Added template method pattern

docs/test_cases/t00021.md

@@ -35,20 +35,20 @@ public:
 
 class Visitor1 : public Visitor {
 public:
-    void visit_A(const A &item) const override { }
-    void visit_B(const B &item) const override { }
+    void visit_A(const A &item) const override {}
+    void visit_B(const B &item) const override {}
 };
 
 class Visitor2 : public Visitor {
 public:
-    void visit_A(const A &item) const override { }
-    void visit_B(const B &item) const override { }
+    void visit_A(const A &item) const override {}
+    void visit_B(const B &item) const override {}
 };
 
 class Visitor3 : public Visitor {
 public:
-    void visit_A(const A &item) const override { }
-    void visit_B(const B &item) const override { }
+    void visit_A(const A &item) const override {}
+    void visit_B(const B &item) const override {}
 };
 
 class Item {
@@ -59,12 +59,12 @@ public:
 
 class A : public Item {
 public:
-    void accept(const Visitor &visitor) const override { }
+    void accept(const Visitor &visitor) const override {}
 };
 
 class B : public Item {
 public:
-    void accept(const Visitor &visitor) const override { }
+    void accept(const Visitor &visitor) const override {}
 };
 }
 }

docs/test_cases/t00022.md

@@ -0,0 +1,56 @@
+# t00022 - Template method pattern
+## Config
+```yaml
+compilation_database_dir: ..
+output_directory: puml
+diagrams:
+  t00022_class:
+    type: class
+    glob:
+      - ../../tests/t00022/t00022.cc
+    using_namespace:
+      - clanguml::t00022
+    include:
+      namespaces:
+        - clanguml::t00022
+
+```
+## Source code
+File t00022.cc
+```cpp
+#include <memory>
+
+namespace clanguml {
+namespace t00022 {
+
+class A {
+public:
+    void template_method()
+    {
+        method1();
+        method2();
+    }
+
+protected:
+    virtual void method1() = 0;
+    virtual void method2() = 0;
+};
+
+class A1 : public A {
+protected:
+    void method1() override { }
+    void method2() override { }
+};
+
+class A2 : public A {
+protected:
+    void method1() override { }
+    void method2() override { }
+};
+
+}
+}
+
+```
+## Generated UML diagrams
+![t00022_class](./t00022_class.png "Template method pattern")