LibJS: Update spec numbers for the Intl NumberFormat v3 proposal

This proposal has been merged into the main ECMA-402 spec. See:
https://github.com/tc39/ecma402/commit/4257160

Note this includes some editorial and normative changes made when the
proposal was merged into the main spec, but are not in the proposal spec
itself. In particular, the following AOs were changed:

    PartitionNumberRangePattern (normative)
    SetNumberFormatDigitOptions (editorial)

Userland/Libraries/LibJS/Runtime/Intl/AbstractOperations.cpp

@@ -264,7 +264,6 @@ ThrowCompletionOr<Vector<String>> canonicalize_locale_list(VM& vm, Value locales
 }
 
 // 9.2.2 BestAvailableLocale ( availableLocales, locale ), https://tc39.es/ecma402/#sec-bestavailablelocale
-// 1.2.2 BestAvailableLocale ( availableLocales, locale ), https://tc39.es/proposal-intl-numberformat-v3/out/negotiation/proposed.html#sec-bestavailablelocale
 Optional<StringView> best_available_locale(StringView locale)
 {
     // 1. Let candidate be locale.
@@ -608,7 +607,7 @@ ThrowCompletionOr<Object*> coerce_options_to_object(VM& vm, Value options)
 
 // NOTE: 9.2.13 GetOption has been removed and is being pulled in from ECMA-262 in the Temporal proposal.
 
-// 1.2.14 GetBooleanOrStringNumberFormatOption ( options, property, stringValues, fallback ), https://tc39.es/proposal-intl-numberformat-v3/out/negotiation/proposed.html#sec-getbooleanorstringnumberformatoption
+// 9.2.14 GetBooleanOrStringNumberFormatOption ( options, property, stringValues, fallback ), https://tc39.es/ecma402/#sec-getbooleanorstringnumberformatoption
 ThrowCompletionOr<StringOrBoolean> get_boolean_or_string_number_format_option(VM& vm, Object const& options, PropertyKey const& property, ReadonlySpan<StringView> string_values, StringOrBoolean fallback)
 {
     // 1. Let value be ? Get(options, property).
@@ -638,7 +637,7 @@ ThrowCompletionOr<StringOrBoolean> get_boolean_or_string_number_format_option(VM
     return StringOrBoolean { *it };
 }
 
-// 9.2.14 DefaultNumberOption ( value, minimum, maximum, fallback ), https://tc39.es/ecma402/#sec-defaultnumberoption
+// 9.2.15 DefaultNumberOption ( value, minimum, maximum, fallback ), https://tc39.es/ecma402/#sec-defaultnumberoption
 ThrowCompletionOr<Optional<int>> default_number_option(VM& vm, Value value, int minimum, int maximum, Optional<int> fallback)
 {
     // 1. If value is undefined, return fallback.
@@ -656,7 +655,7 @@ ThrowCompletionOr<Optional<int>> default_number_option(VM& vm, Value value, int
     return floor(value.as_double());
 }
 
-// 9.2.15 GetNumberOption ( options, property, minimum, maximum, fallback ), https://tc39.es/ecma402/#sec-getnumberoption
+// 9.2.16 GetNumberOption ( options, property, minimum, maximum, fallback ), https://tc39.es/ecma402/#sec-getnumberoption
 ThrowCompletionOr<Optional<int>> get_number_option(VM& vm, Object const& options, PropertyKey const& property, int minimum, int maximum, Optional<int> fallback)
 {
     // 1. Assert: Type(options) is Object.
@@ -668,7 +667,7 @@ ThrowCompletionOr<Optional<int>> get_number_option(VM& vm, Object const& options
     return default_number_option(vm, value, minimum, maximum, move(fallback));
 }
 
-// 9.2.16 PartitionPattern ( pattern ), https://tc39.es/ecma402/#sec-partitionpattern
+// 9.2.17 PartitionPattern ( pattern ), https://tc39.es/ecma402/#sec-partitionpattern
 ThrowCompletionOr<Vector<PatternPartition>> partition_pattern(VM& vm, StringView pattern)
 {
     // 1. Let result be a new empty List.

Userland/Libraries/LibJS/Runtime/Intl/MathematicalValue.h

@@ -15,7 +15,7 @@
 
 namespace JS::Intl {
 
-// https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#intl-mathematical-value
+// https://tc39.es/ecma402/#intl-mathematical-value
 class MathematicalValue {
 public:
     enum class Symbol {

Userland/Libraries/LibJS/Runtime/Intl/NumberFormat.cpp

@@ -377,7 +377,6 @@ int currency_digits(StringView currency)
 }
 
 // 15.5.3 FormatNumericToString ( intlObject, x ), https://tc39.es/ecma402/#sec-formatnumberstring
-// 1.5.3 FormatNumericToString ( intlObject, x ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-formatnumberstring
 ThrowCompletionOr<FormatResult> format_numeric_to_string(VM& vm, NumberFormatBase const& intl_object, MathematicalValue number)
 {
     bool is_negative = false;
@@ -514,7 +513,6 @@ ThrowCompletionOr<FormatResult> format_numeric_to_string(VM& vm, NumberFormatBas
 }
 
