Function test_bind_front

dlib/test/invoke.cpp:457–470

    };

    void test_bind_front()
    {
        // Pure function
        static_assert(dlib::bind_front(test_bind_func, 50)(3) == 47, "this should be constexpr");
        DLIB_TEST(dlib::bind_front(test_bind_func, 50)(3) == 47);

        // Member function
        static_assert(dlib::bind_front(&test_bind_func_class::minus, test_bind_func_class{50})(3) == 47, "this should be constexpr");
        DLIB_TEST(dlib::bind_front(&test_bind_func_class::minus, test_bind_func_class{50})(3) == 47);
        DLIB_TEST(dlib::bind_front(&test_bind_func_class::minus, std::make_shared<test_bind_func_class>(50))(3) == 47);

        // Lambda
        DLIB_TEST(dlib::bind_front([](int a, int b) {return a - b;}, 50)(3) == 47);
    }

    void test_bind_back()
    {