t00021 - Visitor pattern

Config

diagrams:
  t00021_class:
    type: class
    glob:
      - t00021.cc
    using_namespace: clanguml::t00021
    include:
      namespaces:
        - clanguml::t00021

Source code

File tests/t00021/t00021.cc

#include <memory>
 
namespace clanguml {
namespace t00021 {
 
class A;
class B;
 
class Visitor {
public:
    virtual ~Visitor() = default;
    virtual void visit_A(const A &item) const = 0;
    virtual void visit_B(const B &item) const = 0;
};
 
class Visitor1 : public Visitor {
public:
    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 { }
};
 
class Visitor3 : public Visitor {
public:
    void visit_A(const A &item) const override { }
    void visit_B(const B &item) const override { }
};
 
class Item {
public:
    virtual ~Item() = default;
    virtual void accept(const Visitor &visitor) const = 0;
};
 
class A : public Item {
public:
    void accept(const Visitor &visitor) const override { }
};
 
class B : public Item {
public:
    void accept(const Visitor &visitor) const override { }
};
} // namespace t00021
} // namespace clanguml

Generated PlantUML diagrams

Generated Mermaid diagrams

Generated JSON models

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  "elements": [
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      "is_nested": false,
      "is_struct": false,
      "is_template": false,
      "is_union": false,
      "members": [],
      "methods": [
        {
          "access": "public",
          "display_name": "~Visitor",
          "is_const": false,
          "is_consteval": false,
          "is_constexpr": true,
          "is_constructor": false,
          "is_copy_assignment": false,
          "is_coroutine": false,
          "is_defaulted": true,
          "is_deleted": false,
          "is_move_assignment": false,
          "is_noexcept": false,
          "is_operator": false,
          "is_pure_virtual": false,
          "is_static": false,
          "is_virtual": true,
          "name": "~Visitor",
          "parameters": [],
          "source_location": {
            "column": 13,
            "file": "t00021.cc",
            "line": 11,
            "translation_unit": "t00021.cc"
          },
          "template_parameters": [],
          "type": "void"
        },
        {
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            "line": 12,
            "translation_unit": "t00021.cc"
          },
          "template_parameters": [],
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        },
        {
          "access": "public",
          "display_name": "visit_B",
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          "is_static": false,
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          "name": "visit_B",
          "parameters": [
            {
              "name": "item",
              "type": "const B &"
            }
          ],
          "source_location": {
            "column": 18,
            "file": "t00021.cc",
            "line": 13,
            "translation_unit": "t00021.cc"
          },
          "template_parameters": [],
          "type": "void"
        }
      ],
      "name": "Visitor",
      "namespace": "clanguml::t00021",
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        "line": 9,
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      },
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    {
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      "id": "8226953755203215571",
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      "members": [],
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        {
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      ],
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      },
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  ],
  "name": "t00021_class",
  "package_type": "namespace",
  "relationships": [
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  ],
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}

Generated GraphML models

<?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">
 <key attr.name="id" attr.type="string" for="graph" id="gd0" />
 <key attr.name="diagram_type" attr.type="string" for="graph" id="gd1" />
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 <key attr.name="using_namespace" attr.type="string" for="graph" id="gd3" />
 <key attr.name="id" attr.type="string" for="node" id="nd0" />
 <key attr.name="type" attr.type="string" for="node" id="nd1" />
 <key attr.name="name" attr.type="string" for="node" id="nd2" />
 <key attr.name="stereotype" attr.type="string" for="node" id="nd3" />
 <key attr.name="url" attr.type="string" for="node" id="nd4" />
 <key attr.name="tooltip" attr.type="string" for="node" id="nd5" />
 <key attr.name="is_template" attr.type="boolean" for="node" id="nd6" />
 <key attr.name="type" attr.type="string" for="edge" id="ed0" />
 <key attr.name="access" attr.type="string" for="edge" id="ed1" />
 <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">
  <data key="gd3">clanguml::t00021</data>
  <node id="n0">
   <data key="nd1">class</data>
   <data key="nd2"><![CDATA[Visitor]]></data>
   <data key="nd3">abstract</data>
   <data key="nd6">false</data>
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  <node id="n1">
   <data key="nd1">class</data>
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  </node>
  <node id="n3">
   <data key="nd1">class</data>
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   <data key="nd6">false</data>
  </node>
  <node id="n4">
   <data key="nd1">class</data>
   <data key="nd2"><![CDATA[Item]]></data>
   <data key="nd3">abstract</data>
   <data key="nd6">false</data>
  </node>
  <node id="n5">
   <data key="nd1">class</data>
   <data key="nd2"><![CDATA[A]]></data>
   <data key="nd6">false</data>
  </node>
  <node id="n6">
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