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Allow for use of arbitrary iterator types...

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12642 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-04-03 23:29:11 +00:00
parent 5da80974c0
commit 43cb041754
1 changed files with 26 additions and 19 deletions
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45
include/llvm/Support/GetElementPtrTypeIterator.h
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@ -19,32 +19,33 @@
#include "llvm/DerivedTypes.h" #include "llvm/DerivedTypes.h"
namespace llvm { namespace llvm {
class gep_type_iterator template<typename ItTy = User::op_iterator>
class generic_gep_type_iterator
: public forward_iterator<const Type *, ptrdiff_t> { : public forward_iterator<const Type *, ptrdiff_t> {
typedef forward_iterator<const Type*, ptrdiff_t> super; typedef forward_iterator<const Type*, ptrdiff_t> super;
User::op_iterator OpIt; ItTy OpIt;
const Type *CurTy; const Type *CurTy;
gep_type_iterator() {} generic_gep_type_iterator() {}
public: public:
static gep_type_iterator begin(const Type *Ty, User::op_iterator It) { static generic_gep_type_iterator begin(const Type *Ty, ItTy It) {
gep_type_iterator I; generic_gep_type_iterator I;
I.CurTy = Ty; I.CurTy = Ty;
I.OpIt = It; I.OpIt = It;
return I; return I;
} }
static gep_type_iterator end(User::op_iterator It) { static generic_gep_type_iterator end(ItTy It) {
gep_type_iterator I; generic_gep_type_iterator I;
I.CurTy = 0; I.CurTy = 0;
I.OpIt = It; I.OpIt = It;
return I; return I;
} }
bool operator==(const gep_type_iterator& x) const { bool operator==(const generic_gep_type_iterator& x) const {
return OpIt == x.OpIt; return OpIt == x.OpIt;
} }
bool operator!=(const gep_type_iterator& x) const { bool operator!=(const generic_gep_type_iterator& x) const {
return !operator==(x); return !operator==(x);
} }
@ -58,7 +59,7 @@ namespace llvm {
Value *getOperand() const { return *OpIt; } Value *getOperand() const { return *OpIt; }
gep_type_iterator& operator++() { // Preincrement generic_gep_type_iterator& operator++() { // Preincrement
if (const CompositeType *CT = dyn_cast<CompositeType>(CurTy)) { if (const CompositeType *CT = dyn_cast<CompositeType>(CurTy)) {
CurTy = CT->getTypeAtIndex(getOperand()); CurTy = CT->getTypeAtIndex(getOperand());
} else { } else {
@ -68,14 +69,16 @@ namespace llvm {
return *this; return *this;
} }
gep_type_iterator operator++(int) { // Postincrement generic_gep_type_iterator operator++(int) { // Postincrement
gep_type_iterator tmp = *this; ++*this; return tmp; generic_gep_type_iterator tmp = *this; ++*this; return tmp;
} }
}; };
typedef generic_gep_type_iterator<> gep_type_iterator;
inline gep_type_iterator gep_type_begin(User *GEP) { inline gep_type_iterator gep_type_begin(User *GEP) {
return gep_type_iterator::begin(GEP->getOperand(0)->getType(), return gep_type_iterator::begin(GEP->getOperand(0)->getType(),
GEP->op_begin()+1); GEP->op_begin()+1);
} }
inline gep_type_iterator gep_type_end(User *GEP) { inline gep_type_iterator gep_type_end(User *GEP) {
return gep_type_iterator::end(GEP->op_end()); return gep_type_iterator::end(GEP->op_end());
@ -87,13 +90,17 @@ namespace llvm {
inline gep_type_iterator gep_type_end(User &GEP) { inline gep_type_iterator gep_type_end(User &GEP) {
return gep_type_iterator::end(GEP.op_end()); return gep_type_iterator::end(GEP.op_end());
} }
inline gep_type_iterator gep_type_begin(const Type *Op0, User::op_iterator I,
User::op_iterator E) { template<typename ItTy>
return gep_type_iterator::begin(Op0, I); inline generic_gep_type_iterator<ItTy>
gep_type_begin(const Type *Op0, ItTy I, ItTy E) {
return generic_gep_type_iterator<ItTy>::begin(Op0, I);
} }
inline gep_type_iterator gep_type_end(const Type *Op0, User::op_iterator I,
User::op_iterator E) { template<typename ItTy>
return gep_type_iterator::end(E); inline generic_gep_type_iterator<ItTy>
gep_type_end(const Type *Op0, ItTy I, ItTy E) {
return generic_gep_type_iterator<ItTy>::end(E);
} }
} // end namespace llvm } // end namespace llvm