1 //===- StmtIterator.cpp - Iterators for Statements ------------------------===//
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 defines internal methods for StmtIterator.
12 //===----------------------------------------------------------------------===//
14 #include "clang/AST/StmtIterator.h"
15 #include "clang/AST/Decl.h"
16 #include "clang/AST/Type.h"
17 #include "clang/Basic/LLVM.h"
18 #include "llvm/Support/Casting.h"
22 using namespace clang;
24 // FIXME: Add support for dependent-sized array types in C++?
25 // Does it even make sense to build a CFG for an uninstantiated template?
26 static inline const VariableArrayType *FindVA(const Type* t) {
27 while (const ArrayType *vt = dyn_cast<ArrayType>(t)) {
28 if (const VariableArrayType *vat = dyn_cast<VariableArrayType>(vt))
29 if (vat->getSizeExpr())
32 t = vt->getElementType().getTypePtr();
38 void StmtIteratorBase::NextVA() {
41 const VariableArrayType *p = getVAPtr();
42 p = FindVA(p->getElementType().getTypePtr());
49 if (VarDecl* VD = dyn_cast<VarDecl>(*DGI))
56 assert(inSizeOfTypeVA());
61 void StmtIteratorBase::NextDecl(bool ImmediateAdvance) {
62 assert(getVAPtr() == nullptr);
63 assert(inDeclGroup());
68 for ( ; DGI != DGE; ++DGI)
75 bool StmtIteratorBase::HandleDecl(Decl* D) {
76 if (VarDecl* VD = dyn_cast<VarDecl>(D)) {
77 if (const VariableArrayType* VAPtr = FindVA(VD->getType().getTypePtr())) {
85 else if (TypedefNameDecl* TD = dyn_cast<TypedefNameDecl>(D)) {
86 if (const VariableArrayType* VAPtr =
87 FindVA(TD->getUnderlyingType().getTypePtr())) {
92 else if (EnumConstantDecl* ECD = dyn_cast<EnumConstantDecl>(D)) {
93 if (ECD->getInitExpr())
100 StmtIteratorBase::StmtIteratorBase(Decl** dgi, Decl** dge)
101 : DGI(dgi), RawVAPtr(DeclGroupMode), DGE(dge) {
105 StmtIteratorBase::StmtIteratorBase(const VariableArrayType* t)
106 : DGI(nullptr), RawVAPtr(SizeOfTypeVAMode) {
107 RawVAPtr |= reinterpret_cast<uintptr_t>(t);
110 Stmt*& StmtIteratorBase::GetDeclExpr() const {
111 if (const VariableArrayType* VAPtr = getVAPtr()) {
112 assert(VAPtr->SizeExpr);
113 return const_cast<Stmt*&>(VAPtr->SizeExpr);
116 assert(inDeclGroup());
117 VarDecl* VD = cast<VarDecl>(*DGI);
118 return *VD->getInitAddress();