Re: [boost] [graph] Remaining failures for Tru64/CXX

From: Boris Gubenko (Boris.Gubenko_at_[hidden])
Date: 2007-11-21 22:36:57

Markus Schoepflin wrote:
> the remaining two failures for Tru64/CXX (kolmogorov_max_flow_test and
> max_flow_test) should be marked as expected, as the STL implementation on
> this platform seems to suffer from a vector<bool>::iterator which doesn't
> satisfy all requirements:

Thanks for the investigation, Markus. This is a known problem in Rogue
Wave library: the vector<bool> iterators are not symmetric. We became
aware of it when a new test in Perennial 6.4 testing iterators
N + vector<bool> failed to compile. There is associated bug report in
the Rogue Wave bug tracking system.

A workaround which would work only for the one explicit specialization:
vector<bool, std::allocator<bool> > and not for any other allocator
could be adding the following to <vector> :

namespace std {
  vector<bool>::iterator operator+(
    vector<bool>::iterator::difference_type __n,
    const vector<bool>::iterator& __i)
  {
    return __i + __n;
  }
}

We may consider adding it. In the meantime, when marking the tests for
cxx, please add "acc*" toolset also (asterisk is for acc-pa_risc).

Thanks again,
  Boris

----- Original Message ----- 
From: "Markus Schöpflin" <markus.schoepflin_at_[hidden]>
To: <boost_at_[hidden]>
Sent: Wednesday, November 21, 2007 4:04 AM
Subject: [boost] [graph] Remaining failures for Tru64/CXX

> Hello,
>
> the remaining two failures for Tru64/CXX (kolmogorov_max_flow_test and
> max_flow_test) should be marked as expected, as the STL implementation on
> this platform seems to suffer from a vector<bool>::iterator which doesn't
> satisfy all requirements:
>
> cxx: Error: ../boost/concept_check.hpp, line 553: no operator "+" matches
>           these operands (nomatoprfun)
>             operand types are: std::iterator_traits<std::vector<bool,
>                       std::allocator<bool>>::iterator>::difference_type +
>                       std::vector<bool, std::allocator<bool>>::iterator
> ...
>           i = i + n; i = n + i; // require addition with difference type
> ---------------------------^
>
> If agreed, either me or the author can do the markup, whichever is preferred.
>
> Markus
>
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