Re: Lua 5.3 Suggestion: extend lua_(get|set)uservalue() to associate userdata-to-userdata

[Sean Conner <sean@...>]

It was thus said that the Great Philipp Janda once stated:
> Am 02.12.2013 07:01 schröbte Sean Conner:
> >It was thus said that the Great Sir Pogsalot once stated:
> >>I am saying that it is out of my control, as it is done by code I did not
> >>write.  So the metatable check works but the subsequent rawlen() fails.
> >
> >   That's what I'm not understanding---the call to lua_rawlen().  To me, it
> >sounds like a defensive programmer going overboard.  Personally, I don't
> >believe in defensive programming as it hides bugs [1].  Trust the
> >programmer; do NOT trust the outside world though.
> 
> ... and don't trust that two programmers that have never even talked to 
> each other will always produce compatible code.
> 
> Consider two C extension modules written by different authors, which use 
> the same name for `luaL_newmetatable` but for different C types. No 
> trust in either programmer will prevent a crash when a user loads both 
> modules.

  And that brings us back to the whole namespace issue.  Odd how that keeps
coming up.

  -spc (And asking, has anyone encountered that issue?)