered_iter(mp_obj_t self) {
if (sz != 0) {
return l_in;
}
return MP_OBJ_NULL;
return MP_OBJ_STOP_ITERATION;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_stream_read_obj, 1, 2, stream_read);

2
py/vm.c
View File

@ -623,7 +623,7 @@ unwind_jump:
DECODE_ULABEL; // the jump offset if iteration finishes; for labels are always forward
save_sp = sp;
obj1 = mp_iternext_allow_raise(TOP());
if (obj1 == MP_OBJ_NULL) {
if (obj1 == MP_OBJ_STOP_ITERATION) {
--sp; // pop the exhausted iterator
ip += unum; // jump to after for-block
} else {