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swift-mirror/lib/Serialization/Deserialization.cpp
Manman Ren a842fff29f [Serializer] serialize the parent module of NormalProtocolConformance. 
We used to just use FileContext at deserialization time. That causes
multiple NormalProtocolConformances with the same protocol and type,
but from different modules. And we will have issues at IRGen.

With this commit, we serialize the parent module and deserialize the parent
module, and we are not going to have multiple NormalProtocolConformances with
the same protocol and type.

rdar://16809311


Swift SVN r17675
2014-05-08 03:40:47 +00:00

3238 lines
105 KiB
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//===--- Deserialization.cpp - Loading a serialized AST -------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2015 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See http://swift.org/LICENSE.txt for license information
// See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
#include "swift/Serialization/ModuleFile.h"
#include "swift/Serialization/ModuleFormat.h"
#include "swift/AST/AST.h"
#include "swift/AST/PrettyStackTrace.h"
#include "swift/ClangImporter/ClangImporter.h"
#include "swift/Serialization/BCReadingExtras.h"
#include "llvm/Support/raw_ostream.h"
using namespace swift;
using namespace swift::serialization;
using ConformancePair = std::pair<ProtocolDecl *, ProtocolConformance *>;
namespace {
struct IDAndKind {
const Decl *D;
DeclID ID;
};
static raw_ostream &operator<<(raw_ostream &os, IDAndKind &&pair) {
return os << Decl::getKindName(pair.D->getKind())
<< "Decl #" << pair.ID;
}
class PrettyDeclDeserialization : public llvm::PrettyStackTraceEntry {
const ModuleFile::Serialized<Decl*> &DeclOrOffset;
DeclID ID;
decls_block::RecordKind Kind;
public:
PrettyDeclDeserialization(const ModuleFile::Serialized<Decl*> &declOrOffset,
DeclID DID, decls_block::RecordKind kind)
: DeclOrOffset(declOrOffset), ID(DID), Kind(kind) {
}
static const char *getRecordKindString(decls_block::RecordKind Kind) {
switch (Kind) {
#define RECORD(Id) case decls_block::Id: return #Id;
#include "swift/Serialization/DeclTypeRecordNodes.def"
}
}
virtual void print(raw_ostream &os) const override {
if (!DeclOrOffset.isComplete()) {
os << "While deserializing decl #" << ID << " ("
<< getRecordKindString(Kind) << ")\n";
return;
}
os << "While deserializing ";
if (auto VD = dyn_cast<ValueDecl>(DeclOrOffset.get())) {
os << "'" << VD->getName() << "' (" << IDAndKind{VD, ID} << ") \n";
} else if (auto ED = dyn_cast<ExtensionDecl>(DeclOrOffset.get())) {
os << "extension of '" << ED->getExtendedType() << "' ("
<< IDAndKind{ED, ID} << ") \n";
} else {
os << IDAndKind{DeclOrOffset.get(), ID} << "\n";
}
}
};
class PrettyXRefTrace : public llvm::PrettyStackTraceEntry {
class PathPiece {
public:
enum class Kind {
Value,
Operator,
OperatorFilter,
Accessor,
Extension,
GenericParam,
Unknown
};
private:
Kind kind;
void *data;
template <typename T>
T getDataAs() const {
return llvm::PointerLikeTypeTraits<T>::getFromVoidPointer(data);
}
public:
template <typename T>
PathPiece(Kind K, T value)
: kind(K),
data(llvm::PointerLikeTypeTraits<T>::getAsVoidPointer(value)) {}
void print(raw_ostream &os) const {
switch (kind) {
case Kind::Value:
os << getDataAs<Identifier>();
break;
case Kind::Extension:
if (getDataAs<Module *>())
os << "in an extension in module '" << getDataAs<Module *>()->Name
<< "'";
else
os << "in an extension in any module";
break;
case Kind::Operator:
os << "operator " << getDataAs<Identifier>();
break;
case Kind::OperatorFilter:
switch (getDataAs<uintptr_t>()) {
case Infix:
os << "(infix)";
break;
case Prefix:
os << "(prefix)";
break;
case Postfix:
os << "(postfix)";
break;
default:
os << "(unknown operator filter)";
break;
}
break;
case Kind::Accessor:
switch (getDataAs<uintptr_t>()) {
case Getter:
os << "(getter)";
break;
case Setter:
os << "(setter)";
break;
case WillSet:
os << "(willSet)";
break;
case DidSet:
os << "(didSet)";
break;
default:
os << "(unknown accessor kind)";
break;
}
break;
case Kind::GenericParam:
os << "generic param #" << getDataAs<uintptr_t>();
break;
case Kind::Unknown:
os << "unknown xref kind " << getDataAs<uintptr_t>();
break;
}
}
};
private:
Module &baseM;
SmallVector<PathPiece, 8> path;
public:
PrettyXRefTrace(Module &M) : baseM(M) {}
void addValue(Identifier name) {
path.push_back({ PathPiece::Kind::Value, name });
}
void addOperator(Identifier name) {
path.push_back({ PathPiece::Kind::Operator, name });
}
void addOperatorFilter(uint8_t fixity) {
path.push_back({ PathPiece::Kind::OperatorFilter,
static_cast<uintptr_t>(fixity) });
}
void addAccessor(uint8_t kind) {
path.push_back({ PathPiece::Kind::Accessor,
static_cast<uintptr_t>(kind) });
}
void addExtension(Module *M) {
path.push_back({ PathPiece::Kind::Extension, M });
}
void addGenericParam(uintptr_t index) {
path.push_back({ PathPiece::Kind::GenericParam, index });
}
void addUnknown(uintptr_t kind) {
path.push_back({ PathPiece::Kind::Unknown, kind });
}
virtual void print(raw_ostream &os) const override {
os << "Cross-reference to module '" << baseM.Name << "'\n";
for (auto &piece : path) {
os << "\t... ";
piece.print(os);
os << "\n";
}
}
};
} // end anonymous namespace
/// Skips a single record in the bitstream.
///
/// Returns true if the next entry is a record of type \p recordKind.
/// Destroys the stream position if the next entry is not a record.
static bool skipRecord(llvm::BitstreamCursor &cursor, unsigned recordKind) {
auto next = cursor.advance(AF_DontPopBlockAtEnd);
if (next.Kind != llvm::BitstreamEntry::Record)
return false;
SmallVector<uint64_t, 64> scratch;
StringRef blobData;
#if NDEBUG
cursor.skipRecord(next.ID);
return true;
#else
unsigned kind = cursor.readRecord(next.ID, scratch, &blobData);
return kind == recordKind;
#endif
}
/// Translate from the serialization DefaultArgumentKind enumerators, which are
/// guaranteed to be stable, to the AST ones.
static Optional<swift::DefaultArgumentKind>
getActualDefaultArgKind(uint8_t raw) {
switch (static_cast<serialization::DefaultArgumentKind>(raw)) {
case serialization::DefaultArgumentKind::None:
return swift::DefaultArgumentKind::None;
case serialization::DefaultArgumentKind::Normal:
return swift::DefaultArgumentKind::Normal;
case serialization::DefaultArgumentKind::Inherited:
return swift::DefaultArgumentKind::Inherited;
case serialization::DefaultArgumentKind::Column:
return swift::DefaultArgumentKind::Column;
case serialization::DefaultArgumentKind::File:
return swift::DefaultArgumentKind::File;
case serialization::DefaultArgumentKind::Line:
return swift::DefaultArgumentKind::Line;
case serialization::DefaultArgumentKind::Function:
return swift::DefaultArgumentKind::Function;
}
return Nothing;
}
Pattern *ModuleFile::maybeReadPattern() {
using namespace decls_block;
SmallVector<uint64_t, 8> scratch;
auto next = DeclTypeCursor.advance(AF_DontPopBlockAtEnd);
if (next.Kind != llvm::BitstreamEntry::Record)
return nullptr;
unsigned kind = DeclTypeCursor.readRecord(next.ID, scratch);
switch (kind) {
case decls_block::PAREN_PATTERN: {
bool isImplicit;
ParenPatternLayout::readRecord(scratch, isImplicit);
Pattern *subPattern = maybeReadPattern();
assert(subPattern);
auto result = new (getContext()) ParenPattern(SourceLoc(),
subPattern,
SourceLoc(),
isImplicit);
result->setType(subPattern->getType());
return result;
}
case decls_block::TUPLE_PATTERN: {
TypeID tupleTypeID;
unsigned count;
bool hasVararg;
bool isImplicit;
TuplePatternLayout::readRecord(scratch, tupleTypeID, count, hasVararg,
isImplicit);
SmallVector<TuplePatternElt, 8> elements;
for ( ; count > 0; --count) {
scratch.clear();
next = DeclTypeCursor.advance();
assert(next.Kind == llvm::BitstreamEntry::Record);
kind = DeclTypeCursor.readRecord(next.ID, scratch);
assert(kind == decls_block::TUPLE_PATTERN_ELT);
// FIXME: Add something for this record or remove it.
uint8_t rawDefaultArg;
TuplePatternEltLayout::readRecord(scratch, rawDefaultArg);
Pattern *subPattern = maybeReadPattern();
assert(subPattern);
// Decode the default argument kind.
// FIXME: Default argument expression, if available.
swift::DefaultArgumentKind defaultArgKind
= swift::DefaultArgumentKind::None;
if (auto defaultArg = getActualDefaultArgKind(rawDefaultArg))
defaultArgKind = *defaultArg;
elements.push_back(TuplePatternElt(subPattern, nullptr,
defaultArgKind));
}
auto result = TuplePattern::create(getContext(), SourceLoc(),
elements, SourceLoc(), hasVararg,
SourceLoc(), isImplicit);
result->setType(getType(tupleTypeID));
return result;
}
case decls_block::NAMED_PATTERN: {
DeclID varID;
bool isImplicit;
NamedPatternLayout::readRecord(scratch, varID, isImplicit);
auto var = cast<VarDecl>(getDecl(varID));
auto result = new (getContext()) NamedPattern(var, isImplicit);
if (var->hasType())
result->setType(var->getType());
return result;
}
case decls_block::ANY_PATTERN: {
TypeID typeID;
bool isImplicit;
AnyPatternLayout::readRecord(scratch, typeID, isImplicit);
auto result = new (getContext()) AnyPattern(SourceLoc(), isImplicit);
result->setType(getType(typeID));
return result;
}
case decls_block::TYPED_PATTERN: {
TypeID typeID;
bool isImplicit;
TypedPatternLayout::readRecord(scratch, typeID, isImplicit);
Pattern *subPattern = maybeReadPattern();
assert(subPattern);
TypeLoc typeInfo = TypeLoc::withoutLoc(getType(typeID));
auto result = new (getContext()) TypedPattern(subPattern, typeInfo,
isImplicit);
result->setType(typeInfo.getType());
return result;
}
case decls_block::VAR_PATTERN: {
bool isImplicit;
VarPatternLayout::readRecord(scratch, isImplicit);
Pattern *subPattern = maybeReadPattern();
assert(subPattern);
auto result = new (getContext()) VarPattern(SourceLoc(), subPattern,
isImplicit);
result->setType(subPattern->getType());
return result;
}
default:
return nullptr;
}
}
/// Find a (possibly-inherited) conformance for a particular protocol.
