Is there a way to handle exception from doString()? about slua

[pangweiwei]

All codes that access lua state should move to LoadLuaComplete callback, can not call member of luaState following init.

[pangweiwei]

code like this will work fine:

Lua.init(null,()=>{
Lua.luaState.doString("someUncaughtException()", "chunkName");
}
,false);

[paiboonpa]

@pangweiwei

Sorry for the wrong example. I think I should attached the whole project here:

http://levelup.in.th/TestLua.zip

It's not that the code is working before lua init is completed. Please extract the project and open the scene Main in your example. I modified Main.cs and main.txt to test this out. Now, foo function looked like this:

function foo(a,b,c)
print(h.j)
return a,b,c,"slua"
end

This will force an exception. Next, I edited errorReport() in LuaState.cs and comment out Debug.LogError(LuaDLL.lua_tostring(L, -1))

With this, there will be nothing left to report an error. I'm also not sure if I should hack the code to throw an exception instead of Debug.LogError or not because it may break the code.

If you asked me why I do not use Application.logMessageReceived to receive an error from Debug.LogError, it's because I want to handle the exception separate from other Debug.LogError in the application. For example, I want to show an error to user when lua do something wrong with different error message from other error. That's why I want try catch to be able to catch exception to work on my own error handling.

[pangweiwei]

I think you could modify doBuffer function like:

public bool doBuffer(byte[] bytes, string fn, out object ret)
{
ret = null;
int errfunc = LuaObject.pushTry(L);
if (LuaDLL.luaL_loadbuffer(L, bytes, bytes.Length, fn) == 0)
{
if (LuaDLL.lua_pcall(L, 0, LuaDLL.LUA_MULTRET, errfunc) != 0)
{
goto err;
}
LuaDLL.lua_remove(L, errfunc); // pop error function
ret = topObjects(errfunc - 1);
return true;
}
err:
string err = LuaDLL.lua_tostring(L, -1);
LuaDLL.lua_pop(L, 2);
throw new Exception(err);
}

[paiboonpa]

It threw an Exception now but it's empty string in
string err = LuaDLL.lua_tostring(L, -1);

However, I can use it with old Debug.LogError in errorReport(). Thank you very much!