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[TinyPtrVector] Add erase method and const-goodness.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152107 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Argyrios Kyrtzidis 2012-03-06 07:14:58 +00:00
parent 0db235a2b0
commit bb07f21c76
1 changed files with 27 additions and 4 deletions
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31
include/llvm/ADT/TinyPtrVector.h
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@ -63,8 +63,10 @@ public:
return Val.template get<VecTy*>()->size();
}
typedef const EltTy *iterator;
iterator begin() const {
typedef const EltTy *const const_iterator;
typedef EltTy *iterator;
iterator begin() {
if (empty())
return 0;
@ -74,7 +76,7 @@ public:
return Val.template get<VecTy *>()->begin();
}
iterator end() const {
iterator end() {
if (empty())
return 0;
@ -84,7 +86,14 @@ public:
return Val.template get<VecTy *>()->end();
}
const_iterator begin() const {
return (const_iterator)const_cast<TinyPtrVector*>(this)->begin();
}
const_iterator end() const {
return (const_iterator)const_cast<TinyPtrVector*>(this)->end();
}
EltTy operator[](unsigned i) const {
assert(!Val.isNull() && "can't index into an empty vector");
if (EltTy V = Val.template dyn_cast<EltTy>()) {
@ -133,6 +142,20 @@ public:
}
// Otherwise, we're already empty.
}
iterator erase(iterator I) {
// If we have a single value, convert to empty.
if (Val.template is<EltTy>()) {
if (I == begin())
Val = (EltTy)0;
} else if (VecTy *Vec = Val.template dyn_cast<VecTy*>()) {
// multiple items in a vector; just do the erase, there is no
// benefit to collapsing back to a pointer
return Vec->erase(I);
}
return 0;
}
private:
void operator=(const TinyPtrVector&); // NOT IMPLEMENTED YET.