1 //===- OperationKinds.h - Operation enums -----------------------*- 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 //===----------------------------------------------------------------------===//
10 // This file enumerates the different kinds of operations that can be
11 // performed by various expressions.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CLANG_AST_OPERATION_KINDS_H
16 #define LLVM_CLANG_AST_OPERATION_KINDS_H
20 /// CastKind - The kind of operation required for a conversion.
22 /// CK_Dependent - A conversion which cannot yet be analyzed because
23 /// either the expression or target type is dependent. These are
24 /// created only for explicit casts; dependent ASTs aren't required
25 /// to even approximately type-check.
26 /// (T*) malloc(sizeof(T))
27 /// reinterpret_cast<intptr_t>(A<T>::alloc());
30 /// CK_BitCast - A conversion which causes a bit pattern of one type
31 /// to be reinterpreted as a bit pattern of another type. Generally
32 /// the operands must have equivalent size and unrelated types.
34 /// The pointer conversion char* -> int* is a bitcast. A conversion
35 /// from any pointer type to a C pointer type is a bitcast unless
36 /// it's actually BaseToDerived or DerivedToBase. A conversion to a
37 /// block pointer or ObjC pointer type is a bitcast only if the
38 /// operand has the same type kind; otherwise, it's one of the
39 /// specialized casts below.
41 /// Vector coercions are bitcasts.
44 /// CK_LValueBitCast - A conversion which reinterprets the address of
45 /// an l-value as an l-value of a different kind. Used for
46 /// reinterpret_casts of l-value expressions to reference types.
47 /// bool b; reinterpret_cast<char&>(b) = 'a';
50 /// CK_LValueToRValue - A conversion which causes the extraction of
51 /// an r-value from the operand gl-value. The result of an r-value
52 /// conversion is always unqualified.
55 /// CK_NoOp - A conversion which does not affect the type other than
56 /// (possibly) adding qualifiers.
58 /// char** -> const char * const *
61 /// CK_BaseToDerived - A conversion from a C++ class pointer/reference
62 /// to a derived class pointer/reference.
63 /// B *b = static_cast<B*>(a);
66 /// CK_DerivedToBase - A conversion from a C++ class pointer
67 /// to a base class pointer.
71 /// CK_UncheckedDerivedToBase - A conversion from a C++ class
72 /// pointer/reference to a base class that can assume that the
73 /// derived pointer is not null.
75 /// b->method_from_a();
76 CK_UncheckedDerivedToBase,
78 /// CK_Dynamic - A C++ dynamic_cast.
81 /// CK_ToUnion - The GCC cast-to-union extension.
82 /// int -> union { int x; float y; }
83 /// float -> union { int x; float y; }
86 /// CK_ArrayToPointerDecay - Array to pointer decay.
88 /// char[5][6] -> char(*)[6]
89 CK_ArrayToPointerDecay,
91 /// CK_FunctionToPointerDecay - Function to pointer decay.
92 /// void(int) -> void(*)(int)
93 CK_FunctionToPointerDecay,
95 /// CK_NullToPointer - Null pointer constant to pointer, ObjC
96 /// pointer, or block pointer.
98 /// void (^block)() = 0;
101 /// CK_NullToMemberPointer - Null pointer constant to member pointer.
102 /// int A::*mptr = 0;
103 /// int (A::*fptr)(int) = nullptr;
104 CK_NullToMemberPointer,
106 /// CK_BaseToDerivedMemberPointer - Member pointer in base class to
107 /// member pointer in derived class.
108 /// int B::*mptr = &A::member;
109 CK_BaseToDerivedMemberPointer,
111 /// CK_DerivedToBaseMemberPointer - Member pointer in derived class to
112 /// member pointer in base class.
113 /// int A::*mptr = static_cast<int A::*>(&B::member);
114 CK_DerivedToBaseMemberPointer,
116 /// CK_MemberPointerToBoolean - Member pointer to boolean. A check
117 /// against the null member pointer.
