1//===- ExprObjC.cpp - (ObjC) Expression AST Node Implementation -----------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file implements the subclesses of Expr class declared in ExprObjC.h
10//
11//===----------------------------------------------------------------------===//
12
13#include "clang/AST/ExprObjC.h"
14#include "clang/AST/ASTContext.h"
15#include "clang/AST/Attr.h"
16#include "clang/AST/ComputeDependence.h"
17#include "clang/AST/SelectorLocationsKind.h"
18#include "clang/AST/Type.h"
19#include "clang/AST/TypeLoc.h"
20#include "llvm/Support/ErrorHandling.h"
21#include <cassert>
22#include <cstdint>
23
24using namespace clang;
25
26ObjCArrayLiteral::ObjCArrayLiteral(ArrayRef<Expr *> Elements, QualType T,
27 ObjCMethodDecl *Method, SourceRange SR)
28 : Expr(ObjCArrayLiteralClass, T, VK_PRValue, OK_Ordinary),
29 NumElements(Elements.size()), Range(SR), ArrayWithObjectsMethod(Method) {
30 Expr **SaveElements = getElements();
31 for (unsigned I = 0, N = Elements.size(); I != N; ++I)
32 SaveElements[I] = Elements[I];
33
34 setDependence(computeDependence(E: this));
35}
36
37ObjCArrayLiteral *ObjCArrayLiteral::Create(const ASTContext &C,
38 ArrayRef<Expr *> Elements,
39 QualType T, ObjCMethodDecl *Method,
40 SourceRange SR) {
41 void *Mem = C.Allocate(Size: totalSizeToAlloc<Expr *>(Counts: Elements.size()));
42 return new (Mem) ObjCArrayLiteral(Elements, T, Method, SR);
43}
44
45ObjCArrayLiteral *ObjCArrayLiteral::CreateEmpty(const ASTContext &C,
46 unsigned NumElements) {
47 void *Mem = C.Allocate(Size: totalSizeToAlloc<Expr *>(Counts: NumElements));
48 return new (Mem) ObjCArrayLiteral(EmptyShell(), NumElements);
49}
50
51ObjCDictionaryLiteral::ObjCDictionaryLiteral(ArrayRef<ObjCDictionaryElement> VK,
52 bool HasPackExpansions, QualType T,
53 ObjCMethodDecl *method,
54 SourceRange SR)
55 : Expr(ObjCDictionaryLiteralClass, T, VK_PRValue, OK_Ordinary),
56 NumElements(VK.size()), HasPackExpansions(HasPackExpansions), Range(SR),
57 DictWithObjectsMethod(method) {
58 KeyValuePair *KeyValues = getTrailingObjects<KeyValuePair>();
59 ExpansionData *Expansions =
60 HasPackExpansions ? getTrailingObjects<ExpansionData>() : nullptr;
61 for (unsigned I = 0; I < NumElements; I++) {
62 KeyValues[I].Key = VK[I].Key;
63 KeyValues[I].Value = VK[I].Value;
64 if (Expansions) {
65 Expansions[I].EllipsisLoc = VK[I].EllipsisLoc;
66 if (VK[I].NumExpansions)
67 Expansions[I].NumExpansionsPlusOne = *VK[I].NumExpansions + 1;
68 else
69 Expansions[I].NumExpansionsPlusOne = 0;
70 }
71 }
72 setDependence(computeDependence(E: this));
73}
74
75ObjCDictionaryLiteral *
76ObjCDictionaryLiteral::Create(const ASTContext &C,
77 ArrayRef<ObjCDictionaryElement> VK,
78 bool HasPackExpansions, QualType T,
79 ObjCMethodDecl *method, SourceRange SR) {
80 void *Mem = C.Allocate(Size: totalSizeToAlloc<KeyValuePair, ExpansionData>(
81 Counts: VK.size(), Counts: HasPackExpansions ? VK.size() : 0));
82 return new (Mem) ObjCDictionaryLiteral(VK, HasPackExpansions, T, method, SR);
83}
84
85ObjCDictionaryLiteral *
86ObjCDictionaryLiteral::CreateEmpty(const ASTContext &C, unsigned NumElements,
87 bool HasPackExpansions) {
