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[Module file] (De-)serialize inherited protocol conformances.

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Swift SVN r6886
This commit is contained in:
Doug Gregor
2013-08-05 14:29:16 +00:00
parent 8956e856c6
commit 1bd583cdf8
4 changed files with 143 additions and 69 deletions
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112
lib/Serialization/ModuleFile.cpp
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@@ -198,6 +198,47 @@ Pattern *ModuleFile::maybeReadPattern() {
}
}
ProtocolConformance *
ModuleFile::readUnderlyingConformance(ProtocolDecl *proto,
DeclID nominalID,
IdentifierID moduleOrTypeID) {
if (!nominalID) {
// The underlying conformance is in the following record.
return maybeReadConformance(getType(moduleOrTypeID))->second;
}
// Dig out the protocol conformance within the nominal declaration.
auto nominal = cast<NominalTypeDecl>(getDecl(nominalID));
Module *owningModule;
if (moduleOrTypeID == 0)
owningModule = ModuleContext;
else
owningModule = getModule(getIdentifier(moduleOrTypeID-1));
(void)owningModule; // FIXME: Currently only used for checking.
// Search protocols
for (unsigned i = 0, n = nominal->getProtocols().size(); i != n; ++i) {
if (nominal->getProtocols()[i] == proto) {
// FIXME: Eventually, filter by owning module.
assert(nominal->getModuleContext() == owningModule);
return nominal->getConformances()[i];
}
}
// Search extensions.
for (auto ext : nominal->getExtensions()) {
for (unsigned i = 0, n = ext->getProtocols().size(); i != n; ++i) {
if (ext->getProtocols()[i] == proto) {
// FIXME: Eventually, filter by owning module.
assert(ext->getModuleContext() == owningModule);
return ext->getConformances()[i];
}
}
}
llvm_unreachable("Unable to find underlying conformance");
}
Optional<ConformancePair> ModuleFile::maybeReadConformance(Type conformingType){
using namespace decls_block;
@@ -222,8 +263,6 @@ Optional<ConformancePair> ModuleFile::maybeReadConformance(Type conformingType){
break;
case SPECIALIZED_PROTOCOL_CONFORMANCE: {
lastRecordOffset.reset();
DeclID protoID;
DeclID nominalID;
IdentifierID moduleOrTypeID;
@@ -262,51 +301,12 @@ Optional<ConformancePair> ModuleFile::maybeReadConformance(Type conformingType){
}
assert(rawIDIter <= rawIDs.end() && "read too much");
ProtocolConformance *genericConformance
= readUnderlyingConformance(proto, nominalID, moduleOrTypeID);
// Reset the offset RAII to the end of the trailing records.
lastRecordOffset.reset();
ProtocolConformance *genericConformance = nullptr;
if (nominalID) {
// Dig out the protocol conformance within the nominal declaration.
auto nominal = cast<NominalTypeDecl>(getDecl(nominalID));
Module *owningModule;
if (moduleOrTypeID == 0)
owningModule = ModuleContext;
else
owningModule = getModule(getIdentifier(moduleOrTypeID-1));
(void)owningModule; // FIXME: Currently only used for checking.
for (unsigned i = 0, n = nominal->getProtocols().size(); i != n; ++i) {
if (nominal->getProtocols()[i] == proto) {
genericConformance = nominal->getConformances()[i];
// FIXME: Eventually, filter by owning module.
assert(nominal->getModuleContext() == owningModule);
break;
}
}
if (!genericConformance) {
for (auto ext : nominal->getExtensions()) {
for (unsigned i = 0, n = ext->getProtocols().size(); i != n; ++i) {
if (ext->getProtocols()[i] == proto) {
genericConformance = ext->getConformances()[i];
// FIXME: Eventually, filter by owning module.
assert(ext->getModuleContext() == owningModule);
break;
}
}
if (genericConformance)
break;
}
}
} else {
// The generic conformance is in the following record.
genericConformance
= maybeReadConformance(getType(moduleOrTypeID))->second;
}
assert(genericConformance && "Missing generic conformance?");
return { proto,
ctx.getSpecializedConformance(conformingType,
@@ -316,10 +316,28 @@ Optional<ConformancePair> ModuleFile::maybeReadConformance(Type conformingType){
}
case INHERITED_PROTOCOL_CONFORMANCE: {
// FIXME: Does this even make sense?
llvm_unreachable("Not implemented");
}
DeclID protoID;
DeclID nominalID;
IdentifierID moduleOrTypeID;
InheritedProtocolConformanceLayout::readRecord(scratch, protoID,
nominalID,
moduleOrTypeID);
ASTContext &ctx = ModuleContext->Ctx;
auto proto = cast<ProtocolDecl>(getDecl(protoID));
ProtocolConformance *inheritedConformance
= readUnderlyingConformance(proto, nominalID, moduleOrTypeID);
// Reset the offset RAII to the end of the trailing records.
lastRecordOffset.reset();
assert(inheritedConformance && "Missing generic conformance?");
return { proto,
ctx.getInheritedConformance(conformingType,
inheritedConformance) };
}
// Not a protocol conformance.
default:
return Nothing;