# t00038 - Template instantiation with unexposed nested templates
## Config
```yaml
compilation_database_dir: ..
output_directory: puml
diagrams:
  t00038_class:
    type: class
    generate_packages: true
    glob:
      - ../../tests/t00038/t00038.cc
    using_namespace:
      - clanguml::t00038
    include:
      namespaces:
        - clanguml::t00038
```
## Source code
File t00038.cc
```cpp
#include <map>
#include <string>
#include <type_traits>
#include <vector>

namespace clanguml {
namespace t00038 {

enum class property_t { property_a, property_b, property_c };

struct A {
};
struct B {
};
struct C {
};

struct key_t {
    std::string key;
};

template <typename T> struct map;

template <>
struct map<std::integral_constant<property_t, property_t::property_a>> : A {
};

template <>
struct map<
    std::vector<std::integral_constant<property_t, property_t::property_b>>>
    : B {
};

template <>
struct map<std::map<key_t,
    std::vector<std::integral_constant<property_t, property_t::property_c>>>>
    : C {
};

} // namespace t00038
} // namespace clanguml

```
## Generated UML diagrams
![t00038_class](./t00038_class.svg "Template instantiation with unexposed nested templates")