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LibJS: Update spec numbers/steps for RegExp unicode sets flag proposal

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This proposal has been merged into the main ECMA-262 spec. See:
26b2369
This commit is contained in:
Timothy Flynn 2023-06-23 10:39:08 -04:00 • committed by Andreas Kling
parent 9407e05a3c
commit 32502fceed
2 changed files with 52 additions and 67 deletions
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6
Userland/Libraries/LibJS/Runtime/RegExpObject.cpp
View file

@ -167,8 +167,6 @@ ThrowCompletionOr<void> RegExpObject::initialize(Realm& realm)
// 22.2.3.3 RegExpInitialize ( obj, pattern, flags ), https://tc39.es/ecma262/#sec-regexpinitialize // 22.2.3.3 RegExpInitialize ( obj, pattern, flags ), https://tc39.es/ecma262/#sec-regexpinitialize
ThrowCompletionOr<NonnullGCPtr<RegExpObject>> RegExpObject::regexp_initialize(VM& vm, Value pattern_value, Value flags_value) ThrowCompletionOr<NonnullGCPtr<RegExpObject>> RegExpObject::regexp_initialize(VM& vm, Value pattern_value, Value flags_value)
{ {
// NOTE: This also contains changes adapted from https://arai-a.github.io/ecma262-compare/?pr=2418, which doesn't match the upstream spec anymore.
// 1. If pattern is undefined, let P be the empty String. // 1. If pattern is undefined, let P be the empty String.
// 2. Else, let P be ? ToString(pattern). // 2. Else, let P be ? ToString(pattern).
auto pattern = pattern_value.is_undefined() auto pattern = pattern_value.is_undefined()
@ -181,7 +179,7 @@ ThrowCompletionOr<NonnullGCPtr<RegExpObject>> RegExpObject::regexp_initialize(VM
? DeprecatedString::empty() ? DeprecatedString::empty()
: TRY(flags_value.to_deprecated_string(vm)); : TRY(flags_value.to_deprecated_string(vm));
// 5. If F contains any code unit other than "d", "g", "i", "m", "s", "u", or "y" or if it contains the same code unit more than once, throw a SyntaxError exception. // 5. If F contains any code unit other than "d", "g", "i", "m", "s", "u", "v", or "y", or if F contains any code unit more than once, throw a SyntaxError exception.
// 6. If F contains "i", let i be true; else let i be false. // 6. If F contains "i", let i be true; else let i be false.
// 7. If F contains "m", let m be true; else let m be false. // 7. If F contains "m", let m be true; else let m be false.
// 8. If F contains "s", let s be true; else let s be false. // 8. If F contains "s", let s be true; else let s be false.
@ -197,7 +195,7 @@ ThrowCompletionOr<NonnullGCPtr<RegExpObject>> RegExpObject::regexp_initialize(VM
bool unicode = parsed_flags.has_flag_set(regex::ECMAScriptFlags::Unicode); bool unicode = parsed_flags.has_flag_set(regex::ECMAScriptFlags::Unicode);
bool unicode_sets = parsed_flags.has_flag_set(regex::ECMAScriptFlags::UnicodeSets); bool unicode_sets = parsed_flags.has_flag_set(regex::ECMAScriptFlags::UnicodeSets);
// 11. If u is true, then // 11. If u is true or v is true, then
// a. Let patternText be StringToCodePoints(P). // a. Let patternText be StringToCodePoints(P).
// 12. Else, // 12. Else,
// a. Let patternText be the result of interpreting each of P's 16-bit elements as a Unicode BMP code point. UTF-16 decoding is not applied to the elements. // a. Let patternText be the result of interpreting each of P's 16-bit elements as a Unicode BMP code point. UTF-16 decoding is not applied to the elements.

113
Userland/Libraries/LibJS/Runtime/RegExpPrototype.cpp
View file

@ -193,8 +193,8 @@ static ThrowCompletionOr<Value> regexp_builtin_exec(VM& vm, RegExpObject& regexp
// 8. Let matcher be R.[[RegExpMatcher]]. // 8. Let matcher be R.[[RegExpMatcher]].
