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-//===--- Specifiers.h - Declaration and Type Specifiers ---------*- C++ -*-===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-///
-/// \file
-/// \brief Defines various enumerations that describe declaration and
-/// type specifiers.
-///
-//===----------------------------------------------------------------------===//
-
-#ifndef LLVM_CLANG_BASIC_SPECIFIERS_H
-#define LLVM_CLANG_BASIC_SPECIFIERS_H
-
-#include "llvm/ADT/StringRef.h"
-#include "llvm/Support/DataTypes.h"
-#include "llvm/Support/ErrorHandling.h"
-
-namespace clang {
- /// \brief Specifies the width of a type, e.g., short, long, or long long.
- enum TypeSpecifierWidth {
- TSW_unspecified,
- TSW_short,
- TSW_long,
- TSW_longlong
- };
-
- /// \brief Specifies the signedness of a type, e.g., signed or unsigned.
- enum TypeSpecifierSign {
- TSS_unspecified,
- TSS_signed,
- TSS_unsigned
- };
-
- /// \brief Specifies the kind of type.
- enum TypeSpecifierType {
- TST_unspecified,
- TST_void,
- TST_char,
- TST_wchar, // C++ wchar_t
- TST_char16, // C++11 char16_t
- TST_char32, // C++11 char32_t
- TST_int,
- TST_int128,
- TST_half, // OpenCL half, ARM NEON __fp16
- TST_float,
- TST_double,
- TST_bool, // _Bool
- TST_decimal32, // _Decimal32
- TST_decimal64, // _Decimal64
- TST_decimal128, // _Decimal128
- TST_enum,
- TST_union,
- TST_struct,
- TST_class, // C++ class type
- TST_interface, // C++ (Microsoft-specific) __interface type
- TST_typename, // Typedef, C++ class-name or enum name, etc.
- TST_typeofType,
- TST_typeofExpr,
- TST_decltype, // C++11 decltype
- TST_underlyingType, // __underlying_type for C++11
- TST_auto, // C++11 auto
- TST_decltype_auto, // C++1y decltype(auto)
- TST_auto_type, // __auto_type extension
- TST_unknown_anytype, // __unknown_anytype extension
- TST_atomic, // C11 _Atomic
- TST_error // erroneous type
- };
-
- /// \brief Structure that packs information about the type specifiers that
- /// were written in a particular type specifier sequence.
- struct WrittenBuiltinSpecs {
- /*DeclSpec::TST*/ unsigned Type : 5;
- /*DeclSpec::TSS*/ unsigned Sign : 2;
- /*DeclSpec::TSW*/ unsigned Width : 2;
- bool ModeAttr : 1;
- };
-
- /// \brief A C++ access specifier (public, private, protected), plus the
- /// special value "none" which means different things in different contexts.
- enum AccessSpecifier {
- AS_public,
- AS_protected,
- AS_private,
- AS_none
- };
-
- /// \brief The categorization of expression values, currently following the
- /// C++11 scheme.
- enum ExprValueKind {
- /// \brief An r-value expression (a pr-value in the C++11 taxonomy)
- /// produces a temporary value.
- VK_RValue,
-
- /// \brief An l-value expression is a reference to an object with
- /// independent storage.
- VK_LValue,
-
- /// \brief An x-value expression is a reference to an object with
- /// independent storage but which can be "moved", i.e.
- /// efficiently cannibalized for its resources.
- VK_XValue
- };
-
- /// \brief A further classification of the kind of object referenced by an
- /// l-value or x-value.
- enum ExprObjectKind {
- /// An ordinary object is located at an address in memory.
- OK_Ordinary,
-
- /// A bitfield object is a bitfield on a C or C++ record.
- OK_BitField,
-
- /// A vector component is an element or range of elements on a vector.
- OK_VectorComponent,
-
- /// An Objective-C property is a logical field of an Objective-C
- /// object which is read and written via Objective-C method calls.
- OK_ObjCProperty,
-
- /// An Objective-C array/dictionary subscripting which reads an
- /// object or writes at the subscripted array/dictionary element via
- /// Objective-C method calls.
- OK_ObjCSubscript
- };
-
- /// \brief Describes the kind of template specialization that a
- /// particular template specialization declaration represents.
- enum TemplateSpecializationKind {
- /// This template specialization was formed from a template-id but
- /// has not yet been declared, defined, or instantiated.
- TSK_Undeclared = 0,
- /// This template specialization was implicitly instantiated from a
- /// template. (C++ [temp.inst]).
- TSK_ImplicitInstantiation,
- /// This template specialization was declared or defined by an
- /// explicit specialization (C++ [temp.expl.spec]) or partial
- /// specialization (C++ [temp.class.spec]).
- TSK_ExplicitSpecialization,
- /// This template specialization was instantiated from a template
- /// due to an explicit instantiation declaration request
- /// (C++11 [temp.explicit]).
- TSK_ExplicitInstantiationDeclaration,
- /// This template specialization was instantiated from a template
- /// due to an explicit instantiation definition request
- /// (C++ [temp.explicit]).
