# t20030 - Constructor and operator call test case
## Config
```yaml
compilation_database_dir: ..
output_directory: puml
diagrams:
  t20030_sequence:
    type: sequence
    glob:
      - ../../tests/t20030/t20030.cc
    include:
      namespaces:
        - clanguml::t20030
    using_namespace:
      - clanguml::t20030
    start_from:
      - function: "clanguml::t20030::tmain(int)"
      - function: "clanguml::t20030::tmain(bool,int)"
```
## Source code
File t20030.cc
```cpp
namespace clanguml {
namespace t20030 {

int magic() { return 42; }

class A {
public:
    A() { create(); }

    A(int v) { a_ = v; }

    A &operator=(const A &a)
    {
        set(a.a_);
        return *this;
    }

    A &operator+=(int a)
    {
        add(a);
        return *this;
    }

    int value() const { return a_; }

private:
    void create() { a_ = 0; }

    void add(int a) { a_ += a; }
    void set(int a) { a_ = a; }

    int a_;
};

void tmain(int a)
{
    A an_a{magic()};
    an_a += 1;
}

int tmain(bool f, int a)
{
    auto an_a = A();
    auto an_b = A();
    an_a += 2;
    an_b = an_a;
    return an_b.value();
};

}
}
```
## Generated UML diagrams
![t20030_sequence](./t20030_sequence.svg "Constructor and operator call test case")
## Generated JSON models
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```