getting list<string> sort() to use my operator< ??

[gbgbgbgb]

Hi,

I have a definition
bool operator<(string s_s, string s_t)
{
....
}

and a variable
list<string> concomp;

but when i sort the list
concomp.sort();

it does NOT call the above operator, but rather uses predefined
lexical ordering.

I'm thinking the < might need to be defined differently?
(as g++ already has a < for strings and i need to override it somehow)

I'm using gcc3.2.2 on red hat/mandrake.

Thanks,
-Gill

 

[Ivan Vecerina]

I have a definition
bool operator<(string s_s, string s_t)
{
...
}

The standard library already defines this operator
(in the std namespace). You cannot override the
standard operator like this.

and a variable
list<string> concomp;

but when i sort the list
concomp.sort();

There is an overload of the 'sort' member function that
takes a function object to specify the ordering.

Here's an example, using a simple function instead of
a function object:

#include <string>
#include <list>

bool myOrdering( std::string const& a
, std::string const& b )
{
return a<b; // or some other op
}

void mySort(std::list<std::string>& v)
{
v.sort( &myOrdering );
}


hth, Ivan

 

[gbgbgbgb]

hth, Ivan

It did, indeed.
Thanks a lot, Ivan!