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LibJS: Simplify TimeSpecWithOptionalTimeZoneNotAmbiguous

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This is a normative change in the Temporal spec.

See: 77b0163
This commit is contained in:
Linus Groh 2022-08-25 21:38:29 +01:00
parent f29c7cab16
commit 42452a81a2
2 changed files with 65 additions and 68 deletions
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131
Userland/Libraries/LibJS/Runtime/Temporal/ISO8601.cpp
View file

@ -323,6 +323,25 @@ bool ISO8601Parser::parse_date_month()
return true;
}
// https://tc39.es/proposal-temporal/#prod-DateMonthWithThirtyOneDays
bool ISO8601Parser::parse_date_month_with_thirty_days()
{
// DateMonthWithThirtyOneDays : one of
// 01 03 05 07 08 10 12
StateTransaction transaction { *this };
auto success = m_state.lexer.consume_specific("01"sv)
|| m_state.lexer.consume_specific("03"sv)
|| m_state.lexer.consume_specific("05"sv)
|| m_state.lexer.consume_specific("07"sv)
|| m_state.lexer.consume_specific("08"sv)
|| m_state.lexer.consume_specific("10"sv)
|| m_state.lexer.consume_specific("12"sv);
if (!success)
return false;
transaction.commit();
return true;
}
// https://tc39.es/proposal-temporal/#prod-DateDay
bool ISO8601Parser::parse_date_day()
{
@ -383,6 +402,41 @@ bool ISO8601Parser::parse_date_spec_month_day()
return true;
}
// https://tc39.es/proposal-temporal/#prod-ValidMonthDay
bool ISO8601Parser::parse_valid_month_day()
{
// ValidMonthDay :
// DateMonth -[opt] 0 NonZeroDigit
// DateMonth -[opt] 1 DecimalDigit
// DateMonth -[opt] 2 DecimalDigit
// DateMonth -[opt] 30 but not one of 0230 or 02-30
// DateMonthWithThirtyOneDays -[opt] 31
StateTransaction transaction { *this };
if (parse_date_month()) {
m_state.lexer.consume_specific('-');
if (m_state.lexer.consume_specific('0')) {
if (!parse_non_zero_digit())
return false;
} else if (m_state.lexer.consume_specific('1') || m_state.lexer.consume_specific('2')) {
if (!parse_decimal_digit())
return false;
} else if (m_state.lexer.consume_specific("30"sv)) {
if (transaction.parsed_string_view().is_one_of("0230"sv, "02-30"sv))
return false;
} else {
return false;
}
} else if (parse_date_month_with_thirty_days()) {
m_state.lexer.consume_specific('-');
if (!m_state.lexer.consume_specific("31"sv))
return false;
} else {
return false;
}
transaction.commit();
return true;
}
// https://tc39.es/proposal-temporal/#prod-Date
bool ISO8601Parser::parse_date()
{
@ -1134,77 +1188,18 @@ bool ISO8601Parser::parse_time_hour_minute_basic_format_not_ambiguous_with_month
bool ISO8601Parser::parse_time_spec_with_optional_time_zone_not_ambiguous()
{
// TimeSpecWithOptionalTimeZoneNotAmbiguous :
// TimeHour TimeZoneNumericUTCOffsetNotAmbiguousWithDayOfMonth[opt] TimeZoneBracketedAnnotation[opt]
// TimeHourNotValidMonth TimeZone
// TimeHour : TimeMinute TimeZone[opt]
// TimeHourMinuteBasicFormatNotAmbiguousWithMonthDay TimeZoneBracketedAnnotation[opt]
// TimeHour TimeMinute TimeZoneNumericUTCOffsetNotAmbiguousWithMonth TimeZoneBracketedAnnotation[opt]
// TimeHour : TimeMinute : TimeSecond TimeFraction[opt] TimeZone[opt]
// TimeHour TimeMinute TimeSecondNotValidMonth TimeZone[opt]
// TimeHour TimeMinute TimeSecond TimeFraction TimeZone[opt]
// NOTE: Reverse order here because `TimeHour TimeZoneNumericUTCOffsetNotAmbiguousWithDayOfMonth[opt] TimeZoneBracketedAnnotation[opt]` can
// be a subset of `TimeHourNotValidMonth TimeZone`, so we'd not attempt to parse that but may not exhaust the input string.
// TimeSpec TimeZone[opt] but not one of ValidMonthDay or DateSpecYearMonth
{
StateTransaction transaction { *this };
if (parse_time_hour_not_valid_month() && parse_time_zone()) {
transaction.commit();
return true;
}
if (parse_valid_month_day() || parse_date_spec_year_month())
return false;
}
{
StateTransaction transaction { *this };
if (parse_time_hour()) {
if (m_state.lexer.consume_specific(':')) {
if (parse_time_minute()) {
if (m_state.lexer.consume_specific(':')) {
if (parse_time_second()) {
(void)parse_time_fraction();
(void)parse_time_zone();
transaction.commit();
return true;
}
} else {
(void)parse_time_zone();
transaction.commit();
return true;
}
}
} else if (parse_time_minute()) {
if (parse_time_zone_numeric_utc_offset_not_ambiguous_with_month()) {
(void)parse_time_zone_bracketed_annotation();
transaction.commit();
return true;
}
{
StateTransaction sub_transaction { *this };
if (parse_time_second() && parse_time_fraction()) {
(void)parse_time_zone();
transaction.commit();
return true;
}
}
if (parse_time_second_not_valid_month()) {
(void)parse_time_zone();
transaction.commit();
return true;
}
} else {
(void)parse_time_zone_numeric_utc_offset_not_ambiguous_with_day_of_month();
(void)parse_time_zone_bracketed_annotation();
transaction.commit();
return true;
}
}
}
{
StateTransaction transaction { *this };
if (parse_time_hour_minute_basic_format_not_ambiguous_with_month_day()) {
(void)parse_time_zone_bracketed_annotation();
transaction.commit();
return true;
}
}
return false;
StateTransaction transaction { *this };
if (!parse_time_spec())
return false;
(void)parse_time_zone();
transaction.commit();
return true;
}
// https://tc39.es/proposal-temporal/#prod-TimeSpecSeparator

2
Userland/Libraries/LibJS/Runtime/Temporal/ISO8601.h
View file

@ -104,9 +104,11 @@ public:
[[nodiscard]] bool parse_utc_designator();
[[nodiscard]] bool parse_date_year();
[[nodiscard]] bool parse_date_month();
[[nodiscard]] bool parse_date_month_with_thirty_days();
[[nodiscard]] bool parse_date_day();
[[nodiscard]] bool parse_date_spec_year_month();
[[nodiscard]] bool parse_date_spec_month_day();
[[nodiscard]] bool parse_valid_month_day();
[[nodiscard]] bool parse_date();
[[nodiscard]] bool parse_time_hour();
[[nodiscard]] bool parse_time_minute();