 // 15.5.4 PartitionNumberPattern ( numberFormat, x ), https://tc39.es/ecma402/#sec-partitionnumberpattern
-// 1.5.4 PartitionNumberPattern ( numberFormat, x ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-partitionnumberpattern
 ThrowCompletionOr<Vector<PatternPartition>> partition_number_pattern(VM& vm, NumberFormat& number_format, MathematicalValue number)
 {
     // 1. Let exponent be 0.
@@ -727,7 +725,6 @@ static ThrowCompletionOr<Vector<String>> separate_integer_into_groups(VM& vm, ::
 }
 
 // 15.5.5 PartitionNotationSubPattern ( numberFormat, x, n, exponent ), https://tc39.es/ecma402/#sec-partitionnotationsubpattern
-// 1.5.5 PartitionNotationSubPattern ( numberFormat, x, n, exponent ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-partitionnotationsubpattern
 ThrowCompletionOr<Vector<PatternPartition>> partition_notation_sub_pattern(VM& vm, NumberFormat& number_format, MathematicalValue const& number, String formatted_string, int exponent)
 {
     // 1. Let result be a new empty List.
@@ -769,8 +766,8 @@ ThrowCompletionOr<Vector<PatternPartition>> partition_notation_sub_pattern(VM& v
             }
             // iii. Else if p is equal to "number", then
             else if (part == "number"sv) {
-                // 1. If the numberFormat.[[NumberingSystem]] matches one of the values in the "Numbering System" column of Table 12 below, then
-                //     a. Let digits be a List whose elements are the code points specified in the "Digits" column of the matching row in Table 13.
+                // 1. If the numberFormat.[[NumberingSystem]] matches one of the values in the "Numbering System" column of Table 14 below, then
+                //     a. Let digits be a List whose elements are the code points specified in the "Digits" column of the matching row in Table 14.
                 //     b. Assert: The length of digits is 10.
                 //     c. Let transliterated be the empty String.
                 //     d. Let len be the length of n.
@@ -999,7 +996,7 @@ struct RawPrecisionResult {
     MathematicalValue rounded;
 };
 
-// ToRawPrecisionFn, https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#eqn-ToRawPrecisionFn
+// ToRawPrecisionFn, https://tc39.es/ecma402/#eqn-ToRawPrecisionFn
 static ThrowCompletionOr<RawPrecisionResult> to_raw_precision_function(VM& vm, MathematicalValue const& number, int precision, PreferredResult mode)
 {
     RawPrecisionResult result {};
@@ -1036,7 +1033,6 @@ static ThrowCompletionOr<RawPrecisionResult> to_raw_precision_function(VM& vm, M
 }
 
 // 15.5.8 ToRawPrecision ( x, minPrecision, maxPrecision ), https://tc39.es/ecma402/#sec-torawprecision
-// 1.5.8 ToRawPrecision ( x, minPrecision, maxPrecision, unsignedRoundingMode ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-torawprecision
 ThrowCompletionOr<RawFormatResult> to_raw_precision(VM& vm, MathematicalValue const& number, int min_precision, int max_precision, NumberFormat::UnsignedRoundingMode unsigned_rounding_mode)
 {
     RawFormatResult result {};
@@ -1153,7 +1149,7 @@ struct RawFixedResult {
     MathematicalValue rounded;
 };
 
-// ToRawFixedFn, https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#eqn-ToRawFixedFn
+// ToRawFixedFn, https://tc39.es/ecma402/#eqn-ToRawFixedFn
 static ThrowCompletionOr<RawFixedResult> to_raw_fixed_function(VM& vm, MathematicalValue const& number, int fraction, int rounding_increment, PreferredResult mode)
 {
     RawFixedResult result {};
@@ -1200,7 +1196,6 @@ static ThrowCompletionOr<RawFixedResult> to_raw_fixed_function(VM& vm, Mathemati
 }
 
 // 15.5.9 ToRawFixed ( x, minInteger, minFraction, maxFraction ), https://tc39.es/ecma402/#sec-torawfixed
-// 1.5.9 ToRawFixed ( x, minFraction, maxFraction, roundingIncrement, unsignedRoundingMode ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-torawfixed
 ThrowCompletionOr<RawFormatResult> to_raw_fixed(VM& vm, MathematicalValue const& number, int min_fraction, int max_fraction, int rounding_increment, NumberFormat::UnsignedRoundingMode unsigned_rounding_mode)
 {
     RawFormatResult result {};
@@ -1292,7 +1287,6 @@ enum class NumberCategory {
 };
 
 // 15.5.11 GetNumberFormatPattern ( numberFormat, x ), https://tc39.es/ecma402/#sec-getnumberformatpattern
-// 1.5.11 GetNumberFormatPattern ( numberFormat, x ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-getnumberformatpattern
 ThrowCompletionOr<Optional<Variant<StringView, String>>> get_number_format_pattern(VM& vm, NumberFormat& number_format, MathematicalValue const& number, ::Locale::NumberFormat& found_pattern)
 {
     // 1. Let localeData be %NumberFormat%.[[LocaleData]].
@@ -1655,10 +1649,9 @@ ThrowCompletionOr<int> compute_exponent_for_magnitude(VM& vm, NumberFormat& numb
     }
 }
 
