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LibJS: Add spec comments to Value::to_string()

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Linus Groh 2022-12-09 23:56:05 +00:00
parent 9a961af0b0
commit 596b30df5f
1 changed files with 23 additions and 8 deletions
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31
Userland/Libraries/LibJS/Runtime/Value.cpp
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@ -379,22 +379,37 @@ ThrowCompletionOr<DeprecatedString> Value::to_string(VM& vm) const
return number_to_string(m_value.as_double);
switch (m_value.tag) {
case UNDEFINED_TAG:
return "undefined"sv;
case NULL_TAG:
return "null"sv;
case BOOLEAN_TAG:
return as_bool() ? "true"sv : "false"sv;
case INT32_TAG:
return DeprecatedString::number(as_i32());
// 1. If argument is a String, return argument.
case STRING_TAG:
return as_string().deprecated_string();
// 2. If argument is a Symbol, throw a TypeError exception.
case SYMBOL_TAG:
return vm.throw_completion<TypeError>(ErrorType::Convert, "symbol", "string");
// 3. If argument is undefined, return "undefined".
case UNDEFINED_TAG:
return "undefined"sv;
// 4. If argument is null, return "null".
case NULL_TAG:
return "null"sv;
// 5. If argument is true, return "true".
// 6. If argument is false, return "false".
case BOOLEAN_TAG:
return as_bool() ? "true"sv : "false"sv;
// 7. If argument is a Number, return Number::toString(argument, 10).
case INT32_TAG:
return DeprecatedString::number(as_i32());
// 8. If argument is a BigInt, return BigInt::toString(argument, 10).
case BIGINT_TAG:
return as_bigint().big_integer().to_base(10);
// 9. Assert: argument is an Object.
case OBJECT_TAG: {
// 10. Let primValue be ? ToPrimitive(argument, string).
auto primitive_value = TRY(to_primitive(vm, PreferredType::String));
// 11. Assert: primValue is not an Object.
VERIFY(!primitive_value.is_object());
// 12. Return ? ToString(primValue).
return primitive_value.to_string(vm);
}
default: