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[tinyptrvector] Add in a MutableArrayRef implicit conversion operator to complement the ArrayRef implicit conversion operator.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226428 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Gottesman 2015-01-19 03:25:33 +00:00
parent d09c0db8a9
commit eb71fa415e
2 changed files with 30 additions and 0 deletions
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9
include/llvm/ADT/TinyPtrVector.h
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@ -116,6 +116,15 @@ public:
return *Val.template get<VecTy*>();
}
// implicit conversion operator to MutableArrayRef.
operator MutableArrayRef<EltTy>() {
if (Val.isNull())
return None;
if (Val.template is<EltTy>())
return *Val.getAddrOfPtr1();
return *Val.template get<VecTy*>();
}
bool empty() const {
// This vector can be empty if it contains no element, or if it
// contains a pointer to an empty vector.

21
unittests/ADT/TinyPtrVectorTest.cpp
View File

@ -438,3 +438,24 @@ TEST(TinyPtrVectorTest, ArrayRefCtorTest) {
EXPECT_TRUE(V[i] == data[i]);
}
}
TEST(TinyPtrVectorTest, MutableArrayRefTest) {
int data_array[128];
std::vector<int *> data;
for (unsigned i = 0, e = 128; i != e; ++i) {
data_array[i] = 324 - int(i);
data.push_back(&data_array[i]);
}
TinyPtrVector<int *> V(data);
EXPECT_TRUE(V.size() == 128);
EXPECT_FALSE(V.empty());
MutableArrayRef<int *> mut_array = V;
for (unsigned i = 0, e = 128; i != e; ++i) {
EXPECT_TRUE(mut_array[i] == data[i]);
mut_array[i] = 324 + mut_array[i];
EXPECT_TRUE(mut_array[i] == (324 + data[i]));
}
}