-// 1.5.16 ToIntlMathematicalValue ( value ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-tointlmathematicalvalue
+// 15.5.16 ToIntlMathematicalValue ( value ), https://tc39.es/ecma402/#sec-tointlmathematicalvalue
 ThrowCompletionOr<MathematicalValue> to_intl_mathematical_value(VM& vm, Value value)
 {
-
     // 1. Let primValue be ? ToPrimitive(value, number).
     auto primitive_value = TRY(value.to_primitive(vm, Value::PreferredType::Number));
 
@@ -1700,13 +1693,13 @@ ThrowCompletionOr<MathematicalValue> to_intl_mathematical_value(VM& vm, Value va
     return mathematical_value;
 }
 
-// 1.5.17 GetUnsignedRoundingMode ( roundingMode, isNegative ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-getunsignedroundingmode
+// 15.5.17 GetUnsignedRoundingMode ( roundingMode, isNegative ), https://tc39.es/ecma402/#sec-getunsignedroundingmode
 NumberFormat::UnsignedRoundingMode get_unsigned_rounding_mode(NumberFormat::RoundingMode rounding_mode, bool is_negative)
 {
-    // 1. If isNegative is true, return the specification type in the third column of Table 2 where the first column is roundingMode and the second column is "negative".
-    // 2. Else, return the specification type in the third column of Table 2 where the first column is roundingMode and the second column is "positive".
+    // 1. If isNegative is true, return the specification type in the third column of Table 15 where the first column is roundingMode and the second column is "negative".
+    // 2. Else, return the specification type in the third column of Table 15 where the first column is roundingMode and the second column is "positive".
 
-    // Table 2: Conversion from rounding mode to unsigned rounding mode, https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#table-intl-unsigned-rounding-modes
+    // Table 15: Conversion from rounding mode to unsigned rounding mode, https://tc39.es/ecma402/#table-intl-unsigned-rounding-modes
     switch (rounding_mode) {
     case NumberFormat::RoundingMode::Ceil:
         return is_negative ? NumberFormat::UnsignedRoundingMode::Zero : NumberFormat::UnsignedRoundingMode::Infinity;
@@ -1731,7 +1724,7 @@ NumberFormat::UnsignedRoundingMode get_unsigned_rounding_mode(NumberFormat::Roun
     };
 }
 
-// 1.5.18 ApplyUnsignedRoundingMode ( x, r1, r2, unsignedRoundingMode ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-applyunsignedroundingmode
+// 15.5.18 ApplyUnsignedRoundingMode ( x, r1, r2, unsignedRoundingMode ), https://tc39.es/ecma402/#sec-applyunsignedroundingmode
 RoundingDecision apply_unsigned_rounding_mode(MathematicalValue const& x, MathematicalValue const& r1, MathematicalValue const& r2, NumberFormat::UnsignedRoundingMode unsigned_rounding_mode)
 {
     // 1. If x is equal to r1, return r1.
@@ -1743,7 +1736,7 @@ RoundingDecision apply_unsigned_rounding_mode(MathematicalValue const& x, Mathem
     //
     //        This should be resolved when the "Intl mathematical value" is implemented to support
     //        arbitrarily precise decimals.
-    //        https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#intl-mathematical-value
+    //        https://tc39.es/ecma402/#intl-mathematical-value
     // 2. Assert: r1 < x < r2.
 
     // 3. Assert: unsignedRoundingMode is not undefined.
@@ -1795,7 +1788,7 @@ RoundingDecision apply_unsigned_rounding_mode(MathematicalValue const& x, Mathem
     return RoundingDecision::HigherValue;
 }
 
-// 1.5.19 PartitionNumberRangePattern ( numberFormat, x, y ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-partitionnumberrangepattern
+// 15.5.19 PartitionNumberRangePattern ( numberFormat, x, y ), https://tc39.es/ecma402/#sec-partitionnumberrangepattern
 ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_number_range_pattern(VM& vm, NumberFormat& number_format, MathematicalValue start, MathematicalValue end)
 {
     // 1. If x is NaN or y is NaN, throw a RangeError exception.
@@ -1815,8 +1808,11 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_number_range_pat
     auto raw_end_result = TRY(partition_number_pattern(vm, number_format, move(end)));
     auto end_result = MUST_OR_THROW_OOM(PatternPartitionWithSource::create_from_parent_list(vm, move(raw_end_result)));
 