118 CK_MemberPointerToBoolean,
120 /// CK_UserDefinedConversion - Conversion using a user defined type
121 /// conversion function.
122 /// struct A { operator int(); }; int i = int(A());
123 CK_UserDefinedConversion,
125 /// CK_ConstructorConversion - Conversion by constructor.
126 /// struct A { A(int); }; A a = A(10);
127 CK_ConstructorConversion,
129 /// CK_IntegralToPointer - Integral to pointer. A special kind of
130 /// reinterpreting conversion. Applies to normal, ObjC, and block
132 /// (char*) 0x1001aab0
133 /// reinterpret_cast<int*>(0)
134 CK_IntegralToPointer,
136 /// CK_PointerToIntegral - Pointer to integral. A special kind of
137 /// reinterpreting conversion. Applies to normal, ObjC, and block
139 /// (intptr_t) "help!"
140 CK_PointerToIntegral,
142 /// CK_PointerToBoolean - Pointer to boolean conversion. A check
143 /// against null. Applies to normal, ObjC, and block pointers.
146 /// CK_ToVoid - Cast to void, discarding the computed value.
147 /// (void) malloc(2048)
150 /// CK_VectorSplat - A conversion from an arithmetic type to a
151 /// vector of that element type. Fills all elements ("splats") with
152 /// the source value.
153 /// __attribute__((ext_vector_type(4))) int v = 5;
156 /// CK_IntegralCast - A cast between integral types (other than to
157 /// boolean). Variously a bitcast, a truncation, a sign-extension,
158 /// or a zero-extension.
163 /// CK_IntegralToBoolean - Integral to boolean. A check against zero.
165 CK_IntegralToBoolean,
167 /// CK_IntegralToFloating - Integral to floating point.
169 CK_IntegralToFloating,
171 /// CK_FloatingToIntegral - Floating point to integral. Rounds
172 /// towards zero, discarding any fractional component.
174 CK_FloatingToIntegral,
176 /// CK_FloatingToBoolean - Floating point to boolean.
178 CK_FloatingToBoolean,
180 /// CK_FloatingCast - Casting between floating types of different size.
185 /// CK_CPointerToObjCPointerCast - Casting a C pointer kind to an
186 /// Objective-C pointer.
187 CK_CPointerToObjCPointerCast,
189 /// CK_BlockPointerToObjCPointerCast - Casting a block pointer to an
191 CK_BlockPointerToObjCPointerCast,
193 /// CK_AnyPointerToBlockPointerCast - Casting any non-block pointer
194 /// to a block pointer. Block-to-block casts are bitcasts.
195 CK_AnyPointerToBlockPointerCast,
197 /// \brief Converting between two Objective-C object types, which
198 /// can occur when performing reference binding to an Objective-C
200 CK_ObjCObjectLValueCast,
202 /// \brief A conversion of a floating point real to a floating point
203 /// complex of the original type. Injects the value as the real
204 /// component with a zero imaginary component.
205 /// float -> _Complex float
206 CK_FloatingRealToComplex,
208 /// \brief Converts a floating point complex to floating point real
209 /// of the source's element type. Just discards the imaginary
211 /// _Complex long double -> long double
212 CK_FloatingComplexToReal,
214 /// \brief Converts a floating point complex to bool by comparing
216 CK_FloatingComplexToBoolean,
218 /// \brief Converts between different floating point complex types.
219 /// _Complex float -> _Complex double
220 CK_FloatingComplexCast,
222 /// \brief Converts from a floating complex to an integral complex.
223 /// _Complex float -> _Complex int
224 CK_FloatingComplexToIntegralComplex,
226 /// \brief Converts from an integral real to an integral complex
227 /// whose element type matches the source. Injects the value as
228 /// the real component with a zero imaginary component.
229 /// long -> _Complex long
230 CK_IntegralRealToComplex,
232 /// \brief Converts an integral complex to an integral real of the
233 /// source's element type by discarding the imaginary component.
