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LibJS: Implement ECMA-402 Number.prototype.toLocaleString

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Timothy Flynn 2021-11-16 19:35:40 -05:00 • committed by Linus Groh
parent 8fe1c1f788
commit c19c3205ff
3 changed files with 106 additions and 0 deletions
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27
Userland/Libraries/LibJS/Runtime/NumberPrototype.cpp
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@ -7,9 +7,12 @@
#include <AK/Function.h>
#include <AK/TypeCasts.h>
#include <LibJS/Runtime/AbstractOperations.h>
#include <LibJS/Runtime/Completion.h>
#include <LibJS/Runtime/Error.h>
#include <LibJS/Runtime/GlobalObject.h>
#include <LibJS/Runtime/Intl/NumberFormat.h>
#include <LibJS/Runtime/Intl/NumberFormatConstructor.h>
#include <LibJS/Runtime/NumberObject.h>
#include <LibJS/Runtime/NumberPrototype.h>
@ -37,6 +40,7 @@ void NumberPrototype::initialize(GlobalObject& object)
Object::initialize(object);
u8 attr = Attribute::Configurable | Attribute::Writable;
define_native_function(vm.names.toFixed, to_fixed, 1, attr);
define_native_function(vm.names.toLocaleString, to_locale_string, 0, attr);
define_native_function(vm.names.toString, to_string, 1, attr);
define_native_function(vm.names.valueOf, value_of, 0, attr);
}
@ -77,6 +81,29 @@ JS_DEFINE_NATIVE_FUNCTION(NumberPrototype::to_fixed)
return js_string(vm, String::formatted("{:0.{1}}", number, static_cast<size_t>(fraction_digits)));
}
// 18.2.1 Number.prototype.toLocaleString ( [ locales [ , options ] ] ), https://tc39.es/ecma402/#sup-number.prototype.tolocalestring
JS_DEFINE_NATIVE_FUNCTION(NumberPrototype::to_locale_string)
{
auto locales = vm.argument(0);
auto options = vm.argument(1);
// 1. Let x be ? thisNumberValue(this value).
auto number_value = TRY(this_number_value(global_object, vm.this_value(global_object)));
MarkedValueList arguments { vm.heap() };
arguments.append(locales);
arguments.append(options);
// 2. Let numberFormat be ? Construct(%NumberFormat%, « locales, options »).
auto* number_format = static_cast<Intl::NumberFormat*>(TRY(construct(global_object, *global_object.intl_number_format_constructor(), move(arguments))));
// 3. Return ? FormatNumeric(numberFormat, x).
// Note: Our implementation of FormatNumeric does not throw.
auto formatted = Intl::format_numeric(*number_format, number_value.as_double());
return js_string(vm, move(formatted));
}
// 21.1.3.6 Number.prototype.toString ( [ radix ] ), https://tc39.es/ecma262/#sec-number.prototype.tostring
JS_DEFINE_NATIVE_FUNCTION(NumberPrototype::to_string)
{

1
Userland/Libraries/LibJS/Runtime/NumberPrototype.h
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@ -19,6 +19,7 @@ public:
virtual ~NumberPrototype() override;
JS_DECLARE_NATIVE_FUNCTION(to_fixed);
JS_DECLARE_NATIVE_FUNCTION(to_locale_string);
JS_DECLARE_NATIVE_FUNCTION(to_string);
JS_DECLARE_NATIVE_FUNCTION(value_of);
};