Implement Array.from routine (#3402)

The patch also revealed a minor issue about Map[Symbol.iterator] which have been fixed as well.

Co-authored-by: Daniella Barsony bella@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2019-12-03 15:39:11 +01:00
committed by Zoltan Herczeg
parent d31871d7c9
commit bfc495f0cb
6 changed files with 699 additions and 24 deletions
@@ -15,14 +15,16 @@
#include "ecma-alloc.h"
#include "ecma-builtins.h"
#include "ecma-builtin-helpers.h"
#include "ecma-conversion.h"
#include "ecma-exceptions.h"
#include "ecma-function-object.h"
#include "ecma-gc.h"
#include "ecma-globals.h"
#include "ecma-helpers.h"
#include "ecma-iterator-object.h"
#include "ecma-objects.h"
#include "ecma-array-object.h"
#include "ecma-try-catch-macro.h"
#include "jrt.h"
#if ENABLED (JERRY_BUILTIN_ARRAY)
@@ -62,6 +64,334 @@ ecma_builtin_array_object_is_array (ecma_value_t this_arg, /**< 'this' argument
return ecma_make_boolean_value (ecma_is_value_array (arg));
} /* ecma_builtin_array_object_is_array */
#if ENABLED (JERRY_ES2015)
/**
* The Array object's 'from' routine
*
* See also:
* ECMA-262 v6, 22.1.2.1
*
* @return ecma value
* Returned value must be freed with ecma_free_value.
*/
static ecma_value_t
ecma_builtin_array_object_from (ecma_value_t this_arg, /**< 'this' argument */
const ecma_value_t *arguments_list_p, /**< arguments list */
ecma_length_t arguments_list_len) /**< number of arguments */
{
/* 1. */
ecma_value_t constructor = this_arg;
ecma_value_t call_this_arg = ECMA_VALUE_UNDEFINED;
ecma_value_t items = arguments_list_p[0];
ecma_value_t mapfn = (arguments_list_len > 1) ? arguments_list_p[1] : ECMA_VALUE_UNDEFINED;
/* 2. */
ecma_object_t *mapfn_obj_p = NULL;
/* 3. */
if (!ecma_is_value_undefined (mapfn))
{
/* 3.a */
if (!ecma_op_is_callable (mapfn))
{
return ecma_raise_type_error (ECMA_ERR_MSG ("Callback function is not callable."));
}
/* 3.b */
if (arguments_list_len > 2)
{
call_this_arg = arguments_list_p[2];
}
/* 3.c */
mapfn_obj_p = ecma_get_object_from_value (mapfn);
}
/* 4. */
ecma_value_t using_iterator = ecma_op_get_method_by_symbol_id (items, LIT_MAGIC_STRING_ITERATOR);
/* 5. */
if (ECMA_IS_VALUE_ERROR (using_iterator))
{
return using_iterator;
}
ecma_value_t ret_value = ECMA_VALUE_ERROR;
/* 6. */
if (!ecma_is_value_undefined (using_iterator))
{
ecma_value_t array;
/* 6.a */
if (ecma_is_constructor (constructor))
{
ecma_object_t *constructor_obj_p = ecma_get_object_from_value (constructor);
array = ecma_op_function_construct (constructor_obj_p, ECMA_VALUE_UNDEFINED, NULL, 0);
if (ecma_is_value_undefined (array) || ecma_is_value_null (array))
{
ecma_free_value (using_iterator);
return ecma_raise_type_error (ECMA_ERR_MSG ("Cannot convert undefined or null to object"));
}
}
else
{
/* 6.b */
array = ecma_op_create_array_object (NULL, 0, false);
}
/* 6.c */
if (ECMA_IS_VALUE_ERROR (array))
{
ecma_free_value (using_iterator);
return array;
}
ecma_object_t *array_obj_p = ecma_get_object_from_value (array);
/* 6.d */
