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Now that the GC allocator is able to invoke Cell subclass constructors
directly via friendship, we no longer need to keep them public. :^)
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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.
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https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules
"The compiler is more likely to get the default semantics right and
you cannot implement these functions better than the compiler."
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This implements ordered sets using Maps with a sentinel value, and
includes some extra set tests.
Fixes #11004.
Co-Authored-By: davidot <davidot@serenityos.org>
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This ensures insertion-order iteration.
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This will allow us to use these traits for other hash-based containers
(like Map). This commit also adds a special case for negative zero
values, because while the equality check used same_value_zero which is
negative/positive zero insensitive, the hash was not.
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This makes sure that is<Set> checks done on the Set prototype instead of
on Set instances return false, thereby emulating the behaviour of the
RequireInternalSlot abstract operation.
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This makes sure they dont get garbage collected while stored in a Set.
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