// 9. If flags contains "u", let fullUnicode be true; else let fullUnicode be false. // 9. If flags contains "u" or flags contains "v", let fullUnicode be true; else let fullUnicode be false.
bool full_unicode = regex.options().has_flag_set(ECMAScriptFlags::Unicode); bool full_unicode = regex.options().has_flag_set(ECMAScriptFlags::Unicode) || regex.options().has_flag_set(ECMAScriptFlags::UnicodeSets);
RegexResult result; RegexResult result;
@ -252,44 +252,45 @@ static ThrowCompletionOr<Value> regexp_builtin_exec(VM& vm, RegExpObject& regexp
} }
// 17. Let n be the number of elements in r's captures List. (This is the same value as 22.2.2.1's NcapturingParens.) // 17. Let n be the number of elements in r's captures List. (This is the same value as 22.2.2.1's NcapturingParens.)
// 18. Assert: n < 2^32 - 1. // 18. Assert: n = R.[[RegExpRecord]].[[CapturingGroupsCount]].
// 19. Assert: n < 2^32 - 1.
VERIFY(result.n_named_capture_groups < NumericLimits<u32>::max()); VERIFY(result.n_named_capture_groups < NumericLimits<u32>::max());
// 19. Let A be ! ArrayCreate(n + 1). // 20. Let A be ! ArrayCreate(n + 1).
auto array = MUST(Array::create(realm, result.n_named_capture_groups + 1)); auto array = MUST(Array::create(realm, result.n_named_capture_groups + 1));
// 20. Assert: The mathematical value of A's "length" property is n + 1. // 21. Assert: The mathematical value of A's "length" property is n + 1.
// 21. Perform ! CreateDataPropertyOrThrow(A, "index", 𝔽(lastIndex)). // 22. Perform ! CreateDataPropertyOrThrow(A, "index", 𝔽(lastIndex)).
MUST(array->create_data_property_or_throw(vm.names.index, Value(match_index))); MUST(array->create_data_property_or_throw(vm.names.index, Value(match_index)));
// 23. Let match be the Match { [[StartIndex]]: lastIndex, [[EndIndex]]: e }. // 24. Let match be the Match { [[StartIndex]]: lastIndex, [[EndIndex]]: e }.
auto match_indices = Match::create(match); auto match_indices = Match::create(match);
// 24. Let indices be a new empty List. // 25. Let indices be a new empty List.
Vector<Optional<Match>> indices; Vector<Optional<Match>> indices;
Vector<Utf16String> captured_values; Vector<Utf16String> captured_values;
// 25. Let groupNames be a new empty List. // 26. Let groupNames be a new empty List.
HashMap<DeprecatedFlyString, Match> group_names; HashMap<DeprecatedFlyString, Match> group_names;
// 26. Add match as the last element of indices. // 27. Add match as the last element of indices.
indices.append(move(match_indices)); indices.append(move(match_indices));
// 27. Let matchedValue be ! GetMatchString(S, match). // 28. Let matchedValue be ! GetMatchString(S, match).
// 28. Perform ! CreateDataPropertyOrThrow(A, "0", matchedValue). // 29. Perform ! CreateDataPropertyOrThrow(A, "0", matchedValue).
MUST(array->create_data_property_or_throw(0, PrimitiveString::create(vm, TRY(Utf16String::create(vm, match.view.u16_view()))))); MUST(array->create_data_property_or_throw(0, PrimitiveString::create(vm, TRY(Utf16String::create(vm, match.view.u16_view())))));
// 29. If R contains any GroupName, then // 30. If R contains any GroupName, then
// a. Let groups be OrdinaryObjectCreate(null). // a. Let groups be OrdinaryObjectCreate(null).
// b. Let hasGroups be true. // b. Let hasGroups be true.
// 30. Else, // 31. Else,
// a. Let groups be undefined. // a. Let groups be undefined.
// b. Let hasGroups be false. // b. Let hasGroups be false.
bool has_groups = result.n_named_capture_groups != 0; bool has_groups = result.n_named_capture_groups != 0;
auto groups_object = has_groups ? Object::create(realm, nullptr) : GCPtr<Object> {}; auto groups_object = has_groups ? Object::create(realm, nullptr) : GCPtr<Object> {};
// 32. For each integer i such that i ≥ 1 and i ≤ n, in ascending order, do // 33. For each integer i such that i ≥ 1 and i ≤ n, in ascending order, do
for (size_t i = 1; i <= result.n_capture_groups; ++i) { for (size_t i = 1; i <= result.n_capture_groups; ++i) {
// a. Let captureI be ith element of r's captures List. // a. Let captureI be ith element of r's captures List.
auto& capture = result.capture_group_matches[0][i]; auto& capture = result.capture_group_matches[0][i];
@ -362,12 +363,12 @@ static ThrowCompletionOr<Value> regexp_builtin_exec(VM& vm, RegExpObject& regexp
} }
} }
// 31. Perform ! CreateDataPropertyOrThrow(A, "groups", groups). // 32. Perform ! CreateDataPropertyOrThrow(A, "groups", groups).
