There may be 3 or 4 children here dependending on whether the peer
expansion is being used as the context for another macro expansion,
make sure the discriminator in these cases always comes after the
operator. No test case as it's covered by the next commit.
For reparenting, we rely on a default associated conformance witness accessor
to build the witness table for 'Self: NewParent' at runtime. This means that
when mangling the symbol for such a descriptor, we need support for there
being no associated type at all; it's just tau_0_0 aka Self as the subject.
This patch extends _default_ associated conformance witness accessor mangling
to support a GenericTypeParamType for the subject, as the non-default accessors
already quietly did have support; see `mangleAssociatedConformanceDescriptor`.
It was quiet in the sense that there was no demangling support for it, nor
documentation about it either. So I've brought both kinds of witness accessor
manglings up-to-par, without extending the `assoc-type-name` grammar itself.
This updates a large number of internal symbols, function names,
and types to match the final approved terminology. Matching the
surface language terminology and the compiler internals should
make the code easier for people to understand into the future.
This is currently not wired up to anything. I am going to wire it up in
subsequent commits.
The reason why we are introducing this new Builtin type is to represent that we
are going to start stealing bits from the protocol witness table pointer of the
Optional<any Actor> that this type is bitwise compatible with. The type will
ensure that this value is only used in places where we know that it will be
properly masked out giving us certainty that this value will not be used in any
manner without it first being bit cleared and transformed back to Optional<any
Actor>.
So far, constant propagated arguments could only be builtin literals.
Now we support arbitrary structs (with constant arguments), e.g. `Int`.
This requires a small addition in the mangling scheme for function specializations.
Also, the de-mangling tree now looks a bit different to support a "tree" of structs and literals.
This patch adds parsing and extracting of the Swift reflection
metadata data segments from within the WebAssembly DATA section and
tests it using swift-reflection-dump. This is needed to allow LLDB to
acces Swift reflection metadata when attached to WebAssembly
processes.
rdar://159217213
This patch adds a new SymbolicExtendedExistentialTypeRef kind, and
wires it up in TypeDecoder, TypeRefBuilder, TypeLowering, and
ASTDemangler.
This is tested indirectly via the matching LLDB commit.
We sometimes mangle SILFunctionTypes when generating debug info
for reabstraction thunks, and these can have various exotic
parameter and result attributes. Two recent additions were
never plumbed through the mangler, causing assertion failures
when emitting debug info.
Fixes rdar://153730847.
We stack-allocate 512 of these entries for a temporary cache, so the entry size matters a great deal. Shrink it from 3 words to 2 by storing treatAsIdentifier in the low bit of the node pointer.
rdar://149685318
If a retroactive conformance is conditional and the subject type of a
conditional requirement is an opaque archetype, the mangler would
emit a mangling using the "HO" operator which the demangler did not
understand.
Implement de/remangler support for the "HO" operator.
Fixes rdar://149801864.
* [CS] Decline to handle InlineArray in shrink
Previously we would try the contextual type `(<int>, <element>)`,
which is wrong. Given we want to eliminate shrink, let's just bail.
* [Sema] Sink `ValueMatchVisitor` into `applyUnboundGenericArguments`
Make sure it's called for sugar code paths too. Also let's just always
run it since it should be a pretty cheap check.
* [Sema] Diagnose passing integer to non-integer type parameter
This was previously missed, though would have been diagnosed later
as a requirement failure.
* [Parse] Split up `canParseType`
While here, address the FIXME in `canParseTypeSimpleOrComposition`
and only check to see if we can parse a type-simple, including
`each`, `some`, and `any` for better recovery.
* Introduce type sugar for InlineArray
Parse e.g `[3 x Int]` as type sugar for InlineArray. Gated behind
an experimental feature flag for now.
Raw identifiers are backtick-delimited identifiers that can contain any
non-identifier character other than the backtick itself, CR, LF, or other
non-printable ASCII code units, and which are also not composed entirely
of operator characters.
To pave the way for the new experimental feature which will operate on '@const' attribute and expand the scope of what's currently handled by '_const' without breaking compatibility, for now.
The issue here is that the demangler (since we have a postfix mangling) parses
parameters/results/etc and then uses earlier postfix type arguments to attach
the relevant types to the parameters/results/etc. Since the flag for a sending
result was placed in between the parameters and results, we get an off by one
error.
Rather than fix that specific issue by introducing an offset for the off by one
error, I used the fact that the impl-function part of the mangling is not ABI
and can be modified to move the bit used to signify a sending result to before
the parameters so the whole problem is avoided.
I also while I was doing this looked through the sending result mangling for any
further issues and fixed them as I found them.
rdar://141962865
Fixes the immediate problem, but the presence of demangling code in the
runtime means that we'll need a follow-up to fix the compiler so that it
doesn't try to use the demangler to materialize metadata for function types
that have both isolation and a sending result.
rdar://142443925