// FIXME: Checking the module is not very resilient. What if the conformance is
// moved into a re-exported module instead?
static ProtocolConformance *findConformance(ProtocolDecl *proto,
const Module *module,
ProtocolConformance *conformance) {
if (!conformance)
return nullptr;
if (conformance->getProtocol() == proto) {
if (conformance->getDeclContext()->getParentModule() == module)
return conformance;
return nullptr;
}
auto &inheritedMap = conformance->getInheritedConformances();
auto directIter = inheritedMap.find(proto);
if (directIter != inheritedMap.end()) {
if (directIter->second->getDeclContext()->getParentModule() == module)
return directIter->second;
return nullptr;
}
for (auto inheritedEntry : inheritedMap)
if (auto result = findConformance(proto, module, inheritedEntry.second))
return result;
return nullptr;
}
ProtocolConformance *
ModuleFile::readReferencedConformance(ProtocolDecl *proto,
DeclID typeID,
IdentifierID moduleID,
llvm::BitstreamCursor &Cursor) {
if (moduleID == serialization::BUILTIN_MODULE_ID) {
// The underlying conformance is in the following record.
return *maybeReadConformance(getType(typeID), Cursor);
}
// Dig out the protocol conformance within the nominal declaration.
auto nominal = cast<NominalTypeDecl>(getDecl(typeID));
Module *owningModule = getModule(moduleID);
// Search protocols
for (auto conformance : nominal->getConformances())
if (auto result = findConformance(proto, owningModule, conformance))
return result;
// Search extensions.
for (auto ext : nominal->getExtensions())
for (auto conformance : ext->getConformances())
if (auto result = findConformance(proto, owningModule, conformance))
return result;
llvm_unreachable("Unable to find underlying conformance");
}
Optional<ProtocolConformance *>
ModuleFile::maybeReadConformance(Type conformingType,
llvm::BitstreamCursor &Cursor) {
using namespace decls_block;
BCOffsetRAII lastRecordOffset(Cursor);
SmallVector<uint64_t, 16> scratch;
auto next = Cursor.advance(AF_DontPopBlockAtEnd);
if (next.Kind != llvm::BitstreamEntry::Record)
return Nothing;
unsigned kind = Cursor.readRecord(next.ID, scratch);
switch (kind) {
case NO_CONFORMANCE: {
lastRecordOffset.reset();
DeclID protoID;
NoConformanceLayout::readRecord(scratch, protoID);
return nullptr;
}
case NORMAL_PROTOCOL_CONFORMANCE:
// Handled below.
break;
case SPECIALIZED_PROTOCOL_CONFORMANCE: {
DeclID protoID;
DeclID typeID;
ModuleID moduleID;
unsigned numSubstitutions;
SpecializedProtocolConformanceLayout::readRecord(scratch, protoID,
typeID,
moduleID,
numSubstitutions);
ASTContext &ctx = getContext();
auto proto = cast<ProtocolDecl>(getDecl(protoID));
// Read the substitutions.
SmallVector<Substitution, 4> substitutions;
while (numSubstitutions--) {
auto sub = maybeReadSubstitution(Cursor);
assert(sub.hasValue() && "Missing substitution?");
substitutions.push_back(*sub);
}
ProtocolConformance *genericConformance
= readReferencedConformance(proto, typeID, moduleID, Cursor);
// Reset the offset RAII to the end of the trailing records.
lastRecordOffset.reset();
assert(genericConformance && "Missing generic conformance?");
return ctx.getSpecializedConformance(conformingType, genericConformance,
ctx.AllocateCopy(substitutions));
}
case INHERITED_PROTOCOL_CONFORMANCE: {
DeclID protoID;
DeclID typeID;
ModuleID moduleID;
InheritedProtocolConformanceLayout::readRecord(scratch, protoID,
typeID,
moduleID);
ASTContext &ctx = getContext();
auto proto = cast<ProtocolDecl>(getDecl(protoID));
ProtocolConformance *inheritedConformance
= readReferencedConformance(proto, typeID, moduleID, Cursor);
// Reset the offset RAII to the end of the trailing records.
lastRecordOffset.reset();
assert(inheritedConformance && "Missing generic conformance?");
return ctx.getInheritedConformance(conformingType, inheritedConformance);
}
// Not a protocol conformance.
default:
return Nothing;
}
lastRecordOffset.reset();
DeclID protoID;
ModuleID ownerID;
unsigned valueCount, typeCount, inheritedCount, defaultedCount;
bool isIncomplete;
ArrayRef<uint64_t> rawIDs;
NormalProtocolConformanceLayout::readRecord(scratch, protoID, ownerID,
valueCount, typeCount,
inheritedCount, defaultedCount,
isIncomplete, rawIDs);
auto proto = cast<ProtocolDecl>(getDecl(protoID));
ASTContext &ctx = getContext();
auto conformance = ctx.getConformance(conformingType, proto, SourceLoc(),
getModule(ownerID),
ProtocolConformanceState::Incomplete);
InheritedConformanceMap inheritedConformances;
while (inheritedCount--) {
auto inherited = maybeReadConformance(conformingType, Cursor);
assert(inherited.hasValue());
inheritedConformances[(*inherited)->getProtocol()] = *inherited;
}
// Reset the offset RAII to the end of the trailing records.
lastRecordOffset.reset();
if (conformance->getState() == ProtocolConformanceState::Incomplete)
if (conformance->getInheritedConformances().empty())
for (auto inherited : inheritedConformances)
conformance->setInheritedConformance(inherited.first, inherited.second);
if (isIncomplete)
return conformance;
WitnessMap witnesses;
ArrayRef<uint64_t>::iterator rawIDIter = rawIDs.begin();
while (valueCount--) {
auto first = cast<ValueDecl>(getDecl(*rawIDIter++));
auto second = cast_or_null<ValueDecl>(getDecl(*rawIDIter++));
assert(second || first->getAttrs().isOptional());
unsigned substitutionCount = *rawIDIter++;
SmallVector<Substitution, 8> substitutions;
while (substitutionCount--) {
auto sub = maybeReadSubstitution(Cursor);
assert(sub.hasValue());
substitutions.push_back(sub.getValue());
}
ConcreteDeclRef witness;
if (substitutions.empty())
witness = ConcreteDeclRef(second);
else
witness = ConcreteDeclRef(ctx, second, substitutions);
witnesses.insert(std::make_pair(first, witness));
if (second)
ctx.recordConformingDecl(second, first);
}
assert(rawIDIter <= rawIDs.end() && "read too much");
TypeWitnessMap typeWitnesses;
while (typeCount--) {
// FIXME: We don't actually want to allocate an archetype here; we just
// want to get an access path within the protocol.
auto first = cast<AssociatedTypeDecl>(getDecl(*rawIDIter++));
auto second = maybeReadSubstitution(Cursor);
assert(second.hasValue());
typeWitnesses[first] = *second;
}
assert(rawIDIter <= rawIDs.end() && "read too much");
SmallVector<ValueDecl *, 4> defaultedDefinitions;
while (defaultedCount--) {
auto decl = cast<ValueDecl>(getDecl(*rawIDIter++));
defaultedDefinitions.push_back(decl);
}
assert(rawIDIter <= rawIDs.end() && "read too much");
// Reset the offset RAII to the end of the trailing records.
lastRecordOffset.reset();
// If we have a complete protocol conformance do not attempt to initialize
// it. Just return the conformance.
if (conformance->getState() == ProtocolConformanceState::Complete)
return conformance;
// Set type witnesses.
for (auto typeWitness : typeWitnesses) {
conformance->setTypeWitness(typeWitness.first, typeWitness.second);
}
// Set witnesses.
for (auto witness : witnesses) {
conformance->setWitness(witness.first, witness.second);
}
// Note any defaulted definitions.
for (auto defaulted : defaultedDefinitions) {
conformance->addDefaultDefinition(defaulted);
}
conformance->setState(ProtocolConformanceState::Complete);
return conformance;
}
Optional<Substitution>
ModuleFile::maybeReadSubstitution(llvm::BitstreamCursor &cursor) {
BCOffsetRAII lastRecordOffset(cursor);
auto entry = cursor.advance(AF_DontPopBlockAtEnd);
if (entry.Kind != llvm::BitstreamEntry::Record)
return Nothing;
StringRef blobData;
SmallVector<uint64_t, 2> scratch;
unsigned recordID = cursor.readRecord(entry.ID, scratch, &blobData);
if (recordID != decls_block::BOUND_GENERIC_SUBSTITUTION)
return Nothing;
TypeID archetypeID, replacementID;
ArrayRef<uint64_t> rawConformanceData;
decls_block::BoundGenericSubstitutionLayout::readRecord(scratch,
archetypeID,
replacementID,
rawConformanceData);
auto archetypeTy = getType(archetypeID)->castTo<ArchetypeType>();
auto replacementTy = getType(replacementID);
SmallVector<ProtocolConformance *, 16> conformanceBuf;
ArrayRef<ProtocolDecl *> protos = archetypeTy->getConformsTo();
assert(rawConformanceData.size() % 2 == 0);
while (!rawConformanceData.empty()) {
ProtocolConformance *conformance = nullptr;
// A null associated type means there is no conformance.
if (DeclID(rawConformanceData[0])) {
conformance = readReferencedConformance(protos.front(),
rawConformanceData[0],
rawConformanceData[1],
cursor);
assert(conformance && "Missing conformance");
}
conformanceBuf.push_back(conformance);
protos = protos.slice(1);
rawConformanceData = rawConformanceData.slice(2);
}
lastRecordOffset.reset();
return Substitution{archetypeTy, replacementTy,
getContext().AllocateCopy(conformanceBuf)};
}
GenericParamList *
ModuleFile::maybeGetOrReadGenericParams(serialization::DeclID genericContextID,
DeclContext *DC,
llvm::BitstreamCursor &Cursor) {
if (genericContextID) {
Decl *genericContext = getDecl(genericContextID);
assert(genericContext && "loading PolymorphicFunctionType before its decl");
switch (genericContext->getKind()) {
case DeclKind::Constructor:
return cast<ConstructorDecl>(genericContext)->getGenericParams();
case DeclKind::Func:
return cast<FuncDecl>(genericContext)->getGenericParams();
case DeclKind::Class:
case DeclKind::Struct:
case DeclKind::Enum:
case DeclKind::Protocol:
return cast<NominalTypeDecl>(genericContext)->getGenericParams();
default:
return nullptr;
}
} else {
return maybeReadGenericParams(DC, Cursor);
}
}
GenericParamList *ModuleFile::maybeReadGenericParams(DeclContext *DC,
llvm::BitstreamCursor &Cursor,
GenericParamList *outerParams) {
using namespace decls_block;
assert(DC && "need a context for the decls in the list");
BCOffsetRAII lastRecordOffset(Cursor);
SmallVector<uint64_t, 8> scratch;
StringRef blobData;
auto next = Cursor.advance(AF_DontPopBlockAtEnd);
if (next.Kind != llvm::BitstreamEntry::Record)
return nullptr;
// Read the raw archetype IDs into a different scratch buffer
// because we need to keep this alive for longer.
SmallVector<uint64_t, 4> rawArchetypeIDsBuffer;
unsigned kind = Cursor.readRecord(next.ID, rawArchetypeIDsBuffer, &blobData);
if (kind != GENERIC_PARAM_LIST)
return nullptr;
// Read in the raw-archetypes buffer, but don't try to consume it yet.
ArrayRef<uint64_t> rawArchetypeIDs;
GenericParamListLayout::readRecord(rawArchetypeIDsBuffer, rawArchetypeIDs);
SmallVector<GenericParam, 8> params;
SmallVector<RequirementRepr, 8> requirements;
SmallVector<ArchetypeType *, 8> archetypes;
// The GenericTypeParamDecls might be from a different module file.
// If so, we need to map the archetype IDs from the serialized
// all-archetypes list in this module file over to the corresponding
// archetypes from the original generic parameter decls, or else
// we'll end up constructing fresh archetypes that don't match the
// ones from the generic parameters.
// We have to do this mapping before we might call getType on one of
// those archetypes, but after we've read all the generic parameters.
// Therefore we do it lazily.
bool haveMappedArchetypes = false;
auto mapArchetypes = [&] {
if (haveMappedArchetypes) return;
GenericParamList::deriveAllArchetypes(params, archetypes);
assert(rawArchetypeIDs.size() == archetypes.size());
for (unsigned index : indices(rawArchetypeIDs)) {
TypeID TID = rawArchetypeIDs[index];
auto &typeOrOffset = Types[TID-1];
if (typeOrOffset.isComplete()) {
// FIXME: this assertion is absolutely correct, but it's
// currently fouled up by the presence of archetypes in
// substitutions. Those *should* be irrelevant for all the
// cases where this is wrong, but...
