Use C++ callbacks - Githubissues

@kainino0x I'm looking at using C++ callbacks in this app and while it's working natively with Dawn ToT, it fails with Emscripten ToT with the following error:

$ /Users/fbeaufort/github/emscripten/emcmake cmake -B build-web && cmake --build build-web -j100
configure: cmake -B build-web -DCMAKE_TOOLCHAIN_FILE=/Users/fbeaufort/github/emscripten/cmake/Modules/Platform/Emscripten.cmake -DCMAKE_CROSSCOMPILING_EMULATOR=/opt/homebrew/opt/node/bin/node
-- Configuring done (0.4s)
-- Generating done (0.0s)
-- Build files have been written to: /Users/fbeaufort/github/webgpu-cross-platform-app/build-web
[ 50%] Building CXX object CMakeFiles/app.dir/main.cpp.o
/Users/fbeaufort/github/webgpu-cross-platform-app/main.cpp:35:16: error: cannot initialize a parameter of type 'RequestAdapterCallback' (aka 'void (*)(WGPURequestAdapterStatus, WGPUAdapterImpl *, const char *, void *)') with an rvalue of type 'wgpu::CallbackMode'
   35 |       nullptr, wgpu::CallbackMode::AllowSpontaneous,
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/fbeaufort/github/emscripten/cache/sysroot/include/webgpu/webgpu_cpp.h:977:91: note: passing argument to parameter 'callback' here
  977 |         void RequestAdapter(RequestAdapterOptions const * options, RequestAdapterCallback callback, void * userdata) const;
      |                                                                                           ^
/Users/fbeaufort/github/webgpu-cross-platform-app/main.cpp:50:16: error: cannot initialize a parameter of type 'RequestDeviceCallback' (aka 'void (*)(WGPURequestDeviceStatus, WGPUDeviceImpl *, const char *, void *)') with an rvalue of type 'wgpu::CallbackMode'
   50 |       nullptr, wgpu::CallbackMode::AllowSpontaneous,
      |                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/fbeaufort/github/emscripten/cache/sysroot/include/webgpu/webgpu_cpp.h:803:87: note: passing argument to parameter 'callback' here
  803 |         void RequestDevice(DeviceDescriptor const * descriptor, RequestDeviceCallback callback, void * userdata) const;
      |                                                                                       ^
2 errors generated.
make[2]: *** [CMakeFiles/app.dir/main.cpp.o] Error 1
make[1]: *** [CMakeFiles/app.dir/all] Error 2
make: *** [all] Error 2

Do you know what are the steps to fix this issue? Or are you already working on this by any chance?

beaufortfrancois / webgpu-cross-platform-app

Use C++ callbacks #8