88 void *Mem = C.Allocate(Size: totalSizeToAlloc<KeyValuePair, ExpansionData>(
89 Counts: NumElements, Counts: HasPackExpansions ? NumElements : 0));
90 return new (Mem)
91 ObjCDictionaryLiteral(EmptyShell(), NumElements, HasPackExpansions);
92}
93
94QualType ObjCPropertyRefExpr::getReceiverType(const ASTContext &ctx) const {
95 if (isClassReceiver())
96 return ctx.getObjCInterfaceType(Decl: getClassReceiver());
97
98 if (isSuperReceiver())
99 return getSuperReceiverType();
100
101 return getBase()->getType();
102}
103
104ObjCMessageExpr::ObjCMessageExpr(QualType T, ExprValueKind VK,
105 SourceLocation LBracLoc,
106 SourceLocation SuperLoc, bool IsInstanceSuper,
107 QualType SuperType, Selector Sel,
108 ArrayRef<SourceLocation> SelLocs,
109 SelectorLocationsKind SelLocsK,
110 ObjCMethodDecl *Method, ArrayRef<Expr *> Args,
111 SourceLocation RBracLoc, bool isImplicit)
112 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary),
113 SelectorOrMethod(
114 reinterpret_cast<uintptr_t>(Method ? Method : Sel.getAsOpaquePtr())),
115 Kind(IsInstanceSuper ? SuperInstance : SuperClass),
116 HasMethod(Method != nullptr), IsDelegateInitCall(false),
117 IsImplicit(isImplicit), SuperLoc(SuperLoc), LBracLoc(LBracLoc),
118 RBracLoc(RBracLoc) {
119 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
120 setReceiverPointer(SuperType.getAsOpaquePtr());
121 setDependence(computeDependence(E: this));
122}
123
124ObjCMessageExpr::ObjCMessageExpr(QualType T, ExprValueKind VK,
125 SourceLocation LBracLoc,
126 TypeSourceInfo *Receiver, Selector Sel,
127 ArrayRef<SourceLocation> SelLocs,
128 SelectorLocationsKind SelLocsK,
129 ObjCMethodDecl *Method, ArrayRef<Expr *> Args,
130 SourceLocation RBracLoc, bool isImplicit)
131 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary),
132 SelectorOrMethod(
133 reinterpret_cast<uintptr_t>(Method ? Method : Sel.getAsOpaquePtr())),
134 Kind(Class), HasMethod(Method != nullptr), IsDelegateInitCall(false),
135 IsImplicit(isImplicit), LBracLoc(LBracLoc), RBracLoc(RBracLoc) {
136 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
137 setReceiverPointer(Receiver);
138 setDependence(computeDependence(E: this));
139}
140
141ObjCMessageExpr::ObjCMessageExpr(QualType T, ExprValueKind VK,
142 SourceLocation LBracLoc, Expr *Receiver,
143 Selector Sel, ArrayRef<SourceLocation> SelLocs,
144 SelectorLocationsKind SelLocsK,
145 ObjCMethodDecl *Method, ArrayRef<Expr *> Args,
146 SourceLocation RBracLoc, bool isImplicit)
147 : Expr(ObjCMessageExprClass, T, VK, OK_Ordinary),
148 SelectorOrMethod(
149 reinterpret_cast<uintptr_t>(Method ? Method : Sel.getAsOpaquePtr())),
150 Kind(Instance), HasMethod(Method != nullptr), IsDelegateInitCall(false),
151 IsImplicit(isImplicit), LBracLoc(LBracLoc), RBracLoc(RBracLoc) {
152 initArgsAndSelLocs(Args, SelLocs, SelLocsK);
153 setReceiverPointer(Receiver);
154 setDependence(computeDependence(E: this));
155}
156
157void ObjCMessageExpr::initArgsAndSelLocs(ArrayRef<Expr *> Args,
158 ArrayRef<SourceLocation> SelLocs,
159 SelectorLocationsKind SelLocsK) {
160 setNumArgs(Args.size());
161 Expr **MyArgs = getArgs();
162 for (unsigned I = 0; I != Args.size(); ++I)
163 MyArgs[I] = Args[I];
164
165 SelLocsKind = SelLocsK;