// NOTE: This step must be performed after the above loop in order for groups to be populated. // NOTE: This step must be performed after the above loop in order for groups to be populated.
Value groups = has_groups ? groups_object : js_undefined(); Value groups = has_groups ? groups_object : js_undefined();
MUST(array->create_data_property_or_throw(vm.names.groups, groups)); MUST(array->create_data_property_or_throw(vm.names.groups, groups));
// 33. If hasIndices is true, then // 34. If hasIndices is true, then
if (has_indices) { if (has_indices) {
// a. Let indicesArray be MakeMatchIndicesIndexPairArray(S, indices, groupNames, hasGroups). // a. Let indicesArray be MakeMatchIndicesIndexPairArray(S, indices, groupNames, hasGroups).
auto indices_array = make_match_indices_index_pair_array(vm, string.view(), indices, group_names, has_groups); auto indices_array = make_match_indices_index_pair_array(vm, string.view(), indices, group_names, has_groups);
@ -375,11 +376,11 @@ static ThrowCompletionOr<Value> regexp_builtin_exec(VM& vm, RegExpObject& regexp
MUST(array->create_data_property(vm.names.indices, indices_array)); MUST(array->create_data_property(vm.names.indices, indices_array));
} }
// 22. Perform ! CreateDataPropertyOrThrow(A, "input", S). // 23. Perform ! CreateDataPropertyOrThrow(A, "input", S).
// NOTE: This step is performed last to allow the string to be moved into the PrimitiveString::create() invocation. // NOTE: This step is performed last to allow the string to be moved into the PrimitiveString::create() invocation.
MUST(array->create_data_property_or_throw(vm.names.input, PrimitiveString::create(vm, move(string)))); MUST(array->create_data_property_or_throw(vm.names.input, PrimitiveString::create(vm, move(string))));
// 34. Return A. // 35. Return A.
return array; return array;
} }
@ -438,7 +439,7 @@ size_t advance_string_index(Utf16View const& string, size_t index, bool unicode)
// 22.2.6.10 get RegExp.prototype.multiline, https://tc39.es/ecma262/#sec-get-regexp.prototype.multiline // 22.2.6.10 get RegExp.prototype.multiline, https://tc39.es/ecma262/#sec-get-regexp.prototype.multiline
// 22.2.6.15 get RegExp.prototype.sticky, https://tc39.es/ecma262/#sec-get-regexp.prototype.sticky // 22.2.6.15 get RegExp.prototype.sticky, https://tc39.es/ecma262/#sec-get-regexp.prototype.sticky
// 22.2.6.18 get RegExp.prototype.unicode, https://tc39.es/ecma262/#sec-get-regexp.prototype.unicode // 22.2.6.18 get RegExp.prototype.unicode, https://tc39.es/ecma262/#sec-get-regexp.prototype.unicode
// 22.2.6.18 get RegExp.prototype.unicodeSets, https://arai-a.github.io/ecma262-compare/?pr=2418&id=sec-get-regexp.prototype.unicodeSets // 22.2.6.19 get RegExp.prototype.unicodeSets, https://tc39.es/ecma262/#sec-get-regexp.prototype.unicodesets
#define __JS_ENUMERATE(flagName, flag_name, flag_char) \ #define __JS_ENUMERATE(flagName, flag_name, flag_char) \
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::flag_name) \ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::flag_name) \
{ \ { \
@ -497,10 +498,10 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::flags)
// 11. If multiline is true, append the code unit 0x006D (LATIN SMALL LETTER M) as the last code unit of result. // 11. If multiline is true, append the code unit 0x006D (LATIN SMALL LETTER M) as the last code unit of result.
// 12. Let dotAll be ToBoolean(? Get(R, "dotAll")). // 12. Let dotAll be ToBoolean(? Get(R, "dotAll")).
// 13. If dotAll is true, append the code unit 0x0073 (LATIN SMALL LETTER S) as the last code unit of result. // 13. If dotAll is true, append the code unit 0x0073 (LATIN SMALL LETTER S) as the last code unit of result.