234 /// _Complex short -> short
235 CK_IntegralComplexToReal,
237 /// \brief Converts an integral complex to bool by comparing against
239 CK_IntegralComplexToBoolean,
241 /// \brief Converts between different integral complex types.
242 /// _Complex char -> _Complex long long
243 /// _Complex unsigned int -> _Complex signed int
244 CK_IntegralComplexCast,
246 /// \brief Converts from an integral complex to a floating complex.
247 /// _Complex unsigned -> _Complex float
248 CK_IntegralComplexToFloatingComplex,
250 /// \brief [ARC] Produces a retainable object pointer so that it may
251 /// be consumed, e.g. by being passed to a consuming parameter.
252 /// Calls objc_retain.
255 /// \brief [ARC] Consumes a retainable object pointer that has just
256 /// been produced, e.g. as the return value of a retaining call.
257 /// Enters a cleanup to call objc_release at some indefinite time.
260 /// \brief [ARC] Reclaim a retainable object pointer object that may
261 /// have been produced and autoreleased as part of a function return
263 CK_ARCReclaimReturnedObject,
265 /// \brief [ARC] Causes a value of block type to be copied to the
266 /// heap, if it is not already there. A number of other operations
267 /// in ARC cause blocks to be copied; this is for cases where that
268 /// would not otherwise be guaranteed, such as when casting to a
269 /// non-block pointer type.
270 CK_ARCExtendBlockObject
273 #define CK_Invalid ((CastKind) -1)
275 enum BinaryOperatorKind {
276 // Operators listed in order of precedence.
277 // Note that additions to this should also update the StmtVisitor class.
278 BO_PtrMemD, BO_PtrMemI, // [C++ 5.5] Pointer-to-member operators.
279 BO_Mul, BO_Div, BO_Rem, // [C99 6.5.5] Multiplicative operators.
280 BO_Add, BO_Sub, // [C99 6.5.6] Additive operators.
281 BO_Shl, BO_Shr, // [C99 6.5.7] Bitwise shift operators.
282 BO_LT, BO_GT, BO_LE, BO_GE, // [C99 6.5.8] Relational operators.
283 BO_EQ, BO_NE, // [C99 6.5.9] Equality operators.
284 BO_And, // [C99 6.5.10] Bitwise AND operator.
285 BO_Xor, // [C99 6.5.11] Bitwise XOR operator.
286 BO_Or, // [C99 6.5.12] Bitwise OR operator.
287 BO_LAnd, // [C99 6.5.13] Logical AND operator.
288 BO_LOr, // [C99 6.5.14] Logical OR operator.
289 BO_Assign, BO_MulAssign, // [C99 6.5.16] Assignment operators.
290 BO_DivAssign, BO_RemAssign,
291 BO_AddAssign, BO_SubAssign,
292 BO_ShlAssign, BO_ShrAssign,
293 BO_AndAssign, BO_XorAssign,
295 BO_Comma // [C99 6.5.17] Comma operator.
298 enum UnaryOperatorKind {
299 // Note that additions to this should also update the StmtVisitor class.
300 UO_PostInc, UO_PostDec, // [C99 6.5.2.4] Postfix increment and decrement
301 UO_PreInc, UO_PreDec, // [C99 6.5.3.1] Prefix increment and decrement
302 UO_AddrOf, UO_Deref, // [C99 6.5.3.2] Address and indirection
303 UO_Plus, UO_Minus, // [C99 6.5.3.3] Unary arithmetic
304 UO_Not, UO_LNot, // [C99 6.5.3.3] Unary arithmetic
305 UO_Real, UO_Imag, // "__real expr"/"__imag expr" Extension.
306 UO_Extension // __extension__ marker.
309 /// \brief The kind of bridging performed by the Objective-C bridge cast.
310 enum ObjCBridgeCastKind {
311 /// \brief Bridging via __bridge, which does nothing but reinterpret
314 /// \brief Bridging via __bridge_transfer, which transfers ownership of an
315 /// Objective-C pointer into ARC.
317 /// \brief Bridging via __bridge_retain, which makes an ARC object available
318 /// as a +1 C pointer.