//===--- Attr.def - Swift Attributes Metaprogramming ------------*- C++ -*-===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
//
// This file defines macros used for macro-metaprogramming with attributes.
//
//===----------------------------------------------------------------------===//

#ifndef DECL_ATTR
#define DECL_ATTR(SPELLING, CLASS, OPTIONS, CODE)
#endif

#ifndef CONTEXTUAL_DECL_ATTR
#define CONTEXTUAL_DECL_ATTR(SPELLING, CLASS, OPTIONS, CODE) \
                   DECL_ATTR(SPELLING, CLASS, OPTIONS, CODE)
#endif

#ifndef SIMPLE_DECL_ATTR
#define SIMPLE_DECL_ATTR(X, CLASS, OPTIONS, CODE) \
               DECL_ATTR(X, CLASS, OPTIONS, CODE)
#endif

#ifndef CONTEXTUAL_SIMPLE_DECL_ATTR
#define CONTEXTUAL_SIMPLE_DECL_ATTR(X, CLASS, OPTIONS, CODE) \
                   SIMPLE_DECL_ATTR(X, CLASS, OPTIONS, CODE)
#endif

#ifndef DECL_ATTR_ALIAS
#define DECL_ATTR_ALIAS(SPELLING, CLASS)
#endif

#ifndef CONTEXTUAL_DECL_ATTR_ALIAS
#define CONTEXTUAL_DECL_ATTR_ALIAS(SPELLING, CLASS) \
                   DECL_ATTR_ALIAS(SPELLING, CLASS)
#endif

#ifndef TYPE_ATTR
#define TYPE_ATTR(X)
#endif

// Type attributes
TYPE_ATTR(autoclosure)
TYPE_ATTR(convention)
TYPE_ATTR(noreturn)
TYPE_ATTR(noescape)
TYPE_ATTR(escaping)

// SIL-specific attributes
TYPE_ATTR(block_storage)
TYPE_ATTR(box)
TYPE_ATTR(dynamic_self)
#define REF_STORAGE(Name, name, ...) TYPE_ATTR(sil_##name)
#include "swift/AST/ReferenceStorage.def"
TYPE_ATTR(error)
TYPE_ATTR(out)
TYPE_ATTR(in)
TYPE_ATTR(inout)
TYPE_ATTR(inout_aliasable)
TYPE_ATTR(in_guaranteed)
TYPE_ATTR(in_constant)
TYPE_ATTR(owned)
TYPE_ATTR(unowned_inner_pointer)
TYPE_ATTR(guaranteed)
TYPE_ATTR(autoreleased)
TYPE_ATTR(callee_owned)
TYPE_ATTR(callee_guaranteed)
TYPE_ATTR(objc_metatype)
TYPE_ATTR(opened)
TYPE_ATTR(pseudogeneric)
TYPE_ATTR(yields)
TYPE_ATTR(yield_once)
TYPE_ATTR(yield_many)

// SIL metatype attributes.
TYPE_ATTR(thin)
TYPE_ATTR(thick)

// Schema for DECL_ATTR:
//
// - Attribute name.
// - Class name without the 'Attr' suffix (ignored for
// - Options for the attribute, including:
//    * the declarations the attribute can appear on
//    * whether duplicates are allowed
//    * whether the attribute is considered a decl modifier or not (no '@')
// - Unique attribute identifier used for serialization.  This
//   can never be changed.
//
// SIMPLE_DECL_ATTR is the same, but the class becomes
// SimpleDeclAttr<DAK_##NAME>.
//
// Please help ease code review/audits:
// - Please indent once, not to the opening '('.
// - Please place the "OnXYZ" flags together on the next line.
// - Please place the non-OnXYZ flags together on the next to last line.
// - Please place the unique number on the last line. If the attribute is NOT
//   serialized, then please place that flag on the last line too. For example:
//     123)
//     NotSerialized, 321)
// - Please sort attributes by serialization number.
// - Please create a "NOTE" comment if a unique number is skipped.