// 14. Let unicodeSets be ! ToBoolean(? Get(R, "unicodeSets")). // 14. Let unicode be ToBoolean(? Get(R, "unicode")).
// 15. If unicodeSets is true, append the code unit 0x0076 (LATIN SMALL LETTER V) as the last code unit of result. // 15. If unicode is true, append the code unit 0x0075 (LATIN SMALL LETTER U) as the last code unit of result.
// 16. Let unicode be ToBoolean(? Get(R, "unicode")). // 16. Let unicodeSets be ! ToBoolean(? Get(R, "unicodeSets")).
// 17. If unicode is true, append the code unit 0x0075 (LATIN SMALL LETTER U) as the last code unit of result. // 17. If unicodeSets is true, append the code unit 0x0076 (LATIN SMALL LETTER V) as the last code unit of result.
// 18. Let sticky be ToBoolean(? Get(R, "sticky")). // 18. Let sticky be ToBoolean(? Get(R, "sticky")).
// 19. If sticky is true, append the code unit 0x0079 (LATIN SMALL LETTER Y) as the last code unit of result. // 19. If sticky is true, append the code unit 0x0079 (LATIN SMALL LETTER Y) as the last code unit of result.
#define __JS_ENUMERATE(flagName, flag_name, flag_char) \ #define __JS_ENUMERATE(flagName, flag_name, flag_char) \
@ -510,12 +511,11 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::flags)
JS_ENUMERATE_REGEXP_FLAGS JS_ENUMERATE_REGEXP_FLAGS
#undef __JS_ENUMERATE #undef __JS_ENUMERATE
// 18. Return result. // 20. Return result.
return PrimitiveString::create(vm, builder.to_deprecated_string()); return PrimitiveString::create(vm, builder.to_deprecated_string());
} }
// 22.2.6.8 RegExp.prototype [ @@match ] ( string ), https://tc39.es/ecma262/#sec-regexp.prototype-@@match // 22.2.6.8 RegExp.prototype [ @@match ] ( string ), https://tc39.es/ecma262/#sec-regexp.prototype-@@match
// With changes from https://arai-a.github.io/ecma262-compare/?pr=2418&id=sec-regexp.prototype-%40%40match
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match) JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match)
{ {
auto& realm = *vm.current_realm(); auto& realm = *vm.current_realm();
@ -538,9 +538,7 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match)
} }
// 6. Else, // 6. Else,
// a. If flags contains "u", let fullUnicode be true. Otherwise, let fullUnicode be false. // a. If flags contains "u" or flags contains "v", let fullUnicode be true. Otherwise, let fullUnicode be false.
// FIXME: Update spec steps when https://github.com/tc39/ecma262/pull/2418 is rebased on the
// current ECMA-262 main branch. According to the PR, this is how this step will look:
bool full_unicode = flags.contains('u') || flags.contains('v'); bool full_unicode = flags.contains('u') || flags.contains('v');
// b. Perform ? Set(rx, "lastIndex", +0𝔽, true). // b. Perform ? Set(rx, "lastIndex", +0𝔽, true).
@ -591,7 +589,6 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match)
} }
// 22.2.6.9 RegExp.prototype [ @@matchAll ] ( string ), https://tc39.es/ecma262/#sec-regexp-prototype-matchall // 22.2.6.9 RegExp.prototype [ @@matchAll ] ( string ), https://tc39.es/ecma262/#sec-regexp-prototype-matchall
// With changes from https://arai-a.github.io/ecma262-compare/?pr=2418&id=sec-regexp-prototype-matchall
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match_all) JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match_all)
{ {
auto& realm = *vm.current_realm(); auto& realm = *vm.current_realm();
@ -635,7 +632,6 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_match_all)
} }
// 22.2.6.11 RegExp.prototype [ @@replace ] ( string, replaceValue ), https://tc39.es/ecma262/#sec-regexp.prototype-@@replace // 22.2.6.11 RegExp.prototype [ @@replace ] ( string, replaceValue ), https://tc39.es/ecma262/#sec-regexp.prototype-@@replace
// With changes from https://arai-a.github.io/ecma262-compare/?pr=2418&id=sec-regexp.prototype-%40%40replace
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace) JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
{ {
auto string_value = vm.argument(0); auto string_value = vm.argument(0);
@ -664,24 +660,18 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
// 8. If flags contains "g", let global be true. Otherwise, let global be false. // 8. If flags contains "g", let global be true. Otherwise, let global be false.
bool global = flags.contains('g'); bool global = flags.contains('g');
bool full_unicode = false;
// 8. If global is true, then // 9. If global is true, then
if (global) { if (global) {
// a. If flags contains "u", let fullUnicode be true. Otherwise, let fullUnicode be false. // a. Perform ? Set(rx, "lastIndex", +0𝔽, true).
