Started work on templates article

2 files changed, 51 insertions, 0 deletions

diff --git a/templates/pair.cpp b/templates/pair.cpp
new file mode 100644
index 0000000..42b97c9
--- /dev/null
+++ b/templates/pair.cpp
@@ -0,0 +1,35 @@
+#include <iostream>
+
+template <typename S, typename T>
+class Pair {
+public:
+        S first;
+        T second;
+
+        Pair(S s, T t) : first{s}, second{t} {}
+
+        void print() const {
+                std::cout << "(" << first << ", " << second << ")";
+        }
+};
+
+int main() {
+        Pair<int, char> p(42, 'x');
+        p.second = 'y';
+
+        std::cout << "p =";
+        p.print();
+        std::cout << std::endl;
+
+        Pair q(1.23, 7); // template argument deduction
+
+        std::cout << "q =";
+        q.print();
+        std::cout << std::endl;
+
+        std::cout << "int type name: " << typeid(7).name() << std::endl;
+        std::cout << "char type name: " << typeid('x').name() << std::endl;
+        std::cout << "double type name: " << typeid(1.23).name() << std::endl;
+        std::cout << "Type of p: " << typeid(p).name() << std::endl;
+        std::cout << "Type of q: " << typeid(q).name() << std::endl;
+}
diff --git a/templates/swap.cpp b/templates/swap.cpp
new file mode 100644
index 0000000..94e231e
--- /dev/null
+++ b/templates/swap.cpp
@@ -0,0 +1,16 @@
+#include <iostream>
+
+template<typename S, typename T>
+void swap(S& a, T& b) {
+        S tmp = a;
+        a = b;
+        b = tmp;
+}
+
+int main() {
+        int x = 3;
+        std::string y = "1.0";
+        swap(x, y);
+        std::cout << "x: " << x << std::endl;
+        std::cout << "y: " << y << std::endl;
+}