-    // 5. If xResult is equal to yResult, then
-    if (start_result == end_result) {
+    // 5. If ! FormatNumeric(numberFormat, x) is equal to ! FormatNumeric(numberFormat, y), then
+    auto formatted_start = MUST_OR_THROW_OOM(format_numeric(vm, number_format, start));
+    auto formatted_end = MUST_OR_THROW_OOM(format_numeric(vm, number_format, end));
+
+    if (formatted_start == formatted_end) {
         // a. Let appxResult be ? FormatApproximately(numberFormat, xResult).
         auto approximate_result = TRY(format_approximately(vm, number_format, move(start_result)));
 
@@ -1830,20 +1826,24 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_number_range_pat
         return approximate_result;
     }
 
-    // 6. For each r in xResult, do
-    for (auto& part : start_result) {
-        // i. Set r.[[Source]] to "startRange".
+    // 6. For each element r in xResult, do
+    TRY_OR_THROW_OOM(vm, result.try_ensure_capacity(start_result.size()));
+
+    for (auto& start_part : start_result) {
+        // a. Append a new Record { [[Type]]: r.[[Type]], [[Value]]: r.[[Value]], [[Source]]: "startRange" } as the last element of result.
+        PatternPartitionWithSource part;
+        part.type = start_part.type;
+        part.value = move(start_part.value);
         part.source = "startRange"sv;
-    }
 
-    // 7. Add all elements in xResult to result in order.
-    result = move(start_result);
+        result.unchecked_append(move(part));
+    }
 
-    // 8. Let rangeSeparator be an ILND String value used to separate two numbers.
+    // 7. Let rangeSeparator be an ILND String value used to separate two numbers.
     auto range_separator_symbol = TRY_OR_THROW_OOM(vm, ::Locale::get_number_system_symbol(number_format.data_locale(), number_format.numbering_system(), ::Locale::NumericSymbol::RangeSeparator)).value_or("-"sv);
     auto range_separator = TRY_OR_THROW_OOM(vm, ::Locale::augment_range_pattern(range_separator_symbol, result.last().value, end_result[0].value));
 
-    // 9. Append a new Record { [[Type]]: "literal", [[Value]]: rangeSeparator, [[Source]]: "shared" } element to result.
+    // 8. Append a new Record { [[Type]]: "literal", [[Value]]: rangeSeparator, [[Source]]: "shared" } element to result.
     PatternPartitionWithSource part;
     part.type = "literal"sv;
     part.value = range_separator.has_value()
@@ -1852,27 +1852,30 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> partition_number_range_pat
     part.source = "shared"sv;
     TRY_OR_THROW_OOM(vm, result.try_append(move(part)));
 
-    // 10. For each r in yResult, do
-    for (auto& part : end_result) {
-        // a. Set r.[[Source]] to "endRange".
+    // 9. For each element r in yResult, do
+    TRY_OR_THROW_OOM(vm, result.try_ensure_capacity(result.size() + end_result.size()));
+
+    for (auto& end_part : end_result) {
+        // a. Append a new Record { [[Type]]: r.[[Type]], [[Value]]: r.[[Value]], [[Source]]: "endRange" } as the last element of result.
+        PatternPartitionWithSource part;
+        part.type = end_part.type;
+        part.value = move(end_part.value);
         part.source = "endRange"sv;
-    }
 
-    // 11. Add all elements in yResult to result in order.
-    TRY_OR_THROW_OOM(vm, result.try_extend(move(end_result)));
+        result.unchecked_append(move(part));
+    }
 
-    // 12. Return ! CollapseNumberRange(result).
+    // 10. Return ! CollapseNumberRange(result).
     return collapse_number_range(move(result));
 }
 
-// 1.5.20 FormatApproximately ( numberFormat, result ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-formatapproximately
+// 15.5.20 FormatApproximately ( numberFormat, result ), https://tc39.es/ecma402/#sec-formatapproximately
 ThrowCompletionOr<Vector<PatternPartitionWithSource>> format_approximately(VM& vm, NumberFormat& number_format, Vector<PatternPartitionWithSource> result)
 {
-    // 1. Let i be an index into result, determined by an implementation-defined algorithm based on numberFormat and result.
-    // 2. Let approximatelySign be an ILND String value used to signify that a number is approximate.
+    // 1. Let approximatelySign be an ILND String value used to signify that a number is approximate.
     auto approximately_sign = TRY_OR_THROW_OOM(vm, ::Locale::get_number_system_symbol(number_format.data_locale(), number_format.numbering_system(), ::Locale::NumericSymbol::ApproximatelySign));
 
-    // 3. If approximatelySign is not empty, insert a new Record { [[Type]]: "approximatelySign", [[Value]]: approximatelySign } at index i in result.
+    // 2. If approximatelySign is not empty, insert a new Record { [[Type]]: "approximatelySign", [[Value]]: approximatelySign } at an ILND index in result. For example, if numberFormat has [[Locale]] "en-US" and [[NumberingSystem]] "latn" and [[Style]] "decimal", the new Record might be inserted before the first element of result.
     if (approximately_sign.has_value() && !approximately_sign->is_empty()) {
         PatternPartitionWithSource partition;
         partition.type = "approximatelySign"sv;
@@ -1883,18 +1886,18 @@ ThrowCompletionOr<Vector<PatternPartitionWithSource>> format_approximately(VM& v
         }));
     }
 
