If a DecimalFormat pattern contains a decimal point and
setDecimalPatternMatchRequired is true, then DecimalFormat parse() fails
to parse infinity/NaN representations. This is because infinity/NaN
parsing does not set the HAS_DECIMAL_SEPARATOR_FLAG and so the
RequireDecimalSeparatorValidator fails.
This modifies the RequireDecimalSeparatorValidator so that it does not
fail if the INFINITY or NAN flags are set, making it so decimal
separators are not required if the infinity/NaN representations are
parsed.
This updates the MF2 spec tests to 943479b602 with the following exceptions:
- functions/currency.json and functions/math.json are omitted because these are not yet implemented
- bidi.json will be handled in a future PR
- u-options.json will be handled in a future PR
Changes include:
* `:integer` now returns a value encapsulating the rounded numeric value of the argument, rather than
the value itself.
* Fallbacks are handled according to the current spec.
* Fallback values are not passed into functions.
* Characters inside literal fallbacks are properly escaped.
* The test runner skips null values properly.
* The test runner handles boolean `expErrors` in defaultTestProperties.
* `:string` normalizes its input and normalizeNFC() has been refactored so it can be called there.
Inside of locimp_forLanguageTag() in _appendKeywords() in uloc_tag.cpp
there's a hardcoded special case for "-u-va-posix" which appends the
"_POSIX" variant but this was missed during the refactoring made for
ICU-22520 (there isn't any test case that covers this).
So the call to locimp_forLanguageTag() did more than previously
understood, but we still don't want to have to call that for every
language tag that has BCP-47 extensions just in order to get to this
special case. Instead, add a special case also to ulocimp_getSubtags().
For this to work nicely, the loop in _getVariant() that copies variants
needs to be refactored so that it easily can break when encountering the
start of any BCP-47 extension (which also has the welcome side-effect of
making it more efficient, being able to append an entire variant at once
to the output sink).
This was broken by commit 678d5c1273.
