Method increment

tests/test_methods_and_attributes.cpp:180–180

Exercises cpp_function(Return (Class::*)(Args...) & noexcept, ...)

    void set_value(int v) noexcept { m_value = v; }
    // Exercises cpp_function(Return (Class::*)(Args...) & noexcept, ...)
    void increment() & noexcept { ++m_value; }
    // Exercises cpp_function(Return (Class::*)(Args...) const & noexcept, ...)
    int capped_value() const & noexcept { return m_value < 100 ? m_value : 100; }