-    // 4. Return result.
+    // 3. Return result.
     return result;
 }
 
-// 1.5.21 CollapseNumberRange ( result ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-collapsenumberrange
+// 15.5.21 CollapseNumberRange ( result ), https://tc39.es/ecma402/#sec-collapsenumberrange
 Vector<PatternPartitionWithSource> collapse_number_range(Vector<PatternPartitionWithSource> result)
 {
     // Returning result unmodified is guaranteed to be a correct implementation of CollapseNumberRange.
     return result;
 }
 
-// 1.5.22 FormatNumericRange( numberFormat, x, y ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-formatnumericrange
+// 15.5.22 FormatNumericRange ( numberFormat, x, y ), https://tc39.es/ecma402/#sec-formatnumericrange
 ThrowCompletionOr<String> format_numeric_range(VM& vm, NumberFormat& number_format, MathematicalValue start, MathematicalValue end)
 {
     // 1. Let parts be ? PartitionNumberRangePattern(numberFormat, x, y).
@@ -1913,7 +1916,7 @@ ThrowCompletionOr<String> format_numeric_range(VM& vm, NumberFormat& number_form
     return result.to_string();
 }
 
-// 1.5.23 FormatNumericRangeToParts( numberFormat, x, y ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-formatnumericrangetoparts
+// 15.5.23 FormatNumericRangeToParts ( numberFormat, x, y ), https://tc39.es/ecma402/#sec-formatnumericrangetoparts
 ThrowCompletionOr<Array*> format_numeric_range_to_parts(VM& vm, NumberFormat& number_format, MathematicalValue start, MathematicalValue end)
 {
     auto& realm = *vm.current_realm();

Userland/Libraries/LibJS/Runtime/Intl/NumberFormatConstructor.cpp

@@ -81,7 +81,6 @@ JS_DEFINE_NATIVE_FUNCTION(NumberFormatConstructor::supported_locales_of)
 }
 
 // 15.1.2 InitializeNumberFormat ( numberFormat, locales, options ), https://tc39.es/ecma402/#sec-initializenumberformat
-// 1.1.2 InitializeNumberFormat ( numberFormat, locales, options ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-initializenumberformat
 ThrowCompletionOr<NumberFormat*> initialize_number_format(VM& vm, NumberFormat& number_format, Value locales_value, Value options_value)
 {
     // 1. Let requestedLocales be ? CanonicalizeLocaleList(locales).
@@ -215,7 +214,6 @@ ThrowCompletionOr<NumberFormat*> initialize_number_format(VM& vm, NumberFormat&
 }
 
 // 15.1.3 SetNumberFormatDigitOptions ( intlObj, options, mnfdDefault, mxfdDefault, notation ), https://tc39.es/ecma402/#sec-setnfdigitoptions
-// 1.1.1 SetNumberFormatDigitOptions ( intlObj, options, mnfdDefault, mxfdDefault, notation ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-setnfdigitoptions
 ThrowCompletionOr<void> set_number_format_digit_options(VM& vm, NumberFormatBase& intl_object, Object const& options, int default_min_fraction_digits, int default_max_fraction_digits, NumberFormat::Notation notation)
 {
     // 1. Let mnid be ? GetNumberOption(options, "minimumIntegerDigits,", 1, 21, 1).
@@ -237,7 +235,8 @@ ThrowCompletionOr<void> set_number_format_digit_options(VM& vm, NumberFormatBase
     intl_object.set_min_integer_digits(*min_integer_digits);
 
     // 7. Let roundingPriority be ? GetOption(options, "roundingPriority", string, « "auto", "morePrecision", "lessPrecision" », "auto").
-    auto rounding_priority = TRY(get_option(vm, options, vm.names.roundingPriority, OptionType::String, { "auto"sv, "morePrecision"sv, "lessPrecision"sv }, "auto"sv));
+    auto rounding_priority_option = TRY(get_option(vm, options, vm.names.roundingPriority, OptionType::String, { "auto"sv, "morePrecision"sv, "lessPrecision"sv }, "auto"sv));
+    auto rounding_priority = MUST_OR_THROW_OOM(rounding_priority_option.as_string().utf8_string_view());
 
     // 8. Let roundingIncrement be ? GetNumberOption(options, "roundingIncrement", 1, 5000, 1).
     auto rounding_increment = TRY(get_number_option(vm, options, vm.names.roundingIncrement, 1, 5000, 1));
@@ -288,7 +287,7 @@ ThrowCompletionOr<void> set_number_format_digit_options(VM& vm, NumberFormatBase
     bool need_fraction_digits = true;
 
     // 23. If roundingPriority is "auto", then
-    if (TRY(rounding_priority.as_string().utf8_string_view()) == "auto"sv) {
+    if (rounding_priority == "auto"sv) {
         // a. Set needSd to hasSd.
         need_significant_digits = has_significant_digits;
 
