-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 It does so by comparing twice: if a is not smaller b and b is not smaller a, then obviously they have to be equal with respect to this comparison function. Andreas Aseem Rastogi wrote: > Hi, > > I am a bit confused about STL sets. STL set takes a comparator function > as input which returns true if first argument is less than second > argument, false otherwise. How does this detect equal elements ? > > For eg. set<int> will not allow one int to be inserted twice. How does > it check for equality when comparator function doesn't provide that info ? > > I tries to go through set code in stl_set.h but couldn;t get anything. > > Thanks in advance. > > Regards, > Aseem. > -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2.2 (GNU/Linux) Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org iD8DBQFEbSGKmz2azRoltLYRAl/oAJ4+Dv12Liy+5N2eukHBH1IjUOKywACfUiMB 3ZV7Ckeb3Oryy2Ge+sxxIA0= =dZQo -----END PGP SIGNATURE-----
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