template< typename CONTAINER > std::clock_t geminate( CONTAINER& cntr )
{
const auto start = std::clock() ;
for( auto iter = cntr.begin() ; iter != cntr.end() ; ++iter, ++iter )
iter = cntr.insert( iter, *iter ) ;
return std::clock() - start ;
}
void MapTestDriver<CONTAINER>::testCase1()
{
// ------------------------------------------------------------------------
// SUPPORT REFERENCES AS 'mapped_type'
//
// Concerns:
//: 1 All bsl map-like containers (map, multimap, unordered_map,
//: unordered_multimap) accept references as 'mapped_type'.
//:
//: 2 Container does not make a copy of the referenced object on insertion.
//:
//: 3 The mapped value copy-assignment operator assigns to the original
//: object and does not rebind the reference.
//:
//: 4 The container copy-assignment operator does not copy mapped values.
//:
//: 5 The container copy constructor does not copy mapped values.
//:
//: 6 The erase operation does not destroy the referenced object.
//
// Plan:
//: 1 Create the value type containing a reference as a 'mapped_type' and
//: insert it into the container. (C-1)
//:
//: 2 Verify that the container inserts the reference and does not make a
//: copy of the referenced object. (C-2)
//:
//: 3 Assign diffenent value to the mapped value and verify that the
//: referenced object is changed. (C-3)
//:
//: 4 Copy-construct new container and verify that the mapped value in the
//: new container references original object. (C-4)
//:
//: 5 Assign the original container to a different container and verify
//: that the mapped value in the new container references original
//: object. (C-4)
//:
//: 5 Erase the container entry and verify that the original object is not
//: destroyed. (C-4)
//
// Testing:
// CONCERN: Support references as 'mapped_type' in map-like containers.
// ------------------------------------------------------------------------
if (verbose) {
cout << "\tTesting with: " << bsls::NameOf<ValueType>().name() << endl;
}
BSLMF_ASSERT(false == bsl::is_reference<KeyType>::value);
BSLMF_ASSERT(true == bsl::is_reference<MappedType>::value);
bslma::TestAllocator scratch("scratch", veryVeryVeryVerbose);
bsls::ObjectBuffer<typename bsl::remove_const<KeyType>::type> tempKey;
TTF::emplace(tempKey.address(), 1, &scratch);
bslma::DestructorGuard<typename bsl::remove_const<KeyType>::type>
keyGuard(tempKey.address());
bsls::ObjectBuffer<typename bsl::remove_reference<MappedType>::type>
tempMapped;
TTF::emplace(tempMapped.address(), 2, &scratch);
bslma::DestructorGuard<typename bsl::remove_reference<MappedType>::type>
mappedGuard(tempMapped.address());
bsls::ObjectBuffer<typename bsl::remove_reference<MappedType>::type>
tempMapped2;
TTF::emplace(tempMapped2.address(), 18, &scratch);
bslma::DestructorGuard<typename bsl::remove_reference<MappedType>::type>
mappedGuard2(tempMapped2.address());
CONTAINER mX; const CONTAINER& X = mX;
ValueType tempPair(tempKey.object(), tempMapped.object());
mX.insert(MoveUtil::move(tempPair));
Iter ret = mX.find(tempKey.object());
ASSERT(ret != mX.end());
// Reference still refers to the original object.
ASSERT(bsls::Util::addressOf(ret->second) == tempMapped.address());
// Assign different value to the mapped.
ret->second = tempMapped2.object();
// Reference still refers to the original object.
ASSERT(bsls::Util::addressOf(ret->second) == tempMapped.address());
ASSERT(tempMapped.object() == tempMapped2.object());
// Copy-construct container.
{
CONTAINER mY(X); const CONTAINER& Y = mY;
CIter ret = Y.find(tempKey.object());
ASSERT(ret != Y.end());
// Reference still refers to the original object.
ASSERT(bsls::Util::addressOf(ret->second) == tempMapped.address());
}
// Copy-assign container.
{
CONTAINER mY; const CONTAINER& Y = mY;
mY = X;
CIter ret = Y.find(tempKey.object());
ASSERT(ret != Y.end());
// Reference still refers to the original object.
ASSERT(bsls::Util::addressOf(ret->second) == tempMapped.address());
}
// Erasing the value.
mX.erase(tempKey.object());
ret = mX.find(tempKey.object());
ASSERT(ret == mX.end());
ASSERT(tempMapped.object() == tempMapped2.object());
cout<< "here3\n";
}