Sadly the test program fails to compile MSVC 7.1 as indicated below:
template<typename Ch, typename Tr = std::char_traits<Ch> >
struct basic_string_source
: private base_from_member< std::basic_string<Ch, Tr> >,
public iterator_source<
typename std::basic_string<Ch, Tr>::iterator,
Ch, Tr
>
{
typedef std::basic_string<Ch, Tr> string_type;
typedef typename string_type::iterator iterator;
typedef iterator_source<iterator, Ch, Tr> base_type;
typedef Ch char_type;
typedef Tr traits_type;
typedef source_tag io_category;
basic_string_source(const string_type& source)
: base_type(member.begin(), member.end())
<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
{ }
};
|
| I have posted a new version of my library, which has been rewritten to
| incorporate filtering as a basic construct.
| (http://groups.yahoo.com/group/boost/files/streambuf_lib.zip)
with member not found
Looks as though it should be source.begin() but that doesn't compile either:
J:\Cpp\streambuf_lib\boost\io\adapters.hpp(159) : error C2664:
'boost::io::iterator_source<InIt,Ch,Tr>::iterator_source(InIt,InIt)' : cannot
convert parameter 1 from 'std::basic_string<_Elem,_Traits,_Ax>::const_iterator'
to 'std::basic_string<_Elem,_Traits,_Ax>::iterator'
with
[
InIt=std::basic_string<char,std::char_traits<char>,std::allocator<char>>::iterat
or,
Ch=char,
Tr=std::char_traits<char>
]
and
[
_Elem=char,
_Traits=std::char_traits<char>,
_Ax=std::allocator<char>
]
and
[
_Elem=char,
_Traits=std::char_traits<char>,
_Ax=std::allocator<char>
]
No constructor could take the source type, or constructor overload
resolution was ambiguous
J:\Cpp\streambuf_lib\boost\io\adapters.hpp(158) : while compiling
class-template member function
'boost::io::basic_string_source<Ch>::basic_string_source(const
boost::io::basic_string_source<Ch>::string_type &)'
with
[
Ch=char
]
testStreambuf_lib.cpp(57) : see reference to class template
instantiation 'boost::io::basic_string_source<Ch>' being compiled
with
[
Ch=char
]
There are also zillions of warnings
j:\Cpp\streambuf_lib\boost\io\chains.hpp(267) : warning C4224: nonstandard
extension used : formal parameter 'chain' was previously defined as a type
j:\Cpp\streambuf_lib\boost\io\chains.hpp(271) : see reference to class
template instantiation 'boost::io::chain_client<Ch,Tr>' being compiled
MS 'Help' says:
nonstandard extension used : formal parameter 'identifier' was previously
defined as a type
The identifier was previously used as a typedef. This causes a warning under
ANSI compatibility (/Za).
Example
// C4224.cpp
// compile with: /Za /W1 /LD
typedef int I;
void func ( int I ); // C4224
Suggestions?
It would be nice if a working example of a filter was provided too - perhaps one
of the James Kanze examples like 'expand tabs to spaces'. Or is this an
exercise for the student?
Thanks
Paul
Paul A Bristow, Prizet Farmhouse, Kendal, Cumbria, LA8 8AB UK
+44 1539 561830 Mobile +44 7714 33 02 04
Mobile mailto:[EMAIL PROTECTED]
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