Subject: Re: [Boost-users] ptr_vector sort usage
From: Thorsten Ottosen (thorsten.ottosen_at_[hidden])
Date: 2010-08-05 12:13:18
archie14 skrev:
> Roman Perepelitsa <roman.perepelitsa <at> gmail.com> writes:
>
>> class Compare
> {
>> public:
>> Compare (int i) : _i(i){}
>> //this does not compile, but what's the proper way to define
>> // function object for the sort method in ptr_vector?
>> bool operator<(const A& v1, const A& v2)
>> {
>> return (v1.i > v2.i) &&(_i != 1);
>> }
> ...
> };
>> Try making your operator const:
>> bool operator<(const A& v1, const A& v2) const
>>
>> Roman Perepelitsa.
>
> No, it did not work. Complains that
>
> binary 'operator <' has too many parameters
Indeed, when defining the comparison operator as a member you need to
supply only one argument.
HTH
-Thorsten