# t00044 - Test case for inner type aliases with parent class template args
## Config
```yaml
diagrams:
  t00044_class:
    type: class
    generate_packages: true
    glob:
      - t00044.cc
    using_namespace: clanguml::t00044
    include:
      namespaces:
        - clanguml::t00044
```
## Source code
File `tests/t00044/t00044.cc`
```cpp
// Inspired by skypjack/entt signal handlers
namespace clanguml::t00044 {

template <typename T> class sink;

template <typename T, typename A> struct signal_handler;

template <typename Ret, typename... Args, typename A>
class sink<signal_handler<Ret(Args...), A>> {
    using signal_t = signal_handler<Ret(Args...), A>;

public:
    sink(signal_t &sh)
        : signal{&sh}
    {
    }

    template <typename CastTo> CastTo *get_signal() { return (CastTo *)signal; }

private:
    signal_t *signal;
};

template <typename Ret, typename... Args, typename A>
struct signal_handler<Ret(Args...), A> { };

template <typename Ret, typename... Args, typename A>
sink(signal_handler<Ret(Args...), A> &)
    -> sink<signal_handler<Ret(Args...), A>>;

signal_handler<void(int), bool> int_handler;

struct R {
    sink<signal_handler<void(int), bool>> sink1{int_handler};
};

} // namespace clanguml::t00044

```
## Generated PlantUML diagrams
![t00044_class](./t00044_class.svg "Test case for inner type aliases with parent class template args")
## Generated Mermaid diagrams
![t00044_class](./t00044_class_mermaid.svg "Test case for inner type aliases with parent class template args")
## Generated JSON models
```json
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      "is_union": false,
      "members": [],
      "methods": [],
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      "source_location": {
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              "kind": "template_type",
              "name": "Args...",
              "template_parameters": []
            }
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            "line": 21,
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          "source_location": {
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          ],
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        }
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  "package_type": "namespace",
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  "using_namespace": "clanguml::t00044"
}
```