Class Counter

tests/fl/stl/assert.cpp:244–251

    FL_SUBCASE("class method checks") {
        class Counter {
        public:
            Counter() : count(0) {}
            void increment() { count++; }
            int get() const { return count; }
        private:
            int count;
        };

        Counter c;
        FL_ASSERT(c.get() == 0, "initial count is zero");