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Serialization: Serialize the raw values of @objc enums.

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This is necessary for @objc enums because, for C compatibility, the representations of the cases must match their raw values. We might want to do this for sufficiently fragile Swift enums in the future too, but that can wait. This lets us successfully print the raw values as ObjC.

Swift SVN r23423
This commit is contained in:
Joe Groff
2014-11-19 04:03:06 +00:00
parent 5059bd4366
commit dc2ad382a2
5 changed files with 74 additions and 15 deletions
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18
lib/Serialization/Serialization.cpp
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@@ -1949,6 +1949,19 @@ void Serializer::writeDecl(const Decl *D) {
auto elem = cast<EnumElementDecl>(D);
const Decl *DC = getDeclForContext(elem->getDeclContext());
// We only serialize the raw values of @objc enums, because they're part
// of the ABI. That isn't the case for Swift enums.
auto RawValueKind = EnumElementRawValueKind::None;
bool Negative = false;
StringRef RawValueText;
if (elem->getParentEnum()->isObjC()) {
// Currently ObjC enums always have integer raw values.
RawValueKind = EnumElementRawValueKind::IntegerLiteral;
auto ILE = cast<IntegerLiteralExpr>(elem->getRawValueExpr());
RawValueText = ILE->getDigitsText();
Negative = ILE->isNegative();
}
unsigned abbrCode = DeclTypeAbbrCodes[EnumElementLayout::Code];
EnumElementLayout::emitRecord(Out, ScratchRecord, abbrCode,
addIdentifierRef(elem->getName()),
@@ -1956,7 +1969,10 @@ void Serializer::writeDecl(const Decl *D) {
addTypeRef(elem->getArgumentType()),
addTypeRef(elem->getType()),
addTypeRef(elem->getInterfaceType()),
elem->isImplicit());
elem->isImplicit(),
(unsigned)RawValueKind,
Negative,
RawValueText);
break;
}