[Boost-users] Re: MPL - creating new sequence from another sequence using predicate

"Bruce Trask" writes:

1. ( ) text/plain (*) text/html

Hi,

I have a mpl::vector of types. Each of the types in the vector have themselves another nested mpl::vector that is a sequence of enums. I have include the code below.

What I am trying to do is take the original sequence and make a new sequence based on the predicate that only elements with certains enums in their nested vector be included in the new sequence. I have included more notes in the embedded comments.

I was thinking of using mpl::copy_if but am having trouble getting the predicate right.

Wanted to know if anyone could steer me in the right direction. I am trying to fill in the ??? below. I am having trouble writing a custom predicate.

Thanks in advance.

Regards,

Bruce

#include <string>

#include <iostream>

#include

Hints: #1 don't use tabs in your code samples; they get stripped by most mailers #2 fix your newlines #3 post your code as an attachment and it will always come through correctly. How does what I've done below look to you? -- Dave Abrahams Boost Consulting www.boost-consulting.com