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[serialization] Add support for generic requirements.

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Same-type requirements aren't tested yet because there's currently no
support for associated types.

This includes an improvement to BCRecordLayout: array elements can be
passed inline, and the static checks that the data count matches the
field count will take this into account.

Swift SVN r5984
This commit is contained in:
Jordan Rose
2013-07-04 00:15:06 +00:00
parent 61efdb5ff7
commit 197b696ce6
4 changed files with 130 additions and 11 deletions
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40
lib/Serialization/ModuleFile.cpp
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@@ -216,7 +216,47 @@ GenericParamList *ModuleFile::maybeReadGenericParams(DeclContext *DC) {
}
break;
}
case GENERIC_REQUIREMENT: {
uint8_t rawKind;
ArrayRef<uint64_t> rawTypeIDs;
GenericRequirementLayout::readRecord(scratch, rawKind, rawTypeIDs);
switch (rawKind) {
case GenericRequirementKind::Conformance: {
assert(rawTypeIDs.size() == 2);
TypeLoc subject, constraint;
{
BCOffsetRAII restoreInnerOffset(DeclTypeCursor);
subject = TypeLoc::withoutLoc(getType(rawTypeIDs[0]));
constraint = TypeLoc::withoutLoc(getType(rawTypeIDs[1]));
}
requirements.push_back(Requirement::getConformance(subject,
SourceLoc(),
constraint));
break;
}
case GenericRequirementKind::SameType: {
assert(rawTypeIDs.size() == 2);
TypeLoc first, second;
{
BCOffsetRAII restoreInnerOffset(DeclTypeCursor);
first = TypeLoc::withoutLoc(getType(rawTypeIDs[0]));
second = TypeLoc::withoutLoc(getType(rawTypeIDs[1]));
}
requirements.push_back(Requirement::getSameType(first,
SourceLoc(),
second));
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();
}
}
default:
// This record is not part of the GenericParamList.
shouldContinue = false;
break;
}