[boost] MPL: clever way to remove *all* duplicates in a (non integral) sequence?

From: Brian Braatz (brianb_at_[hidden])
Date: 2005-06-16 22:03:11

i.e.

the example for mpl::unique shows:

typedef vector<int,float,float,char,int,int,int,double> types;
typedef vector<int,float,char,int,double> expected;
typedef unique< types, is_same<_1,_2> >::type result;

BOOST_MPL_ASSERT(( equal< result,expected > ));

note that type "expected" :
typedef vector<int,float,char,int,double> expected;

still has TWO ints in it.

I am looking for a way to basically do this:

typedef vector<int,float,float,char,int,int,int,double> types;
typedef vector<int,float,char, double> expected;
typedef unique_all< types, is_same<_1,_2> >::type result;

BOOST_MPL_ASSERT(( equal< result,expected > ));

(note the examples I am using use integral types, in my situation I am
not using integral types)

I dug through the archives and found a few mentions of people asking
this question and talking about it- but no substantial solution.

any help appreciated

Thanks

Brian
:)