How to create a constructor that can fail?

[kevyuu]

Basically, I want to have a way to add constructor that can fail and return an error code just like Stack api.

struct LuaTexture {
 gpu::TextureID texture_id;
 
 static auto FromPath(const Path& texture_path) -> TypeResult<LuaTexture> {
  // check whether path is valid.
 }
};

[kunitoki]

You can take a lua_State* as last argument and luaL_error or it. The result will be the same, but i assume you want to call this also from outside of lua scripts ?

[kevyuu]

Yeah, I think I will use this method. I have try this method, just wondering whether there is a more ergonomic way to do it.

[kevyuu]

Does lual_error call the destructor when exception is disabled? From what I understand longjmp will be undefined behaviour if the same code replaced with try catch will call destructor.

[kunitoki]

If you compiled lua as c++, a lua error will throw an exception that you can catch, and that will unwind the stack. I advise against using lua compiled as C when using c++ objects and RAII constructs