# t20026 - Virtual method call sequence diagram test case
## Config
```yaml
compilation_database_dir: ..
output_directory: puml
diagrams:
  t20026_sequence:
    type: sequence
    glob:
      - ../../tests/t20026/t20026.cc
    include:
      namespaces:
        - clanguml::t20026
    using_namespace:
      - clanguml::t20026
    start_from:
      - function: "clanguml::t20026::tmain()"
```
## Source code
File t20026.cc
```cpp
namespace clanguml {
namespace t20026 {

struct A {
    virtual void a() { }
};

struct B : public A {
    void a() override { }
};

struct C : public B {
    void a() override { }
};

int tmain()
{
    C *a{};

    dynamic_cast<A *>(a)->a();

    return 0;
}
}
}
```
## Generated UML diagrams
![t20026_sequence](./t20026_sequence.svg "Virtual method call sequence diagram test case")