小编Asu*_*Asu的帖子

我试图让Irrlicht使用我在X11下使用SDL2创建的窗口,但它在Irrlicht中失败了GLXCreateWindow.

在我的方框中,以下MCVE再现了该问题:

#include <irrlicht/irrlicht.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_syswm.h>

int main()
{
    SDL_Init(SDL_INIT_VIDEO);

    SDL_Window* window = SDL_CreateWindow("Hello",
        SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
        800, 600,
        SDL_WINDOW_OPENGL);

    if (!window)
    {
        return false;
    }

    SDL_SysWMinfo wm_info;
    SDL_VERSION(&wm_info.version);

    if (!SDL_GetWindowWMInfo(window, &wm_info))
    {
        return false;
    }

    irr::SIrrlichtCreationParameters params;
    params.DeviceType = irr::EIDT_BEST;
    params.DriverType = irr::video::EDT_OPENGL;
    params.WindowSize = { 800, 600 };
    params.WindowId = reinterpret_cast<void*>(wm_info.info.x11.window);
    irr::createDeviceEx(params);
}

这会导致以下错误:

Irrlicht Engine version 1.9.0
Linux 4.16.16-1-ck #1 SMP PREEMPT Tue Jun 19 20:30:54 CEST 2018 x86_64
X Error of failed request: …

提供以下代码,在全局范围内,clang-tidy不提供警告:

auto test = []{};

但是,在执行以下操作时,它会:

#include <tuple>

auto test = []{
    std::tuple t{1, 2, 3};
};

<source>:3:6: warning: initialization of 'test' with static storage duration may throw an exception that cannot be caught [cert-err58-cpp]
auto test = []{
     ^

/opt/compiler-explorer/gcc-8.2.0/lib/gcc/x86_64-linux-gnu/8.2.0/../../../../include/c++/8.2.0/tuple:646:19: note: possibly throwing constructor declared here
        constexpr tuple(_UElements&&... __elements)
                  ^

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将lambda标记为noexcept没有用.

但是,我不明白为什么会出现这个问题.异常只能在调用 lambda 时理论上发生,不是吗？

以下代码不会导致出现警告:

auto test = [] {
    throw 0;
};

铿锵有误,还是我错过了什么？