clang-uml/docs/test_cases/t20018.md

t20018 - Recursive template sequence diagram test case

Config

compilation_database_dir: ..
output_directory: puml
diagrams:
  t20018_sequence:
    type: sequence
    glob:
      - ../../tests/t20018/t20018.cc
    include:
      namespaces:
        - clanguml::t20018
    using_namespace:
      - clanguml::t20018
    start_from:
      - function: "clanguml::t20018::tmain()"

Source code

File t20018.cc

#include <iostream>

namespace clanguml {
namespace t20018 {

template <int N> struct Factorial {
    static const int value = N * Factorial<N - 1>::value;

    static void print(int answer) { Factorial<N - 1>::print(answer); }
};

template <> struct Factorial<0> {
    static const int value = 1;

    static void print(int answer)
    {
        std::cout << "The answer is " << answer << "\n";
    }
};

template <typename T, int N = T::value> struct Answer {
    static void print() { T::print(N); }
};

void tmain() { Answer<Factorial<5>>::print(); }
}
}

Generated UML diagrams