//assert(typeOrOffset.get().getPointer() == archetypes[index] &&
// "already deserialized this archetype to a different type!");
// TODO: remove unsafeOverwrite when this hack goes away
typeOrOffset.unsafeOverwrite(archetypes[index]);
} else {
typeOrOffset = archetypes[index];
}
}
haveMappedArchetypes = true;
};
while (true) {
lastRecordOffset.reset();
bool shouldContinue = true;
auto entry = Cursor.advance(AF_DontPopBlockAtEnd);
if (entry.Kind != llvm::BitstreamEntry::Record)
break;
scratch.clear();
unsigned recordID = Cursor.readRecord(entry.ID, scratch,
&blobData);
switch (recordID) {
case GENERIC_PARAM: {
assert(!haveMappedArchetypes &&
"generic parameters interleaved with requirements?");
DeclID paramDeclID;
GenericParamLayout::readRecord(scratch, paramDeclID);
auto genericParam = cast<GenericTypeParamDecl>(getDecl(paramDeclID, DC));
params.push_back(GenericParam(genericParam));
break;
}
case GENERIC_REQUIREMENT: {
uint8_t rawKind;
ArrayRef<uint64_t> rawTypeIDs;
GenericRequirementLayout::readRecord(scratch, rawKind, rawTypeIDs);
mapArchetypes();
switch (rawKind) {
case GenericRequirementKind::Conformance: {
assert(rawTypeIDs.size() == 2);
auto subject = TypeLoc::withoutLoc(getType(rawTypeIDs[0]));
auto constraint = TypeLoc::withoutLoc(getType(rawTypeIDs[1]));
requirements.push_back(RequirementRepr::getConformance(subject,
SourceLoc(),
constraint));
break;
}
case GenericRequirementKind::SameType: {
assert(rawTypeIDs.size() == 2);
auto first = TypeLoc::withoutLoc(getType(rawTypeIDs[0]));
auto second = TypeLoc::withoutLoc(getType(rawTypeIDs[1]));
requirements.push_back(RequirementRepr::getSameType(first,
SourceLoc(),
second));
break;
}
case WitnessMarker: {
// Shouldn't happen where we have requirement representations.
error();
break;
}
default:
// Unknown requirement kind. Drop the requirement and continue, but log
// an error so that we don't actually try to generate code.
error();
}
break;
}
case LAST_GENERIC_REQUIREMENT:
// Read the end-of-requirements record.
uint8_t dummy;
LastGenericRequirementLayout::readRecord(scratch, dummy);
lastRecordOffset.reset();
shouldContinue = false;
break;
default:
// This record is not part of the GenericParamList.
shouldContinue = false;
break;
}
if (!shouldContinue)
break;
}
// Make sure we map the archetypes if we haven't yet.
mapArchetypes();
auto paramList = GenericParamList::create(getContext(), SourceLoc(),
params, SourceLoc(), requirements,
SourceLoc());
paramList->setAllArchetypes(getContext().AllocateCopy(archetypes));
paramList->setOuterParameters(outerParams ? outerParams :
DC->getGenericParamsOfContext());
return paramList;
}
void ModuleFile::readGenericRequirements(
SmallVectorImpl<Requirement> &requirements) {
using namespace decls_block;
BCOffsetRAII lastRecordOffset(DeclTypeCursor);
SmallVector<uint64_t, 8> scratch;
StringRef blobData;
while (true) {
lastRecordOffset.reset();
bool shouldContinue = true;
auto entry = DeclTypeCursor.advance(AF_DontPopBlockAtEnd);
if (entry.Kind != llvm::BitstreamEntry::Record)
break;
scratch.clear();
unsigned recordID = DeclTypeCursor.readRecord(entry.ID, scratch,
&blobData);
switch (recordID) {
case GENERIC_REQUIREMENT: {
uint8_t rawKind;
ArrayRef<uint64_t> rawTypeIDs;
GenericRequirementLayout::readRecord(scratch, rawKind, rawTypeIDs);
switch (rawKind) {
case GenericRequirementKind::Conformance: {
assert(rawTypeIDs.size() == 2);
auto subject = getType(rawTypeIDs[0]);
auto constraint = getType(rawTypeIDs[1]);
requirements.push_back(Requirement(RequirementKind::Conformance,
subject, constraint));
break;
}
case GenericRequirementKind::SameType: {
assert(rawTypeIDs.size() == 2);
auto first = getType(rawTypeIDs[0]);
auto second = getType(rawTypeIDs[1]);
requirements.push_back(Requirement(RequirementKind::SameType,
first, second));
break;
}
case GenericRequirementKind::WitnessMarker: {
assert(rawTypeIDs.size() == 1);
auto first = getType(rawTypeIDs[0]);
requirements.push_back(Requirement(RequirementKind::WitnessMarker,
first, Type()));
break;
}
default:
// Unknown requirement kind. Drop the requirement and continue, but log
// an error so that we don't actually try to generate code.
error();
}
break;
}
default:
// This record is not part of the GenericParamList.
shouldContinue = false;
break;
}
if (!shouldContinue)
break;
}
}
Optional<MutableArrayRef<Decl *>> ModuleFile::readMembers() {
using namespace decls_block;
auto entry = DeclTypeCursor.advance();
if (entry.Kind != llvm::BitstreamEntry::Record)
return Nothing;
SmallVector<uint64_t, 16> memberIDBuffer;
unsigned kind = DeclTypeCursor.readRecord(entry.ID, memberIDBuffer);
assert(kind == DECL_CONTEXT);
(void)kind;
ArrayRef<uint64_t> rawMemberIDs;
decls_block::DeclContextLayout::readRecord(memberIDBuffer, rawMemberIDs);
if (rawMemberIDs.empty())
return MutableArrayRef<Decl *>();
ASTContext &ctx = getContext();
MutableArrayRef<Decl *> members = ctx.Allocate<Decl *>(rawMemberIDs.size());
auto nextMember = members.begin();
for (DeclID rawID : rawMemberIDs) {
*nextMember = getDecl(rawID);
assert(*nextMember && "unable to deserialize next member");
++nextMember;
}
return members;
}
/// Remove values from \p values that don't match the expected type or module.
///
/// Both \p expectedTy and \p expectedModule can be omitted, in which case any
/// type or module is accepted. Values imported from Clang can also appear in
/// any module.
static void filterValues(Type expectedTy, Module *expectedModule,
SmallVectorImpl<ValueDecl *> &values) {
CanType canTy;
if (expectedTy)
canTy = expectedTy->getCanonicalType();
auto newEnd = std::remove_if(values.begin(), values.end(),
[=](ValueDecl *value) {
if (canTy && value->getInterfaceType()->getCanonicalType() != canTy)
return true;
// FIXME: Should be able to move a value from an extension in a derived
// module to the original definition in a base module.
if (expectedModule && !value->hasClangNode() &&
value->getModuleContext() != expectedModule)
return true;
return false;
});
values.erase(newEnd, values.end());
}
Decl *ModuleFile::resolveCrossReference(Module *M, uint32_t pathLen) {
using namespace decls_block;
assert(M && "missing dependency");
PrettyXRefTrace pathTrace(*M);
auto entry = DeclTypeCursor.advance(AF_DontPopBlockAtEnd);
if (entry.Kind != llvm::BitstreamEntry::Record) {
error();
return nullptr;
}
SmallVector<ValueDecl *, 8> values;
SmallVector<uint64_t, 8> scratch;
StringRef blobData;
// Read the first path piece. This one is special because lookup is performed
// against the base module, rather than against the previous link in the path.
// In particular, operator path pieces represent actual operators here, but
// filters on operator functions when they appear later on.
scratch.clear();
unsigned recordID = DeclTypeCursor.readRecord(entry.ID, scratch,
&blobData);
switch (recordID) {
case XREF_TYPE_PATH_PIECE:
case XREF_VALUE_PATH_PIECE: {
IdentifierID IID;
TypeID TID = 0;
if (recordID == XREF_TYPE_PATH_PIECE)
XRefTypePathPieceLayout::readRecord(scratch, IID);
else
XRefValuePathPieceLayout::readRecord(scratch, TID, IID);
Identifier name = getIdentifier(IID);
pathTrace.addValue(name);
M->lookupQualified(ModuleType::get(M), name, NL_QualifiedDefault,
/*typeResolver=*/nullptr, values);
filterValues(getType(TID), nullptr, values);
break;
}
case XREF_EXTENSION_PATH_PIECE:
llvm_unreachable("can only extend a nominal");
case XREF_OPERATOR_OR_ACCESSOR_PATH_PIECE: {
IdentifierID IID;
uint8_t rawOpKind;
XRefOperatorOrAccessorPathPieceLayout::readRecord(scratch, IID, rawOpKind);
Identifier opName = getIdentifier(IID);
pathTrace.addOperator(opName);
switch (rawOpKind) {
case OperatorKind::Infix:
return M->lookupInfixOperator(opName);
case OperatorKind::Prefix:
return M->lookupPrefixOperator(opName);
case OperatorKind::Postfix:
return M->lookupPostfixOperator(opName);
default:
// Unknown operator kind.
error();
return nullptr;
}
}
case XREF_GENERIC_PARAM_PATH_PIECE:
llvm_unreachable("only in a nominal or function");
default:
// Unknown xref kind.
pathTrace.addUnknown(recordID);
error();
return nullptr;
}
if (values.empty()) {
error();
return nullptr;
}
// Reset module filter.
M = nullptr;
// For remaining path pieces, filter or drill down into the results we have.
while (--pathLen) {
auto entry = DeclTypeCursor.advance(AF_DontPopBlockAtEnd);
if (entry.Kind != llvm::BitstreamEntry::Record) {
error();
return nullptr;
}
scratch.clear();
unsigned recordID = DeclTypeCursor.readRecord(entry.ID, scratch,
&blobData);
switch (recordID) {
case XREF_TYPE_PATH_PIECE:
case XREF_VALUE_PATH_PIECE: {
IdentifierID IID;
TypeID TID = 0;
if (recordID == XREF_TYPE_PATH_PIECE)
XRefTypePathPieceLayout::readRecord(scratch, IID);
else
XRefValuePathPieceLayout::readRecord(scratch, TID, IID);
Identifier memberName = getIdentifier(IID);
pathTrace.addValue(memberName);
if (values.size() != 1) {
error();
return nullptr;
}
auto nominal = dyn_cast<NominalTypeDecl>(values.front());
values.clear();
if (!nominal) {
error();
return nullptr;
}
auto members = nominal->lookupDirect(memberName);
values.append(members.begin(), members.end());
filterValues(getType(TID), M, values);
break;
}
case XREF_EXTENSION_PATH_PIECE: {
ModuleID ownerID;
XRefExtensionPathPieceLayout::readRecord(scratch, ownerID);
M = getModule(ownerID);
pathTrace.addExtension(M);
continue;
}
case XREF_OPERATOR_OR_ACCESSOR_PATH_PIECE: {
uint8_t rawKind;
XRefOperatorOrAccessorPathPieceLayout::readRecord(scratch, Nothing,
rawKind);
if (values.size() == 1) {
if (auto storage = dyn_cast<AbstractStorageDecl>(values.front())) {
pathTrace.addAccessor(rawKind);
switch (rawKind) {
case Getter:
values.front() = storage->getGetter();
break;
case Setter:
values.front() = storage->getSetter();
break;
case WillSet:
case DidSet:
llvm_unreachable("invalid XREF accessor kind");
default:
// Unknown accessor kind.
error();
return nullptr;
}
break;
}
}
pathTrace.addOperatorFilter(rawKind);
auto newEnd = std::remove_if(values.begin(), values.end(),
[=](ValueDecl *value) {
auto fn = dyn_cast<FuncDecl>(value);
if (!fn)
return true;
if (!fn->getOperatorDecl())
return true;
if (getStableFixity(fn->getOperatorDecl()->getKind()) != rawKind)
return true;
return false;
});
values.erase(newEnd, values.end());
break;
}
case XREF_GENERIC_PARAM_PATH_PIECE: {
if (values.size() != 1) {
error();
return nullptr;
}
uint32_t paramIndex;
XRefGenericParamPathPieceLayout::readRecord(scratch, paramIndex);
pathTrace.addGenericParam(paramIndex);
ValueDecl *base = values.front();
GenericParamList *paramList = nullptr;
if (auto nominal = dyn_cast<NominalTypeDecl>(base))
paramList = nominal->getGenericParams();
else if (auto fn = dyn_cast<FuncDecl>(base))
paramList = fn->getGenericParams();
else if (auto ctor = dyn_cast<ConstructorDecl>(base))
paramList = ctor->getGenericParams();
if (!paramList || paramIndex >= paramList->size()) {
error();
return nullptr;
}
values.clear();
values.push_back(paramList->getParams()[paramIndex].getDecl());
assert(values.back());
break;
}
default:
// Unknown xref path piece.
pathTrace.addUnknown(recordID);
error();
return nullptr;
}
if (values.empty()) {
error();
return nullptr;
}
// Reset the module filter.
M = nullptr;
}
// Make sure we /used/ the last module filter we got.
