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//===-- TypeNodes.def - Metadata about Type AST nodes -----------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file defines the AST type info database. Each type node is
//  enumerated by providing its name (e.g., "Builtin" or "Enum") and
//  base class (e.g., "Type" or "TagType"). Depending on where in the
//  abstract syntax tree the type will show up, the enumeration uses
//  one of four different macros:
//
//    TYPE(Class, Base) - A type that can show up anywhere in the AST,
//    and might be dependent, canonical, or non-canonical. All clients
//    will need to understand these types.
//
//    ABSTRACT_TYPE(Class, Base) - An abstract class that shows up in
//    the type hierarchy but has no concrete instances.
//
//    NON_CANONICAL_TYPE(Class, Base) - A type that can show up
//    anywhere in the AST but will never be a part of a canonical
//    type. Clients that only need to deal with canonical types
//    (ignoring, e.g., typedefs and other type alises used for
//    pretty-printing) can ignore these types.
//
//    DEPENDENT_TYPE(Class, Base) - A type that will only show up
//    within a C++ template that has not been instantiated, e.g., a
//    type that is always dependent. Clients that do not need to deal
//    with uninstantiated C++ templates can ignore these types.
//
//    NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) - A type that
//    is non-canonical unless it is dependent.  Defaults to TYPE because
//    it is neither reliably dependent nor reliably non-canonical.
//
//  There is a sixth macro, independent of the others.  Most clients
//  will not need to use it.
//
//    LEAF_TYPE(Class) - A type that never has inner types.  Clients
//    which can operate on such types more efficiently may wish to do so.
//
//===----------------------------------------------------------------------===//

#ifndef ABSTRACT_TYPE
#  define ABSTRACT_TYPE(Class, Base) TYPE(Class, Base)
#endif

#ifndef NON_CANONICAL_TYPE
#  define NON_CANONICAL_TYPE(Class, Base) TYPE(Class, Base)
#endif

#ifndef DEPENDENT_TYPE
#  define DEPENDENT_TYPE(Class, Base) TYPE(Class, Base)
#endif

#ifndef NON_CANONICAL_UNLESS_DEPENDENT_TYPE
#  define NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Class, Base) TYPE(Class, Base)
#endif

TYPE(Builtin, Type)
TYPE(Complex, Type)
TYPE(Pointer, Type)
TYPE(BlockPointer, Type)
ABSTRACT_TYPE(Reference, Type)
TYPE(LValueReference, ReferenceType)
TYPE(RValueReference, ReferenceType)
TYPE(MemberPointer, Type)
ABSTRACT_TYPE(Array, Type)
TYPE(ConstantArray, ArrayType)
TYPE(IncompleteArray, ArrayType)
TYPE(VariableArray, ArrayType)
DEPENDENT_TYPE(DependentSizedArray, ArrayType)
DEPENDENT_TYPE(DependentSizedExtVector, Type)
TYPE(Vector, Type)
TYPE(ExtVector, VectorType)
ABSTRACT_TYPE(Function, Type)
TYPE(FunctionProto, FunctionType)
TYPE(FunctionNoProto, FunctionType)
DEPENDENT_TYPE(UnresolvedUsing, Type)
NON_CANONICAL_TYPE(Paren, Type)
NON_CANONICAL_TYPE(Typedef, Type)
NON_CANONICAL_UNLESS_DEPENDENT_TYPE(TypeOfExpr, Type)
NON_CANONICAL_UNLESS_DEPENDENT_TYPE(TypeOf, Type)
NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Decltype, Type)
NON_CANONICAL_UNLESS_DEPENDENT_TYPE(UnaryTransform, Type)
ABSTRACT_TYPE(Tag, Type)
TYPE(Record, TagType)
TYPE(Enum, TagType)
NON_CANONICAL_TYPE(Elaborated, Type)
NON_CANONICAL_TYPE(Attributed, Type)
DEPENDENT_TYPE(TemplateTypeParm, Type)
NON_CANONICAL_TYPE(SubstTemplateTypeParm, Type)
DEPENDENT_TYPE(SubstTemplateTypeParmPack, Type)
NON_CANONICAL_UNLESS_DEPENDENT_TYPE(TemplateSpecialization, Type)
NON_CANONICAL_UNLESS_DEPENDENT_TYPE(Auto, Type)
DEPENDENT_TYPE(InjectedClassName, Type)
DEPENDENT_TYPE(DependentName, Type)
DEPENDENT_TYPE(DependentTemplateSpecialization, Type)
DEPENDENT_TYPE(PackExpansion, Type)
TYPE(ObjCObject, Type)
TYPE(ObjCInterface, ObjCObjectType)
TYPE(ObjCObjectPointer, Type)
TYPE(Atomic, Type)

#ifdef LAST_TYPE
LAST_TYPE(Atomic)
#undef LAST_TYPE
#endif

// These types are always leaves in the type hierarchy.
#ifdef LEAF_TYPE
LEAF_TYPE(Enum)
LEAF_TYPE(Builtin)
LEAF_TYPE(Record)
LEAF_TYPE(InjectedClassName)
LEAF_TYPE(ObjCInterface)
LEAF_TYPE(TemplateTypeParm)
#undef LEAF_TYPE
#endif

#undef NON_CANONICAL_UNLESS_DEPENDENT_TYPE
#undef DEPENDENT_TYPE
#undef NON_CANONICAL_TYPE
#undef ABSTRACT_TYPE
#undef TYPE