mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2025-04-25 14:05:15 +00:00
a8d6e5c3db
These are going to be included in the ECMA-262 AOs once Temporal reaches stage 4. There's no need to keep them in the Temporal namespace. Some upcoming Temporal editorial changes will get awkward without this patch.
58 lines
2.2 KiB
C++
58 lines
2.2 KiB
C++
/*
|
||
* Copyright (c) 2022-2025, Tim Flynn <trflynn89@ladybird.org>
|
||
*
|
||
* SPDX-License-Identifier: BSD-2-Clause
|
||
*/
|
||
|
||
#include <LibJS/Runtime/Intl/PluralRules.h>
|
||
#include <LibJS/Runtime/VM.h>
|
||
|
||
namespace JS::Intl {
|
||
|
||
GC_DEFINE_ALLOCATOR(PluralRules);
|
||
|
||
// 17 PluralRules Objects, https://tc39.es/ecma402/#pluralrules-objects
|
||
PluralRules::PluralRules(Object& prototype)
|
||
: NumberFormatBase(prototype)
|
||
{
|
||
}
|
||
|
||
// 17.5.2 ResolvePlural ( pluralRules, n ), https://tc39.es/ecma402/#sec-resolveplural
|
||
Unicode::PluralCategory resolve_plural(PluralRules const& plural_rules, Value number)
|
||
{
|
||
// 1. If n is not a finite Number, then
|
||
if (!number.is_finite_number()) {
|
||
// a. Let s be ! ToString(n).
|
||
// b. Return the Record { [[PluralCategory]]: "other", [[FormattedString]]: s }.
|
||
return Unicode::PluralCategory::Other;
|
||
}
|
||
|
||
// 2. Let res be FormatNumericToString(pluralRules, ℝ(n)).
|
||
// 3. Let s be res.[[FormattedString]].
|
||
// 4. Let locale be pluralRules.[[Locale]].
|
||
// 5. Let type be pluralRules.[[Type]].
|
||
// 6. Let p be PluralRuleSelect(locale, type, s).
|
||
// 7. Return the Record { [[PluralCategory]]: p, [[FormattedString]]: s }.
|
||
return plural_rules.formatter().select_plural(number.as_double());
|
||
}
|
||
|
||
// 17.5.4 ResolvePluralRange ( pluralRules, x, y ), https://tc39.es/ecma402/#sec-resolveplural
|
||
ThrowCompletionOr<Unicode::PluralCategory> resolve_plural_range(VM& vm, PluralRules const& plural_rules, Value start, Value end)
|
||
{
|
||
// 1. If x is NaN or y is NaN, throw a RangeError exception.
|
||
if (start.is_nan())
|
||
return vm.throw_completion<RangeError>(ErrorType::NumberIsNaN, "start"sv);
|
||
if (end.is_nan())
|
||
return vm.throw_completion<RangeError>(ErrorType::NumberIsNaN, "end"sv);
|
||
|
||
// 2. Let xp be ResolvePlural(pluralRules, x).
|
||
// 3. Let yp be ResolvePlural(pluralRules, y).
|
||
// 4. If xp.[[FormattedString]] is yp.[[FormattedString]], then
|
||
// a. Return xp.[[PluralCategory]].
|
||
// 5. Let locale be pluralRules.[[Locale]].
|
||
// 6. Let type be pluralRules.[[Type]].
|
||
// 7. Return PluralRuleSelectRange(locale, type, xp.[[PluralCategory]], yp.[[PluralCategory]]).
|
||
return plural_rules.formatter().select_plural_range(start.as_double(), end.as_double());
|
||
}
|
||
|
||
}
|