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clang-uml/docs/test_cases/t20052.md
Bartek Kryza 632e170ab4 Updated test cases documentation
2024-06-17 22:02:29 +02:00

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# t20052 - Test case for inlining lambda operator calls
## Config
```yaml
diagrams:
t20052_sequence:
type: sequence
glob:
- t20052.cc
include:
namespaces:
- clanguml::t20052
using_namespace: clanguml::t20052
inline_lambda_messages: true
from:
- function: "clanguml::t20052::tmain()"
```
## Source code
File `tests/t20052/t20052.cc`
```cpp
#include <algorithm>
#include <functional>
#include <memory>
#include <optional>
#include <utility>
#include <vector>
namespace clanguml {
namespace t20052 {
struct A {
void a() { aa(); }
void aa() { aaa(); }
void aaa() { }
};
struct B {
void b() { bb(); }
void bb() { bbb(); }
void bbb() { }
void eb() { }
};
struct C {
void c() { cc(); }
void cc() { ccc(); }
void ccc() { }
};
struct D {
int add5(int arg) const { return arg + 5; }
};
class E {
std::optional<std::shared_ptr<B>> maybe_b;
std::shared_ptr<A> a;
public:
template <typename F> void setup(F &&f) { f(maybe_b); }
};
template <typename F> struct R {
R(F &&f)
: f_{std::move(f)}
{
}
void r() { f_(); }
F f_;
};
void tmain()
{
A a;
B b;
C c;
// The activity shouldn't be marked at the lambda definition, but
// wherever it is actually called...
auto alambda = [&a, &b]() {
a.a();
b.b();
};
// ...like here
alambda();
// There should be no call to B in the sequence diagram as the blambda
// is never called
[[maybe_unused]] auto blambda = [&b]() { b.b(); };
// Nested lambdas should also work
auto clambda = [alambda, &c]() {
c.c();
alambda();
};
clambda();
R r{[&c]() { c.c(); }};
r.r();
D d;
std::vector<int> ints{0, 1, 2, 3, 4};
std::transform(ints.begin(), ints.end(), ints.begin(),
[&d](auto i) { return d.add5(i); });
// TODO: Fix naming function call arguments which are lambdas
// E e;
//
// e.setup([](auto &&arg) mutable {
// // We cannot know here what 'arg' might be
// arg.value()->eb();
// });
}
}
}
```
## Generated PlantUML diagrams
![t20052_sequence](./t20052_sequence.svg "Test case for inlining lambda operator calls")
## Generated Mermaid diagrams
![t20052_sequence](./t20052_sequence_mermaid.svg "Test case for inlining lambda operator calls")
## Generated JSON models
```json
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"name": "t20052_sequence",
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"translation_unit": "t20052.cc"
},
"type": "function"
},
{
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},
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},
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},
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}
],
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}
```
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