// FIXME: Update spec steps when https://github.com/tc39/ecma262/pull/2418 is rebased on the
// current ECMA-262 main branch. According to the PR, this is how this step will look:
full_unicode = flags.contains('u') || flags.contains('v');
// b. Perform ? Set(rx, "lastIndex", +0𝔽, true).
TRY(regexp_object->set(vm.names.lastIndex, Value(0), Object::ShouldThrowExceptions::Yes)); TRY(regexp_object->set(vm.names.lastIndex, Value(0), Object::ShouldThrowExceptions::Yes));
} }
// 9. Let results be a new empty List. // 10. Let results be a new empty List.
MarkedVector<Object*> results(vm.heap()); MarkedVector<Object*> results(vm.heap());
// 10. Let done be false. // 11. Let done be false.
// 11. Repeat, while done is false, // 12. Repeat, while done is false,
while (true) { while (true) {
// a. Let result be ? RegExpExec(rx, S). // a. Let result be ? RegExpExec(rx, S).
auto result = TRY(regexp_exec(vm, regexp_object, string)); auto result = TRY(regexp_exec(vm, regexp_object, string));
@ -707,18 +697,21 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
// 2. If matchStr is the empty String, then // 2. If matchStr is the empty String, then
if (match_str.is_empty()) { if (match_str.is_empty()) {
// Steps 2a-2c are implemented by increment_last_index. // b. If flags contains "u" or flags contains "v", let fullUnicode be true. Otherwise, let fullUnicode be false.
bool full_unicode = flags.contains('u') || flags.contains('v');
// Steps 2a, 2c-2d are implemented by increment_last_index.
TRY(increment_last_index(vm, regexp_object, string.view(), full_unicode)); TRY(increment_last_index(vm, regexp_object, string.view(), full_unicode));
} }
} }
// 12. Let accumulatedResult be the empty String. // 13. Let accumulatedResult be the empty String.
StringBuilder accumulated_result; StringBuilder accumulated_result;
// 13. Let nextSourcePosition be 0. // 14. Let nextSourcePosition be 0.
size_t next_source_position = 0; size_t next_source_position = 0;
// 14. For each element result of results, do // 15. For each element result of results, do
for (auto& result : results) { for (auto& result : results) {
// a. Let resultLength be ? LengthOfArrayLike(result). // a. Let resultLength be ? LengthOfArrayLike(result).
size_t result_length = TRY(length_of_array_like(vm, *result)); size_t result_length = TRY(length_of_array_like(vm, *result));
@ -740,11 +733,10 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
// f. Set position to the result of clamping position between 0 and lengthS. // f. Set position to the result of clamping position between 0 and lengthS.
position = clamp(position, static_cast<double>(0), static_cast<double>(string.length_in_code_units())); position = clamp(position, static_cast<double>(0), static_cast<double>(string.length_in_code_units()));
// g. Let n be 1. // g. Let captures be a new empty List.
// h. Let captures be a new empty List.
MarkedVector<Value> captures(vm.heap()); MarkedVector<Value> captures(vm.heap());
// h. Let n be 1.
// i. Repeat, while n ≤ nCaptures, // i. Repeat, while n ≤ nCaptures,
for (size_t n = 1; n <= n_captures; ++n) { for (size_t n = 1; n <= n_captures; ++n) {
// i. Let capN be ? Get(result, ! ToString(𝔽(n))). // i. Let capN be ? Get(result, ! ToString(𝔽(n))).
@ -770,27 +762,23 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
// k. If functionalReplace is true, then // k. If functionalReplace is true, then
if (replace_value.is_function()) { if (replace_value.is_function()) {
// i. Let replacerArgs be « matched ». // i. Let replacerArgs be the list-concatenation of « matched », captures, and « 𝔽(position), S ».