// This catches the case where the last path piece we saw was an Extension
// path piece, which is not a valid way to end a path. (Cross-references to
// extensions are not allowed because they cannot be uniquely named.)
if (M) {
error();
return nullptr;
}
// When all is said and done, we should have a single value here to return.
if (values.size() != 1) {
error();
return nullptr;
}
return values.front();
}
Identifier ModuleFile::getIdentifier(IdentifierID IID) {
if (IID == 0)
return Identifier();
size_t rawID = IID - NUM_SPECIAL_MODULES;
assert(rawID < Identifiers.size() && "invalid identifier ID");
auto identRecord = Identifiers[rawID];
if (identRecord.Offset == 0)
return identRecord.Ident;
assert(!IdentifierData.empty() && "no identifier data in module");
StringRef rawStrPtr = IdentifierData.substr(identRecord.Offset);
size_t terminatorOffset = rawStrPtr.find('\0');
assert(terminatorOffset != StringRef::npos &&
"unterminated identifier string data");
return getContext().getIdentifier(rawStrPtr.slice(0, terminatorOffset));
}
DeclContext *ModuleFile::getDeclContext(DeclID DID) {
if (DID == 0)
return FileContext;
Decl *D = getDecl(DID);
if (auto ND = dyn_cast<NominalTypeDecl>(D))
return ND;
if (auto ED = dyn_cast<ExtensionDecl>(D))
return ED;
if (auto AFD = dyn_cast<AbstractFunctionDecl>(D))
return AFD;
llvm_unreachable("unknown DeclContext kind");
}
Module *ModuleFile::getModule(ModuleID MID) {
if (MID < NUM_SPECIAL_MODULES) {
switch (static_cast<SpecialModuleID>(static_cast<uint8_t>(MID))) {
case BUILTIN_MODULE_ID:
return getContext().TheBuiltinModule;
case CURRENT_MODULE_ID:
return FileContext->getParentModule();
case OBJC_HEADER_MODULE_ID: {
auto clangImporter =
static_cast<ClangImporter *>(getContext().getClangModuleLoader());
return clangImporter->getImportedHeaderModule();
}
case NUM_SPECIAL_MODULES:
llvm_unreachable("implementation detail only");
}
}
return getModule(getIdentifier(MID));
}
Module *ModuleFile::getModule(Identifier name) {
if (name.empty())
return getContext().TheBuiltinModule;
// FIXME: duplicated from NameBinder::getModule
// FIXME: provide a real source location.
if (name == FileContext->getParentModule()->Name) {
if (!ShadowedModule) {
auto importer = getContext().getClangModuleLoader();
assert(importer && "no way to import shadowed module");
ShadowedModule = importer->loadModule(SourceLoc(),
std::make_pair(name, SourceLoc()));
}
return ShadowedModule;
}
// FIXME: provide a real source location.
return getContext().getModule(std::make_pair(name, SourceLoc()));
}
/// Translate from the Serialization assocativity enum values to the AST
/// strongly-typed enum.
///
/// The former is guaranteed to be stable, but may not reflect this version of
/// the AST.
static Optional<swift::Associativity> getActualAssociativity(uint8_t assoc) {
switch (assoc) {
case serialization::Associativity::LeftAssociative:
return swift::Associativity::Left;
case serialization::Associativity::RightAssociative:
return swift::Associativity::Right;
case serialization::Associativity::NonAssociative:
return swift::Associativity::None;
default:
return Nothing;
}
}
static Optional<swift::StaticSpellingKind>
getActualStaticSpellingKind(uint8_t raw) {
switch (serialization::StaticSpellingKind(raw)) {
case serialization::StaticSpellingKind::None:
return swift::StaticSpellingKind::None;
case serialization::StaticSpellingKind::KeywordStatic:
return swift::StaticSpellingKind::KeywordStatic;
case serialization::StaticSpellingKind::KeywordClass:
return swift::StaticSpellingKind::KeywordClass;
}
return Nothing;
}
static bool isDeclAttrRecord(unsigned ID) {
using namespace decls_block;
switch (ID) {
#define DECL_ATTR(NAME, CLASS, ...) \
case CLASS##_DECL_ATTR: return true;
#define VIRTUAL_DECL_ATTR(NAME, CLASS, ...)
#include "swift/Serialization/DeclTypeRecordNodes.def"
default: return false;
}
}
static Optional<swift::CtorInitializerKind>
getActualCtorInitializerKind(uint8_t raw) {
switch (serialization::CtorInitializerKind(raw)) {
case serialization::Designated:
return swift::CtorInitializerKind::Designated;
case serialization::Convenience:
return swift::CtorInitializerKind::Convenience;
}
return Nothing;
}
Decl *ModuleFile::getDecl(DeclID DID, Optional<DeclContext *> ForcedContext) {
if (DID == 0)
return nullptr;
assert(DID <= Decls.size() && "invalid decl ID");
auto &declOrOffset = Decls[DID-1];
if (declOrOffset.isComplete())
return declOrOffset;
BCOffsetRAII restoreOffset(DeclTypeCursor);
DeclTypeCursor.JumpToBit(declOrOffset);
auto entry = DeclTypeCursor.advance();
if (entry.Kind != llvm::BitstreamEntry::Record) {
// We don't know how to serialize decls represented by sub-blocks.
error();
return nullptr;
}
ASTContext &ctx = getContext();
SmallVector<uint64_t, 64> scratch;
StringRef blobData;
// Read the attributes (if any).
DeclAttribute *DAttrs = nullptr;
DeclAttribute **AttrsNext = &DAttrs;
auto AddAttribute = [&](DeclAttribute *Attr) {
// Advance the linked list.
*AttrsNext = Attr;
AttrsNext = Attr->getMutableNext();
};
unsigned recordID;
while (true) {
if (entry.Kind != llvm::BitstreamEntry::Record) {
// We don't know how to serialize decls represented by sub-blocks.
error();
return nullptr;
}
recordID = DeclTypeCursor.readRecord(entry.ID, scratch, &blobData);
if (isDeclAttrRecord(recordID)) {
DeclAttribute *Attr = nullptr;
switch (recordID) {
case decls_block::Asmname_DECL_ATTR:
bool isImplicit;
serialization::decls_block::AsmnameDeclAttrLayout::readRecord(
scratch, isImplicit);
Attr = new (ctx) AsmnameAttr(blobData, isImplicit);
break;
case decls_block::Availability_DECL_ATTR: {
bool isImplicit;
bool isUnavailable;
unsigned platformSize;
unsigned messageSize;
serialization::decls_block::AvailabilityDeclAttrLayout::readRecord(
scratch, isImplicit, isUnavailable, platformSize, messageSize);
StringRef platform = blobData.substr(0, platformSize);
blobData = blobData.drop_front(platformSize);
StringRef message = blobData;
Attr = new (ctx) AvailabilityAttr(SourceLoc(), SourceRange(), platform,
message, isUnavailable, isImplicit);
break;
}
case decls_block::ObjC_DECL_ATTR: {
bool isImplicit;
uint64_t numArgs;
ArrayRef<uint64_t> rawPieceIDs;
serialization::decls_block::ObjCDeclAttrLayout::readRecord(
scratch, isImplicit, numArgs, rawPieceIDs);
SmallVector<Identifier, 4> pieces;
for (auto pieceID : rawPieceIDs)
pieces.push_back(getIdentifier(pieceID));
if (numArgs == 0)
Attr = ObjCAttr::create(ctx, Nothing);
else
Attr = ObjCAttr::create(ctx, ObjCSelector(ctx, numArgs-1, pieces));
break;
}
#define SIMPLE_DECL_ATTR(NAME, CLASS, ...) \
case decls_block::CLASS##_DECL_ATTR: { \
bool isImplicit; \
serialization::decls_block::CLASS##DeclAttrLayout::readRecord( \
scratch, isImplicit); \
Attr = new (ctx) CLASS##Attr(isImplicit); \
break; \
}
#include "swift/AST/Attr.def"
default:
// We don't know how to deserialize this kind of attribute.
error();
return nullptr;
}
if (!Attr)
return nullptr;
AddAttribute(Attr);
// Advance bitstream cursor to the next record.
entry = DeclTypeCursor.advance();
// Prepare to read the next record.
scratch.clear();
continue;
}
break;
}
PrettyDeclDeserialization stackTraceEntry(
declOrOffset, DID, static_cast<decls_block::RecordKind>(recordID));
switch (recordID) {
case decls_block::TYPE_ALIAS_DECL: {
IdentifierID nameID;
DeclID contextID;
TypeID underlyingTypeID, interfaceTypeID;
bool isImplicit;
decls_block::TypeAliasLayout::readRecord(scratch, nameID, contextID,
underlyingTypeID, interfaceTypeID,
isImplicit);
auto DC = ForcedContext ? *ForcedContext : getDeclContext(contextID);
auto underlyingType = TypeLoc::withoutLoc(getType(underlyingTypeID));
if (declOrOffset.isComplete())
return declOrOffset;
auto alias = new (ctx) TypeAliasDecl(SourceLoc(), getIdentifier(nameID),
SourceLoc(), underlyingType, DC);
declOrOffset = alias;
if (auto interfaceType = getType(interfaceTypeID))
alias->setInterfaceType(interfaceType);
if (isImplicit)
alias->setImplicit();
alias->setCheckedInheritanceClause();
break;
}
case decls_block::GENERIC_TYPE_PARAM_DECL: {
IdentifierID nameID;
DeclID contextID;
bool isImplicit;
unsigned depth;
unsigned index;
TypeID superclassID;
TypeID archetypeID;
ArrayRef<uint64_t> rawProtocolIDs;
decls_block::GenericTypeParamDeclLayout::readRecord(scratch, nameID,
contextID,
isImplicit,
depth,
index,
superclassID,
archetypeID,
rawProtocolIDs);
auto DC = ForcedContext ? *ForcedContext : getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto genericParam = new (ctx) GenericTypeParamDecl(DC,
getIdentifier(nameID),
SourceLoc(),
depth,
index);
declOrOffset = genericParam;
if (isImplicit)
genericParam->setImplicit();
genericParam->setSuperclass(getType(superclassID));
genericParam->setArchetype(getType(archetypeID)->castTo<ArchetypeType>());
auto protos = ctx.Allocate<ProtocolDecl *>(rawProtocolIDs.size());
for_each(protos, rawProtocolIDs, [this](ProtocolDecl *&p, uint64_t rawID) {
p = cast<ProtocolDecl>(getDecl(rawID));
});
genericParam->setProtocols(protos);
genericParam->setCheckedInheritanceClause();
break;
}
case decls_block::ASSOCIATED_TYPE_DECL: {
IdentifierID nameID;
DeclID contextID;
TypeID superclassID;
TypeID archetypeID;
TypeID defaultDefinitionID;
bool isImplicit;
ArrayRef<uint64_t> rawProtocolIDs;
decls_block::AssociatedTypeDeclLayout::readRecord(scratch, nameID,
contextID,
superclassID,
archetypeID,
defaultDefinitionID,
isImplicit,
rawProtocolIDs);
auto DC = ForcedContext ? *ForcedContext : getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto assocType = new (ctx) AssociatedTypeDecl(DC, SourceLoc(),
getIdentifier(nameID),
SourceLoc(), this,
defaultDefinitionID);
declOrOffset = assocType;
assocType->setSuperclass(getType(superclassID));
assocType->setArchetype(getType(archetypeID)->castTo<ArchetypeType>());
if (isImplicit)
assocType->setImplicit();
auto protos = ctx.Allocate<ProtocolDecl *>(rawProtocolIDs.size());
for_each(protos, rawProtocolIDs, [this](ProtocolDecl *&p, uint64_t rawID) {
p = cast<ProtocolDecl>(getDecl(rawID));
});
assocType->setProtocols(protos);
assocType->setCheckedInheritanceClause();
break;
}
case decls_block::STRUCT_DECL: {
IdentifierID nameID;
DeclID contextID;
bool isImplicit;
ArrayRef<uint64_t> rawProtocolIDs;
decls_block::StructLayout::readRecord(scratch, nameID, contextID,
isImplicit, rawProtocolIDs);
auto DC = getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto genericParams = maybeReadGenericParams(DC, DeclTypeCursor);
if (declOrOffset.isComplete())
return declOrOffset;
auto theStruct = new (ctx) StructDecl(SourceLoc(), getIdentifier(nameID),
SourceLoc(), { }, genericParams, DC);
declOrOffset = theStruct;
if (isImplicit)
theStruct->setImplicit();
if (genericParams) {
SmallVector<GenericTypeParamType *, 4> paramTypes;
for (auto &genericParam : *theStruct->getGenericParams()) {
paramTypes.push_back(genericParam.getAsTypeParam()->getDeclaredType()
->castTo<GenericTypeParamType>());
}
// Read the generic requirements.
