Function iscleared

extlibs/lua/src/lgc.c:173–180

** tells whether a key or value can be cleared from a weak ** table. Non-collectable objects are never removed from weak ** tables. Strings behave as 'values', so are never removed too. for ** other objects: if really collected, cannot keep them; for objects ** being finalized, keep them in keys, but not in values */

** being finalized, keep them in keys, but not in values
*/
static int iscleared (global_State *g, const GCObject *o) {
  if (o == NULL) return 0;  /* non-collectable value */
  else if (novariant(o->tt) == LUA_TSTRING) {
    markobject(g, o);  /* strings are 'values', so are never weak */
    return 0;
  }
  else return iswhite(o);
}


/*