MarkedVector<Value> replacer_args(vm.heap()); MarkedVector<Value> replacer_args(vm.heap());
replacer_args.append(PrimitiveString::create(vm, move(matched))); replacer_args.append(PrimitiveString::create(vm, move(matched)));
// ii. Append in List order the elements of captures to the end of the List replacerArgs.
replacer_args.extend(move(captures)); replacer_args.extend(move(captures));
// iii. Append 𝔽(position) and S to replacerArgs.
replacer_args.append(Value(position)); replacer_args.append(Value(position));
replacer_args.append(PrimitiveString::create(vm, string)); replacer_args.append(PrimitiveString::create(vm, string));
// iv. If namedCaptures is not undefined, then // ii. If namedCaptures is not undefined, then
if (!named_captures.is_undefined()) { if (!named_captures.is_undefined()) {
// 1. Append namedCaptures as the last element of replacerArgs. // 1. Append namedCaptures as the last element of replacerArgs.
replacer_args.append(move(named_captures)); replacer_args.append(move(named_captures));
} }
// v. Let replValue be ? Call(replaceValue, undefined, replacerArgs). // iii. Let replValue be ? Call(replaceValue, undefined, replacerArgs).
auto replace_result = TRY(call(vm, replace_value.as_function(), js_undefined(), move(replacer_args))); auto replace_result = TRY(call(vm, replace_value.as_function(), js_undefined(), move(replacer_args)));
// vi. Let replacement be ? ToString(replValue). // iv. Let replacement be ? ToString(replValue).
replacement = TRY(replace_result.to_string(vm)); replacement = TRY(replace_result.to_string(vm));
} }
// l. Else, // l. Else,
@ -819,11 +807,11 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_replace)
} }
} }
// 15. If nextSourcePosition ≥ lengthS, return accumulatedResult. // 16. If nextSourcePosition ≥ lengthS, return accumulatedResult.
if (next_source_position >= string.length_in_code_units()) if (next_source_position >= string.length_in_code_units())
return PrimitiveString::create(vm, accumulated_result.to_deprecated_string()); return PrimitiveString::create(vm, accumulated_result.to_deprecated_string());
// 16. Return the string-concatenation of accumulatedResult and the substring of S from nextSourcePosition. // 17. Return the string-concatenation of accumulatedResult and the substring of S from nextSourcePosition.
auto substring = string.substring_view(next_source_position); auto substring = string.substring_view(next_source_position);
accumulated_result.append(substring); accumulated_result.append(substring);
@ -896,7 +884,6 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::source)
} }
// 22.2.6.14 RegExp.prototype [ @@split ] ( string, limit ), https://tc39.es/ecma262/#sec-regexp.prototype-@@split // 22.2.6.14 RegExp.prototype [ @@split ] ( string, limit ), https://tc39.es/ecma262/#sec-regexp.prototype-@@split
// With changes from https://arai-a.github.io/ecma262-compare/?pr=2418&id=sec-regexp.prototype-%40%40split
JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_split) JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_split)
{ {
auto& realm = *vm.current_realm(); auto& realm = *vm.current_realm();
@ -941,8 +928,7 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_split)
if (limit == 0) if (limit == 0)
return array; return array;
// 15. Let size be the length of S. // 15. If S is the empty String, then
// 16. If size is 0, then
if (string.is_empty()) { if (string.is_empty()) {
// a. Let z be ? RegExpExec(splitter, S). // a. Let z be ? RegExpExec(splitter, S).
auto result = TRY(regexp_exec(vm, splitter, string)); auto result = TRY(regexp_exec(vm, splitter, string));
@ -958,6 +944,8 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_split)
return array; return array;
} }
// 16. Let size be the length of S.
// 17. Let p be 0. // 17. Let p be 0.
size_t last_match_end = 0; size_t last_match_end = 0;
@ -1021,7 +1009,6 @@ JS_DEFINE_NATIVE_FUNCTION(RegExpPrototype::symbol_split)
// 8. Let i be 1. // 8. Let i be 1.
// 9. Repeat, while i ≤ numberOfCaptures, // 9. Repeat, while i ≤ numberOfCaptures,
for (size_t i = 1; i <= number_of_captures; ++i) { for (size_t i = 1; i <= number_of_captures; ++i) {
// a. Let nextCapture be ? Get(z, ! ToString(𝔽(i))). // a. Let nextCapture be ? Get(z, ! ToString(𝔽(i))).
auto next_capture = TRY(result.get(vm, i)); auto next_capture = TRY(result.get(vm, i));