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Utils: Add pointeralgorithm.h

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Change-Id: I3e81bdbf22808efbe1fb5fab13bef24c8f73f404
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
This commit is contained in:
Tobias Hunger
2018-01-18 11:10:03 +01:00
parent 831b84a6fd
commit 0bc100911d
9 changed files with 658 additions and 183 deletions
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95
tests/auto/algorithm/tst_algorithm.cpp
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@@ -48,7 +48,6 @@ private slots:
void contains();
void findOr();
void findOrDefault();
void toRawPointer();
void toReferences();
void take();
};
@@ -476,93 +475,31 @@ void tst_Algorithm::contains()
QList<Struct> structQlist = {2, 4, 6, 8};
QVERIFY(Utils::contains(structQlist, &Struct::isEven));
QVERIFY(!Utils::contains(structQlist, &Struct::isOdd));
std::vector<std::unique_ptr<int>> v2;
v2.emplace_back(std::make_unique<int>(1));
v2.emplace_back(std::make_unique<int>(2));
v2.emplace_back(std::make_unique<int>(3));
v2.emplace_back(std::make_unique<int>(4));
QVERIFY(Utils::contains(v2, [](const std::unique_ptr<int> &ip) { return *ip == 2; }));
QVERIFY(!Utils::contains(v2, [](const std::unique_ptr<int> &ip) { return *ip == 5; }));
// Find pointers in unique_ptrs:
QVERIFY(Utils::contains(v2, v2.back().get()));
int foo = 42;
QVERIFY(!Utils::contains(v2, &foo));
}
void tst_Algorithm::findOr()
{
std::vector<int> v1{1, 2, 3, 4};
QCOMPARE(Utils::findOr(v1, 6, [](int i) { return i == 2; }), 2);
QCOMPARE(Utils::findOr(v1, 6, [](int i) { return i == 5; }), 6);
std::vector<std::unique_ptr<int>> v2;
v2.emplace_back(std::make_unique<int>(1));
v2.emplace_back(std::make_unique<int>(2));
v2.emplace_back(std::make_unique<int>(3));
v2.emplace_back(std::make_unique<int>(4));
int def = 6;
QCOMPARE(Utils::findOr(v2, &def, [](const std::unique_ptr<int> &ip) { return *ip == 2; }), v2.at(1).get());
QCOMPARE(Utils::findOr(v2, &def, [](const std::unique_ptr<int> &ip) { return *ip == 5; }), &def);
std::vector<std::unique_ptr<Struct>> v3;
v3.emplace_back(std::make_unique<Struct>(1));
v3.emplace_back(std::make_unique<Struct>(3));
v3.emplace_back(std::make_unique<Struct>(5));
v3.emplace_back(std::make_unique<Struct>(7));
Struct defS(6);
QCOMPARE(Utils::findOr(v3, &defS, &Struct::isOdd), v3.at(0).get());
QCOMPARE(Utils::findOr(v3, &defS, &Struct::isEven), &defS);
std::vector<std::shared_ptr<Struct>> v4;
v4.emplace_back(std::make_shared<Struct>(1));
v4.emplace_back(std::make_shared<Struct>(3));
v4.emplace_back(std::make_shared<Struct>(5));
v4.emplace_back(std::make_shared<Struct>(7));
std::shared_ptr<Struct> sharedDefS = std::make_shared<Struct>(6);
QCOMPARE(Utils::findOr(v4, sharedDefS, &Struct::isOdd), v4.at(0));
QCOMPARE(Utils::findOr(v4, sharedDefS, &Struct::isEven), sharedDefS);
QCOMPARE(Utils::findOr(v1, 10, [](int i) { return i == 2; }), 2);
QCOMPARE(Utils::findOr(v1, 10, [](int i) { return i == 5; }), 10);
}
void tst_Algorithm::findOrDefault()
{
std::vector<int> v1{1, 2, 3, 4};
QCOMPARE(Utils::findOrDefault(v1, [](int i) { return i == 2; }), 2);
QCOMPARE(Utils::findOrDefault(v1, [](int i) { return i == 5; }), 0);
std::vector<std::unique_ptr<int>> v2;
v2.emplace_back(std::make_unique<int>(1));
v2.emplace_back(std::make_unique<int>(2));
v2.emplace_back(std::make_unique<int>(3));
v2.emplace_back(std::make_unique<int>(4));
QCOMPARE(Utils::findOrDefault(v2, [](const std::unique_ptr<int> &ip) { return *ip == 2; }), v2.at(1).get());
QCOMPARE(Utils::findOrDefault(v2, [](const std::unique_ptr<int> &ip) { return *ip == 5; }), static_cast<int*>(0));
std::vector<std::unique_ptr<Struct>> v3;
v3.emplace_back(std::make_unique<Struct>(1));
v3.emplace_back(std::make_unique<Struct>(3));
v3.emplace_back(std::make_unique<Struct>(5));
v3.emplace_back(std::make_unique<Struct>(7));
QCOMPARE(Utils::findOrDefault(v3, &Struct::isOdd), v3.at(0).get());
QCOMPARE(Utils::findOrDefault(v3, &Struct::isEven), static_cast<Struct*>(nullptr));
std::vector<std::shared_ptr<Struct>> v4;
v4.emplace_back(std::make_shared<Struct>(1));
v4.emplace_back(std::make_shared<Struct>(3));
v4.emplace_back(std::make_shared<Struct>(5));
v4.emplace_back(std::make_shared<Struct>(7));
QCOMPARE(Utils::findOrDefault(v4, &Struct::isOdd), v4.at(0));
QCOMPARE(Utils::findOrDefault(v4, &Struct::isEven), std::shared_ptr<Struct>());
}
void tst_Algorithm::toRawPointer()
{
const std::vector<std::unique_ptr<Struct>> v;
// same result container
const std::vector<Struct *> x1 = Utils::toRawPointer(v);
// different result container
const std::vector<Struct *> x2 = Utils::toRawPointer<std::vector>(v);
const QVector<Struct *> x3 = Utils::toRawPointer<QVector>(v);
const std::list<Struct *> x4 = Utils::toRawPointer<std::list>(v);
// different fully specified result container
const std::vector<BaseStruct *> x5 = Utils::toRawPointer<std::vector<BaseStruct *>>(v);
const QVector<BaseStruct *> x6 = Utils::toRawPointer<QVector<BaseStruct *>>(v);
{
std::vector<int> v1{1, 2, 3, 4};
QCOMPARE(Utils::findOrDefault(v1, [](int i) { return i == 2; }), 2);
QCOMPARE(Utils::findOrDefault(v1, [](int i) { return i == 5; }), 0);
}
{
std::vector<std::shared_ptr<Struct>> v4;
v4.emplace_back(std::make_shared<Struct>(1));
v4.emplace_back(std::make_shared<Struct>(3));
v4.emplace_back(std::make_shared<Struct>(5));
v4.emplace_back(std::make_shared<Struct>(7));
QCOMPARE(Utils::findOrDefault(v4, &Struct::isOdd), v4.at(0));
QCOMPARE(Utils::findOrDefault(v4, &Struct::isEven), std::shared_ptr<Struct>());
}
}
void tst_Algorithm::toReferences()