Re: A few Wild and Wooly Proposals, while we're here (was Re: Feature request: userdata slice)

[Philipp Janda <siffiejoe@...>]

Am 21.08.2015 um 04:18 schröbte Sean Conner:

> 1) Allow unique metatables for lightuserdata, that also respect __gc.

lightuserdata is a value type. `__gc` doesn't work well with value types ...

    lua_pushlightuserdata( L, 0x1234 );
    luaL_getmetatable( L, "metatablewithgc" );
    lua_setmetatable( L, -2 );
    lua_pushvalue( L, -1 ); /* duplicate lightuserdata */
    lua_pop( L, 2 );
    /* should the __gc method really run twice now? */

>    -spc (I can't let Soni have all the fun here ... [5])

Philipp