Tablica która przechowuje wskaźniki funkcji

krycha88 · Post Fri Dec 11, 2020 7:28 pm

Potrzebuję przekształcić poniży kod tak aby przechowywał tablicę wskaźników funkcji ale w tej samej klasie.

FrameCallback frames[] = { drawFrame1, drawFrame2, drawFrame3, drawFrame4, drawFrame5 };

void drawFrame1(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) {}

void drawFrame2(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y) {}

Jak to zrobić np. dla takiej klasy:

Code: Select all

class SuplaOled {
 public:
  SuplaOled();

 private:
   void drawFrame1(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
   void drawFrame2(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);

  FrameCallback frames[];
};

Poproszę o jakąś podpowiedź

klew · Post Fri Dec 11, 2020 11:50 pm

Takie coś?
https://stackoverflow.com/questions/317 ... in-a-class

krycha88 · Post Sat Dec 12, 2020 8:59 am

Jakoś nie mogę tego ogarnąć. Znalazłem też takie rozwiązanie
https://stackoverflow.com/questions/340 ... rent-class

SuplaOled.h:

Code: Select all

class SuplaOled : public Supla::Element {
 public:
  SuplaOled();

 private:
   void drawFrame1(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
   void drawFrame2(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);

  std::function<FrameCallback()> frames[2];
};

SuplaOled.cpp

Code: Select all

SuplaOled::SuplaOled() {
  frames[0] = std::bind(&SuplaOled::drawFrame1, this);
  frames[1] = std::bind(&SuplaOled::drawFrame2, this);
}

void SuplaOled::drawFrame1(OLEDDisplay* display, OLEDDisplayUiState* state, int16_t x, int16_t y) {}

void SuplaOled::drawFrame2(OLEDDisplay* display, OLEDDisplayUiState* state, int16_t x, int16_t y) {}

dostaję błąd kompilacji

Code: Select all

src\SuplaOled.cpp:7:13: error: no match for 'operator=' (operand types are 'std::function<void (*())(OLEDDisplay*, OLEDDisplayUiState*, short int, short int)>' and 'std::_Bind_helper<false, void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int), SuplaOled* const>::type {aka std::_Bind<std::_Mem_fn<void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int)>(SuplaOled*)>}')
   frames[0] = std::bind(&SuplaOled::drawFrame1, this);
             ^
src\SuplaOled.cpp:7:13: note: candidates are:
In file included from c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\bits\stl_algo.h:66:0,
                 from c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\algorithm:62,
                 from C:\Users\kryst\.platformio\packages\framework-arduinoespressif8266\cores\esp8266/Arduino.h:238,
                 from .pio\libdeps\GUI_Generic_1M\ESP8266 and ESP32 OLED driver for SSD1306 displays\src/OLEDDisplay.h:36,
                 from .pio\libdeps\GUI_Generic_1M\ESP8266 and ESP32 OLED driver for SSD1306 displays\src/SH1106Wire.h:34,
                 from src\SuplaOled.h:9,
                 from src\SuplaOled.cpp:1:
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2266:7: note: std::function<_Res(_ArgTypes ...)>& std::function<_Res(_ArgTypes ...)>::operator=(const std::function<_Res(_ArgTypes ...)>&) [with _Res = void (*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int); _ArgTypes = {}]
       operator=(const function& __x)
       ^
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2266:7: note:   no known conversion for argument 1 from 'std::_Bind_helper<false, void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int), SuplaOled* const>::type {aka std::_Bind<std::_Mem_fn<void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int)>(SuplaOled*)>}' to 'const std::function<void (*())(OLEDDisplay*, OLEDDisplayUiState*, short int, short int)>&'
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2284:7: note: std::function<_Res(_ArgTypes ...)>& std::function<_Res(_ArgTypes ...)>::operator=(std::function<_Res(_ArgTypes ...)>&&) [with _Res = void (*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int); _ArgTypes = {}]
       operator=(function&& __x)
       ^
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2284:7: note:   no known conversion for argument 1 from 'std::_Bind_helper<false, void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int), SuplaOled* const>::type {aka std::_Bind<std::_Mem_fn<void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int)>(SuplaOled*)>}' to 'std::function<void (*())(OLEDDisplay*, OLEDDisplayUiState*, short int, short int)>&&'
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2298:7: note: std::function<_Res(_ArgTypes ...)>& std::function<_Res(_ArgTypes ...)>::operator=(std::nullptr_t) [with _Res = void (*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int); _ArgTypes = {}; std::nullptr_t = std::nullptr_t]
       operator=(nullptr_t)
       ^
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2298:7: note:   no known conversion for argument 1 from 'std::_Bind_helper<false, void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int), SuplaOled* const>::type {aka std::_Bind<std::_Mem_fn<void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int)>(SuplaOled*)>}' to 'std::nullptr_t'
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2327:2: note: template<class _Functor> std::function<_Res(_ArgTypes ...)>::_Requires<std::__or_<std::is_void<_Tp>, std::is_convertible<std::function<_Res(_ArgTypes ...)>::_Invoke<_Functor>, _Res> >, std::function<_Res(_ArgTypes ...)>&> std::function<_Res(_ArgTypes ...)>::operator=(_Functor&&) [with _Functor = 
_Functor; _Res = void (*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int); _ArgTypes = {}]
  operator=(_Functor&& __f)
  ^
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2327:2: note:   template argument deduction/substitution failed:
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2336:2: note: template<class _Functor> std::function<_Res(_ArgTypes ...)>& std::function<_Res(_ArgTypes ...)>::operator=(std::reference_wrapper<_Tp>) [with _Functor = _Functor; _Res = void (*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int); _ArgTypes = {}]
  operator=(reference_wrapper<_Functor> __f) noexcept
  ^
c:\users\kryst\.platformio\packages\toolchain-xtensa\xtensa-lx106-elf\include\c++\4.8.2\functional:2336:2: note:   template argument deduction/substitution failed:
src\SuplaOled.cpp:7:13: note:   'std::_Bind<std::_Mem_fn<void (SuplaOled::*)(OLEDDisplay*, OLEDDisplayUiState*, short int, short int)>(SuplaOled*)>' is not derived from 'std::reference_wrapper<_Tp>'       
   frames[0] = std::bind(&SuplaOled::drawFrame1, this);

krycha88 · Post Sat Dec 12, 2020 5:05 pm

Rozwiązałem to tak jak umiałem więc wyrzuciłem metody drawFrame1 oraz drawFrame2 za klasę...

SuplaOled.h:

Code: Select all

   void drawFrame1(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
   void drawFrame2(OLEDDisplay *display, OLEDDisplayUiState* state, int16_t x, int16_t y);
   
class SuplaOled : public Supla::Element {
 public:
  SuplaOled();

 private:
  FrameCallback *frames;
};

SuplaOled.cpp:

Code: Select all

SuplaOled::SuplaOled() {
  frames[0] = {drawFrame1};
  frames[1] = {drawFrame2};
}

krycha88 · Post Tue Dec 15, 2020 9:20 pm

Trochę mnie męczy myśl, że nie mogę tego zrobić inaczej

Może ktoś podpowie jak zapisać poniższy przykład tak aby było to w klasie:
https://github.com/ThingPulse/esp8266-o ... o.ino#L137

Próbowałem, ale nic z tego...
https://stackoverflow.com/questions/536 ... prototypes