SmallVector<Requirement, 4> requirements;
readGenericRequirements(requirements);
auto sig = GenericSignature::get(paramTypes, requirements);
theStruct->setGenericSignature(sig);
}
theStruct->computeType();
auto protocols = ctx.Allocate<ProtocolDecl *>(rawProtocolIDs.size());
for_each(protocols, rawProtocolIDs, [this](ProtocolDecl *&p,
uint64_t rawID) {
p = cast<ProtocolDecl>(getDecl(rawID));
});
theStruct->setProtocols(protocols);
theStruct->setMemberLoader(this, DeclTypeCursor.GetCurrentBitNo());
skipRecord(DeclTypeCursor, decls_block::DECL_CONTEXT);
theStruct->setConformanceLoader(this, DeclTypeCursor.GetCurrentBitNo());
theStruct->setCheckedInheritanceClause();
break;
}
case decls_block::CONSTRUCTOR_DECL: {
DeclID parentID;
bool isImplicit, isObjC, isTransparent;
uint8_t storedInitKind;
TypeID signatureID;
TypeID interfaceID;
DeclID overriddenID;
ArrayRef<uint64_t> argNameIDs;
decls_block::ConstructorLayout::readRecord(scratch, parentID, isImplicit,
isObjC, isTransparent,
storedInitKind,
signatureID, interfaceID,
overriddenID, argNameIDs);
auto parent = getDeclContext(parentID);
if (declOrOffset.isComplete())
return declOrOffset;
auto genericParams = maybeReadGenericParams(parent, DeclTypeCursor);
if (declOrOffset.isComplete())
return declOrOffset;
// Resolve the name ids.
SmallVector<Identifier, 2> argNames;
for (auto argNameID : argNameIDs)
argNames.push_back(getIdentifier(argNameID));
DeclName name(ctx, ctx.Id_init, argNames);
auto ctor = new (ctx) ConstructorDecl(name, SourceLoc(),
/*bodyParams=*/nullptr, nullptr,
genericParams, parent);
declOrOffset = ctor;
Pattern *bodyParams0 = maybeReadPattern();
Pattern *bodyParams1 = maybeReadPattern();
assert(bodyParams0&&bodyParams1 && "missing body patterns for constructor");
ctor->setBodyParams(bodyParams0, bodyParams1);
// This must be set after recording the constructor in the map.
// A polymorphic constructor type needs to refer to the constructor to get
// its generic parameters.
ctor->setType(getType(signatureID));
if (auto interfaceType = getType(interfaceID))
ctor->setInterfaceType(interfaceType);
// Set the initializer type of the constructor.
auto allocType = ctor->getType();
auto selfTy = allocType->castTo<AnyFunctionType>()->getInput()
->castTo<MetatypeType>()->getInstanceType();
if (auto polyFn = allocType->getAs<PolymorphicFunctionType>()) {
ctor->setInitializerType(
PolymorphicFunctionType::get(selfTy, polyFn->getResult(),
&polyFn->getGenericParams(),
polyFn->getExtInfo()));
} else {
auto fn = allocType->castTo<FunctionType>();
ctor->setInitializerType(FunctionType::get(selfTy,
fn->getResult(),
fn->getExtInfo()));
}
// Set the initializer interface type of the constructor.
allocType = ctor->getInterfaceType();
selfTy = allocType->castTo<AnyFunctionType>()->getInput()
->castTo<MetatypeType>()->getInstanceType();
if (auto polyFn = allocType->getAs<GenericFunctionType>()) {
ctor->setInitializerInterfaceType(
GenericFunctionType::get(polyFn->getGenericSignature(),
selfTy, polyFn->getResult(),
polyFn->getExtInfo()));
} else {
auto fn = allocType->castTo<FunctionType>();
ctor->setInitializerInterfaceType(FunctionType::get(selfTy,
fn->getResult(),
fn->getExtInfo()));
}
if (isImplicit)
ctor->setImplicit();
if (isTransparent)
ctor->getMutableAttrs().setAttr(AK_transparent, SourceLoc());
if (auto initKind = getActualCtorInitializerKind(storedInitKind))
ctor->setInitKind(*initKind);
if (auto overridden
= dyn_cast_or_null<ConstructorDecl>(getDecl(overriddenID)))
ctor->setOverriddenDecl(overridden);
break;
}
case decls_block::VAR_DECL: {
IdentifierID nameID;
DeclID contextID;
bool isImplicit, isObjC, isOptional, isStatic, isLet;
uint8_t StorageKind;
TypeID typeID, interfaceTypeID;
DeclID getterID, setterID, willSetID, didSetID;
DeclID overriddenID;
decls_block::VarLayout::readRecord(scratch, nameID, contextID, isImplicit,
isObjC, isOptional, isStatic,
isLet, StorageKind, typeID,
interfaceTypeID, getterID, setterID,
willSetID, didSetID, overriddenID);
auto DC = ForcedContext ? *ForcedContext : getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto type = getType(typeID);
if (declOrOffset.isComplete())
return declOrOffset;
auto var = new (ctx) VarDecl(isStatic, isLet, SourceLoc(),
getIdentifier(nameID), type, DC);
declOrOffset = var;
if (auto interfaceType = getType(interfaceTypeID))
var->setInterfaceType(interfaceType);
switch ((VarDeclStorageKind)StorageKind) {
case VarDeclStorageKind::Stored: break;
case VarDeclStorageKind::StoredWithTrivialAccessors:
var->makeStoredWithTrivialAccessors(
cast_or_null<FuncDecl>(getDecl(getterID)),
cast_or_null<FuncDecl>(getDecl(setterID)));
break;
case VarDeclStorageKind::Computed:
var->makeComputed(SourceLoc(),
cast_or_null<FuncDecl>(getDecl(getterID)),
cast_or_null<FuncDecl>(getDecl(setterID)),
SourceLoc());
break;
case VarDeclStorageKind::Observing:
var->makeObserving(SourceLoc(),
cast_or_null<FuncDecl>(getDecl(willSetID)),
cast_or_null<FuncDecl>(getDecl(didSetID)),
SourceLoc());
var->setObservingAccessors(cast_or_null<FuncDecl>(getDecl(getterID)),
cast_or_null<FuncDecl>(getDecl(setterID)));
break;
}
if (isImplicit)
var->setImplicit();
if (isOptional)
var->getMutableAttrs().setAttr(AK_optional, SourceLoc());
if (auto overridden = cast_or_null<VarDecl>(getDecl(overriddenID))) {
var->setOverriddenDecl(overridden);
AddAttribute(new (ctx) OverrideAttr(SourceLoc()));
}
break;
}
case decls_block::PARAM_DECL: {
IdentifierID argNameID, paramNameID;
DeclID contextID;
bool isLet;
TypeID typeID, interfaceTypeID;
decls_block::ParamLayout::readRecord(scratch, argNameID, paramNameID,
contextID, isLet, typeID,
interfaceTypeID);
auto DC = ForcedContext ? *ForcedContext : getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto type = getType(typeID);
if (declOrOffset.isComplete())
return declOrOffset;
auto param = new (ctx) ParamDecl(isLet, SourceLoc(),
getIdentifier(argNameID), SourceLoc(),
getIdentifier(paramNameID), type, DC);
declOrOffset = param;
if (auto interfaceType = getType(interfaceTypeID))
param->setInterfaceType(interfaceType);
break;
}
case decls_block::FUNC_DECL: {
DeclID contextID;
bool isImplicit;
bool isStatic;
uint8_t RawStaticSpelling;
bool isAssignmentOrConversion;
bool isObjC, isTransparent, isMutating, hasDynamicSelf;
bool isOptional;
unsigned numParamPatterns;
TypeID signatureID;
TypeID interfaceTypeID;
DeclID associatedDeclID;
DeclID overriddenID;
DeclID accessorStorageDeclID;
bool hasCompoundName;
ArrayRef<uint64_t> nameIDs;
decls_block::FuncLayout::readRecord(scratch, contextID, isImplicit,
isStatic, RawStaticSpelling,
isAssignmentOrConversion,
isObjC, isTransparent,
isMutating, hasDynamicSelf, isOptional,
numParamPatterns, signatureID,
interfaceTypeID, associatedDeclID,
overriddenID, accessorStorageDeclID,
hasCompoundName, nameIDs);
// Resolve the name ids.
SmallVector<Identifier, 2> names;
for (auto nameID : nameIDs)
names.push_back(getIdentifier(nameID));
auto DC = getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
// Read generic params before reading the type, because the type may
// reference generic parameters, and we want them to have a dummy
// DeclContext for now.
GenericParamList *genericParams = maybeReadGenericParams(DC, DeclTypeCursor);
auto StaticSpelling = getActualStaticSpellingKind(RawStaticSpelling);
if (!StaticSpelling.hasValue()) {
error();
return nullptr;
}
if (declOrOffset.isComplete())
return declOrOffset;
DeclName name;
if (!names.empty()) {
if (hasCompoundName)
name = DeclName(ctx, names[0],
llvm::makeArrayRef(names.begin() + 1, names.end()));
else
name = DeclName(names[0]);
}
auto fn = FuncDecl::createDeserialized(
ctx, SourceLoc(), StaticSpelling.getValue(), SourceLoc(), name,
SourceLoc(), genericParams, /*type=*/nullptr, numParamPatterns, DC);
declOrOffset = fn;
if (Decl *associated = getDecl(associatedDeclID)) {
if (auto op = dyn_cast<OperatorDecl>(associated)) {
fn->setOperatorDecl(op);
if (isa<PrefixOperatorDecl>(op))
fn->getMutableAttrs().setAttr(AK_prefix, SourceLoc());
else if (isa<PostfixOperatorDecl>(op))
fn->getMutableAttrs().setAttr(AK_postfix, SourceLoc());
// Note that an explicit @infix is not required.
}
// Otherwise, unknown associated decl kind.
}
// This must be set after recording the constructor in the map.
// A polymorphic constructor type needs to refer to the constructor to get
// its generic parameters.
auto signature = getType(signatureID)->castTo<AnyFunctionType>();
fn->setType(signature);
// Set the interface type.
if (auto interfaceType = getType(interfaceTypeID))
fn->setInterfaceType(interfaceType);
SmallVector<Pattern *, 16> patternBuf;
while (Pattern *pattern = maybeReadPattern())
patternBuf.push_back(pattern);
assert(!patternBuf.empty());
assert((patternBuf.size() == numParamPatterns) &&
"incorrect number of parameters");
ArrayRef<Pattern *> patterns(patternBuf);
fn->setDeserializedSignature(patterns,
TypeLoc::withoutLoc(signature->getResult()));
if (auto overridden = cast_or_null<FuncDecl>(getDecl(overriddenID))) {
fn->setOverriddenDecl(overridden);
AddAttribute(new (ctx) OverrideAttr(SourceLoc()));
}
fn->setStatic(isStatic);
if (isImplicit)
fn->setImplicit();
if (isAssignmentOrConversion) {
assert(!fn->isOperator());
fn->getMutableAttrs().setAttr(AK_conversion, SourceLoc());
}
if (isTransparent)
fn->getMutableAttrs().setAttr(AK_transparent, SourceLoc());
fn->setMutating(isMutating);
fn->setDynamicSelf(hasDynamicSelf);
if (isOptional)
fn->getMutableAttrs().setAttr(AK_optional, SourceLoc());
// If we are an accessor on a var or subscript, make sure it is deserialized
// too.
getDecl(accessorStorageDeclID);
break;
}
case decls_block::PATTERN_BINDING_DECL: {
DeclID contextID;
bool isImplicit;
bool isStatic;
uint8_t RawStaticSpelling;
decls_block::PatternBindingLayout::readRecord(scratch, contextID,
isImplicit,
isStatic,
RawStaticSpelling);
Pattern *pattern = maybeReadPattern();
assert(pattern);
auto StaticSpelling = getActualStaticSpellingKind(RawStaticSpelling);
if (!StaticSpelling.hasValue()) {
error();
return nullptr;
}
auto binding = new (ctx) PatternBindingDecl(
SourceLoc(), StaticSpelling.getValue(), SourceLoc(), pattern,
/*init=*/nullptr,
/*conditional=*/false, getDeclContext(contextID));
declOrOffset = binding;
binding->setStatic(isStatic);
if (isImplicit)
binding->setImplicit();
break;
}
case decls_block::PROTOCOL_DECL: {
IdentifierID nameID;
DeclID contextID;
bool isImplicit, isObjC;
ArrayRef<uint64_t> protocolIDs;
decls_block::ProtocolLayout::readRecord(scratch, nameID, contextID,
isImplicit, isObjC,
protocolIDs);
auto DC = getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto proto = new (ctx) ProtocolDecl(DC, SourceLoc(), SourceLoc(),
getIdentifier(nameID), { });
declOrOffset = proto;
if (auto genericParams = maybeReadGenericParams(DC, DeclTypeCursor)) {
proto->setGenericParams(genericParams);
SmallVector<GenericTypeParamType *, 4> paramTypes;
for (auto &genericParam : *proto->getGenericParams()) {
paramTypes.push_back(genericParam.getAsTypeParam()->getDeclaredType()
->castTo<GenericTypeParamType>());
}
// Read the generic requirements.
