Function lua_copy

third-party/lua-5.2.4/src/lapi.c:226–232

LUA_API void lua_copy (lua_State *L, int fromidx, int toidx) {
  TValue *fr;
  lua_lock(L);
  fr = index2addr(L, fromidx);
  moveto(L, fr, toidx);
  lua_unlock(L);
}


LUA_API void lua_pushvalue (lua_State *L, int idx) {