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[llvm-project.git] / clang / lib / Sema / UsedDeclVisitor.h
blob580d702f96fe5ade49912244c7f7135ec3fd2c48
1 //===- UsedDeclVisitor.h - ODR-used declarations visitor --------*- C++ -*-===//
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 // This file defines UsedDeclVisitor, a CRTP class which visits all the
9 // declarations that are ODR-used by an expression or statement.
11 //===----------------------------------------------------------------------===//
13 #ifndef LLVM_CLANG_LIB_SEMA_USEDDECLVISITOR_H
14 #define LLVM_CLANG_LIB_SEMA_USEDDECLVISITOR_H
16 #include "clang/AST/EvaluatedExprVisitor.h"
17 #include "clang/Sema/SemaInternal.h"
19 namespace clang {
20 template <class Derived>
21 class UsedDeclVisitor : public EvaluatedExprVisitor<Derived> {
22 protected:
23 Sema &S;
25 public:
26 typedef EvaluatedExprVisitor<Derived> Inherited;
28 UsedDeclVisitor(Sema &S) : Inherited(S.Context), S(S) {}
30 Derived &asImpl() { return *static_cast<Derived *>(this); }
32 void VisitDeclRefExpr(DeclRefExpr *E) {
33 auto *D = E->getDecl();
34 if (isa<FunctionDecl>(D) || isa<VarDecl>(D)) {
35 asImpl().visitUsedDecl(E->getLocation(), D);
39 void VisitMemberExpr(MemberExpr *E) {
40 auto *D = E->getMemberDecl();
41 if (isa<FunctionDecl>(D) || isa<VarDecl>(D)) {
42 asImpl().visitUsedDecl(E->getMemberLoc(), D);
44 asImpl().Visit(E->getBase());
47 void VisitCapturedStmt(CapturedStmt *Node) {
48 asImpl().visitUsedDecl(Node->getBeginLoc(), Node->getCapturedDecl());
49 Inherited::VisitCapturedStmt(Node);
52 void VisitCXXBindTemporaryExpr(CXXBindTemporaryExpr *E) {
53 asImpl().visitUsedDecl(
54 E->getBeginLoc(),
55 const_cast<CXXDestructorDecl *>(E->getTemporary()->getDestructor()));
56 asImpl().Visit(E->getSubExpr());
59 void VisitCXXNewExpr(CXXNewExpr *E) {
60 if (E->getOperatorNew())
61 asImpl().visitUsedDecl(E->getBeginLoc(), E->getOperatorNew());
62 if (E->getOperatorDelete())
63 asImpl().visitUsedDecl(E->getBeginLoc(), E->getOperatorDelete());
64 Inherited::VisitCXXNewExpr(E);
67 void VisitCXXDeleteExpr(CXXDeleteExpr *E) {
68 if (E->getOperatorDelete())
69 asImpl().visitUsedDecl(E->getBeginLoc(), E->getOperatorDelete());
70 QualType DestroyedOrNull = E->getDestroyedType();
71 if (!DestroyedOrNull.isNull()) {
72 QualType Destroyed = S.Context.getBaseElementType(DestroyedOrNull);
73 if (const RecordType *DestroyedRec = Destroyed->getAs<RecordType>()) {
74 CXXRecordDecl *Record = cast<CXXRecordDecl>(DestroyedRec->getDecl());
75 if (Record->getDefinition())
76 asImpl().visitUsedDecl(E->getBeginLoc(), S.LookupDestructor(Record));
80 Inherited::VisitCXXDeleteExpr(E);
83 void VisitCXXConstructExpr(CXXConstructExpr *E) {
84 asImpl().visitUsedDecl(E->getBeginLoc(), E->getConstructor());
85 CXXConstructorDecl *D = E->getConstructor();
86 for (const CXXCtorInitializer *Init : D->inits()) {
87 if (Init->isInClassMemberInitializer())
88 asImpl().Visit(Init->getInit());
90 Inherited::VisitCXXConstructExpr(E);
93 void VisitCXXDefaultArgExpr(CXXDefaultArgExpr *E) {
94 asImpl().Visit(E->getExpr());
95 Inherited::VisitCXXDefaultArgExpr(E);
98 void VisitCXXDefaultInitExpr(CXXDefaultInitExpr *E) {
99 asImpl().Visit(E->getExpr());
100 Inherited::VisitCXXDefaultInitExpr(E);
103 void VisitInitListExpr(InitListExpr *ILE) {
104 if (ILE->hasArrayFiller())
105 asImpl().Visit(ILE->getArrayFiller());
106 Inherited::VisitInitListExpr(ILE);
109 void visitUsedDecl(SourceLocation Loc, Decl *D) {
110 if (auto *CD = dyn_cast<CapturedDecl>(D)) {
111 if (auto *S = CD->getBody()) {
112 asImpl().Visit(S);
114 } else if (auto *CD = dyn_cast<BlockDecl>(D)) {
115 if (auto *S = CD->getBody()) {
116 asImpl().Visit(S);
121 } // end namespace clang
123 #endif // LLVM_CLANG_LIB_SEMA_USEDDECLVISITOR_H