-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Monday 17 August 2009, Thomas Klimpel wrote:
Type & operator=(BOOST_RV_REV(Type) t) { Type tmp(boost::move(t)); this->swap(tmp); }
I hope I can omit the temporary, because two calls to swap are less efficient than a single call to swap. I can't find any second thought that forces me to create a temporary. Do I miss something?
I don't think you need to. The temporary is useful if you want to always give moved-from objects a specific state (presumably the move constructor does this). But the standard is looser, it only requires the moved-from object doesn't violate any of the class invariants. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEARECAAYFAkqJurkACgkQ5vihyNWuA4UPdwCcDx1z5q4kVkqgF6wcUNMQItqa N+AAn28ftrbGEi8hohQRJGSl+WdIYx7M =swov -----END PGP SIGNATURE-----