- TSK_ExplicitInstantiationDefinition
- };
-
- /// \brief Determine whether this template specialization kind refers
- /// to an instantiation of an entity (as opposed to a non-template or
- /// an explicit specialization).
- inline bool isTemplateInstantiation(TemplateSpecializationKind Kind) {
- return Kind != TSK_Undeclared && Kind != TSK_ExplicitSpecialization;
- }
-
- /// \brief True if this template specialization kind is an explicit
- /// specialization, explicit instantiation declaration, or explicit
- /// instantiation definition.
- inline bool isTemplateExplicitInstantiationOrSpecialization(
- TemplateSpecializationKind Kind) {
- switch (Kind) {
- case TSK_ExplicitSpecialization:
- case TSK_ExplicitInstantiationDeclaration:
- case TSK_ExplicitInstantiationDefinition:
- return true;
-
- case TSK_Undeclared:
- case TSK_ImplicitInstantiation:
- return false;
- }
- llvm_unreachable("bad template specialization kind");
- }
-
- /// \brief Thread storage-class-specifier.
- enum ThreadStorageClassSpecifier {
- TSCS_unspecified,
- /// GNU __thread.
- TSCS___thread,
- /// C++11 thread_local. Implies 'static' at block scope, but not at
- /// class scope.
- TSCS_thread_local,
- /// C11 _Thread_local. Must be combined with either 'static' or 'extern'
- /// if used at block scope.
- TSCS__Thread_local
- };
-
- /// \brief Storage classes.
- enum StorageClass {
- // These are legal on both functions and variables.
- SC_None,
- SC_Extern,
- SC_Static,
- SC_PrivateExtern,
-
- // These are only legal on variables.
- SC_Auto,
- SC_Register
- };
-
- /// \brief Checks whether the given storage class is legal for functions.
- inline bool isLegalForFunction(StorageClass SC) {
- return SC <= SC_PrivateExtern;
- }
-
- /// \brief Checks whether the given storage class is legal for variables.
- inline bool isLegalForVariable(StorageClass SC) {
- return true;
- }
-
- /// \brief In-class initialization styles for non-static data members.
- enum InClassInitStyle {
- ICIS_NoInit, ///< No in-class initializer.
- ICIS_CopyInit, ///< Copy initialization.
- ICIS_ListInit ///< Direct list-initialization.
- };
-
- /// \brief CallingConv - Specifies the calling convention that a function uses.
- enum CallingConv {
- CC_C, // __attribute__((cdecl))
- CC_X86StdCall, // __attribute__((stdcall))
- CC_X86FastCall, // __attribute__((fastcall))
- CC_X86ThisCall, // __attribute__((thiscall))
- CC_X86VectorCall, // __attribute__((vectorcall))
- CC_X86Pascal, // __attribute__((pascal))
- CC_X86_64Win64, // __attribute__((ms_abi))
- CC_X86_64SysV, // __attribute__((sysv_abi))
- CC_AAPCS, // __attribute__((pcs("aapcs")))
- CC_AAPCS_VFP, // __attribute__((pcs("aapcs-vfp")))
- CC_IntelOclBicc, // __attribute__((intel_ocl_bicc))
- CC_SpirFunction, // default for OpenCL functions on SPIR target
- CC_SpirKernel // inferred for OpenCL kernels on SPIR target
- };
-
- /// \brief Checks whether the given calling convention supports variadic
- /// calls. Unprototyped calls also use the variadic call rules.
- inline bool supportsVariadicCall(CallingConv CC) {
- switch (CC) {
- case CC_X86StdCall:
- case CC_X86FastCall:
- case CC_X86ThisCall:
- case CC_X86Pascal:
- case CC_X86VectorCall:
- case CC_SpirFunction:
- case CC_SpirKernel:
- return false;
- default:
- return true;
- }
- }
-
- /// \brief The storage duration for an object (per C++ [basic.stc]).
- enum StorageDuration {
- SD_FullExpression, ///< Full-expression storage duration (for temporaries).
- SD_Automatic, ///< Automatic storage duration (most local variables).
- SD_Thread, ///< Thread storage duration.
- SD_Static, ///< Static storage duration.
- SD_Dynamic ///< Dynamic storage duration.
- };
-
- /// Describes the nullability of a particular type.
- enum class NullabilityKind : uint8_t {
- /// Values of this type can never be null.
- NonNull = 0,
- /// Values of this type can be null.
- Nullable,
- /// Whether values of this type can be null is (explicitly)
- /// unspecified. This captures a (fairly rare) case where we
- /// can't conclude anything about the nullability of the type even
- /// though it has been considered.
- Unspecified
- };
-
- /// Retrieve the spelling of the given nullability kind.
- llvm::StringRef getNullabilitySpelling(NullabilityKind kind,
- bool isContextSensitive = false);
-} // end namespace clang
-
-#endif // LLVM_CLANG_BASIC_SPECIFIERS_H
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