Hi Joe, On Sat, May 07, 2005 at 08:18:42PM -0400, Joe Gottman wrote:
I was looking at the string algorithms library, and I saw it had a case-insensitive equals function, iequals, as well as a predicate class, is_iequal. It would be nice if there were a case-insensitive less-than function and predicate as well. This would facilitate case-insensitive sorting, and set or maps which are sorted case-insensitively.
Joe Gottman
I'm not sure if there is not a little bit of confusion here. is_iequal provides character-base comparison that can be used in algorithms like equals. Not vise-versa. So if I understand it correctly you would need class the will encapsulate equals/iequals algorithm. The same goes for less-then function you have proposed. Actualy, you can make comparison using std::lexicographical_compare function, just you will have to provide predicate class for maps and sets. It might be reasonable to include range-base variant of lexicographical_compare functions for convenience. But I think, that predicate classes should be placed elsewhere, maybe closer to map/set implementation. However, I might reconsider it laters. Regards, Pavol