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Implemented support for in and not in operators.

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This commit is contained in:
John R. Lenton 2014-01-11 12:39:33 +00:00
parent cf11c961b4
commit c1bef21920
6 changed files with 111 additions and 5 deletions
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16
py/objdict.c
View File

@ -57,6 +57,12 @@ static mp_obj_t dict_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
return elem->value;
}
}
case RT_COMPARE_OP_IN:
case RT_COMPARE_OP_NOT_IN:
{
mp_map_elem_t *elem = mp_map_lookup(&o->map, rhs_in, MP_MAP_LOOKUP);
return MP_BOOL((op == RT_COMPARE_OP_IN) ^ (elem == NULL));
}
default:
// op not supported
return NULL;
@ -339,10 +345,20 @@ static void dict_view_print(void (*print)(void *env, const char *fmt, ...), void
print(env, "])");
}
static mp_obj_t dict_view_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
/* only supported for the 'keys' kind until sets and dicts are refactored */
mp_obj_dict_view_t *o = lhs_in;
if (o->kind != MP_DICT_VIEW_KEYS) return NULL;
if (op != RT_COMPARE_OP_IN && op != RT_COMPARE_OP_NOT_IN) return NULL;
return dict_binary_op(op, o->dict, rhs_in);
}
static const mp_obj_type_t dict_view_type = {
{ &mp_const_type },
"dict_view",
.print = dict_view_print,
.binary_op = dict_view_binary_op,
.getiter = dict_view_getiter,
};

20
py/objset.c
View File

@ -8,6 +8,7 @@
#include "mpqstr.h"
#include "obj.h"
#include "runtime.h"
#include "runtime0.h"
#include "map.h"
typedef struct _mp_obj_set_t {
@ -31,6 +32,24 @@ void set_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj
print(env, "}");
}
static mp_obj_t set_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
mp_obj_set_t *o = lhs_in;
switch (op) {
case RT_COMPARE_OP_IN:
case RT_COMPARE_OP_NOT_IN:
{
mp_obj_t elem = mp_set_lookup(&o->set, rhs_in, false);
return ((op == RT_COMPARE_OP_IN) ^ (elem == NULL))
? mp_const_true : mp_const_false;
}
default:
// op not supported
return NULL;
}
}
static mp_obj_t set_make_new(mp_obj_t type_in, int n_args, const mp_obj_t *args) {
switch (n_args) {
case 0:
@ -58,6 +77,7 @@ const mp_obj_type_t set_type = {
{ &mp_const_type },
"set",
.print = set_print,
.binary_op = set_binary_op,
.make_new = set_make_new,
};

9
py/objstr.c
View File

@ -85,6 +85,15 @@ mp_obj_t str_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
return mp_obj_new_str(qstr_from_str_take(val, alloc_len));
}
break;
case RT_COMPARE_OP_IN:
case RT_COMPARE_OP_NOT_IN:
/* NOTE `a in b` is `b.__contains__(a)` */
if (MP_OBJ_IS_TYPE(rhs_in, &str_type)) {
const char *rhs_str = qstr_str(((mp_obj_str_t*)rhs_in)->qstr);
/* FIXME \0 in strs */
return MP_BOOL((op == RT_COMPARE_OP_IN) ^ (strstr(lhs_str, rhs_str) == NULL));
}
break;
}
return MP_OBJ_NULL; // op not supported

45
py/runtime.c
View File

@ -558,22 +558,57 @@ mp_obj_t rt_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
}
}
}
}
if (MP_OBJ_IS_OBJ(lhs)) {
mp_obj_base_t *o = lhs;
/* deal with `in` and `not in`
*
* NOTE `a in b` is `b.__contains__(a)`, hence why the generic dispatch
* needs to go below
*/
if (op == RT_COMPARE_OP_IN || op == RT_COMPARE_OP_NOT_IN) {
if (!MP_OBJ_IS_SMALL_INT(rhs)) {
mp_obj_base_t *o = rhs;
if (o->type->binary_op != NULL) {
mp_obj_t result = o->type->binary_op(op, lhs, rhs);
if (result != NULL) {
return result;
mp_obj_t res = o->type->binary_op(op, rhs, lhs);
if (res != NULL) {
return res;
}
}
if (o->type->getiter != NULL) {
/* second attempt, walk the iterator */
mp_obj_t next = NULL;
mp_obj_t iter = rt_getiter(rhs);
while ((next = rt_iternext(iter)) != mp_const_stop_iteration) {
if (mp_obj_equal(next, lhs)) {
return MP_BOOL(op == RT_COMPARE_OP_IN);
}
}
return MP_BOOL(op != RT_COMPARE_OP_IN);
}
}
nlr_jump(mp_obj_new_exception_msg_varg(
MP_QSTR_TypeError, "'%s' object is not iterable",
mp_obj_get_type_str(rhs)));
return mp_const_none;
}
if (MP_OBJ_IS_OBJ(lhs)) {
mp_obj_base_t *o = lhs;
if (o->type->binary_op != NULL) {
mp_obj_t result = o->type->binary_op(op, lhs, rhs);
if (result != NULL) {
return result;
}
}
// TODO implement dispatch for reverse binary ops
}
// TODO specify in error message what the operator is
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError,
"unsupported operand types for binary operator: '%s', '%s'",
mp_obj_get_type_str(lhs), mp_obj_get_type_str(rhs)));
return mp_const_none;
}
mp_obj_t rt_make_function_from_id(int unique_code_id) {

3
tests/basics/run-tests
View File

@ -42,4 +42,7 @@ echo "$numpassed tests passed"
if [[ $numfailed != 0 ]]
then
echo "$numfailed tests failed -$namefailed"
exit 1
else
exit 0
fi

23
tests/basics/tests/containment.py Normal file
View File

@ -0,0 +1,23 @@
for i in 1, 2:
for o in {1:2}, {1}, {1:2}.keys():
print("{} in {}: {}".format(i, o, i in o))
print("{} not in {}: {}".format(i, o, i not in o))
haystack = "supercalifragilistc"
for needle in (haystack[i:] for i in range(len(haystack))):
print(needle, "in", haystack, "::", needle in haystack)
print(needle, "not in", haystack, "::", needle not in haystack)
print(haystack, "in", needle, "::", haystack in needle)
print(haystack, "not in", needle, "::", haystack not in needle)
for needle in (haystack[:i+1] for i in range(len(haystack))):
print(needle, "in", haystack, "::", needle in haystack)
print(needle, "not in", haystack, "::", needle not in haystack)
print(haystack, "in", needle, "::", haystack in needle)
print(haystack, "not in", needle, "::", haystack not in needle)
# until here, the tests would work without the 'second attempt' iteration thing.
for i in 1, 2:
for o in [], [1], [1, 2]:
print("{} in {}: {}".format(i, o, i in o))
print("{} not in {}: {}".format(i, o, i not in o))