1 //===--- Specifiers.h - Declaration and Type Specifiers ---------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief Defines various enumerations that describe declaration and
14 //===----------------------------------------------------------------------===//
16 #ifndef LLVM_CLANG_BASIC_SPECIFIERS_H
17 #define LLVM_CLANG_BASIC_SPECIFIERS_H
19 #include "llvm/ADT/StringRef.h"
20 #include "llvm/Support/DataTypes.h"
21 #include "llvm/Support/ErrorHandling.h"
24 /// \brief Specifies the width of a type, e.g., short, long, or long long.
25 enum TypeSpecifierWidth {
32 /// \brief Specifies the signedness of a type, e.g., signed or unsigned.
33 enum TypeSpecifierSign {
39 enum TypeSpecifiersPipe {
44 /// \brief Specifies the kind of type.
45 enum TypeSpecifierType {
49 TST_wchar, // C++ wchar_t
50 TST_char16, // C++11 char16_t
51 TST_char32, // C++11 char32_t
54 TST_half, // OpenCL half, ARM NEON __fp16
59 TST_decimal32, // _Decimal32
60 TST_decimal64, // _Decimal64
61 TST_decimal128, // _Decimal128
65 TST_class, // C++ class type
66 TST_interface, // C++ (Microsoft-specific) __interface type
67 TST_typename, // Typedef, C++ class-name or enum name, etc.
70 TST_decltype, // C++11 decltype
71 TST_underlyingType, // __underlying_type for C++11
72 TST_auto, // C++11 auto
73 TST_decltype_auto, // C++1y decltype(auto)
74 TST_auto_type, // __auto_type extension
75 TST_unknown_anytype, // __unknown_anytype extension
76 TST_atomic, // C11 _Atomic
77 #define GENERIC_IMAGE_TYPE(ImgType, Id) TST_##ImgType##_t, // OpenCL image types
78 #include "clang/Basic/OpenCLImageTypes.def"
79 TST_error // erroneous type
82 /// \brief Structure that packs information about the type specifiers that
83 /// were written in a particular type specifier sequence.
84 struct WrittenBuiltinSpecs {
85 static_assert(TST_error < 1 << 6, "Type bitfield not wide enough for TST");
86 /*DeclSpec::TST*/ unsigned Type : 6;
87 /*DeclSpec::TSS*/ unsigned Sign : 2;
88 /*DeclSpec::TSW*/ unsigned Width : 2;
89 unsigned ModeAttr : 1;
92 /// \brief A C++ access specifier (public, private, protected), plus the
93 /// special value "none" which means different things in different contexts.
94 enum AccessSpecifier {
101 /// \brief The categorization of expression values, currently following the
104 /// \brief An r-value expression (a pr-value in the C++11 taxonomy)
105 /// produces a temporary value.
108 /// \brief An l-value expression is a reference to an object with
109 /// independent storage.
112 /// \brief An x-value expression is a reference to an object with
113 /// independent storage but which can be "moved", i.e.
114 /// efficiently cannibalized for its resources.
118 /// \brief A further classification of the kind of object referenced by an
119 /// l-value or x-value.
120 enum ExprObjectKind {
121 /// An ordinary object is located at an address in memory.
124 /// A bitfield object is a bitfield on a C or C++ record.
127 /// A vector component is an element or range of elements on a vector.
130 /// An Objective-C property is a logical field of an Objective-C
131 /// object which is read and written via Objective-C method calls.
134 /// An Objective-C array/dictionary subscripting which reads an
135 /// object or writes at the subscripted array/dictionary element via
136 /// Objective-C method calls.
140 /// \brief Describes the kind of template specialization that a
141 /// particular template specialization declaration represents.
142 enum TemplateSpecializationKind {
143 /// This template specialization was formed from a template-id but
144 /// has not yet been declared, defined, or instantiated.
146 /// This template specialization was implicitly instantiated from a
147 /// template. (C++ [temp.inst]).
148 TSK_ImplicitInstantiation,
149 /// This template specialization was declared or defined by an
150 /// explicit specialization (C++ [temp.expl.spec]) or partial
151 /// specialization (C++ [temp.class.spec]).
152 TSK_ExplicitSpecialization,
153 /// This template specialization was instantiated from a template
154 /// due to an explicit instantiation declaration request
155 /// (C++11 [temp.explicit]).
156 TSK_ExplicitInstantiationDeclaration,
157 /// This template specialization was instantiated from a template
158 /// due to an explicit instantiation definition request
159 /// (C++ [temp.explicit]).
160 TSK_ExplicitInstantiationDefinition
163 /// \brief Determine whether this template specialization kind refers
164 /// to an instantiation of an entity (as opposed to a non-template or
165 /// an explicit specialization).
