This is a continuation of the previous three commits.
Now that create() receives the allocating realm, we can simply forward
that to allocate(), which accounts for the majority of these changes.
Additionally, we can get rid of the realm_from_global_object() in one
place, with one more remaining in VM::throw_completion().
This is a continuation of the previous two commits.
As allocating a JS cell already primarily involves a realm instead of a
global object, and we'll need to pass one to the allocate() function
itself eventually (it's bridged via the global object right now), the
create() functions need to receive a realm as well.
The plan is for this to be the highest-level function that actually
receives a realm and passes it around, AOs on an even higher level will
use the "current realm" concept via VM::current_realm() as that's what
the spec assumes; passing around realms (or global objects, for that
matter) on higher AO levels is pointless and unlike for allocating
individual objects, which may happen outside of regular JS execution, we
don't need control over the specific realm that is being used there.
This is a continuation of the previous commit.
Calling initialize() is the first thing that's done after allocating a
cell on the JS heap - and in the common case of allocating an object,
that's where properties are assigned and intrinsics occasionally
accessed.
Since those are supposed to live on the realm eventually, this is
another step into that direction.
No functional changes - we can still very easily get to the global
object via `Realm::global_object()`. This is in preparation of moving
the intrinsics to the realm and no longer having to pass a global
object when allocating any object.
In a few (now, and many more in subsequent commits) places we get a
realm using `GlobalObject::associated_realm()`, this is intended to be
temporary. For example, create() functions will later receive the same
treatment and are passed a realm instead of a global object.
This isn't called out in TR-35, but before ICU even looks at CLDR data,
it adds a hard-coded set of default patterns to each locale's calendar.
It has done this since 2006 when its DateTimeFormat feature was first
created. Several test262 tests depend on this, which under ECMA-402,
falls into "implementation defined" behavior. For compatibility, we
can do the same in LibUnicode.
The Intl mathematical value is much like ECMA-262's mathematical value
in that it is meant to represent an arbitrarily precise number. The Intl
MV further allows positive/negative infinity, negative zero, and NaN.
This implementation is *not* arbitrarily precise. Rather, it is a
replacement for the use of Value within Intl.NumberFormat. The exact
syntax of the Intl MV is still being worked on, but abstracting this
away into its own class will allow hooking in the finalized Intl MV
more easily, and makes implementing Intl.NumberFormat.formatRange
easier.
Note the methods added here are essentially the same as the static
helpers in Intl/NumberFormat.cpp.
After the Intl MV is implemented, returning a copy of the desired value
here may involve copying non-trivial data. Instead, return an enum to
indicate which decision was made.
This becomes more of an issue when implementing the Intl mathematical
value, where negative zero is treated as a special enum value. In that
case, we already previously changed the value from -0 to +0 in step 1b.
Entering the branch for step 4 will then set it back to -0.
The math that follows after these steps worked fine with both +0/-0, but
assertions will be reached in the Intl MV implementation.
These were changed to i8 while investigating the issues fixed by commit
9e50f25. When [[RoundingIncrement]] is implemented, some of these will
be invoked with [[RoundingIncrement]]'s value, which can be up to 5000.
Change these to i32, and wrap them with AK::Checked for good measure.
Also change a couple helpers that are always comparing against zero to
not need an explicit check.
The largest exponents we compute are on the order of 10^21 (governed by
the maximumSignificantDigits option, which has a max value of 21). That
is too large to fit into the i64 we were using when multiplying this
exponent by the value to be formatted.
Instead, split up the logic to multiply that value by this exponent
based on the value's underlying type:
Number: Do not cast the result of pow() to an i64, and perform the
follow-up multiplication with doubles.
BigInt: Do not use pow(). Instead, compute the exponent as a BigInt
from the start, then perform the follow-up multiplication with that
BigInt.
For example, consider the locales "en-u-nu-fullwide" or "en-u-nu-arab".
The CLDR only declares the "latn" numbering system for the "en" locale,
thus ResolveLocale would change the locale to "en-u-nu-latn". This patch
allows using non-latn numbering systems digits.
In the main spec, [[UseGrouping]] can be true or false. In V3, it may be
one of:
auto: Respect the per-locale preference for grouping.
always: Ignore per-locale preference for grouping and always insert
the grouping separator (note: true is now an alias for always).
min2: Ignore per-locale preference for grouping and only insert the
grouping separator if the primary group has at least 2 digits.
false: Ignore per-locale preference for grouping and never insert
the grouping separator.
This contains minimal changes to parse newly added and modified options
from the Intl.NumberFormat V3 proposal, while maintaining main spec
behavior in Intl.NumberFormat.prototype.format. The parsed options are
reflected only in Intl.NumberFormat.prototype.resolvedOptions and the js
REPL.
Each of these strings would previously rely on StringView's char const*
constructor overload, which would call __builtin_strlen on the string.
Since we now have operator ""sv, we can replace these with much simpler
versions. This opens the door to being able to remove
StringView(char const*).
No functional changes.
This also allows removing a bit of a BigInt hack to resolve plurality of
BigInt numbers (because the AOs used in ResolvePlural support BigInt,
wherease the naive Unicode::select_pattern_with_plurality did not).
We use cardinal form here; the number format patterns in the CLDR align
with the cardinal form of the plural rules.
The NumberFormat spec casually indicates the need for a PluralRules
object without explicity saying so, with text such as:
"which may depend on x in languages having different plural forms."
Other implementations actually do create a PluralRules object to resolve
those cases with ResolvePlural. However, ResolvePlural doesn't need much
from PluralRules to operate, so this can be abstracted out for use in
NumberFormat without the need to allocate a PluralRules instance.
The PluralCategory enum is currently generated for plural rules. Instead
of generating it, this moves the enum to the public LibUnicode header.
While it was nice to auto-discover these values, they are well defined
by TR-35, and we will need their values from within the number format
code generator (which can't rely on the plural rules generator having
run yet). Further, number format will require additional values in the
enum that plural rules doesn't know about.
The JS::Intl enum was added when implementing the PluralRules
constructor. Now that LibUnicode has a plural rules implementation,
replace the JS::Intl enum with the analagous Unicode enum.
This commit has no behavior changes.
In particular, this does not fix any of the wrong uses of the previous
default parameter (which used to be 'false', meaning "only replace the
first occurence in the string"). It simply replaces the default uses by
String::replace(..., ReplaceMode::FirstOnly), leaving them incorrect.
