kuroko-lang/kuroko
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Use krk_unpackIterable (and a temporary tuple) in OP_UNPACK

Browse Source
This commit is contained in:
K. Lange 2022-07-05 14:45:47 +09:00
parent eabe6f9ecf
commit ee1420cd35
2 changed files with 35 additions and 61 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

92
src/vm.c
View File

@ -609,6 +609,19 @@ static void multipleDefs(const KrkClosure * closure, int destination) {
"<unnamed>")));
}
static int _unpack_op(void * context, const KrkValue * values, size_t count) {
KrkTuple * output = context;
if (unlikely(output->values.count + count > output->values.capacity)) {
krk_runtimeError(vm.exceptions->valueError, "too many values to unpack (expected %zu)",
output->values.capacity);
return 1;
}
for (size_t i = 0; i < count; ++i) {
output->values.values[output->values.count++] = values[i];
}
return 0;
}
static int _unpack_args(void * context, const KrkValue * values, size_t count) {
KrkValueArray * positionals = context;
if (positionals->count + count > positionals->capacity) {
@ -3295,66 +3308,27 @@ _finishReturn: (void)0;
ONE_BYTE_OPERAND;
size_t count = OPERAND;
KrkValue sequence = krk_peek(0);
/* First figure out what it is and if we can unpack it. */
#define unpackArray(counter, indexer) do { \
if (counter != count) { \
krk_runtimeError(vm.exceptions->valueError, "Wrong number of values to unpack (wanted %d, got %d)", (int)count, (int)counter); \
break; \
} \
for (size_t i = 1; i < counter; ++i) { \
krk_push(indexer); \
} \
size_t i = 0; \
krk_currentThread.stackTop[-count] = indexer; \
} while (0)
if (IS_TUPLE(sequence)) {
unpackArray(AS_TUPLE(sequence)->values.count, AS_TUPLE(sequence)->values.values[i]);
} else if (IS_INSTANCE(sequence) && AS_INSTANCE(sequence)->_class == vm.baseClasses->listClass) {
unpackArray(AS_LIST(sequence)->count, AS_LIST(sequence)->values[i]);
} else if (IS_INSTANCE(sequence) && AS_INSTANCE(sequence)->_class == vm.baseClasses->dictClass) {
unpackArray(AS_DICT(sequence)->count, krk_dict_nth_key_fast(AS_DICT(sequence)->capacity, AS_DICT(sequence)->entries, i));
} else if (IS_STRING(sequence)) {
unpackArray(AS_STRING(sequence)->codesLength, krk_string_get(2,(KrkValue[]){sequence,INTEGER_VAL(i)},0));
} else {
KrkClass * type = krk_getType(sequence);
if (!type->_iter) {
krk_runtimeError(vm.exceptions->typeError, "'%s' object is not iterable", krk_typeName(sequence));
goto _finishException;
} else {
size_t stackStart = krk_currentThread.stackTop - krk_currentThread.stack - 1;
size_t counter = 0;
for (size_t i = 0; i < count-1; i++) {
krk_push(NONE_VAL());
}
/* Create the iterator */
krk_push(krk_currentThread.stack[stackStart]);
krk_push(krk_callDirect(type->_iter, 1));
do {
/* Call it until it gives us itself */
krk_push(krk_currentThread.stackTop[-1]);
krk_push(krk_callStack(0));
if (krk_valuesSame(krk_currentThread.stackTop[-2], krk_currentThread.stackTop[-1])) {
/* We're done. */
krk_pop(); /* The result of iteration */
krk_pop(); /* The iterator */
if (counter != count) {
krk_runtimeError(vm.exceptions->valueError, "Wrong number of values to unpack (wanted %d, got %d)", (int)count, (int)counter);
goto _finishException;
}
break;
}
if (counter == count) {
krk_runtimeError(vm.exceptions->valueError, "Wrong number of values to unpack (wanted %d, got %d)", (int)count, (int)counter);
goto _finishException;
}
/* Rotate */
krk_currentThread.stack[stackStart+counter] = krk_pop();
counter++;
} while (1);
}
KrkTuple * values = krk_newTuple(count);
krk_push(OBJECT_VAL(values));
if (unlikely(krk_unpackIterable(sequence, values, _unpack_op))) {
goto _finishException;
}
#undef unpackArray
if (unlikely(values->values.count != count)) {
krk_runtimeError(vm.exceptions->valueError, "not enough values to unpack (expected %zu, got %zu)", count, values->values.count);
goto _finishException;
}
if (unlikely(count == 0)) {
krk_pop();
krk_pop();
break;
}
/* We no longer need the sequence */
krk_swap(1);
krk_pop();
for (size_t i = 1; i < values->values.count; ++i) {
krk_push(values->values.values[i]);
}
krk_currentThread.stackTop[-count] = values->values.values[0];
break;
}
}

4
test/testIteratorUnpack.krk.expect
View File

@ -1,4 +1,4 @@
0 1 2
0 1 2
ValueError('Wrong number of values to unpack (wanted 2, got 2)')
ValueError('Wrong number of values to unpack (wanted 4, got 3)')
ValueError('too many values to unpack (expected 2)')
ValueError('not enough values to unpack (expected 4, got 3)')