std::调用没有匹配的重载函数在VS 2015中发现错误

std::invoke no matching overloaded function found error given in VS 2015

本文关键字:VS 2015 发现 错误 函数 调用 std 重载      更新时间:2023-10-16

我是c++和SDL的新手,我试图创建一个不断更新屏幕的线程,但我一直得到以下错误:

` std:: `没有找到匹配的重载函数`

"特化函数模板失败" unknown-type std::invoke(Callable &&, _type &&…)"

main.cpp

  int main(int argc, char **argv) {
    using namespace std::placeholders;
    bool gameover = false;
    int test;
    std::string filepath = getResourcePath("Lesson1");
    if (SDL_Init(SDL_INIT_EVERYTHING) != 0) {               // Intializes SDL functionality
        std::cout << "Could not start SDL" << std::endl;
        std::cin >> test;
        return 1;
    }
    else {
        std::cout << "SDL started successfully!" << std::endl;
    }
    viewWindow window;                                  // Class representing the window in which the program is run.

    SDL_Renderer *render = window.render();         // Pointer to the renderer used to draw images to the window.
    if (render == nullptr) {
        std::cout << "There was an error creating the renderer" << std::endl << SDL_GetError() << std::endl;
        std::cin >> test;
        return 1;
    }
    SDL_Surface *emptySurface = window.blankSurface();   // Temp surface to draw background to
    if (emptySurface == nullptr) {
        std::cout << "Unable to create a blank surface " << std::endl << SDL_GetError() << std::endl;;
        std::cin >> test;
        return 1;
    }
    surfaces background;
    background.filename = "grass.bmp";
    SDL_Surface *backgroundSurface = background.loadSurface(filepath); 
    if (backgroundSurface == nullptr) {
        std::cout << "Unable to create background surface" << std::endl << SDL_GetError() << std::endl;
        std::cin >> test;
        return 1;
    }
    SDL_Rect backgroundRect;
        SDL_Texture *backTexture = background.blitBack(render, backgroundRect, backgroundSurface, emptySurface);

        player player;
        SDL_Rect playerRect;
        playerRect.x = 320;
        playerRect.y = 240;
        playerRect.h = 16;
        playerRect.w = 16;

        SDL_Texture *playerTexture = player.createPlayerTexture(render, filepath);
        if (playerTexture == nullptr) {
            std::cout << "Could not load player texture" << std::endl << SDL_GetError() << std::endl;
            std::cin >> test;
            return 1;
        }
        while (!gameover) {
            std::thread t((&viewWindow::refreshWindow, render, playerRect, backTexture, playerTexture));
            playerRect.x = player.moveX(playerRect);
            playerRect.y = player.moveY(playerRect);
            t.join();
        }

    return 0;
   }

viewWindow.h

   #pragma once
#ifndef VIEWINDOW_H
#define VIEWWINDOW_H
#include "SDL.h"

class viewWindow                // Class representing the window.
{
private:
    char winName[45] = "Game Test";
    int winWidth = 640;
    int winHeight = 480;
    int xPos = 960;
    int yPos = 540;

public:

     SDL_Window *view();    // Intializing funtions for creating the window and renderer.
     SDL_Renderer *render();
     SDL_Surface *blankSurface();
    void refreshWindow(SDL_Renderer *renderer, SDL_Rect &playerRect, SDL_Texture *backtex, SDL_Texture *playertex);
};

#endif

viewWindow.cpp

   #include "viewWindow.h"
#include <string>
#include "SDL.h"

SDL_Window *viewWindow::view()      
{
    SDL_Window *createdwindow = SDL_CreateWindow(winName, xPos, yPos, winWidth, winHeight, SDL_WINDOW_SHOWN);
    return createdwindow;
}
SDL_Renderer *viewWindow::render() {
    SDL_Renderer *render = SDL_CreateRenderer(view(), -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
    return render;
}
SDL_Surface *viewWindow::blankSurface() {
    SDL_Surface *blacksurface = SDL_CreateRGBSurface(0, winWidth, winHeight, 32, 0, 0, 0, 0);
    return blacksurface;
}
void  viewWindow::refreshWindow(SDL_Renderer *renderer, SDL_Rect &playerRect, SDL_Texture *backtex, SDL_Texture *playertex) {
    while (true) {
        SDL_RenderClear(renderer);
        SDL_RenderCopy(renderer, backtex, NULL, NULL);
        SDL_RenderCopy(renderer, playertex, NULL, &playerRect);
        SDL_RenderPresent(renderer);
    }
}

方法refreshWindow不是staticstd::invoke需要viewWindow类的对象实例调用这个方法。您应该将它作为第二个参数传递给thread构造函数:

std::thread t(&viewWindow::refreshWindow, window, render, std::ref(playerRect), backTexture, playerTexture);   

你可以用lambda函数代替函数指针:

std::thread t([&](viewWindow* view){ view->refreshWindow(render, playerRect, backTexture, playerTexture); }, &window);