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LibJS: Implement Intl.NumberFormat.prototype.formatToParts
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@ -5,6 +5,7 @@
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*/
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#include <AK/Array.h>
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#include <LibJS/Runtime/Array.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Intl/NumberFormat.h>
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#include <LibJS/Runtime/Intl/NumberFormatFunction.h>
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@ -959,6 +960,43 @@ String format_numeric(NumberFormat& number_format, double number)
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return result.build();
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}
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// 15.1.9 FormatNumericToParts ( numberFormat, x ), https://tc39.es/ecma402/#sec-formatnumbertoparts
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Array* format_numeric_to_parts(GlobalObject& global_object, NumberFormat& number_format, double number)
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{
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auto& vm = global_object.vm();
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// 1. Let parts be ? PartitionNumberPattern(numberFormat, x).
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// Note: Our implementation of PartitionNumberPattern does not throw.
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auto parts = partition_number_pattern(number_format, number);
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// 2. Let result be ArrayCreate(0).
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auto* result = MUST(Array::create(global_object, 0));
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// 3. Let n be 0.
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size_t n = 0;
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// 4. For each Record { [[Type]], [[Value]] } part in parts, do
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for (auto& part : parts) {
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// a. Let O be OrdinaryObjectCreate(%Object.prototype%).
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auto* object = Object::create(global_object, global_object.object_prototype());
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// b. Perform ! CreateDataPropertyOrThrow(O, "type", part.[[Type]]).
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MUST(object->create_data_property_or_throw(vm.names.type, js_string(vm, part.type)));
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// c. Perform ! CreateDataPropertyOrThrow(O, "value", part.[[Value]]).
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MUST(object->create_data_property_or_throw(vm.names.value, js_string(vm, move(part.value))));
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// d. Perform ! CreateDataPropertyOrThrow(result, ! ToString(n), O).
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MUST(result->create_data_property_or_throw(n, object));
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// e. Increment n by 1.
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++n;
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}
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// 5. Return result.
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return result;
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}
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static String cut_trailing_zeroes(StringView string, int cut)
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{
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// These steps are exactly the same between ToRawPrecision and ToRawFixed.
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