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LibJS+LibUnicode: Generate missing patterns with fractionalSecondDigits

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TR-35's Matching Skeleton algorithm dictates how user requests including
fractional second digits should be handled when the CLDR format pattern
does not include that field. When the format pattern contains {second},
but does not contain {fractionalSecondDigits}, generate a second pattern
which appends "{decimal}{fractionalSecondDigits}" to the {second} field.
This commit is contained in:
Timothy Flynn 2021-12-06 22:50:54 -05:00 • committed by Linus Groh
parent 6ace4000bf
commit 9f7c727720
3 changed files with 46 additions and 7 deletions
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26
Meta/Lagom/Tools/CodeGenerators/LibUnicode/GenerateUnicodeDateTimeFormat.cpp
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@ -466,6 +466,13 @@ static void generate_missing_patterns(Calendar& calendar, Vector<CalendarPattern
return locale_data.unique_strings.ensure(move(new_pattern));
};
auto inject_fractional_second_digits = [&](auto format) {
auto pattern = locale_data.unique_strings.get(format);
auto new_pattern = pattern.replace("{second}"sv, "{second}{decimal}{fractionalSecondDigits}"sv);
return locale_data.unique_strings.ensure(move(new_pattern));
};
auto append_if_unique = [&](auto format) {
auto format_index = locale_data.unique_patterns.ensure(move(format));
@ -473,11 +480,28 @@ static void generate_missing_patterns(Calendar& calendar, Vector<CalendarPattern
calendar.available_formats.append(format_index);
};
Vector<CalendarPattern> time_formats_with_fractional_second_digits;
for (auto const& format : date_formats)
append_if_unique(format);
for (auto const& format : time_formats)
for (auto const& format : time_formats) {
append_if_unique(format);
if (format.second.has_value() && !format.fractional_second_digits.has_value()) {
auto new_format = format;
new_format.fractional_second_digits = 2;
new_format.pattern_index = inject_fractional_second_digits(new_format.pattern_index);
if (new_format.pattern12_index != 0)
new_format.pattern12_index = inject_fractional_second_digits(new_format.pattern12_index);
time_formats_with_fractional_second_digits.append(new_format);
append_if_unique(move(new_format));
}
}
time_formats.extend(move(time_formats_with_fractional_second_digits));
for (auto const& date_format : date_formats) {
CalendarPatternIndexType date_time_format_index = 0;