+//===----------------------------------------------------------------------===//
+/// \class
+/// \brief A set of classes that contain the kind and (optional) value of the
+/// attribute object. There are three main categories: enum attribute entries,
+/// represented by Attribute::AttrKind; alignment attribute entries; and string
+/// attribute enties, which are for target-dependent attributes.
+class AttributeEntry {
+ unsigned char KindID;
+protected:
+ enum AttrEntryKind {
+ EnumAttrEntry,
+ AlignAttrEntry,
+ StringAttrEntry
+ };
+public:
+ AttributeEntry(AttrEntryKind Kind)
+ : KindID(Kind) {}
+ virtual ~AttributeEntry() {}
+
+ unsigned getKindID() const { return KindID; }
+
+ static inline bool classof(const AttributeEntry *) { return true; }
+};
+
+class EnumAttributeEntry : public AttributeEntry {
+ Attribute::AttrKind Kind;
+public:
+ EnumAttributeEntry(Attribute::AttrKind Kind)
+ : AttributeEntry(EnumAttrEntry), Kind(Kind) {}
+
+ Attribute::AttrKind getEnumKind() const { return Kind; }
+
+ static inline bool classof(const AttributeEntry *AE) {
+ return AE->getKindID() == EnumAttrEntry;
+ }
+ static inline bool classof(const EnumAttributeEntry *) { return true; }
+};
+
+class AlignAttributeEntry : public AttributeEntry {
+ Attribute::AttrKind Kind;
+ unsigned Align;
+public:
+ AlignAttributeEntry(Attribute::AttrKind Kind, unsigned Align)
+ : AttributeEntry(AlignAttrEntry), Kind(Kind), Align(Align) {}
+
+ Attribute::AttrKind getEnumKind() const { return Kind; }
+ unsigned getAlignment() const { return Align; }
+
+ static inline bool classof(const AttributeEntry *AE) {
+ return AE->getKindID() == AlignAttrEntry;
+ }
+ static inline bool classof(const AlignAttributeEntry *) { return true; }
+};
+
+class StringAttributeEntry : public AttributeEntry {
+ std::string Kind;
+ std::string Val;
+public:
+ StringAttributeEntry(StringRef Kind, StringRef Val = StringRef())
+ : AttributeEntry(StringAttrEntry), Kind(Kind), Val(Val) {}
+
+ StringRef getStringKind() const { return Kind; }
+ StringRef getStringValue() const { return Val; }
+
+ static inline bool classof(const AttributeEntry *AE) {
+ return AE->getKindID() == StringAttrEntry;
+ }
+ static inline bool classof(const StringAttributeEntry *) { return true; }
+};
+