DECL_ATTR(_silgen_name, SILGenName,
  OnAbstractFunction |
  LongAttribute | UserInaccessible,
  0)
DECL_ATTR(available, Available,
  OnAbstractFunction | OnGenericType | OnVar | OnSubscript | OnEnumElement |
  OnExtension | OnGenericTypeParam |
  AllowMultipleAttributes | LongAttribute,
  1)
CONTEXTUAL_SIMPLE_DECL_ATTR(final, Final,
  OnClass | OnFunc | OnAccessor | OnVar | OnSubscript |
  DeclModifier,
  2)
DECL_ATTR(objc, ObjC,
  OnAbstractFunction | OnClass | OnProtocol | OnExtension | OnVar |
  OnSubscript | OnEnum | OnEnumElement,
  3)
CONTEXTUAL_SIMPLE_DECL_ATTR(required, Required,
  OnConstructor |
  DeclModifier,
  4)
CONTEXTUAL_SIMPLE_DECL_ATTR(optional, Optional,
  OnConstructor | OnFunc | OnAccessor | OnVar | OnSubscript |
  DeclModifier,
  5)
// NOTE: 6 is unused
SIMPLE_DECL_ATTR(noreturn, NoReturn,
  OnFunc | OnAccessor,
  7)
SIMPLE_DECL_ATTR(_exported, Exported,
  OnImport |
  UserInaccessible,
  8)
SIMPLE_DECL_ATTR(dynamicMemberLookup, DynamicMemberLookup,
  OnNominalType,
  9)
SIMPLE_DECL_ATTR(NSCopying, NSCopying,
  OnVar,
  10)
SIMPLE_DECL_ATTR(IBAction, IBAction,
  OnFunc,
  11)
SIMPLE_DECL_ATTR(IBDesignable, IBDesignable,
  OnClass | OnExtension,
  12)
SIMPLE_DECL_ATTR(IBInspectable, IBInspectable,
  OnVar,
  13)
SIMPLE_DECL_ATTR(IBOutlet, IBOutlet,
  OnVar,
  14)
SIMPLE_DECL_ATTR(NSManaged, NSManaged,
  OnVar | OnFunc | OnAccessor,
  15)
CONTEXTUAL_SIMPLE_DECL_ATTR(lazy, Lazy, DeclModifier |
  OnVar,
  16)
SIMPLE_DECL_ATTR(LLDBDebuggerFunction, LLDBDebuggerFunction,
  OnFunc |
  UserInaccessible,
  17)
SIMPLE_DECL_ATTR(UIApplicationMain, UIApplicationMain,
  OnClass,
  18)
SIMPLE_DECL_ATTR(unsafe_no_objc_tagged_pointer, UnsafeNoObjCTaggedPointer,
  OnProtocol |
  UserInaccessible,
  19)
DECL_ATTR(inline, Inline,
  OnFunc | OnAccessor | OnConstructor,
  20)
DECL_ATTR(_semantics, Semantics,
  OnAbstractFunction | OnSubscript |
  AllowMultipleAttributes | UserInaccessible,
  21)
CONTEXTUAL_SIMPLE_DECL_ATTR(dynamic, Dynamic,
  OnFunc | OnAccessor | OnVar | OnSubscript | OnConstructor |
  DeclModifier,
  22)
CONTEXTUAL_SIMPLE_DECL_ATTR(infix, Infix,
  OnFunc | OnOperator |
  DeclModifier,
  23)
CONTEXTUAL_SIMPLE_DECL_ATTR(prefix, Prefix,
  OnFunc | OnOperator |
  DeclModifier,
  24)
CONTEXTUAL_SIMPLE_DECL_ATTR(postfix, Postfix,
  OnFunc | OnOperator |
  DeclModifier,
  25)
SIMPLE_DECL_ATTR(_transparent, Transparent,
  OnFunc | OnAccessor | OnConstructor | OnVar | UserInaccessible,
  26)
SIMPLE_DECL_ATTR(requires_stored_property_inits, RequiresStoredPropertyInits,
  OnClass,
  27)
SIMPLE_DECL_ATTR(nonobjc, NonObjC,
  OnExtension | OnFunc | OnAccessor | OnVar | OnSubscript | OnConstructor,