166 inline bool isTemplateInstantiation(TemplateSpecializationKind Kind) {
167 return Kind != TSK_Undeclared && Kind != TSK_ExplicitSpecialization;
170 /// \brief True if this template specialization kind is an explicit
171 /// specialization, explicit instantiation declaration, or explicit
172 /// instantiation definition.
173 inline bool isTemplateExplicitInstantiationOrSpecialization(
174 TemplateSpecializationKind Kind) {
176 case TSK_ExplicitSpecialization:
177 case TSK_ExplicitInstantiationDeclaration:
178 case TSK_ExplicitInstantiationDefinition:
182 case TSK_ImplicitInstantiation:
185 llvm_unreachable("bad template specialization kind");
188 /// \brief Thread storage-class-specifier.
189 enum ThreadStorageClassSpecifier {
193 /// C++11 thread_local. Implies 'static' at block scope, but not at
196 /// C11 _Thread_local. Must be combined with either 'static' or 'extern'
197 /// if used at block scope.
201 /// \brief Storage classes.
203 // These are legal on both functions and variables.
209 // These are only legal on variables.
214 /// \brief Checks whether the given storage class is legal for functions.
215 inline bool isLegalForFunction(StorageClass SC) {
216 return SC <= SC_PrivateExtern;
219 /// \brief Checks whether the given storage class is legal for variables.
220 inline bool isLegalForVariable(StorageClass SC) {
224 /// \brief In-class initialization styles for non-static data members.
225 enum InClassInitStyle {
226 ICIS_NoInit, ///< No in-class initializer.
227 ICIS_CopyInit, ///< Copy initialization.
228 ICIS_ListInit ///< Direct list-initialization.
231 /// \brief CallingConv - Specifies the calling convention that a function uses.
233 CC_C, // __attribute__((cdecl))
234 CC_X86StdCall, // __attribute__((stdcall))
235 CC_X86FastCall, // __attribute__((fastcall))
236 CC_X86ThisCall, // __attribute__((thiscall))
237 CC_X86VectorCall, // __attribute__((vectorcall))
238 CC_X86Pascal, // __attribute__((pascal))
239 CC_X86_64Win64, // __attribute__((ms_abi))
240 CC_X86_64SysV, // __attribute__((sysv_abi))
241 CC_X86RegCall, // __attribute__((regcall))
242 CC_AAPCS, // __attribute__((pcs("aapcs")))
243 CC_AAPCS_VFP, // __attribute__((pcs("aapcs-vfp")))
244 CC_IntelOclBicc, // __attribute__((intel_ocl_bicc))
245 CC_SpirFunction, // default for OpenCL functions on SPIR target
246 CC_OpenCLKernel, // inferred for OpenCL kernels
247 CC_Swift, // __attribute__((swiftcall))
248 CC_PreserveMost, // __attribute__((preserve_most))
249 CC_PreserveAll, // __attribute__((preserve_all))
252 /// \brief Checks whether the given calling convention supports variadic
253 /// calls. Unprototyped calls also use the variadic call rules.
254 inline bool supportsVariadicCall(CallingConv CC) {
261 case CC_X86VectorCall:
262 case CC_SpirFunction:
263 case CC_OpenCLKernel:
271 /// \brief The storage duration for an object (per C++ [basic.stc]).
272 enum StorageDuration {
273 SD_FullExpression, ///< Full-expression storage duration (for temporaries).
274 SD_Automatic, ///< Automatic storage duration (most local variables).
275 SD_Thread, ///< Thread storage duration.
276 SD_Static, ///< Static storage duration.
277 SD_Dynamic ///< Dynamic storage duration.
280 /// Describes the nullability of a particular type.
281 enum class NullabilityKind : uint8_t {
282 /// Values of this type can never be null.
284 /// Values of this type can be null.
286 /// Whether values of this type can be null is (explicitly)
287 /// unspecified. This captures a (fairly rare) case where we
288 /// can't conclude anything about the nullability of the type even
289 /// though it has been considered.
293 /// Retrieve the spelling of the given nullability kind.
294 llvm::StringRef getNullabilitySpelling(NullabilityKind kind,
295 bool isContextSensitive = false);
297 /// \brief Kinds of parameter ABI.
298 enum class ParameterABI {
299 /// This parameter uses ordinary ABI rules for its type.
302 /// This parameter (which must have pointer type) is a Swift
303 /// indirect result parameter.
306 /// This parameter (which must have pointer-to-pointer type) uses
307 /// the special Swift error-result ABI treatment. There can be at
308 /// most one parameter on a given function that uses this treatment.
311 /// This parameter (which must have pointer type) uses the special
312 /// Swift context-pointer ABI treatment. There can be at
313 /// most one parameter on a given function that uses this treatment.
317 llvm::StringRef getParameterABISpelling(ParameterABI kind);
318 } // end namespace clang
320 #endif // LLVM_CLANG_BASIC_SPECIFIERS_H