Efficient way to delete values from registry

[Michael Roth <mroth@...>]

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Hello,

somewhere in my wrapper I have to clear some values from the registry.
When I have to clear the values, I don't know if the values were stored
in the registry or not.

So my questions are:

a.) Which one will fragment the registry lesser?
b.) Is version_B worth the effort?
c.) Or is version_A just enough because lua_rawset behaves intelligently?


~    void version_A(lua_State * L, void * key)
~    {
~      lua_pushlightuserdata(L, key);
~      lua_pushnil(L);
~      lua_rawset(L, LUA_REGISTRYINDEX);
~    }


~    void version_B(lua_State * L, void * key)
~    {
~      lua_pushlightuserdata(L, key);
~      lua_rawget(L, LUA_REGISTRYINDEX);
~      if (!lua_isnil(L, -1))
~      {
~        lua_pushlightuserdata(L, key);
~        lua_pushnil(L);
~        lua_rawset(L, LUA_REGISTRYINDEX);
~      }
~      lua_pop(L, 1);
~    }


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