  30)
SIMPLE_DECL_ATTR(_fixed_layout, FixedLayout,
  OnVar | OnClass | OnStruct |
  UserInaccessible,
  31)
SIMPLE_DECL_ATTR(inlinable, Inlinable,
  OnVar | OnSubscript | OnAbstractFunction,
  32)
DECL_ATTR(_specialize, Specialize,
  OnConstructor | OnFunc | OnAccessor |
  AllowMultipleAttributes | LongAttribute | UserInaccessible,
  33)
SIMPLE_DECL_ATTR(objcMembers, ObjCMembers,
  OnClass,
  34)
CONTEXTUAL_SIMPLE_DECL_ATTR(__consuming, Consuming,
  OnFunc | OnAccessor |
  DeclModifier |
  UserInaccessible |
  NotSerialized, 40)
CONTEXTUAL_SIMPLE_DECL_ATTR(mutating, Mutating,
  OnFunc | OnAccessor |
  DeclModifier |
  NotSerialized, 41)
CONTEXTUAL_SIMPLE_DECL_ATTR(nonmutating, NonMutating,
  OnFunc | OnAccessor |
  DeclModifier |
  NotSerialized, 42)
CONTEXTUAL_SIMPLE_DECL_ATTR(convenience, Convenience,
  OnConstructor |
  DeclModifier |
  NotSerialized, 43)
CONTEXTUAL_SIMPLE_DECL_ATTR(override, Override,
  OnFunc | OnAccessor | OnVar | OnSubscript | OnConstructor |
  DeclModifier |
  NotSerialized, 44)
SIMPLE_DECL_ATTR(sil_stored, SILStored,
  OnVar |
  SILOnly |
  NotSerialized, 45)
DECL_ATTR(private, AccessControl,
  OnFunc | OnAccessor | OnExtension | OnGenericType | OnVar | OnSubscript |
  OnConstructor |
  DeclModifier |
  NotSerialized, 46)
DECL_ATTR_ALIAS(fileprivate, AccessControl)
DECL_ATTR_ALIAS(internal, AccessControl)
DECL_ATTR_ALIAS(public, AccessControl)
CONTEXTUAL_DECL_ATTR_ALIAS(open, AccessControl)
DECL_ATTR(__setter_access, SetterAccess,
  OnVar | OnSubscript |
  DeclModifier | RejectByParser |
  NotSerialized, 47)
DECL_ATTR(__raw_doc_comment, RawDocComment,
  OnAnyDecl |
  RejectByParser |
  NotSerialized, 48)
CONTEXTUAL_DECL_ATTR(weak, ReferenceOwnership,
  OnVar |
  DeclModifier |
  NotSerialized, 49)
CONTEXTUAL_DECL_ATTR_ALIAS(unowned, ReferenceOwnership)
DECL_ATTR(_effects, Effects,
  OnAbstractFunction |
  UserInaccessible,
  50)
DECL_ATTR(__objc_bridged, ObjCBridged,
  OnClass |
  RejectByParser |
  NotSerialized, 51)
SIMPLE_DECL_ATTR(NSApplicationMain, NSApplicationMain,
  OnClass,
  52)
SIMPLE_DECL_ATTR(_objc_non_lazy_realization, ObjCNonLazyRealization,
  OnClass |
  UserInaccessible,
  53)
DECL_ATTR(__synthesized_protocol, SynthesizedProtocol,
  OnConcreteNominalType |
  RejectByParser |
  NotSerialized, 54)
SIMPLE_DECL_ATTR(testable, Testable,
  OnImport |
  UserInaccessible |
  NotSerialized, 55)
DECL_ATTR(_alignment, Alignment,
  OnStruct | OnEnum |
  UserInaccessible,
  56)
SIMPLE_DECL_ATTR(rethrows, Rethrows,
  OnFunc | OnAccessor | OnConstructor |
  RejectByParser,
  57)
DECL_ATTR(_swift_native_objc_runtime_base, SwiftNativeObjCRuntimeBase,
  OnClass |
