# t00012 - Advanced template instantiations
## Config
```yaml
compilation_database_dir: ..
output_directory: diagrams
diagrams:
  t00012_class:
    type: class
    glob:
      - ../../tests/t00012/t00012.cc
    using_namespace:
      - clanguml::t00012
    include:
      namespaces:
        - clanguml::t00012
    plantuml:
      after:
        - 'note right of @A(C<std::map<int,std::vector<std::vector<std::vector<std::string>>>>,3,3,3>) : Long template annotation'

```
## Source code
File t00012.cc
```cpp
#include <algorithm>
#include <array>
#include <map>
#include <string>
#include <variant>
#include <vector>

namespace clanguml {
namespace t00012 {

template <typename T, typename... Ts> class A {
    T value;
    std::variant<Ts...> values;
};

template <int... Is> class B {
    std::array<int, sizeof...(Is)> ints;
};

template <typename T, int... Is> class C {
    std::array<T, sizeof...(Is)> ints;
};

class R {
    A<int, std::string, float> a1;
    A<int, std::string, bool> a2;

    B<3, 2, 1> b1;
    B<1, 1, 1, 1> b2;

    C<std::map<int, std::vector<std::vector<std::vector<std::string>>>>, 3, 3,
        3>
        c1;
};
} // namespace t00012
} // namespace clanguml

```
## Generated PlantUML diagrams
![t00012_class](./t00012_class.svg "Advanced template instantiations")
## Generated Mermaid diagrams
![t00012_class](./t00012_class_mermaid.svg "Advanced template instantiations")
## Generated JSON models
```json
{
  "diagram_type": "class",
  "elements": [
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      "is_union": false,
      "members": [
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          "name": "value",
          "source_location": {
            "column": 7,
            "file": "../../tests/t00012/t00012.cc",
            "line": 12,
            "translation_unit": "../../tests/t00012/t00012.cc"
          },
          "type": "T"
        },
        {
          "access": "private",
          "is_static": false,
          "name": "values",
          "source_location": {
            "column": 25,
            "file": "../../tests/t00012/t00012.cc",
            "line": 13,
            "translation_unit": "../../tests/t00012/t00012.cc"
          },
          "type": "std::variant<Ts...>"
        }
      ],
      "methods": [],
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      "namespace": "clanguml::t00012",
      "source_location": {
        "column": 45,
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        "translation_unit": "../../tests/t00012/t00012.cc"
      },
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        {
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        }
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        }
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  "metadata": {
    "clang_uml_version": "0.4.0-2-g4ab0d29",
    "llvm_version": "Ubuntu clang version 16.0.6 (++20230710042027+7cbf1a259152-1~exp1~20230710162048.105)",
    "schema_version": 1
  },
  "name": "t00012_class",
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}
```