1 files changed, 218 insertions, 0 deletions

diff --git a/ue5/verwendung.cpp b/ue5/verwendung.cpp
new file mode 100644
index 0000000..b3506c0
--- /dev/null
+++ b/ue5/verwendung.cpp
@@ -0,0 +1,218 @@
+#include <cstddef> // for std::size_t
+#include <cassert> // for assert
+#include <utility> // for std::move
+#include <stdexcept> // for std::out_of_range
+
+struct Person
+{
+        Person (){}
+        virtual int mark(){ return 0; }
+        virtual ~Person(){}
+};
+
+struct Student : Person
+{
+        int m_mark;
+        Student (int mark) :
+                m_mark(mark)
+        {}
+        int mark()
+        {
+                return m_mark;
+        }
+};
+
+struct Pupil : Person
+{
+        int m_mark;
+        Pupil (int mark) :
+                m_mark(mark)
+        {}
+        int mark()
+        {
+                return m_mark;
+        }
+};
+
+#include <memory>
+#include "shared_ptr.hpp"
+
+#ifdef SOLVED_1
+using Ti::shared_ptr;
+using Ti::make_shared;
+using Ti::shared_dynamic_cast;
+#else
+using std::shared_ptr;
+using std::make_shared;
+#endif
+
+#include <array>
+#include "array.hpp"
+
+#ifdef SOLVED_2
+using Ti::array;
+using Ti::make_array;
+#else
+using std::array;
+#endif
+
+#include "mean_mark.hpp"
+#ifdef SOLVED_3
+using Ti::mean_mark;
+using Ti::mean_mark_student;
+using Ti::remove_greater;
+#endif
+
+#include <vector>
+using std::vector;
+
+int main()
+{
+        try {
+                // initialize with new expression
+                shared_ptr<Student> n1 (new Student(5));
+                assert (n1.get() != 0);
+                shared_ptr<Person> n2 (new Person);
+                assert (n2.get() != 0);
+
+                throw 0; // must be exception safe
+        } catch (...)
+        {}
+
+
+        {
+                // derived1 is 0.
+                shared_ptr<Student> derived1;
+                assert(derived1.get() == 0);
+
+                // Other way for object creation
+                derived1 = make_shared<Student>(3);
+                assert(derived1.get() != 0);
+
+                // Call object member
+                derived1->mark();
+
+                // Object creation with constructor parameters
+                shared_ptr<Student> derived2 = make_shared<Student>(4);
+                assert (derived2.get() != 0);
+
+                shared_ptr<Person> base1 = make_shared<Person>();
+                assert (base1.get() != 0);
+
+                // Implicit upcast possible. The object make_sharedd in the previous line is
+                // destroyed, because there are no more pointers referencing it.
+                base1 = derived1;
+
+#ifdef SOLVED_1
+                // Explicit downcast possible. Some casts that are available: constCast,
+                // staticCast, dynamicCast
+                derived2 = shared_dynamic_cast<Student>(base1);
+
+                // You can compare pointers.
+                assert(derived1 == derived2);
+#endif
+
+                // Destroy most references to derived instance. References
+                // (but not the object itself) are destroyed if they go out
+                // of scope, or you can force reference destruction by multiple ways.
+                derived1.reset();     // release reference
+                assert(derived1.get() == 0);
+        }
+
+
+        {
+                // array<int, 0> x; // Should fail with static assertion
+
+                typedef array<shared_ptr<Student>, 5> sarray;
+                sarray a;
+                a [0] = shared_ptr<Student>(new Student(2));
+                a [1] = shared_ptr<Student>(new Student(1));
+                a [2] = shared_ptr<Student>(new Student(5));
+                a [3] = shared_ptr<Student>(new Student(4));
+                a [4] = shared_ptr<Student>();
+                assert(a[0].get() != 0);
+                assert(a[4].get() == 0);
+                a [4] = shared_ptr<Student>(new Student(4));
+
+                try {
+                        a.at(5); // throws exception
+                        assert(0);
+                } catch (std::out_of_range const& oor) {
+                        oor.what();
+                } catch (...) {
+                        assert(0);
+                }
+
+#ifdef SOLVED_2
+                array<int,3> a1 = make_array<int,3>();
+                a1.fill(3);
+
+                array<int,3> a2 = make_array<int,3>();
+                a2.fill(4);
+
+                a1.swap(a2);
+                assert(a1[0] == 4);
+                assert(a2[2] == 3);
+#endif
+
+#ifdef SOLVED_3
+                double mean = mean_mark(a.begin(), a.end());
+                assert (mean >= 3.1 || mean <= 3.3);
+
+                double mean_student = mean_mark_student(a.begin(), a.end());
+                assert (mean_student >= 3.1 || mean_student <= 3.3);
+
+                sarray::iterator end = remove_greater(a.begin(), a.end(), 3);
+                double mean2 = mean_mark(a.begin(), end);
+                assert (mean2 >= 1.4 || mean2 <= 1.6);
+#endif
+        }
+
+
+        {
+                typedef array<shared_ptr<Person>, 5> parray;
+                parray m;
+                m [0] = shared_ptr<Student>(new Student(2));
+                m [1] = shared_ptr<Pupil>(new Pupil(1));
+                m [2] = shared_ptr<Student>(new Student(5));
+                m [3] = shared_ptr<Student>(new Student(4));
+                m [4] = shared_ptr<Person>(new Person());
+
+#ifdef SOLVED_3
+                double mean = mean_mark(m.begin(), m.end());
+                assert (mean >= 2.3 || mean <= 2.5);
+
+                double mean_student = mean_mark_student(m.begin(), m.end());
+                assert (mean_student >= 3.6 || mean_student <= 3.8);
+
+                parray::iterator end = remove_greater(m.begin(), m.end(), 3);
+                double mean2 = mean_mark(m.begin(), end);
+                assert (mean2 >= 0.9 || mean2 <= 1.1);
+#endif
+        }
+
+        {
+                vector<shared_ptr<Person>> m;
+                m.push_back(shared_ptr<Student>(new Student(2)));
+                m.push_back(shared_ptr<Pupil>(new Pupil(1)));
+                m.push_back(shared_ptr<Student>(new Student(5)));
+                m.push_back(shared_ptr<Student>(new Student(4)));
+                m.push_back(shared_ptr<Person>(new Person()));
+
+#ifdef SOLVED_3
+                double mean = mean_mark(m.begin(), m.end());
+                assert (mean >= 2.3 || mean <= 2.5);
+
+                double mean_student = mean_mark_student(m.begin(), m.end());
+                assert (mean_student >= 3.6 || mean_student <= 3.8);
+
+                assert(m.size() == 5);
+                m.erase(remove_greater(m.begin(), m.end(), 3), m.end());
+                assert(m.size() == 3);
+
+                double mean2 = mean_mark(m.begin(), m.end());
+                assert (mean2 >= 0.9 || mean2 <= 1.1);
+#endif
+        }
+
+}