@@ -303,16 +302,12 @@ ThrowCompletionOr<void> set_number_format_digit_options(VM& vm, NumberFormatBase
     if (need_significant_digits) {
         // a. If hasSd is true, then
         if (has_significant_digits) {
-            // i. Set mnsd to ? DefaultNumberOption(mnsd, 1, 21, 1).
+            // i. Set intlObj.[[MinimumSignificantDigits]] to ? DefaultNumberOption(mnsd, 1, 21, 1).
             auto min_digits = TRY(default_number_option(vm, min_significant_digits, 1, 21, 1));
-
-            // ii. Set mxsd to ? DefaultNumberOption(mxsd, mnsd, 21, 21).
-            auto max_digits = TRY(default_number_option(vm, max_significant_digits, *min_digits, 21, 21));
-
-            // iii. Set intlObj.[[MinimumSignificantDigits]] to mnsd.
             intl_object.set_min_significant_digits(*min_digits);
 
-            // iv. Set intlObj.[[MaximumSignificantDigits]] to mxsd.
+            // ii. Set intlObj.[[MaximumSignificantDigits]] to ? DefaultNumberOption(mxsd, intlObj.[[MinimumSignificantDigits]], 21, 21).
+            auto max_digits = TRY(default_number_option(vm, max_significant_digits, *min_digits, 21, 21));
             intl_object.set_max_significant_digits(*max_digits);
         }
         // b. Else,
@@ -361,51 +356,46 @@ ThrowCompletionOr<void> set_number_format_digit_options(VM& vm, NumberFormatBase
         }
     }
 
-    // 26. If needSd is true or needFd is true, then
-    if (need_significant_digits || need_fraction_digits) {
-        auto rounding_priority_string = TRY(rounding_priority.as_string().utf8_string_view());
-
-        // a. If roundingPriority is "morePrecision", then
-        if (rounding_priority_string == "morePrecision"sv) {
-            // i. Set intlObj.[[RoundingType]] to morePrecision.
-            intl_object.set_rounding_type(NumberFormatBase::RoundingType::MorePrecision);
-        }
-        // b. Else if roundingPriority is "lessPrecision", then
-        else if (rounding_priority_string == "lessPrecision"sv) {
-            // i. Set intlObj.[[RoundingType]] to lessPrecision.
-            intl_object.set_rounding_type(NumberFormatBase::RoundingType::LessPrecision);
-        }
-        // c. Else if hasSd is true, then
-        else if (has_significant_digits) {
-            // i. Set intlObj.[[RoundingType]] to significantDigits.
-            intl_object.set_rounding_type(NumberFormatBase::RoundingType::SignificantDigits);
-        }
-        // d. Else,
-        else {
-            // i. Set intlObj.[[RoundingType]] to fractionDigits.
-            intl_object.set_rounding_type(NumberFormatBase::RoundingType::FractionDigits);
-        }
-    }
-
-    // 27. Else,
-    else {
-        // a. Set intlObj.[[RoundingType]] to morePrecision.
-        intl_object.set_rounding_type(NumberFormatBase::RoundingType::MorePrecision);
-
-        // b. Set intlObj.[[MinimumFractionDigits]] to 0.
+    // 26. If needSd is false and needFd is false, then
+    if (!need_significant_digits && !need_fraction_digits) {
+        // a. Set intlObj.[[MinimumFractionDigits]] to 0.
         intl_object.set_min_fraction_digits(0);
 
-        // c. Set intlObj.[[MaximumFractionDigits]] to 0.
+        // b. Set intlObj.[[MaximumFractionDigits]] to 0.
         intl_object.set_max_fraction_digits(0);
 
-        // d. Set intlObj.[[MinimumSignificantDigits]] to 1.
+        // c. Set intlObj.[[MinimumSignificantDigits]] to 1.
         intl_object.set_min_significant_digits(1);
 
-        // e. Set intlObj.[[MaximumSignificantDigits]] to 2.
+        // d. Set intlObj.[[MaximumSignificantDigits]] to 2.
         intl_object.set_max_significant_digits(2);
+
+        // e. Set intlObj.[[RoundingType]] to morePrecision.
+        intl_object.set_rounding_type(NumberFormatBase::RoundingType::MorePrecision);
+    }
+    // 27. Else if roundingPriority is "morePrecision", then
+    else if (rounding_priority == "morePrecision"sv) {
+        // a. Set intlObj.[[RoundingType]] to morePrecision.
+        intl_object.set_rounding_type(NumberFormatBase::RoundingType::MorePrecision);
+
+    }
+    // 28. Else if roundingPriority is "lessPrecision", then
+    else if (rounding_priority == "lessPrecision"sv) {
+        // a. Set intlObj.[[RoundingType]] to lessPrecision.
+        intl_object.set_rounding_type(NumberFormatBase::RoundingType::LessPrecision);
+    }
+    // 29. Else if hasSd is true, then
+    else if (has_significant_digits) {
+        // a. Set intlObj.[[RoundingType]] to significantDigits.
+        intl_object.set_rounding_type(NumberFormatBase::RoundingType::SignificantDigits);
+    }
+    // 30. Else,
+    else {
+        // a. Set intlObj.[[RoundingType]] to fractionDigits.
+        intl_object.set_rounding_type(NumberFormatBase::RoundingType::FractionDigits);
     }
 
