Function lua_insert

third-party/lua-5.2.4/src/lapi.c:193–203

LUA_API void lua_insert (lua_State *L, int idx) {
  StkId p;
  StkId q;
  lua_lock(L);
  p = index2addr(L, idx);
  api_checkstackindex(L, idx, p);
  for (q = L->top; q > p; q--)  /* use L->top as a temporary */
    setobjs2s(L, q, q - 1);
  setobjs2s(L, p, L->top);
  lua_unlock(L);
}


static void moveto (lua_State *L, TValue *fr, int idx) {