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Implement the for of statement (#2871)

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JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2019-06-07 06:35:42 -04:00
committed by Dániel Bátyai
parent b6fc4e13ae
commit 343e80053b
15 changed files with 530 additions and 48 deletions
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jerry-core/vm/vm.c
+88
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@@ -24,6 +24,7 @@
#include "ecma-function-object.h"
#include "ecma-gc.h"
#include "ecma-helpers.h"
#include "ecma-iterator-object.h"
#include "ecma-lcache.h"
#include "ecma-lex-env.h"
#include "ecma-objects.h"
@@ -2888,6 +2889,93 @@ vm_loop (vm_frame_ctx_t *frame_ctx_p) /**< frame context */
}
continue;
}
#if ENABLED (JERRY_ES2015_FOR_OF)
case VM_OC_FOR_OF_CREATE_CONTEXT:
{
ecma_value_t value = *(--stack_top_p);
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
ecma_value_t iterator = ecma_op_get_iterator (value, ECMA_VALUE_EMPTY);
ecma_free_value (value);
if (ECMA_IS_VALUE_ERROR (iterator))
{
result = iterator;
goto error;
}
ecma_value_t iterator_step = ecma_op_iterator_step (iterator);
if (ECMA_IS_VALUE_ERROR (iterator_step))
{
ecma_free_value (iterator);
result = iterator_step;
goto error;
}
if (ecma_is_value_false (iterator_step))
{
ecma_free_value (iterator);
byte_code_p = byte_code_start_p + branch_offset;
continue;
}
branch_offset += (int32_t) (byte_code_start_p - frame_ctx_p->byte_code_start_p);
VM_PLUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_FOR_OF_CONTEXT_STACK_ALLOCATION);
stack_top_p += PARSER_FOR_OF_CONTEXT_STACK_ALLOCATION;
stack_top_p[-1] = (ecma_value_t) VM_CREATE_CONTEXT (VM_CONTEXT_FOR_OF, branch_offset);
stack_top_p[-2] = iterator_step;
stack_top_p[-3] = iterator;
continue;
}
case VM_OC_FOR_OF_GET_NEXT:
{
ecma_value_t *context_top_p = frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth;
JERRY_ASSERT (VM_GET_CONTEXT_TYPE (context_top_p[-1]) == VM_CONTEXT_FOR_OF);
ecma_value_t next_value = ecma_op_iterator_value (context_top_p[-2]);
if (ECMA_IS_VALUE_ERROR (next_value))
{
result = next_value;
goto error;
}
*stack_top_p++ = next_value;
continue;
}
case VM_OC_FOR_OF_HAS_NEXT:
{
JERRY_ASSERT (frame_ctx_p->registers_p + register_end + frame_ctx_p->context_depth == stack_top_p);
ecma_value_t iterator_step = ecma_op_iterator_step (stack_top_p[-3]);
if (ECMA_IS_VALUE_ERROR (iterator_step))
{
result = iterator_step;
goto error;
}
if (!ecma_is_value_false (iterator_step))
{
ecma_free_value (stack_top_p[-2]);
stack_top_p[-2] = iterator_step;
byte_code_p = byte_code_start_p + branch_offset;
continue;
}
ecma_free_value (stack_top_p[-2]);
ecma_free_value (stack_top_p[-3]);
VM_MINUS_EQUAL_U16 (frame_ctx_p->context_depth, PARSER_FOR_OF_CONTEXT_STACK_ALLOCATION);
stack_top_p -= PARSER_FOR_OF_CONTEXT_STACK_ALLOCATION;
continue;
}
#endif /* ENABLED (JERRY_ES2015_FOR_OF) */
case VM_OC_TRY:
{
/* Try opcode simply creates the try context. */