ecma_value_t iterator = ecma_op_get_iterator (items, using_iterator);
ecma_free_value (using_iterator);
/* 6.e */
if (ECMA_IS_VALUE_ERROR (iterator))
{
ecma_free_value (array);
return iterator;
}
/* 6.f */
uint32_t k = 0;
/* 6.g */
while (true)
{
/* 6.g.ii */
ecma_value_t next = ecma_op_iterator_step (iterator);
/* 6.g.iii */
if (ECMA_IS_VALUE_ERROR (next))
{
goto iterator_cleanup;
}
/* 6.g.iii */
if (ecma_is_value_false (next))
{
/* 6.g.iv.1 */
ecma_value_t len_value = ecma_make_uint32_value (k);
ecma_value_t set_status = ecma_op_object_put (array_obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_LENGTH),
len_value,
true);
ecma_free_value (len_value);
/* 6.g.iv.2 */
if (ECMA_IS_VALUE_ERROR (set_status))
{
goto iterator_cleanup;
}
ecma_free_value (iterator);
/* 6.g.iv.3 */
return array;
}
/* 6.g.v */
ecma_value_t next_value = ecma_op_iterator_value (next);
ecma_free_value (next);
/* 6.g.vi */
if (ECMA_IS_VALUE_ERROR (next_value))
{
goto iterator_cleanup;
}
ecma_value_t mapped_value;
/* 6.g.vii */
if (mapfn_obj_p != NULL)
{
/* 6.g.vii.1 */
ecma_value_t args_p[2] = { next_value, ecma_make_uint32_value (k) };
/* 6.g.vii.3 */
mapped_value = ecma_op_function_call (mapfn_obj_p, call_this_arg, args_p, 2);
ecma_free_value (args_p[1]);
ecma_free_value (next_value);
/* 6.g.vii.2 */
if (ECMA_IS_VALUE_ERROR (mapped_value))
{
ecma_op_iterator_close (iterator);
goto iterator_cleanup;
}
}
else
{
/* 6.g.viii */
mapped_value = next_value;
}
/* 6.g.ix */
const uint32_t flags = ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE | ECMA_IS_THROW;
ecma_value_t set_status = ecma_builtin_helper_def_prop_by_index (array_obj_p, k, mapped_value, flags);
ecma_free_value (mapped_value);
/* 6.g.x */
if (ECMA_IS_VALUE_ERROR (set_status))
{
ecma_op_iterator_close (iterator);
goto iterator_cleanup;
}
/* 6.g.xi */
k++;
}
iterator_cleanup:
ecma_free_value (iterator);
ecma_free_value (array);
return ret_value;
}
/* 8. */
ecma_value_t array_like = ecma_op_to_object (items);
/* 9. */
if (ECMA_IS_VALUE_ERROR (array_like))
{
return array_like;
}
ecma_object_t *array_like_obj_p = ecma_get_object_from_value (array_like);
/* 10. */
uint32_t len;
ecma_value_t len_value = ecma_op_object_get_length (array_like_obj_p, &len);
/* 11. */
if (ECMA_IS_VALUE_ERROR (len_value))
{
goto cleanup;
}
len_value = ecma_make_uint32_value (len);
/* 12. */
ecma_value_t array;
/* 12.a */
if (ecma_is_constructor (constructor))
{
ecma_object_t *constructor_obj_p = ecma_get_object_from_value (constructor);
array = ecma_op_function_construct (constructor_obj_p, ECMA_VALUE_UNDEFINED, &len_value, 1);
if (ecma_is_value_undefined (array) || ecma_is_value_null (array))
{
ecma_free_value (len_value);
ecma_raise_type_error (ECMA_ERR_MSG ("Cannot convert undefined or null to object"));
goto cleanup;
}
}
else
{
/* 13.a */
array = ecma_op_create_array_object (&len_value, 1, true);
}
ecma_free_value (len_value);
/* 14. */
if (ECMA_IS_VALUE_ERROR (array))
{
goto cleanup;
}
