Tuples: draft 1

[Chris Jefferson]

>Usually, negative tests are suffixed with _neg. See:
>
>http://gcc.gnu.org/onlinedocs/libstdc++/test.html
>
>There are several examples of how libstdc++ does negative testing in the
>existing testsuite.
>  
>
Thanks.

I've looked at these tests, but it seems that they always list exactly 
the errors which are produced. As I expect the definition of the tuple 
header to change, and because I don't think the exact errors are 
important, is there an easy way to do a { dg-do compile } , and then 
simply say "this will fail", rather than having to give an exact list of 
errors?

Chris