166 if (!isImplicit() && SelLocsK == SelLoc_NonStandard)
167 llvm::copy(Range&: SelLocs, Out: getStoredSelLocs());
168}
169
170ObjCMessageExpr *
171ObjCMessageExpr::Create(const ASTContext &Context, QualType T, ExprValueKind VK,
172 SourceLocation LBracLoc, SourceLocation SuperLoc,
173 bool IsInstanceSuper, QualType SuperType, Selector Sel,
174 ArrayRef<SourceLocation> SelLocs,
175 ObjCMethodDecl *Method, ArrayRef<Expr *> Args,
176 SourceLocation RBracLoc, bool isImplicit) {
177 assert((!SelLocs.empty() || isImplicit) &&
178 "No selector locs for non-implicit message");
179 ObjCMessageExpr *Mem;
180 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
181 if (isImplicit)
182 Mem = alloc(C: Context, NumArgs: Args.size(), NumStoredSelLocs: 0);
183 else
184 Mem = alloc(C: Context, Args, RBraceLoc: RBracLoc, SelLocs, Sel, SelLocsK);
185 return new (Mem) ObjCMessageExpr(T, VK, LBracLoc, SuperLoc, IsInstanceSuper,
186 SuperType, Sel, SelLocs, SelLocsK, Method,
187 Args, RBracLoc, isImplicit);
188}
189
190ObjCMessageExpr *
191ObjCMessageExpr::Create(const ASTContext &Context, QualType T, ExprValueKind VK,
192 SourceLocation LBracLoc, TypeSourceInfo *Receiver,
193 Selector Sel, ArrayRef<SourceLocation> SelLocs,
194 ObjCMethodDecl *Method, ArrayRef<Expr *> Args,
195 SourceLocation RBracLoc, bool isImplicit) {
196 assert((!SelLocs.empty() || isImplicit) &&
197 "No selector locs for non-implicit message");
198 ObjCMessageExpr *Mem;
199 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
200 if (isImplicit)
201 Mem = alloc(C: Context, NumArgs: Args.size(), NumStoredSelLocs: 0);
202 else
203 Mem = alloc(C: Context, Args, RBraceLoc: RBracLoc, SelLocs, Sel, SelLocsK);
204 return new (Mem)
205 ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel, SelLocs, SelLocsK, Method,
206 Args, RBracLoc, isImplicit);
207}
208
209ObjCMessageExpr *
210ObjCMessageExpr::Create(const ASTContext &Context, QualType T, ExprValueKind VK,
211 SourceLocation LBracLoc, Expr *Receiver, Selector Sel,
212 ArrayRef<SourceLocation> SelLocs,
213 ObjCMethodDecl *Method, ArrayRef<Expr *> Args,
214 SourceLocation RBracLoc, bool isImplicit) {
215 assert((!SelLocs.empty() || isImplicit) &&
216 "No selector locs for non-implicit message");
217 ObjCMessageExpr *Mem;
218 SelectorLocationsKind SelLocsK = SelectorLocationsKind();
219 if (isImplicit)
220 Mem = alloc(C: Context, NumArgs: Args.size(), NumStoredSelLocs: 0);
221 else
222 Mem = alloc(C: Context, Args, RBraceLoc: RBracLoc, SelLocs, Sel, SelLocsK);
223 return new (Mem)
224 ObjCMessageExpr(T, VK, LBracLoc, Receiver, Sel, SelLocs, SelLocsK, Method,
225 Args, RBracLoc, isImplicit);
226}
227
228ObjCMessageExpr *ObjCMessageExpr::CreateEmpty(const ASTContext &Context,
229 unsigned NumArgs,
230 unsigned NumStoredSelLocs) {
231 ObjCMessageExpr *Mem = alloc(C: Context, NumArgs, NumStoredSelLocs);
232 return new (Mem) ObjCMessageExpr(EmptyShell(), NumArgs);
233}
234
235ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C,
236 ArrayRef<Expr *> Args,
237 SourceLocation RBraceLoc,
238 ArrayRef<SourceLocation> SelLocs,
239 Selector Sel,
240 SelectorLocationsKind &SelLocsK) {
241 SelLocsK = hasStandardSelectorLocs(Sel, SelLocs, Args, EndLoc: RBraceLoc);