ecma_object_t *array_obj_p = ecma_get_object_from_value (array);
/* 15. */
uint32_t k = 0;
/* 16. */
while (k < len)
{
/* 16.b */
ecma_string_t *pk = ecma_new_ecma_string_from_uint32 (k);
ecma_value_t k_value = ecma_op_object_get (array_like_obj_p, pk);
ecma_deref_ecma_string (pk);
/* 16.c */
if (ECMA_IS_VALUE_ERROR (k_value))
{
goto cleanup;
}
ecma_value_t mapped_value;
/* 16.d */
if (mapfn_obj_p != NULL)
{
/* 16.d.i */
ecma_value_t args_p[2] = { k_value, ecma_make_uint32_value (k) };
mapped_value = ecma_op_function_call (mapfn_obj_p, call_this_arg, args_p, 2);
ecma_free_value (args_p[1]);
ecma_free_value (k_value);
/* 16.d.ii */
if (ECMA_IS_VALUE_ERROR (mapped_value))
{
goto cleanup;
}
}
else
{
/* 16.e */
mapped_value = k_value;
}
/* 16.f */
const uint32_t flags = ECMA_PROPERTY_CONFIGURABLE_ENUMERABLE_WRITABLE | ECMA_IS_THROW;
ecma_value_t set_status = ecma_builtin_helper_def_prop_by_index (array_obj_p, k, mapped_value, flags);
ecma_free_value (mapped_value);
/* 16.g */
if (ECMA_IS_VALUE_ERROR (set_status))
{
goto cleanup;
}
/* 16.h */
k++;
}
/* 17. */
len_value = ecma_make_uint32_value (k);
ecma_value_t set_status = ecma_op_object_put (array_obj_p,
ecma_get_magic_string (LIT_MAGIC_STRING_LENGTH),
len_value,
true);
ecma_free_value (len_value);
/* 18. */
if (ECMA_IS_VALUE_ERROR (set_status))
{
goto cleanup;
}
/* 19. */
ret_value = ecma_make_object_value (array_obj_p);
cleanup:
ecma_deref_object (array_like_obj_p);
return ret_value;
} /* ecma_builtin_array_object_from */
#endif /* ENABLED (JERRY_ES2015) */
/**
* Handle calling [[Call]] of built-in Array object
*
@@ -40,6 +40,9 @@ NUMBER_VALUE (LIT_MAGIC_STRING_LENGTH,
/* Routine properties:
* (property name, C routine name, arguments number or NON_FIXED, value of the routine's length property) */
ROUTINE (LIT_MAGIC_STRING_IS_ARRAY_UL, ecma_builtin_array_object_is_array, 1, 1)
#if ENABLED (JERRY_ES2015)
ROUTINE (LIT_MAGIC_STRING_FROM, ecma_builtin_array_object_from, NON_FIXED, 1)
#endif /* ENABLED (JERRY_ES2015) */
#endif /* !(ENABLED (JERRY_BUILTIN_ARRAY)) */
@@ -48,7 +48,7 @@ ROUTINE (LIT_MAGIC_STRING_SET, ecma_builtin_map_prototype_object_set, 2, 2)
ROUTINE (LIT_MAGIC_STRING_ENTRIES, ecma_builtin_map_prototype_object_entries, 0, 0)
ROUTINE (LIT_MAGIC_STRING_VALUES, ecma_builtin_map_prototype_object_values, 0, 0)
ROUTINE (LIT_MAGIC_STRING_KEYS, ecma_builtin_map_prototype_object_keys, 0, 0)
ROUTINE (LIT_GLOBAL_SYMBOL_ITERATOR, ecma_builtin_map_prototype_object_values, 0, 0)
ROUTINE (LIT_GLOBAL_SYMBOL_ITERATOR, ecma_builtin_map_prototype_object_entries, 0, 0)
#endif /* ENABLED (JERRY_ES2015) */
/* ECMA-262 v6, 23.1.3.10 */
-2
View File
@@ -139,8 +139,6 @@ LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_EXEC, "exec")
|| ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FILL, "fill")
LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FIND, "find")
#endif
#if ENABLED (JERRY_ES2015_BUILTIN_TYPEDARRAY)
LIT_MAGIC_STRING_DEF (LIT_MAGIC_STRING_FROM, "from")
#endif
#if ENABLED (JERRY_BUILTIN_ARRAY) \