C++Talk.NET

Dilip · Guest

Vaclav

I have taken the liberty to cross-post this
microsoft.public.dotnet.languages.vc which has more visibility from
MSFT VC++ team.

thanks
--Dilip

Actual post by Vaclav Haisman originally posted at
comp.lang.c++.moderated follows:

==========================================================================

I have this test case that VC++.NET 2005 beta refuses to compile. I
think
that it is valid C++. If it is, is there a "bugzilla" for the compiler
where
I could report it?

VH

#include <string>
#include <iterator>

template <typename T>
struct default_index_policy
{
typedef T index_type;

template <typename U>
index_type
minus_left (index_type const & t, U const & u) const
{
return t - u;
}
};

/////////////////////////////////////////////////////////////////

typedef size_t _default_index_type;

template <typename Iterator, typename Index = _default_index_type,
typename IndexPolicy = default_index_policy
class indexing_iterator
{
public:
typedef Iterator iterator_type;
typedef Index index_type;
typedef IndexPolicy index_policy_type;

class IndexProxy
{
protected:
index_type const idx;
index_policy_type const idx_policy;

public:
IndexProxy (index_type const & i, index_policy_type const &
pol)
: idx (i), idx_policy (pol)
{ }

index_type index () const
{
return idx;
}

operator index_type () const
{
return idx;
}

// IndexProxy operators:
template <typename U>
friend IndexProxy
operator - (IndexProxy const & p, U const & u)
{
return IndexProxy (p.idx_policy.minus_left (p.index (),
u),
p.idx_policy);
}
};

typedef IndexProxy index_proxy_type;

protected:
iterator_type current;
index_type idx;
index_policy_type idx_policy;

public:
indexing_iterator ()
{ }

index_proxy_type
index () const
{
return IndexProxy (idx, idx_policy);
}
};

///////////////////////////////////////////////////////////////////////////////////

int main(int argc, char* argv[])
{
indexing_iterator<std::string::const_iterator, int,
default_index_policy it;
int index = it.index () - 1;

return 0;
}

Build log:
------ Build started: Project: test, Configuration: Debug Win32 ------
Compiling...
test.cpp
d:WilXVS.NETtesttesttest.cpp(57) : error C3861: 'IndexProxy':
identifier not found
d:WilXVS.NETtesttesttest.cpp(84) : see reference to
function
template instantiation
'indexing_iterator<Iterator,Index,IndexPolicy>::IndexProxy
operator -<int>(const
indexing_iterator<Iterator,Index,IndexPolicy>::IndexProxy &,const U
&)'
being compiled
with
[
Iterator=std::_String_const_iterator<char,std::char_traits,
Index=int,
IndexPolicy=default_index_policy<int>,
U=int
]
Build log was saved at
"file://d:WilXVS.NETtesttestDebugBuildLog.htm"
test - 1 error(s), 0 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped
==========

==========================================================================

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