Major spec change: text references are to BCP47 (not the implementing RFCs) and
the single source of truth is now Unicode CLDR.
- Switch from IANA to CLDR for make_unicode
- Update grandfathered tag handling directly in the parser
- Don't support extlang, irregular, privateuse or 4-letter subtags
- Adjust comments to refer to Unicode BCP 47 locale identifiers, remove RFC 5646
- Canonicalize/order langtags correctly
- Tokenize BCP47 in reusable class
Based-on: m-c 1407674(partial), 1451082, 1530320, 1522070, 1531091
- Update make_unicode to output SpecialCasing
- Handle special casing
- Use realloc instead of malloc when resizing a newly created string buffer
Based-on: m-c 1318403, 1431957
- turn each Intl object into a NativeObject subclass
- create them as PlainObject
- ensure correct type is passed in self-hosted code
- implement legacy constructor semantics for DateTime&NumberFormat
- store internals on object slot instead of JS WeakMap
Based-on: m-c 1328386, 1332604
Based on Mozilla bugs 1270140, 1504656, 1483545, and 1504334.
Took note of Mozilla bug 1379222 which changed GetPrototypeFromCallableConstructor
to GetPrototypeFromBuiltinConstructor.
There are many other changes I did myself since the initial implementation by
Mozilla wouldn't work with this codebase.
According to the spec this isn't created until the module is instantiated, but
we create it when we compile the module.
We stored this previously in InitialEnvironmentSlot and copied it to
EnvironmentSlot when it was supposed to be created, but we can just store it in
the latter slot straight away and check the module's status and return null if
it shouldn't exist yet.
This reduces the number of slots needed on a moduleObject to 17.
Re: BZ 1420412 Part 1
We can't implement the second part to further reduce our number of slots,
because it relies on SetProxyReservedSlot which in turn relies on
rearchitecturing JS proxies to make reserved slots dynamic. That's a rabbit hole
we really don't want to fall into.
So, we'll end up being a bit slower because it can't be in-line allocated with
having more than 16 slots, but so be it. I sincerely doubt it will make any
practical difference.
This updates module implementation to match spec regarding handling of
instantiation errors, after it was changed yet again, this time to not remember
instantiation errors, but instead immediately rethrow applicable ones.
Ref: BZ 1420420