  UserInaccessible,
  59)
CONTEXTUAL_SIMPLE_DECL_ATTR(indirect, Indirect, DeclModifier |
  OnEnum | OnEnumElement,
  60)
SIMPLE_DECL_ATTR(warn_unqualified_access, WarnUnqualifiedAccess,
  OnFunc | OnAccessor /*| OnVar*/ |
  LongAttribute,
  61)
SIMPLE_DECL_ATTR(_show_in_interface, ShowInInterface,
  OnProtocol |
  UserInaccessible,
  62)
DECL_ATTR(_cdecl, CDecl,
  OnFunc | OnAccessor |
  LongAttribute | UserInaccessible,
  63)
SIMPLE_DECL_ATTR(usableFromInline, UsableFromInline,
  OnAbstractFunction | OnVar | OnSubscript | OnNominalType | OnTypeAlias |
  LongAttribute,
  64)
SIMPLE_DECL_ATTR(discardableResult, DiscardableResult,
  OnFunc | OnAccessor | OnConstructor |
  LongAttribute,
  65)
SIMPLE_DECL_ATTR(GKInspectable, GKInspectable,
  OnVar,
  66)
DECL_ATTR(_implements, Implements,
  OnFunc | OnAccessor | OnVar | OnSubscript | OnTypeAlias |
  UserInaccessible |
  NotSerialized, 67)
DECL_ATTR(_objcRuntimeName, ObjCRuntimeName,
  OnClass |
  UserInaccessible | RejectByParser |
  NotSerialized, 68)
SIMPLE_DECL_ATTR(_staticInitializeObjCMetadata, StaticInitializeObjCMetadata,
  OnClass | LongAttribute | RejectByParser |
  NotSerialized, 69)
DECL_ATTR(_restatedObjCConformance, RestatedObjCConformance,
  OnProtocol |
  LongAttribute | RejectByParser |
  NotSerialized, 70)
// HACK: Attribute needed to preserve source compatibility by downgrading errors
// due to an SDK change in Dispatch
SIMPLE_DECL_ATTR(_downgrade_exhaustivity_check, DowngradeExhaustivityCheck,
  OnEnumElement |
  LongAttribute | UserInaccessible,
  71)
SIMPLE_DECL_ATTR(_implicitly_unwrapped_optional, ImplicitlyUnwrappedOptional,
  OnFunc | OnAccessor | OnVar | OnParam | OnSubscript | OnConstructor |
  RejectByParser,
  72)
DECL_ATTR(_optimize, Optimize,
  OnAbstractFunction | OnSubscript | OnVar |
  UserInaccessible,
  73)
DECL_ATTR(_clangImporterSynthesizedType, ClangImporterSynthesizedType,
  OnGenericType |
  LongAttribute | RejectByParser | UserInaccessible |
  NotSerialized, 74)
SIMPLE_DECL_ATTR(_weakLinked, WeakLinked,
  OnNominalType | OnFunc | OnAccessor | OnVar | OnSubscript | OnConstructor |
  OnEnumElement |
  UserInaccessible,
  75)
SIMPLE_DECL_ATTR(_frozen, Frozen,
  OnEnum |
  UserInaccessible,
  76)
SIMPLE_DECL_ATTR(_forbidSerializingReference, ForbidSerializingReference,
  OnAnyDecl |
  LongAttribute | RejectByParser | UserInaccessible | NotSerialized,
  77)
SIMPLE_DECL_ATTR(_hasInitialValue, HasInitialValue,
  OnVar |
  UserInaccessible,
  78)

#undef TYPE_ATTR
#undef DECL_ATTR_ALIAS
#undef CONTEXTUAL_DECL_ATTR_ALIAS
#undef SIMPLE_DECL_ATTR
#undef CONTEXTUAL_SIMPLE_DECL_ATTR
#undef DECL_ATTR
#undef CONTEXTUAL_DECL_ATTR