SmallVector<Requirement, 4> requirements;
readGenericRequirements(requirements);
auto sig = GenericSignature::get(paramTypes, requirements);
proto->setGenericSignature(sig);
}
if (isImplicit)
proto->setImplicit();
proto->computeType();
// Deserialize the list of protocols.
auto inherited = ctx.Allocate<ProtocolDecl *>(protocolIDs.size());
for_each(inherited, protocolIDs, [this](ProtocolDecl *&p, uint64_t rawID) {
p = cast<ProtocolDecl>(getDecl(rawID));
});
proto->setProtocols(inherited);
proto->setMemberLoader(this, DeclTypeCursor.GetCurrentBitNo());
proto->setCheckedInheritanceClause();
proto->setCircularityCheck(CircularityCheck::Checked);
break;
}
case decls_block::PREFIX_OPERATOR_DECL: {
IdentifierID nameID;
DeclID contextID;
decls_block::PrefixOperatorLayout::readRecord(scratch, nameID, contextID);
declOrOffset = new (ctx) PrefixOperatorDecl(getDeclContext(contextID),
SourceLoc(), SourceLoc(),
getIdentifier(nameID),
SourceLoc(), SourceLoc(),
SourceLoc());
break;
}
case decls_block::POSTFIX_OPERATOR_DECL: {
IdentifierID nameID;
DeclID contextID;
decls_block::PostfixOperatorLayout::readRecord(scratch, nameID, contextID);
declOrOffset = new (ctx) PostfixOperatorDecl(getDeclContext(contextID),
SourceLoc(), SourceLoc(),
getIdentifier(nameID),
SourceLoc(), SourceLoc(),
SourceLoc());
break;
}
case decls_block::INFIX_OPERATOR_DECL: {
IdentifierID nameID;
DeclID contextID;
uint8_t rawAssociativity;
unsigned precedence;
decls_block::InfixOperatorLayout::readRecord(scratch, nameID, contextID,
rawAssociativity, precedence);
auto associativity = getActualAssociativity(rawAssociativity);
if (!associativity.hasValue()) {
error();
return nullptr;
}
InfixData infixData(precedence, associativity.getValue());
declOrOffset = new (ctx) InfixOperatorDecl(getDeclContext(contextID),
SourceLoc(), SourceLoc(),
getIdentifier(nameID),
SourceLoc(), SourceLoc(),
SourceLoc(), SourceLoc(),
SourceLoc(), SourceLoc(),
SourceLoc(), infixData);
break;
}
case decls_block::CLASS_DECL: {
IdentifierID nameID;
DeclID contextID;
bool isImplicit, isObjC, attrRequiresStoredPropertyInits;
bool requiresStoredPropertyInits;
bool foreign;
TypeID superclassID;
ArrayRef<uint64_t> rawProtocolIDs;
decls_block::ClassLayout::readRecord(scratch, nameID, contextID,
isImplicit, isObjC,
attrRequiresStoredPropertyInits,
requiresStoredPropertyInits,
foreign,
superclassID, rawProtocolIDs);
auto DC = getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto genericParams = maybeReadGenericParams(DC, DeclTypeCursor);
if (declOrOffset.isComplete())
return declOrOffset;
auto theClass = new (ctx) ClassDecl(SourceLoc(), getIdentifier(nameID),
SourceLoc(), { }, genericParams, DC);
declOrOffset = theClass;
theClass->setAddedImplicitInitializers();
if (isImplicit)
theClass->setImplicit();
if (superclassID)
theClass->setSuperclass(getType(superclassID));
if (attrRequiresStoredPropertyInits)
theClass->getMutableAttrs().setAttr(AK_requires_stored_property_inits,
SourceLoc());
if (requiresStoredPropertyInits)
theClass->setRequiresStoredPropertyInits(true);
if (foreign)
theClass->setForeign();
if (genericParams) {
SmallVector<GenericTypeParamType *, 4> paramTypes;
for (auto &genericParam : *theClass->getGenericParams()) {
paramTypes.push_back(genericParam.getAsTypeParam()->getDeclaredType()
->castTo<GenericTypeParamType>());
}
// Read the generic requirements.
SmallVector<Requirement, 4> requirements;
readGenericRequirements(requirements);
GenericSignature *sig = GenericSignature::get(paramTypes, requirements);
theClass->setGenericSignature(sig);
}
theClass->computeType();
auto protocols = ctx.Allocate<ProtocolDecl *>(rawProtocolIDs.size());
for_each(protocols, rawProtocolIDs, [this](ProtocolDecl *&p,
uint64_t rawID) {
p = cast<ProtocolDecl>(getDecl(rawID));
});
theClass->setProtocols(protocols);
theClass->setMemberLoader(this, DeclTypeCursor.GetCurrentBitNo());
theClass->setHasDestructor();
skipRecord(DeclTypeCursor, decls_block::DECL_CONTEXT);
theClass->setConformanceLoader(this, DeclTypeCursor.GetCurrentBitNo());
theClass->setCheckedInheritanceClause();
theClass->setCircularityCheck(CircularityCheck::Checked);
break;
}
case decls_block::ENUM_DECL: {
IdentifierID nameID;
DeclID contextID;
bool isImplicit;
TypeID rawTypeID;
ArrayRef<uint64_t> rawProtocolIDs;
decls_block::EnumLayout::readRecord(scratch, nameID, contextID,
isImplicit, rawTypeID,
rawProtocolIDs);
auto DC = getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto genericParams = maybeReadGenericParams(DC, DeclTypeCursor);
if (declOrOffset.isComplete())
return declOrOffset;
auto theEnum = new (ctx) EnumDecl(SourceLoc(), getIdentifier(nameID),
SourceLoc(), { }, genericParams, DC);
declOrOffset = theEnum;
if (isImplicit)
theEnum->setImplicit();
theEnum->setRawType(getType(rawTypeID));
if (genericParams) {
SmallVector<GenericTypeParamType *, 4> paramTypes;
for (auto &genericParam : *theEnum->getGenericParams()) {
paramTypes.push_back(genericParam.getAsTypeParam()->getDeclaredType()
->castTo<GenericTypeParamType>());
}
// Read the generic requirements.
SmallVector<Requirement, 4> requirements;
readGenericRequirements(requirements);
GenericSignature *sig = GenericSignature::get(paramTypes, requirements);
theEnum->setGenericSignature(sig);
}
theEnum->computeType();
auto protocols = ctx.Allocate<ProtocolDecl *>(rawProtocolIDs.size());
for_each(protocols, rawProtocolIDs, [this](ProtocolDecl *&p,
uint64_t rawID) {
p = cast<ProtocolDecl>(getDecl(rawID));
});
theEnum->setProtocols(protocols);
theEnum->setMemberLoader(this, DeclTypeCursor.GetCurrentBitNo());
skipRecord(DeclTypeCursor, decls_block::DECL_CONTEXT);
theEnum->setConformanceLoader(this, DeclTypeCursor.GetCurrentBitNo());
theEnum->setCheckedInheritanceClause();
break;
}
case decls_block::ENUM_ELEMENT_DECL: {
IdentifierID nameID;
DeclID contextID;
TypeID argTypeID, ctorTypeID, interfaceTypeID;
bool isImplicit;
decls_block::EnumElementLayout::readRecord(scratch, nameID, contextID,
argTypeID, ctorTypeID,
interfaceTypeID, isImplicit);
DeclContext *DC = getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto argTy = getType(argTypeID);
if (declOrOffset.isComplete())
return declOrOffset;
// FIXME: Deserialize the literal raw value, if any.
auto elem = new (ctx) EnumElementDecl(SourceLoc(),
getIdentifier(nameID),
TypeLoc::withoutLoc(argTy),
SourceLoc(),
nullptr,
DC);
declOrOffset = elem;
elem->setType(getType(ctorTypeID));
if (auto interfaceType = getType(interfaceTypeID))
elem->setInterfaceType(interfaceType);
if (isImplicit)
elem->setImplicit();
break;
}
case decls_block::SUBSCRIPT_DECL: {
DeclID contextID;
bool isImplicit, isObjC, isOptional;
TypeID declTypeID, elemTypeID, interfaceTypeID;
DeclID getterID, setterID;
DeclID overriddenID;
ArrayRef<uint64_t> argNameIDs;
decls_block::SubscriptLayout::readRecord(scratch, contextID, isImplicit,
isObjC, isOptional,
declTypeID, elemTypeID,
interfaceTypeID,
getterID, setterID,
overriddenID,
argNameIDs);
auto Getter = cast_or_null<FuncDecl>(getDecl(getterID));
auto Setter = cast_or_null<FuncDecl>(getDecl(setterID));
auto DC = getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
Pattern *indices = maybeReadPattern();
assert(indices);
auto elemTy = TypeLoc::withoutLoc(getType(elemTypeID));
if (declOrOffset.isComplete())
return declOrOffset;
// Resolve the name ids.
SmallVector<Identifier, 2> argNames;
for (auto argNameID : argNameIDs)
argNames.push_back(getIdentifier(argNameID));
DeclName name(ctx, ctx.Id_subscript, argNames);
auto subscript = new (ctx) SubscriptDecl(name, SourceLoc(), indices,
SourceLoc(), elemTy, DC);
declOrOffset = subscript;
subscript->setAccessors(SourceRange(), Getter, Setter);
subscript->setType(getType(declTypeID));
if (auto interfaceType = getType(interfaceTypeID))
subscript->setInterfaceType(interfaceType);
if (isImplicit)
subscript->setImplicit();
if (isOptional)
subscript->getMutableAttrs().setAttr(AK_optional, SourceLoc());
if (auto overridden = cast_or_null<SubscriptDecl>(getDecl(overriddenID))) {
subscript->setOverriddenDecl(overridden);
AddAttribute(new (ctx) OverrideAttr(SourceLoc()));
}
break;
}
case decls_block::EXTENSION_DECL: {
TypeID baseID;
DeclID contextID;
bool isImplicit;
ArrayRef<uint64_t> rawProtocolIDs;
decls_block::ExtensionLayout::readRecord(scratch, baseID, contextID,
isImplicit, rawProtocolIDs);
auto DC = getDeclContext(contextID);
if (declOrOffset.isComplete())
return declOrOffset;
auto baseTy = TypeLoc::withoutLoc(getType(baseID));
if (declOrOffset.isComplete())
return declOrOffset;
auto extension = new (ctx) ExtensionDecl(SourceLoc(), baseTy, { }, DC);
declOrOffset = extension;
if (isImplicit)
extension->setImplicit();
auto protocols = ctx.Allocate<ProtocolDecl *>(rawProtocolIDs.size());
for_each(protocols, rawProtocolIDs, [this](ProtocolDecl *&p,
uint64_t rawID) {
p = cast<ProtocolDecl>(getDecl(rawID));
});
extension->setProtocols(protocols);
extension->setMemberLoader(this, DeclTypeCursor.GetCurrentBitNo());
skipRecord(DeclTypeCursor, decls_block::DECL_CONTEXT);
extension->setConformanceLoader(this, DeclTypeCursor.GetCurrentBitNo());
baseTy.getType()->getAnyNominal()->addExtension(extension);
extension->setCheckedInheritanceClause();
break;
}
case decls_block::DESTRUCTOR_DECL: {
DeclID parentID;
bool isImplicit, isObjC;
TypeID signatureID;
decls_block::DestructorLayout::readRecord(scratch, parentID, isImplicit,
isObjC, signatureID);
DeclContext *parent = getDeclContext(parentID);
if (declOrOffset.isComplete())
return declOrOffset;
auto dtor = new (ctx) DestructorDecl(ctx.Id_deinit, SourceLoc(),
/*selfpat*/nullptr, parent);
declOrOffset = dtor;
Pattern *selfParams = maybeReadPattern();
assert(selfParams && "Didn't get self pattern?");
dtor->setSelfPattern(selfParams);
dtor->setType(getType(signatureID));
if (isImplicit)
dtor->setImplicit();
break;
}
case decls_block::XREF: {
assert(DAttrs == nullptr);
ModuleID baseModuleID;
uint32_t pathLen;
decls_block::XRefLayout::readRecord(scratch, baseModuleID, pathLen);
declOrOffset = resolveCrossReference(getModule(baseModuleID), pathLen);
break;
}
default:
// We don't know how to deserialize this kind of decl.
error();
return nullptr;
}
// Record the attributes.
if (DAttrs)
declOrOffset.get()->getMutableAttrs().setRawAttributeChain(DAttrs);
return declOrOffset;
}
/// Translate from the Serialization calling convention enum values to the AST
/// strongly-typed enum.