-    // 28. If roundingIncrement is not 1, then
+    // 31. If roundingIncrement is not 1, then
     if (rounding_increment != 1) {
         // a. If intlObj.[[RoundingType]] is not fractionDigits, throw a TypeError exception.
         if (intl_object.rounding_type() != NumberFormatBase::RoundingType::FractionDigits)
@@ -441,7 +431,7 @@ ThrowCompletionOr<void> set_number_format_unit_options(VM& vm, NumberFormat& int
             return vm.throw_completion<TypeError>(ErrorType::IntlOptionUndefined, "currency"sv, "style"sv, style);
     }
     // 7. Else,
-    //     a. If ! IsWellFormedCurrencyCode(currency) is false, throw a RangeError exception.
+    //     a. If IsWellFormedCurrencyCode(currency) is false, throw a RangeError exception.
     else if (!is_well_formed_currency_code(TRY(currency.as_string().utf8_string_view())))
         return vm.throw_completion<RangeError>(ErrorType::OptionIsNotValidValue, currency, "currency"sv);
 

Userland/Libraries/LibJS/Runtime/Intl/NumberFormatFunction.cpp

@@ -11,7 +11,6 @@
 namespace JS::Intl {
 
 // 15.5.2 Number Format Functions, https://tc39.es/ecma402/#sec-number-format-functions
-// 1.5.2 Number Format Functions, https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-number-format-functions
 NonnullGCPtr<NumberFormatFunction> NumberFormatFunction::create(Realm& realm, NumberFormat& number_format)
 {
     return realm.heap().allocate<NumberFormatFunction>(realm, number_format, *realm.intrinsics().function_prototype()).release_allocated_value_but_fixme_should_propagate_errors();

Userland/Libraries/LibJS/Runtime/Intl/NumberFormatPrototype.cpp

@@ -65,7 +65,6 @@ JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format)
 }
 
 // 15.3.4 Intl.NumberFormat.prototype.formatToParts ( value ), https://tc39.es/ecma402/#sec-intl.numberformat.prototype.formattoparts
-// 1.3.4 Intl.NumberFormat.prototype.formatToParts ( value ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-intl.numberformat.prototype.formattoparts
 JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format_to_parts)
 {
     auto value = vm.argument(0);
@@ -81,7 +80,7 @@ JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format_to_parts)
     return TRY(format_numeric_to_parts(vm, *number_format, move(mathematical_value)));
 }
 
-// 1.3.5 Intl.NumberFormat.prototype.formatRange ( start, end ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-intl.numberformat.prototype.formatrange
+// 15.3.5 Intl.NumberFormat.prototype.formatRange ( start, end ), https://tc39.es/ecma402/#sec-intl.numberformat.prototype.formatrange
 JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format_range)
 {
     auto start = vm.argument(0);
@@ -108,7 +107,7 @@ JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format_range)
     return PrimitiveString::create(vm, move(formatted));
 }
 
-// 1.3.6 Intl.NumberFormat.prototype.formatRangeToParts ( start, end ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-intl.numberformat.prototype.formatrangetoparts
+// 15.3.6 Intl.NumberFormat.prototype.formatRangeToParts ( start, end ), https://tc39.es/ecma402/#sec-intl.numberformat.prototype.formatrangetoparts
 JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format_range_to_parts)
 {
     auto start = vm.argument(0);
@@ -134,8 +133,7 @@ JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::format_range_to_parts)
     return TRY(format_numeric_range_to_parts(vm, *number_format, move(x), move(y)));
 }
 
-// 15.3.5 Intl.NumberFormat.prototype.resolvedOptions ( ), https://tc39.es/ecma402/#sec-intl.numberformat.prototype.resolvedoptions
-// 1.3.7 Intl.NumberFormat.prototype.resolvedOptions ( ), https://tc39.es/proposal-intl-numberformat-v3/out/numberformat/proposed.html#sec-number-format-functions
+// 15.3.7 Intl.NumberFormat.prototype.resolvedOptions ( ), https://tc39.es/ecma402/#sec-intl.numberformat.prototype.resolvedoptions
 JS_DEFINE_NATIVE_FUNCTION(NumberFormatPrototype::resolved_options)
 {
     auto& realm = *vm.current_realm();

Userland/Libraries/LibJS/Runtime/Intl/PluralRules.cpp

@@ -92,7 +92,6 @@ PluralRules::PluralRules(Object& prototype)
 }
 
 // 16.5.3 ResolvePlural ( pluralRules, n ), https://tc39.es/ecma402/#sec-resolveplural
-// 1.5.3 ResolvePlural ( pluralRules, n ), https://tc39.es/proposal-intl-numberformat-v3/out/pluralrules/proposed.html#sec-resolveplural
 ThrowCompletionOr<ResolvedPlurality> resolve_plural(VM& vm, PluralRules const& plural_rules, Value number)
 {
     return resolve_plural(vm, plural_rules, plural_rules.type(), number);
@@ -132,13 +131,13 @@ ThrowCompletionOr<ResolvedPlurality> resolve_plural(VM& vm, NumberFormatBase con
     return ResolvedPlurality { plural_category, move(string) };
 }
 
