OkraExampleWithLambda.cpp

#define Example(name, body) Example_(name, body, __COUNTER__)
#define Example_(name, body, counter) Example__(name, body, counter)
#define Example__(name, body, counter)                                                  \
    struct ExampleInitializer##counter                                                  \
    {                                                                                   \
        ExampleInitializer##counter()                                                   \
        {                                                                               \
            allExamples.Add({__FILE__, name, body});                                    \
        }                                                                               \
    } ExampleInitializer##counter##Instance;                                            \

Example("it multiplies two numbers", []
{
    auto testSubject = Calculator();
    auto result = testSubject.Multiply(6, 9);
    Assert(result == 42);
});