LibJS: Adjust grammar for DateExtendedYear to exclude -000000

This is an editorial change in the Temporal spec.

See: https://github.com/tc39/proposal-temporal/commit/fb3e656

We lose the custom error message, but it's not the end of the world.

Userland/Libraries/LibJS/Runtime/ErrorTypes.h

@@ -236,7 +236,6 @@
     M(TemporalInvalidDurationString, "Invalid duration string '{}'")                                                                    \
     M(TemporalInvalidDurationStringFractionNotLast, "Invalid duration string '{}': fractional {} must not be proceeded by {}")          \
     M(TemporalInvalidEpochNanoseconds, "Invalid epoch nanoseconds value, must be in range -86400 * 10^17 to 86400 * 10^17")             \
-    M(TemporalInvalidExtendedYearNegativeZero, "Invalid extended year, must not be negative zero")                                      \
     M(TemporalInvalidInstantString, "Invalid instant string '{}'")                                                                      \
     M(TemporalInvalidISODate, "Invalid ISO date")                                                                                       \
     M(TemporalInvalidMonthCode, "Invalid month code")                                                                                   \

Userland/Libraries/LibJS/Runtime/Temporal/AbstractOperations.cpp

@@ -1113,47 +1113,43 @@ ThrowCompletionOr<ISODateTime> parse_iso_date_time(GlobalObject& global_object,
     else
         normalized_year = year_part.value_or("0");
 
-    // 7. If SameValue(year, "-000000") is true, throw a RangeError exception.
-    if (normalized_year == "-000000"sv)
-        return vm.throw_completion<RangeError>(global_object, ErrorType::TemporalInvalidExtendedYearNegativeZero);
-
-    // 8. Set year to ! ToIntegerOrInfinity(year).
+    // 7. Set year to ! ToIntegerOrInfinity(year).
     auto year = *normalized_year.to_int<i32>();
 
     u8 month;
-    // 9. If month is undefined, then
+    // 8. If month is undefined, then
     if (!month_part.has_value()) {
         // a. Set month to 1.
         month = 1;
     }
-    // 10. Else,
+    // 9. Else,
     else {
         // a. Set month to ! ToIntegerOrInfinity(month).
         month = *month_part->to_uint<u8>();
     }
 
     u8 day;
-    // 11. If day is undefined, then
+    // 10. If day is undefined, then
     if (!day_part.has_value()) {
         // a. Set day to 1.
         day = 1;
     }
-    // 12. Else,
+    // 11. Else,
     else {
         // a. Set day to ! ToIntegerOrInfinity(day).
         day = *day_part->to_uint<u8>();
     }
 
-    // 13. Set hour to ! ToIntegerOrInfinity(hour).
+    // 12. Set hour to ! ToIntegerOrInfinity(hour).
     u8 hour = *hour_part.value_or("0"sv).to_uint<u8>();
 
-    // 14. Set minute to ! ToIntegerOrInfinity(minute).
+    // 13. Set minute to ! ToIntegerOrInfinity(minute).
     u8 minute = *minute_part.value_or("0"sv).to_uint<u8>();
 
-    // 15. Set second to ! ToIntegerOrInfinity(second).
+    // 14. Set second to ! ToIntegerOrInfinity(second).
     u8 second = *second_part.value_or("0"sv).to_uint<u8>();
 
-    // 16. If second is 60, then
+    // 15. If second is 60, then
     if (second == 60) {
         // a. Set second to 59.
         second = 59;
@@ -1162,7 +1158,7 @@ ThrowCompletionOr<ISODateTime> parse_iso_date_time(GlobalObject& global_object,
     u16 millisecond;
     u16 microsecond;
     u16 nanosecond;
-    // 17. If fraction is not undefined, then
+    // 16. If fraction is not undefined, then
     if (fraction_part.has_value()) {
         // a. Set fraction to the string-concatenation of the previous value of fraction and the string "000000000".
         auto fraction = String::formatted("{}000000000", *fraction_part);
@@ -1176,7 +1172,7 @@ ThrowCompletionOr<ISODateTime> parse_iso_date_time(GlobalObject& global_object,
         // g. Set nanosecond to ! ToIntegerOrInfinity(nanosecond).
         nanosecond = *fraction.substring(7, 3).to_uint<u16>();
     }
-    // 18. Else,
+    // 17. Else,
     else {
         // a. Let millisecond be 0.
         millisecond = 0;
@@ -1186,15 +1182,15 @@ ThrowCompletionOr<ISODateTime> parse_iso_date_time(GlobalObject& global_object,
         nanosecond = 0;
     }
 