///
/// The former is guaranteed to be stable, but may not reflect this version of
/// the AST.
static Optional<swift::AbstractCC> getActualCC(uint8_t cc) {
switch (cc) {
#define CASE(THE_CC) \
case serialization::AbstractCC::THE_CC: \
return swift::AbstractCC::THE_CC;
CASE(C)
CASE(ObjCMethod)
CASE(Freestanding)
CASE(Method)
CASE(WitnessMethod)
#undef CASE
default:
return Nothing;
}
}
/// Translate from the serialization Ownership enumerators, which are
/// guaranteed to be stable, to the AST ones.
static
Optional<swift::Ownership> getActualOwnership(serialization::Ownership raw) {
switch (raw) {
case serialization::Ownership::Strong: return swift::Ownership::Strong;
case serialization::Ownership::Unmanaged:return swift::Ownership::Unmanaged;
case serialization::Ownership::Unowned: return swift::Ownership::Unowned;
case serialization::Ownership::Weak: return swift::Ownership::Weak;
}
return Nothing;
}
/// Translate from the serialization ParameterConvention enumerators,
/// which are guaranteed to be stable, to the AST ones.
static
Optional<swift::ParameterConvention> getActualParameterConvention(uint8_t raw) {
switch (serialization::ParameterConvention(raw)) {
#define CASE(ID) \
case serialization::ParameterConvention::ID: \
return swift::ParameterConvention::ID;
CASE(Indirect_In)
CASE(Indirect_Out)
CASE(Indirect_Inout)
CASE(Direct_Owned)
CASE(Direct_Unowned)
CASE(Direct_Guaranteed)
#undef CASE
}
return Nothing;
}
/// Translate from the serialization ResultConvention enumerators,
/// which are guaranteed to be stable, to the AST ones.
static
Optional<swift::ResultConvention> getActualResultConvention(uint8_t raw) {
switch (serialization::ResultConvention(raw)) {
#define CASE(ID) \
case serialization::ResultConvention::ID: return swift::ResultConvention::ID;
CASE(Owned)
CASE(Unowned)
CASE(UnownedInnerPointer)
CASE(Autoreleased)
#undef CASE
}
return Nothing;
}
static AnyFunctionType::Representation
getFunctionRepresentation(bool thin, bool blockCompatible) {
// A type cannot be both thin and block-compatible.
assert(!thin || !blockCompatible);
if (thin)
return AnyFunctionType::Representation::Thin;
else if (blockCompatible)
return AnyFunctionType::Representation::Block;
else
return AnyFunctionType::Representation::Thick;
}
Type ModuleFile::getType(TypeID TID) {
if (TID == 0)
return Type();
assert(TID <= Types.size() && "invalid decl ID");
auto &typeOrOffset = Types[TID-1];
if (typeOrOffset.isComplete())
return typeOrOffset;
BCOffsetRAII restoreOffset(DeclTypeCursor);
DeclTypeCursor.JumpToBit(typeOrOffset);
auto entry = DeclTypeCursor.advance();
if (entry.Kind != llvm::BitstreamEntry::Record) {
// We don't know how to serialize types represented by sub-blocks.
error();
return nullptr;
}
ASTContext &ctx = getContext();
SmallVector<uint64_t, 64> scratch;
StringRef blobData;
unsigned recordID = DeclTypeCursor.readRecord(entry.ID, scratch, &blobData);
switch (recordID) {
case decls_block::NAME_ALIAS_TYPE: {
DeclID underlyingID;
decls_block::NameAliasTypeLayout::readRecord(scratch, underlyingID);
auto alias = dyn_cast_or_null<TypeAliasDecl>(getDecl(underlyingID));
if (!alias) {
error();
return nullptr;
}
typeOrOffset = alias->getDeclaredType();
break;
}
case decls_block::NOMINAL_TYPE: {
DeclID declID;
TypeID parentID;
decls_block::NominalTypeLayout::readRecord(scratch, declID, parentID);
Type parentTy = getType(parentID);
// Record the type as soon as possible. Members of a nominal type often
// try to refer back to the type.
auto nominal = cast<NominalTypeDecl>(getDecl(declID));
typeOrOffset = NominalType::get(nominal, parentTy, ctx);
assert(typeOrOffset.isComplete());
break;
}
case decls_block::PAREN_TYPE: {
TypeID underlyingID;
decls_block::ParenTypeLayout::readRecord(scratch, underlyingID);
typeOrOffset = ParenType::get(ctx, getType(underlyingID));
break;
}
case decls_block::TUPLE_TYPE: {
// The tuple record itself is empty. Read all trailing elements.
SmallVector<TupleTypeElt, 8> elements;
while (true) {
auto entry = DeclTypeCursor.advance(AF_DontPopBlockAtEnd);
if (entry.Kind != llvm::BitstreamEntry::Record)
break;
scratch.clear();
unsigned recordID = DeclTypeCursor.readRecord(entry.ID, scratch,
&blobData);
if (recordID != decls_block::TUPLE_TYPE_ELT)
break;
IdentifierID nameID;
TypeID typeID;
uint8_t rawDefArg;
bool isVararg;
decls_block::TupleTypeEltLayout::readRecord(scratch, nameID, typeID,
rawDefArg, isVararg);
DefaultArgumentKind defArg = DefaultArgumentKind::None;
if (auto actualDefArg = getActualDefaultArgKind(rawDefArg))
defArg = *actualDefArg;
elements.push_back({getType(typeID), getIdentifier(nameID), defArg,
isVararg});
}
typeOrOffset = TupleType::get(elements, ctx);
break;
}
case decls_block::FUNCTION_TYPE: {
TypeID inputID;
TypeID resultID;
uint8_t rawCallingConvention;
bool autoClosure;
bool thin;
bool noreturn;
bool blockCompatible;
decls_block::FunctionTypeLayout::readRecord(scratch, inputID, resultID,
rawCallingConvention,
autoClosure, thin,
noreturn,
blockCompatible);
auto callingConvention = getActualCC(rawCallingConvention);
if (!callingConvention.hasValue()) {
error();
return nullptr;
}
auto Info = FunctionType::ExtInfo(callingConvention.getValue(),
getFunctionRepresentation(thin, blockCompatible),
noreturn,
autoClosure);
typeOrOffset = FunctionType::get(getType(inputID), getType(resultID),
Info);
break;
}
case decls_block::EXISTENTIAL_METATYPE_TYPE: {
TypeID instanceID;
uint8_t repr;
decls_block::ExistentialMetatypeTypeLayout::readRecord(scratch,
instanceID, repr);
switch (repr) {
case serialization::MetatypeRepresentation::MR_None:
typeOrOffset = ExistentialMetatypeType::get(getType(instanceID));
break;
case serialization::MetatypeRepresentation::MR_Thin:
error();
break;
case serialization::MetatypeRepresentation::MR_Thick:
typeOrOffset = ExistentialMetatypeType::get(getType(instanceID),
MetatypeRepresentation::Thick);
break;
case serialization::MetatypeRepresentation::MR_ObjC:
typeOrOffset = ExistentialMetatypeType::get(getType(instanceID),
MetatypeRepresentation::ObjC);
break;
default:
error();
break;
}
break;
}
case decls_block::METATYPE_TYPE: {
TypeID instanceID;
uint8_t repr;
decls_block::MetatypeTypeLayout::readRecord(scratch, instanceID, repr);
switch (repr) {
case serialization::MetatypeRepresentation::MR_None:
typeOrOffset = MetatypeType::get(getType(instanceID));
break;
case serialization::MetatypeRepresentation::MR_Thin:
typeOrOffset = MetatypeType::get(getType(instanceID),
MetatypeRepresentation::Thin);
break;
case serialization::MetatypeRepresentation::MR_Thick:
typeOrOffset = MetatypeType::get(getType(instanceID),
MetatypeRepresentation::Thick);
break;
case serialization::MetatypeRepresentation::MR_ObjC:
typeOrOffset = MetatypeType::get(getType(instanceID),
MetatypeRepresentation::ObjC);
break;
default:
error();
break;
}
break;
}
case decls_block::DYNAMIC_SELF_TYPE: {
TypeID selfID;
decls_block::DynamicSelfTypeLayout::readRecord(scratch, selfID);
typeOrOffset = DynamicSelfType::get(getType(selfID), ctx);
break;
}
case decls_block::LVALUE_TYPE: {
TypeID objectTypeID;
decls_block::LValueTypeLayout::readRecord(scratch, objectTypeID);
typeOrOffset = LValueType::get(getType(objectTypeID));
break;
}
case decls_block::INOUT_TYPE: {
TypeID objectTypeID;
decls_block::LValueTypeLayout::readRecord(scratch, objectTypeID);
typeOrOffset = InOutType::get(getType(objectTypeID));
break;
}
case decls_block::REFERENCE_STORAGE_TYPE: {
uint8_t rawOwnership;
TypeID referentTypeID;
decls_block::ReferenceStorageTypeLayout::readRecord(scratch, rawOwnership,
referentTypeID);
auto ownership =
getActualOwnership((serialization::Ownership) rawOwnership);
if (!ownership.hasValue()) {
error();
break;
}
typeOrOffset = ReferenceStorageType::get(getType(referentTypeID),
ownership.getValue(), ctx);
break;
}
case decls_block::ARCHETYPE_TYPE: {
IdentifierID nameID;
bool isPrimary;
TypeID parentOrIndex;
DeclID assocTypeOrProtoID;
TypeID superclassID;
ArrayRef<uint64_t> rawConformanceIDs;
decls_block::ArchetypeTypeLayout::readRecord(scratch, nameID, isPrimary,
parentOrIndex,
assocTypeOrProtoID,
superclassID,
rawConformanceIDs);
ArchetypeType *parent = nullptr;
Type superclass;
Optional<unsigned> index;
SmallVector<ProtocolDecl *, 4> conformances;
if (isPrimary)
index = parentOrIndex;
else
parent = getType(parentOrIndex)->castTo<ArchetypeType>();
ArchetypeType::AssocTypeOrProtocolType assocTypeOrProto;
auto assocTypeOrProtoDecl = getDecl(assocTypeOrProtoID);
if (auto assocType
= dyn_cast_or_null<AssociatedTypeDecl>(assocTypeOrProtoDecl))
assocTypeOrProto = assocType;
else
assocTypeOrProto = cast_or_null<ProtocolDecl>(assocTypeOrProtoDecl);
superclass = getType(superclassID);
for (DeclID protoID : rawConformanceIDs)
conformances.push_back(cast<ProtocolDecl>(getDecl(protoID)));
// See if we triggered deserialization through our conformances.
if (typeOrOffset.isComplete())
break;
auto archetype = ArchetypeType::getNew(ctx, parent, assocTypeOrProto,
getIdentifier(nameID), conformances,
superclass, index);
typeOrOffset = archetype;
// Read the associated type names.
auto entry = DeclTypeCursor.advance();
if (entry.Kind != llvm::BitstreamEntry::Record) {
error();
break;
}
scratch.clear();
unsigned kind = DeclTypeCursor.readRecord(entry.ID, scratch);
if (kind != decls_block::ARCHETYPE_NESTED_TYPE_NAMES) {
error();
break;
}
ArrayRef<uint64_t> rawNameIDs;
decls_block::ArchetypeNestedTypeNamesLayout::readRecord(scratch,
rawNameIDs);
// Read whether the associated types are dependent archetypes.
entry = DeclTypeCursor.advance();
if (entry.Kind != llvm::BitstreamEntry::Record) {
error();
break;
}
SmallVector<uint64_t, 16> scratch2;
kind = DeclTypeCursor.readRecord(entry.ID, scratch2);
if (kind != decls_block::ARCHETYPE_NESTED_TYPES_ARE_ARCHETYPES) {
error();
break;
}
ArrayRef<uint64_t> areArchetypes;
decls_block::ArchetypeNestedTypesAreArchetypesLayout
::readRecord(scratch2, areArchetypes);
// Read the associated type ids.
entry = DeclTypeCursor.advance();
if (entry.Kind != llvm::BitstreamEntry::Record) {
error();
break;
}
SmallVector<uint64_t, 16> scratch3;
kind = DeclTypeCursor.readRecord(entry.ID, scratch3);
if (kind != decls_block::ARCHETYPE_NESTED_TYPES) {
error();
break;
}
ArrayRef<uint64_t> rawTypeIDs;
decls_block::ArchetypeNestedTypesLayout::readRecord(scratch3, rawTypeIDs);
// Build the nested types array.