-// 1.5.4 PluralRuleSelectRange ( locale, type, xp, yp ), https://tc39.es/proposal-intl-numberformat-v3/out/pluralrules/proposed.html#sec-pluralruleselectrange
+// 16.5.4 PluralRuleSelectRange ( locale, type, xp, yp ), https://tc39.es/ecma402/#sec-resolveplural
 ::Locale::PluralCategory plural_rule_select_range(StringView locale, ::Locale::PluralForm, ::Locale::PluralCategory start, ::Locale::PluralCategory end)
 {
     return ::Locale::determine_plural_range(locale, start, end);
 }
 
-// 1.5.5 ResolvePluralRange ( pluralRules, x, y ), https://tc39.es/proposal-intl-numberformat-v3/out/pluralrules/proposed.html#sec-resolvepluralrange
+// 16.5.5 ResolvePluralRange ( pluralRules, x, y ), https://tc39.es/ecma402/#sec-resolveplural
 ThrowCompletionOr<::Locale::PluralCategory> resolve_plural_range(VM& vm, PluralRules const& plural_rules, Value start, Value end)
 {
     // 1. Assert: Type(pluralRules) is Object.

Userland/Libraries/LibJS/Runtime/Intl/PluralRulesPrototype.cpp

@@ -36,7 +36,6 @@ ThrowCompletionOr<void> PluralRulesPrototype::initialize(Realm& realm)
 }
 
 // 16.3.3 Intl.PluralRules.prototype.select ( value ), https://tc39.es/ecma402/#sec-intl.pluralrules.prototype.select
-// 1.3.3 Intl.PluralRules.prototype.select ( value ), https://tc39.es/proposal-intl-numberformat-v3/out/pluralrules/proposed.html#sec-intl.pluralrules.prototype.select
 JS_DEFINE_NATIVE_FUNCTION(PluralRulesPrototype::select)
 {
     // 1. Let pr be the this value.
@@ -51,7 +50,7 @@ JS_DEFINE_NATIVE_FUNCTION(PluralRulesPrototype::select)
     return MUST_OR_THROW_OOM(PrimitiveString::create(vm, ::Locale::plural_category_to_string(plurality.plural_category)));
 }
 
-// 1.3.4 Intl.PluralRules.prototype.selectRange ( start, end ), https://tc39.es/proposal-intl-numberformat-v3/out/pluralrules/proposed.html#sec-intl.pluralrules.prototype.selectrange
+// 16.3.4 Intl.PluralRules.prototype.selectRange ( start, end ), https://tc39.es/ecma402/#sec-intl.pluralrules.prototype.selectrange
 JS_DEFINE_NATIVE_FUNCTION(PluralRulesPrototype::select_range)
 {
     auto start = vm.argument(0);
@@ -78,8 +77,7 @@ JS_DEFINE_NATIVE_FUNCTION(PluralRulesPrototype::select_range)
     return MUST_OR_THROW_OOM(PrimitiveString::create(vm, ::Locale::plural_category_to_string(plurality)));
 }
 
-// 16.3.4 Intl.PluralRules.prototype.resolvedOptions ( ), https://tc39.es/ecma402/#sec-intl.pluralrules.prototype.resolvedoptions
-// 1.3.5 Intl.PluralRules.prototype.resolvedOptions ( ), https://tc39.es/proposal-intl-numberformat-v3/out/pluralrules/proposed.html#sec-intl.pluralrules.prototype.resolvedoptions
+// 16.3.5 Intl.PluralRules.prototype.resolvedOptions ( ), https://tc39.es/ecma402/#sec-intl.pluralrules.prototype.resolvedoptions
 JS_DEFINE_NATIVE_FUNCTION(PluralRulesPrototype::resolved_options)
 {
     auto& realm = *vm.current_realm();

Userland/Libraries/LibJS/Runtime/Intl/RelativeTimeFormat.cpp

@@ -178,7 +178,7 @@ ThrowCompletionOr<Vector<PatternPartitionWithUnit>> partition_relative_time_patt
     // 20. Let fv be ! PartitionNumberPattern(relativeTimeFormat.[[NumberFormat]], value).
     auto value_partitions = MUST_OR_THROW_OOM(partition_number_pattern(vm, relative_time_format.number_format(), Value(value)));
 
-    // 21. Let pr be ! ResolvePlural(relativeTimeFormat.[[PluralRules]], value).
+    // 21. Let pr be ! ResolvePlural(relativeTimeFormat.[[PluralRules]], value).[[PluralCategory]].
     auto plurality = MUST_OR_THROW_OOM(resolve_plural(vm, relative_time_format.plural_rules(), Value(value)));
 
     // 22. Let pattern be po.[[<pr>]].