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LibJS: Add the String.fromCodePoint() method
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5 changed files with 63 additions and 0 deletions
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@ -32,6 +32,7 @@ void StringConstructor::initialize(GlobalObject& global_object)
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u8 attr = Attribute::Writable | Attribute::Configurable;
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define_native_function(vm.names.raw, raw, 1, attr);
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define_native_function(vm.names.fromCharCode, from_char_code, 1, attr);
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define_native_function(vm.names.fromCodePoint, from_code_point, 1, attr);
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}
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StringConstructor::~StringConstructor()
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@ -120,4 +121,26 @@ JS_DEFINE_NATIVE_FUNCTION(StringConstructor::from_char_code)
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return js_string(vm, builder.build());
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}
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// 22.1.2.2 String.fromCodePoint ( ...codePoints ), https://tc39.es/ecma262/#sec-string.fromcodepoint
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JS_DEFINE_NATIVE_FUNCTION(StringConstructor::from_code_point)
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{
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StringBuilder builder;
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for (size_t i = 0; i < vm.argument_count(); ++i) {
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auto next_code_point = vm.argument(i).to_number(global_object);
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if (vm.exception())
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return {};
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if (!next_code_point.is_integer()) {
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vm.throw_exception<RangeError>(global_object, ErrorType::InvalidCodePoint, next_code_point.to_string_without_side_effects());
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return {};
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}
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auto code_point = next_code_point.to_i32(global_object);
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if (code_point < 0 || code_point > 0x10FFFF) {
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vm.throw_exception<RangeError>(global_object, ErrorType::InvalidCodePoint, next_code_point.to_string_without_side_effects());
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return {};
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}
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builder.append_code_point(code_point);
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}
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return js_string(vm, builder.build());
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}
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}
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