# t00101 - Test case for strategy design pattern using static polymorphism
## Config
```yaml
diagrams:
  t00101_class:
    type: class
    glob:
      - t00101.cc
    include:
      namespaces:
        - clanguml::t00101
    using_namespace: clanguml::t00101
```
## Source code
File `tests/t00101/t00101.cc`
```cpp
#include <concepts>
#include <memory>
#include <string>
#include <vector>

namespace clanguml {
namespace t00101 {

// Strategy pattern implementation using static polymorphism with C++20 concepts

// Example context: Text processing with different formatting strategies

// C++20 concept for Strategy interface using static polymorphism
template <typename T>
concept FormattingStrategyConcept = requires(T t, const std::string &text) {
    { t.format(text) } -> std::same_as<std::string>;
    { t.get_name() } -> std::same_as<std::string>;
};

// Template base for concrete strategies (CRTP)
template <typename Derived> class FormattingStrategyBase {
public:
    std::string format(const std::string &text)
    {
        return static_cast<Derived *>(this)->format_impl(text);
    }

    std::string get_name()
    {
        return static_cast<Derived *>(this)->get_name_impl();
    }

protected:
    FormattingStrategyBase() = default;
};

// Concrete Strategy for plain text formatting
class PlainTextStrategy : public FormattingStrategyBase<PlainTextStrategy> {
public:
    std::string format_impl(const std::string &text) { return text; }

    std::string get_name_impl() { return "PlainText"; }
};

// Concrete Strategy for markdown formatting
class MarkdownStrategy : public FormattingStrategyBase<MarkdownStrategy> {
public:
    std::string format_impl(const std::string &text)
    {
        return "# " + text + "\n";
    }

    std::string get_name_impl() { return "Markdown"; }
};

// Context template using static polymorphism and C++20 concepts
template <FormattingStrategyConcept StrategyType> class TextProcessor {
public:
    explicit TextProcessor(StrategyType &strategy)
        : strategy_(strategy)
    {
    }

    std::string process_text(const std::string &text)
    {
        return strategy_.format(text);
    }

    std::string get_strategy_name() { return strategy_.get_name(); }

    void set_strategy(StrategyType &new_strategy) { strategy_ = new_strategy; }

private:
    StrategyType &strategy_;
};

// Client code demonstrating the Strategy pattern with static polymorphism
class DocumentProcessor {
public:
    std::string process_as_plain_text(const std::string &content)
    {
        PlainTextStrategy strategy;
        TextProcessor processor(strategy);
        return processor.process_text(content);
    }

    std::string process_as_markdown(const std::string &content)
    {
        MarkdownStrategy strategy;
        TextProcessor processor(strategy);
        return processor.process_text(content);
    }

    template <FormattingStrategyConcept StrategyType>
    std::string process_with_custom_strategy(
        const std::string &content, StrategyType &strategy)
    {
        TextProcessor processor(strategy);
        return processor.process_text(content);
    }
};

// Factory for creating different strategies
class StrategyFactory {
public:
    enum class StrategyType { PlainText, Markdown };

    static std::unique_ptr<PlainTextStrategy> create_plain_text_strategy()
    {
        return std::make_unique<PlainTextStrategy>();
    }

    static std::unique_ptr<MarkdownStrategy> create_markdown_strategy()
    {
        return std::make_unique<MarkdownStrategy>();
    }
};

} // namespace t00101
} // namespace clanguml
```
## Generated PlantUML diagrams
![t00101_class](./t00101_class.svg "Test case for strategy design pattern using static polymorphism")
## Generated Mermaid diagrams
![t00101_class](./t00101_class_mermaid.svg "Test case for strategy design pattern using static polymorphism")
## Generated JSON models
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          "is_defaulted": false,
          "is_deleted": false,
          "is_move_assignment": false,
          "is_noexcept": false,
          "is_operator": false,
          "is_pure_virtual": false,
          "is_static": true,
          "is_virtual": false,
          "name": "create_markdown_strategy",
          "parameters": [],
          "source_location": {
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            "file": "t00101.cc",
            "line": 113,
            "translation_unit": "t00101.cc"
          },
          "template_parameters": [],
          "type": "std::unique_ptr<MarkdownStrategy>"
        }
      ],
      "name": "StrategyFactory",
      "namespace": "clanguml::t00101",
      "source_location": {
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        "file": "t00101.cc",
        "line": 104,
        "translation_unit": "t00101.cc"
      },
      "template_parameters": [],
      "type": "class"
    },
    {
      "constants": [
        "PlainText",
        "Markdown"
      ],
      "display_name": "StrategyFactory::StrategyType",
      "id": "5068471644211142180",
      "is_nested": true,
      "name": "StrategyFactory##StrategyType",
      "namespace": "clanguml::t00101",
      "source_location": {
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        "file": "t00101.cc",
        "line": 106,
        "translation_unit": "t00101.cc"
      },
      "type": "enum"
    }
  ],
  "name": "t00101_class",
  "package_type": "namespace",
  "relationships": [
    {
      "access": "public",
      "destination": "5704419823270881204",
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  "using_namespace": "clanguml::t00101"
}
```
## Generated GraphML models
```xml
<?xml version="1.0"?>
<graphml xmlns="http://graphml.graphdrawing.org/xmlns" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://graphml.graphdrawing.org/xmlns http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd">
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 <key attr.name="type" attr.type="string" for="edge" id="ed0" />
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 <key attr.name="label" attr.type="string" for="edge" id="ed2" />
 <key attr.name="url" attr.type="string" for="edge" id="ed3" />
 <graph id="g0" edgedefault="directed" parse.nodeids="canonical" parse.edgeids="canonical" parse.order="nodesfirst">
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  </node>
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   <data key="nd2"><![CDATA[FormattingStrategyBase<Derived>]]></data>
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   <data key="nd2"><![CDATA[TextProcessor<FormattingStrategyConcept StrategyType>]]></data>
   <data key="nd6">true</data>
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 </graph>
</graphml>

```