242 unsigned NumStoredSelLocs =
243 (SelLocsK == SelLoc_NonStandard) ? SelLocs.size() : 0;
244 return alloc(C, NumArgs: Args.size(), NumStoredSelLocs);
245}
246
247ObjCMessageExpr *ObjCMessageExpr::alloc(const ASTContext &C, unsigned NumArgs,
248 unsigned NumStoredSelLocs) {
249 return (ObjCMessageExpr *)C.Allocate(
250 Size: totalSizeToAlloc<void *, SourceLocation>(Counts: NumArgs + 1, Counts: NumStoredSelLocs),
251 Align: alignof(ObjCMessageExpr));
252}
253
254void ObjCMessageExpr::getSelectorLocs(
255 SmallVectorImpl<SourceLocation> &SelLocs) const {
256 for (unsigned i = 0, e = getNumSelectorLocs(); i != e; ++i)
257 SelLocs.push_back(Elt: getSelectorLoc(Index: i));
258}
259
260
261QualType ObjCMessageExpr::getCallReturnType(ASTContext &Ctx) const {
262 if (const ObjCMethodDecl *MD = getMethodDecl()) {
263 QualType QT = MD->getReturnType();
264 if (QT == Ctx.getObjCInstanceType()) {
265 // instancetype corresponds to expression types.
266 return getType();
267 }
268 return QT;
269 }
270 return Ctx.getReferenceQualifiedType(e: this);
271}
272
273SourceRange ObjCMessageExpr::getReceiverRange() const {
274 switch (getReceiverKind()) {
275 case Instance:
276 return getInstanceReceiver()->getSourceRange();
277
278 case Class:
279 return getClassReceiverTypeInfo()->getTypeLoc().getSourceRange();
280
281 case SuperInstance:
282 case SuperClass:
283 return getSuperLoc();
284 }
285
286 llvm_unreachable("Invalid ReceiverKind!");
287}
288
289Selector ObjCMessageExpr::getSelector() const {
290 if (HasMethod)
291 return reinterpret_cast<const ObjCMethodDecl *>(SelectorOrMethod)
292 ->getSelector();
293 return Selector(SelectorOrMethod);
294}
295
296QualType ObjCMessageExpr::getReceiverType() const {
297 switch (getReceiverKind()) {
298 case Instance:
299 return getInstanceReceiver()->getType();
300 case Class:
301 return getClassReceiver();
302 case SuperInstance:
303 case SuperClass:
304 return getSuperType();
305 }
306
307 llvm_unreachable("unexpected receiver kind");
308}
309
310ObjCInterfaceDecl *ObjCMessageExpr::getReceiverInterface() const {
311 QualType T = getReceiverType();
312
313 if (const ObjCObjectPointerType *Ptr = T->getAs<ObjCObjectPointerType>())
314 return Ptr->getInterfaceDecl();
315
316 if (const ObjCObjectType *Ty = T->getAs<ObjCObjectType>())
317 return Ty->getInterface();
318
319 return nullptr;
320}
321
322Stmt::child_range ObjCMessageExpr::children() {
323 Stmt **begin;
324 if (getReceiverKind() == Instance)
325 begin = reinterpret_cast<Stmt **>(getTrailingObjects<void *>());
326 else
327 begin = reinterpret_cast<Stmt **>(getArgs());
328 return child_range(begin,
329 reinterpret_cast<Stmt **>(getArgs() + getNumArgs()));
330}
331
332Stmt::const_child_range ObjCMessageExpr::children() const {
333 return const_cast<ObjCMessageExpr *>(this)->children();
334}
335
336StringRef ObjCBridgedCastExpr::getBridgeKindName() const {
337 switch (getBridgeKind()) {
338 case OBC_Bridge:
339 return "__bridge";
340 case OBC_BridgeTransfer:
341 return "__bridge_transfer";
342 case OBC_BridgeRetained:
343 return "__bridge_retained";
344 }
345
346 llvm_unreachable("Invalid BridgeKind!");
347}
348