| 411 | |
| 412 | template<template<class...> class Function, class Storage> |
| 413 | void test_member_pointer() |
| 414 | { |
| 415 | { |
| 416 | member_function obj; |
| 417 | |
| 418 | Function<Storage, void(member_function&, int&)> f{&member_function::increment}; |
| 419 | DLIB_TEST(f); |
| 420 | int a = 0; |
| 421 | f(obj, a); |
| 422 | DLIB_TEST(a == 1); |
| 423 | |
| 424 | f = nullptr; |
| 425 | DLIB_TEST(!f); |
| 426 | f = &member_function::increment; |
| 427 | DLIB_TEST(f); |
| 428 | f(obj, a); |
| 429 | DLIB_TEST(a == 2); |
| 430 | } |
| 431 | |
| 432 | /*! Use std::mem_fn !*/ |
| 433 | { |
| 434 | member_function obj; |
| 435 | |
| 436 | Function<Storage, void(member_function&, int&)> f{std::mem_fn(&member_function::increment)}; |
| 437 | DLIB_TEST(f); |
| 438 | int a = 0; |
| 439 | f(obj, a); |
| 440 | DLIB_TEST(a == 1); |
| 441 | |
| 442 | f = nullptr; |
| 443 | DLIB_TEST(!f); |
| 444 | f = std::mem_fn(&member_function::increment); |
| 445 | DLIB_TEST(f); |
| 446 | f(obj, a); |
| 447 | DLIB_TEST(a == 2); |
| 448 | } |
| 449 | |
| 450 | /*! Use std::bind !*/ |
| 451 | { |
| 452 | using namespace std::placeholders; |
| 453 | |
| 454 | member_function obj; |
| 455 | |
| 456 | Function<Storage, void(int&)> f{std::bind(&member_function::increment, obj, _1)}; |
| 457 | DLIB_TEST(f); |
| 458 | int a = 0; |
| 459 | f(a); |
| 460 | DLIB_TEST(a == 1); |
| 461 | |
| 462 | f = nullptr; |
| 463 | DLIB_TEST(!f); |
| 464 | f = std::bind(&member_function::increment, obj, _1); |
| 465 | DLIB_TEST(f); |
| 466 | f(a); |
| 467 | DLIB_TEST(a == 2); |
| 468 | } |
| 469 | } |
| 470 | |