SmallVector<std::pair<Identifier, ArchetypeType::NestedType>, 4>
nestedTypes;
for_each3(rawNameIDs, areArchetypes, rawTypeIDs,
[&](IdentifierID nameID, bool isArchetype, TypeID nestedID) {
ArchetypeType::NestedType nestedTy = getType(nestedID);
if (isArchetype) {
nestedTy = nestedTy.get<Type>()->castTo<ArchetypeType>();
}
nestedTypes.push_back(std::make_pair(getIdentifier(nameID), nestedTy));
});
archetype->setNestedTypes(ctx, nestedTypes);
break;
}
case decls_block::OPENED_EXISTENTIAL_TYPE: {
TypeID existentialID;
decls_block::OpenedExistentialTypeLayout::readRecord(scratch,
existentialID);
typeOrOffset = ArchetypeType::getOpened(getType(existentialID));
break;
}
case decls_block::GENERIC_TYPE_PARAM_TYPE: {
DeclID declIDOrDepth;
unsigned indexPlusOne;
decls_block::GenericTypeParamTypeLayout::readRecord(scratch, declIDOrDepth,
indexPlusOne);
if (indexPlusOne == 0) {
auto genericParam
= dyn_cast_or_null<GenericTypeParamDecl>(getDecl(declIDOrDepth));
if (!genericParam) {
error();
return nullptr;
}
// See if we triggered deserialization through our conformances.
if (typeOrOffset.isComplete())
break;
typeOrOffset = genericParam->getDeclaredType();
break;
}
typeOrOffset = GenericTypeParamType::get(declIDOrDepth,indexPlusOne-1,ctx);
break;
}
case decls_block::ASSOCIATED_TYPE_TYPE: {
DeclID declID;
decls_block::AssociatedTypeTypeLayout::readRecord(scratch, declID);
auto assocType = dyn_cast_or_null<AssociatedTypeDecl>(getDecl(declID));
if (!assocType) {
error();
return nullptr;
}
// See if we triggered deserialization through our conformances.
if (typeOrOffset.isComplete())
break;
typeOrOffset = assocType->getDeclaredType();
break;
}
case decls_block::PROTOCOL_COMPOSITION_TYPE: {
ArrayRef<uint64_t> rawProtocolIDs;
decls_block::ProtocolCompositionTypeLayout::readRecord(scratch,
rawProtocolIDs);
SmallVector<Type, 4> protocols;
for (TypeID protoID : rawProtocolIDs)
protocols.push_back(getType(protoID));
typeOrOffset = ProtocolCompositionType::get(ctx, protocols);
break;
}
case decls_block::SUBSTITUTED_TYPE: {
TypeID originalID, replacementID;
decls_block::SubstitutedTypeLayout::readRecord(scratch, originalID,
replacementID);
typeOrOffset = SubstitutedType::get(getType(originalID),
getType(replacementID),
ctx);
break;
}
case decls_block::DEPENDENT_MEMBER_TYPE: {
TypeID baseID;
DeclID assocTypeID;
decls_block::DependentMemberTypeLayout::readRecord(scratch, baseID,
assocTypeID);
typeOrOffset = DependentMemberType::get(
getType(baseID),
cast<AssociatedTypeDecl>(getDecl(assocTypeID)),
ctx);
break;
}
case decls_block::BOUND_GENERIC_TYPE: {
DeclID declID;
TypeID parentID;
ArrayRef<uint64_t> rawArgumentIDs;
decls_block::BoundGenericTypeLayout::readRecord(scratch, declID, parentID,
rawArgumentIDs);
auto nominal = cast<NominalTypeDecl>(getDecl(declID));
auto parentTy = getType(parentID);
// Check the first ID to decide if we are using indices to the Decl's
// Archetypes.
SmallVector<Type, 8> genericArgs;
if (rawArgumentIDs.size() > 1 && rawArgumentIDs[0] == INT32_MAX) {
for (unsigned i = 1; i < rawArgumentIDs.size(); i++) {
auto index = rawArgumentIDs[i];
genericArgs.push_back(nominal->getGenericParams()
->getAllArchetypes()[index]);
}
} else {
for (TypeID type : rawArgumentIDs)
genericArgs.push_back(getType(type));
}
auto boundTy = BoundGenericType::get(nominal, parentTy, genericArgs);
typeOrOffset = boundTy;
break;
}
case decls_block::POLYMORPHIC_FUNCTION_TYPE: {
TypeID inputID;
TypeID resultID;
DeclID genericContextID;
uint8_t rawCallingConvention;
bool thin;
bool noreturn = false;
//todo add noreturn serialization.
decls_block::PolymorphicFunctionTypeLayout::readRecord(scratch,
inputID,
resultID,
genericContextID,
rawCallingConvention,
thin,
noreturn);
auto callingConvention = getActualCC(rawCallingConvention);
if (!callingConvention.hasValue()) {
error();
return nullptr;
}
GenericParamList *paramList =
maybeGetOrReadGenericParams(genericContextID, FileContext, DeclTypeCursor);
assert(paramList && "missing generic params for polymorphic function");
auto rep = thin
? AnyFunctionType::Representation::Thin
: AnyFunctionType::Representation::Thick;
auto Info = PolymorphicFunctionType::ExtInfo(callingConvention.getValue(),
rep,
noreturn);
typeOrOffset = PolymorphicFunctionType::get(getType(inputID),
getType(resultID),
paramList, Info);
break;
}
case decls_block::GENERIC_FUNCTION_TYPE: {
TypeID inputID;
TypeID resultID;
uint8_t rawCallingConvention;
bool thin;
bool noreturn = false;
ArrayRef<uint64_t> genericParamIDs;
//todo add noreturn serialization.
decls_block::GenericFunctionTypeLayout::readRecord(scratch,
inputID,
resultID,
rawCallingConvention,
thin,
noreturn,
genericParamIDs);
auto callingConvention = getActualCC(rawCallingConvention);
if (!callingConvention.hasValue()) {
error();
return nullptr;
}
// Read the generic parameters.
SmallVector<GenericTypeParamType *, 4> genericParams;
for (auto paramID : genericParamIDs) {
auto param = dyn_cast_or_null<GenericTypeParamType>(
getType(paramID).getPointer());
if (!param) {
error();
break;
}
genericParams.push_back(param);
}
auto rep = thin
? AnyFunctionType::Representation::Thin
: AnyFunctionType::Representation::Thick;
// Read the generic requirements.
SmallVector<Requirement, 4> requirements;
readGenericRequirements(requirements);
auto info = GenericFunctionType::ExtInfo(callingConvention.getValue(),
rep, noreturn);
auto sig = GenericSignature::get(genericParams, requirements);
typeOrOffset = GenericFunctionType::get(sig,
getType(inputID),
getType(resultID),
info);
break;
}
case decls_block::SIL_BLOCK_STORAGE_TYPE: {
TypeID captureID;
decls_block::SILBlockStorageTypeLayout::readRecord(scratch, captureID);
typeOrOffset = SILBlockStorageType::get(getType(captureID)
->getCanonicalType());
break;
}
case decls_block::SIL_FUNCTION_TYPE: {
TypeID interfaceResultID;
uint8_t rawInterfaceResultConvention;
uint8_t rawCallingConvention;
uint8_t rawCalleeConvention;
bool thin, block;
bool noreturn = false;
unsigned numGenericParams;
ArrayRef<uint64_t> paramIDs;
decls_block::SILFunctionTypeLayout::readRecord(scratch,
interfaceResultID,
rawInterfaceResultConvention,
rawCalleeConvention,
rawCallingConvention,
thin,
block,
noreturn,
numGenericParams,
paramIDs);
// Process the ExtInfo.
auto callingConvention = getActualCC(rawCallingConvention);
if (!callingConvention.hasValue()) {
error();
return nullptr;
}
SILFunctionType::ExtInfo extInfo(callingConvention.getValue(),
getFunctionRepresentation(thin, block),
noreturn);
// Process the result.
auto interfaceResultConvention
= getActualResultConvention(rawInterfaceResultConvention);
if (!interfaceResultConvention.hasValue()) {
error();
return nullptr;
}
SILResultInfo interfaceResult(getType(interfaceResultID)->getCanonicalType(),
interfaceResultConvention.getValue());
// Process the parameters.
unsigned numParamIDs = paramIDs.size() - numGenericParams;
SmallVector<SILParameterInfo, 8> allParams;
allParams.reserve(numParamIDs);
for (size_t i = 0, e = numParamIDs; i != e; i += 2) {
auto type = getType(paramIDs[i])->getCanonicalType();
auto convention = getActualParameterConvention(paramIDs[i+1]);
if (!convention.hasValue()) {
error();
return nullptr;
}
SILParameterInfo param(type, convention.getValue());
allParams.push_back(param);
}
// Process the callee convention.
auto calleeConvention = getActualParameterConvention(rawCalleeConvention);
if (!calleeConvention.hasValue()) {
error();
return nullptr;
}
// Process the generic signature parameters.
SmallVector<GenericTypeParamType *, 8> genericParamTypes;
for (auto id : paramIDs.slice(numParamIDs)) {
genericParamTypes.push_back(
cast<GenericTypeParamType>(getType(id)->getCanonicalType()));
}
// Read the generic requirements, if any.
SmallVector<Requirement, 4> requirements;
readGenericRequirements(requirements);
GenericSignature *genericSig = nullptr;
if (!genericParamTypes.empty() || !requirements.empty())
genericSig = GenericSignature::get(genericParamTypes, requirements);
typeOrOffset = SILFunctionType::get(genericSig, extInfo,
calleeConvention.getValue(),
allParams, interfaceResult,
ctx);
break;
}
case decls_block::ARRAY_SLICE_TYPE: {
TypeID baseID;
decls_block::ArraySliceTypeLayout::readRecord(scratch, baseID);
auto sliceTy = ArraySliceType::get(getType(baseID));
typeOrOffset = sliceTy;
break;
}
case decls_block::OPTIONAL_TYPE: {
TypeID baseID;
decls_block::OptionalTypeLayout::readRecord(scratch, baseID);
auto optionalTy = OptionalType::get(getType(baseID));
typeOrOffset = optionalTy;
break;
}
case decls_block::UNCHECKED_OPTIONAL_TYPE: {
TypeID baseID;
decls_block::ImplicitlyUnwrappedOptionalTypeLayout::readRecord(scratch, baseID);
auto optionalTy = ImplicitlyUnwrappedOptionalType::get(getType(baseID));
typeOrOffset = optionalTy;
break;
}
case decls_block::UNBOUND_GENERIC_TYPE: {
DeclID genericID;
TypeID parentID;
decls_block::UnboundGenericTypeLayout::readRecord(scratch,
genericID, parentID);
auto genericDecl = cast<NominalTypeDecl>(getDecl(genericID));
typeOrOffset = UnboundGenericType::get(genericDecl, getType(parentID), ctx);
break;
}
default:
// We don't know how to deserialize this kind of type.
error();
return nullptr;
}
return typeOrOffset;
}
ArrayRef<Decl *> ModuleFile::loadAllMembers(const Decl *D,
uint64_t contextData) {
// FIXME: Add PrettyStackTrace.
BCOffsetRAII restoreOffset(DeclTypeCursor);
DeclTypeCursor.JumpToBit(contextData);
auto result = readMembers();
assert(result && "unable to read members");
return result.getValue();
}
ArrayRef<ProtocolConformance *>
ModuleFile::loadAllConformances(const Decl *D, uint64_t contextData) {
// FIXME: Add PrettyStackTrace.
BCOffsetRAII restoreOffset(DeclTypeCursor);
DeclTypeCursor.JumpToBit(contextData);
Type conformingTy;
if (auto nominal = dyn_cast<NominalTypeDecl>(D))
conformingTy = nominal->getDeclaredTypeInContext();
else
conformingTy = cast<ExtensionDecl>(D)->getDeclaredTypeInContext();
CanType canTy = conformingTy->getCanonicalType();
SmallVector<ProtocolConformance *, 16> conformances;
while (auto conformance = maybeReadConformance(canTy, DeclTypeCursor))
conformances.push_back(conformance.getValue());
return getContext().AllocateCopy(conformances);
}
TypeLoc
ModuleFile::loadAssociatedTypeDefault(const swift::AssociatedTypeDecl *ATD,
uint64_t contextData) {
return TypeLoc::withoutLoc(getType(contextData));
}
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