-    // 19. If ! IsValidISODate(year, month, day) is false, throw a RangeError exception.
+    // 18. If ! IsValidISODate(year, month, day) is false, throw a RangeError exception.
     if (!is_valid_iso_date(year, month, day))
         return vm.throw_completion<RangeError>(global_object, ErrorType::TemporalInvalidISODate);
 
-    // 20. If ! IsValidTime(hour, minute, second, millisecond, microsecond, nanosecond) is false, throw a RangeError exception.
+    // 19. If ! IsValidTime(hour, minute, second, millisecond, microsecond, nanosecond) is false, throw a RangeError exception.
     if (!is_valid_time(hour, minute, second, millisecond, microsecond, nanosecond))
         return vm.throw_completion<RangeError>(global_object, ErrorType::TemporalInvalidTime);
 
-    // 21. Return the Record { [[Year]]: year, [[Month]]: month, [[Day]]: day, [[Hour]]: hour, [[Minute]]: minute, [[Second]]: second, [[Millisecond]]: millisecond, [[Microsecond]]: microsecond, [[Nanosecond]]: nanosecond, [[Calendar]]: calendar }.
+    // 20. Return the Record { [[Year]]: year, [[Month]]: month, [[Day]]: day, [[Hour]]: hour, [[Minute]]: minute, [[Second]]: second, [[Millisecond]]: millisecond, [[Microsecond]]: microsecond, [[Nanosecond]]: nanosecond, [[Calendar]]: calendar }.
     return ISODateTime { .year = year, .month = month, .day = day, .hour = hour, .minute = minute, .second = second, .millisecond = millisecond, .microsecond = microsecond, .nanosecond = nanosecond, .calendar = Optional<String>(move(calendar_part)) };
 }
 

Userland/Libraries/LibJS/Runtime/Temporal/ISO8601.cpp

@@ -265,6 +265,9 @@ bool ISO8601Parser::parse_date_year()
                 return false;
         }
     }
+    // It is a Syntax Error if DateExtendedYear is "-000000" or "−000000" (U+2212 MINUS SIGN followed by 000000).
+    if (transaction.parsed_string_view().is_one_of("-000000"sv, "−000000"sv))
+        return false;
     m_state.parse_result.date_year = transaction.parsed_string_view();
     transaction.commit();
     return true;

Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainDate/PlainDate.from.js

@@ -53,9 +53,9 @@ describe("errors", () => {
     test("extended year must not be negative zero", () => {
         expect(() => {
             Temporal.PlainDate.from("-000000-01-01");
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid date string '-000000-01-01'");
         expect(() => {
             Temporal.PlainDate.from("−000000-01-01"); // U+2212
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid date string '−000000-01-01'");
     });
 });

Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainDateTime/PlainDateTime.from.js

@@ -190,9 +190,9 @@ describe("errors", () => {
     test("extended year must not be negative zero", () => {
         expect(() => {
             Temporal.PlainDateTime.from("-000000-01-01");
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid date time string '-000000-01-01'");
         expect(() => {
             Temporal.PlainDateTime.from("−000000-01-01"); // U+2212
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid date time string '−000000-01-01'");
     });
 });

Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainMonthDay/PlainMonthDay.from.js

@@ -79,9 +79,9 @@ describe("errors", () => {
     test("extended year must not be negative zero", () => {
         expect(() => {
             Temporal.PlainMonthDay.from("-000000-01-01");
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid month day string '-000000-01-01'");
         expect(() => {
             Temporal.PlainMonthDay.from("−000000-01-01"); // U+2212
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid month day string '−000000-01-01'");
     });
 });

Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainTime/PlainTime.from.js

@@ -68,10 +68,10 @@ describe("errors", () => {
     test("extended year must not be negative zero", () => {
         expect(() => {
             Temporal.PlainTime.from("-000000-01-01T00:00:00");
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid time string '-000000-01-01T00:00:00'");
         expect(() => {
             Temporal.PlainTime.from("−000000-01-01T00:00:00"); // U+2212
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid time string '−000000-01-01T00:00:00'");
     });
 
     test("ambiguous string must contain a time designator", () => {

Userland/Libraries/LibJS/Tests/builtins/Temporal/PlainYearMonth/PlainYearMonth.from.js

@@ -105,9 +105,9 @@ describe("errors", () => {
     test("extended year must not be negative zero", () => {
         expect(() => {
             Temporal.PlainYearMonth.from("-000000-01");
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+        }).toThrowWithMessage(RangeError, "Invalid year month string '-000000-01'");
         expect(() => {
-            Temporal.PlainYearMonth.from("−000000-01-01"); // U+2212
-        }).toThrowWithMessage(RangeError, "Invalid extended year, must not be negative zero");
+            Temporal.PlainYearMonth.from("−000000-01"); // U+2212
+        }).toThrowWithMessage(RangeError, "Invalid year month string '−000000-01'");
     });
 });