Two issues here:
- fix 2 build issue in i18n when compiling with clang++ -fsanitize=undefined
the following two symbols were not exported (and they should be):
typeinfo for icu::CollationCacheEntry
typeinfo for icu::numparse::impl::CodePointMatcher
- remove undefined behavior warning in NumberFormatTestTuple.. minor, but very annoying
when repeated many times during every test run. Tends to mask real errors.
> numberformattesttuple.cpp:319:5: runtime error: member access within null pointer of type 'NumberFormatTestTuple'
If you call the API getDefaultHourCycle on an empty DateTimePatternGenerator
instance (ie: no locale) then it calls UPRV_UNREACHABLE which calls abort().
We should return an error code instead of aborting.
Change the implementation of grapheme cluster matching in regex to use an ICU
break iterator instead of a little one-off state machine.
The old implementation had fallen behind the Unicode UAX-29 specification for
graphem clusters, and could not be easily updated.
The implementation follows the same general pattern that is used for finding
word boundaries with an ICU break iterator. In reviewing that code, a few
improvements to the handling of ICU error codes were also made.
Also note that this change adds a new dependency on Break Iteration. Regex
patterns that previously would work with ICU builds that were configured with
no break iteration will now fail. But only if they include \X for matching
grapheme cluster boundaries.
In regular expressions, when testing for word boundaries with \b, the
boundaries were incorrect when in Unicode mode, meaning that an ICU word break
iterator is being used to find the boundaries, and the text being matched is
UTF-8 encoded.
The bug stemmed from a misunderstanding of how string indexes work with UText
and break iterators, leading to the inclusion of code to convert from UTF-8 to
UTF-16 indexing, when what was wanted was the original UTF-8 index everywhere.
Removing the indexing conversion fixes the problem.
Compiled regular expression patterns make use of several shared common
UnicodeSets. This change simplifies the creation and use of these
static UnicodeSets.
- Pointer fields to the static sets are removed from the compiled patterns,
and the static variables are accessed directly. The deleted pointers
were a hold-over from earlier code that did not use shared statics.
- The UnicodeSet pattern literals are changed from hex constants to
u"string literals".
- The size of fRuleSets (from regexst.h) is changed from a hard-coded 10
to the number of UnicodeSets actually required. Doing this required
a change to regexcst.pl to export the required size. Changing and
rerunning this perl code resulted in massive but benign changes to
the generated file regexcst.h, the result of perl having changed its
order of enumeration of hashes since the file was last regenerated.
- UnicodeSets are frozen when possible. Should result in faster matching.
DateTimePatternGenerator needs to consider the hour-cycle preferred by
Locale. This means that we need to to override the hour-cycle when a
locale contains "hc" keyword. This patch is adding such functionality.
In addition, "DateTimePatternGenerator::adjustFieldTypes" should adjust
hour field to properly follow tr35
spec(https://www.unicode.org/reports/tr35/tr35-dates.html#dfst-hour).
- equivalent but originally unequal
- locale distance shifted left for additional fraction bits with micro distance
- Java more verbose matcher debug output
See #949
