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//===--- StmtIterator.cpp - Iterators for Statements ------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines internal methods for StmtIterator.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/StmtIterator.h"
#include "clang/AST/Expr.h"
#include "clang/AST/Decl.h"
using namespace clang;
static inline VariableArrayType* FindVA(Type* t) {
while (ArrayType* vt = dyn_cast<ArrayType>(t)) {
if (VariableArrayType* vat = dyn_cast<VariableArrayType>(vt))
if (vat->getSizeExpr())
return vat;
t = vt->getElementType().getTypePtr();
}
return NULL;
}
void StmtIteratorBase::NextVA() {
assert (getVAPtr());
VariableArrayType* p = getVAPtr();
p = FindVA(p->getElementType().getTypePtr());
setVAPtr(p);
if (!p && decl) {
if (VarDecl* VD = dyn_cast<VarDecl>(decl))
if (VD->Init)
return;
NextDecl();
}
else {
RawVAPtr = 0;
}
}
void StmtIteratorBase::NextDecl(bool ImmediateAdvance) {
assert (inDecl());
assert (getVAPtr() == NULL);
assert (decl);
if (ImmediateAdvance) {
decl = decl->getNextDeclarator();
if (!decl) {
RawVAPtr = 0;
return;
}
}
for ( ; decl ; decl = decl->getNextDeclarator()) {
if (VarDecl* VD = dyn_cast<VarDecl>(decl)) {
if (VariableArrayType* VAPtr = FindVA(VD->getType().getTypePtr())) {
setVAPtr(VAPtr);
return;
}
if (VD->getInit())
return;
}
else if (TypedefDecl* TD = dyn_cast<TypedefDecl>(decl)) {
if (VariableArrayType* VAPtr =
FindVA(TD->getUnderlyingType().getTypePtr())) {
setVAPtr(VAPtr);
return;
}
}
else if (EnumConstantDecl* ECD = dyn_cast<EnumConstantDecl>(decl))
if (ECD->getInitExpr())
return;
}
if (!decl) {
RawVAPtr = 0;
return;
}
}
StmtIteratorBase::StmtIteratorBase(ScopedDecl* d)
: decl(d), RawVAPtr(DeclMode) {
assert (decl);
NextDecl(false);
}
StmtIteratorBase::StmtIteratorBase(VariableArrayType* t)
: decl(NULL), RawVAPtr(SizeOfTypeVAMode) {
RawVAPtr |= reinterpret_cast<uintptr_t>(t);
}
Stmt*& StmtIteratorBase::GetDeclExpr() const {
if (VariableArrayType* VAPtr = getVAPtr()) {
assert (VAPtr->SizeExpr);
return reinterpret_cast<Stmt*&>(VAPtr->SizeExpr);
}
if (VarDecl* VD = dyn_cast<VarDecl>(decl)) {
assert (VD->Init);
return reinterpret_cast<Stmt*&>(VD->Init);
}
EnumConstantDecl* ECD = cast<EnumConstantDecl>(decl);
return reinterpret_cast<Stmt*&>(ECD->Init);
}
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