Re: [boost] [RangeEx] Using istream_range?

Subject: Re: [boost] [RangeEx] Using istream_range?
From: Neil Groves (neil_at_[hidden])
Date: 2008-10-21 19:12:40

Hi Rob,

These issues are resolved in the latest uploaded version. I need to check
the ISO C++ specification to determine if the transform_fn_type should have
been visible. It certainly compiles on many other compilers.  Anyhow I think
this is going to work better, and indeed there were a few places I was using
'typename' where it was not necessary.

Thank you again for your feedback.

Neil Groves

On Tue, Oct 21, 2008 at 2:21 PM, Robert Jones <robertgbjones_at_[hidden]>wrote:

> On Tue, Oct 21, 2008 at 1:44 PM, Neil Groves <neil_at_[hidden]
> >wrote:
>
> > Hi Rob,
> >
> > I have uploaded what I believe to be a corrected version of
> istream_range.
> > I
> > have to confess that I have not yet been able to check this on a GCC
> > compiler, but I think I simply had two template parameter types switched.
> > My
> > test case was using 'char' for both 'Type' and 'Elem' hence I did not
> > detect
> > the issue.
> >
> > I am installing Xcode as we speak on a Mac so I will in due course find
> out
> > if this works on GCC. Since the change did not make things any worse I
> have
> > posted it anyhow.
> >
> >
> Hi Neil
>
> Thanks for that - that now works for me!
>
> However, (sorry!), the next step, using adaptors, fails when I only include
> the
> adaptors header file. Source and error attached.
>
> #include <iostream>
> #include <iterator>
> #include "boost/range.hpp"
> #include "boost/range/istream_range.hpp"
> #include "boost/range/algorithm.hpp"
> #include "boost/range/adaptors.hpp"
>
> void f( int );
>
> int main( )
> {
>  boost :: for_each(
>      boost :: istream_range< int >( std :: cin ),
>      f );
>  return 0;
> }
>
> $ g++ -I.. -c junk.cpp
> In file included from ../boost/range/adaptors.hpp:24,
>                 from junk.cpp:6:
> ../boost/range/adaptor/map.hpp:69: error: `transform_fn_type' was not
> declared in this scope
> ../boost/range/adaptor/map.hpp:69: error: `source_range_type' was not
> declared in this scope
> ../boost/range/adaptor/map.hpp:69: error: template argument 1 is invalid
> ../boost/range/adaptor/map.hpp:69: error: template argument 2 is invalid
> ../boost/range/adaptor/map.hpp:69: error: expected nested-name-specifier
> ../boost/range/adaptor/map.hpp:71: error: expected `)' before "fn"
> ../boost/range/adaptor/map.hpp:76: error: expected `,' or `...' before '&'
> token
> ../boost/range/adaptor/map.hpp:76: error: ISO C++ forbids declaration of
> `base' with no type
> ../boost/range/adaptor/map.hpp: In constructor
> `boost::range_detail::select_first_range<StdPairRng>::select_first_range(
> int)':
> ../boost/range/adaptor/map.hpp:76: error: class
> `boost::range_detail::select_first_range<StdPairRng>' does not have any
> field named `base'
> ../boost/range/adaptor/map.hpp:76: error: `other' undeclared (first use
> this
> function)
> ../boost/range/adaptor/map.hpp:76: error: (Each undeclared identifier is
> reported only once for each function it appears
>  in.)
> ../boost/range/adaptor/map.hpp: At global scope:
> ../boost/range/adaptor/map.hpp:85: error: `transform_fn_type' was not
> declared in this scope
> ../boost/range/adaptor/map.hpp:85: error: `source_range_type' was not
> declared in this scope
> ../boost/range/adaptor/map.hpp:85: error: template argument 1 is invalid
> ../boost/range/adaptor/map.hpp:85: error: template argument 2 is invalid
> ../boost/range/adaptor/map.hpp:85: error: expected nested-name-specifier
> ../boost/range/adaptor/map.hpp:87: error: expected `)' before "fn"
> ../boost/range/adaptor/map.hpp:92: error: expected `,' or `...' before '&'
> token
> ../boost/range/adaptor/map.hpp:92: error: ISO C++ forbids declaration of
> `base' with no type
> ../boost/range/adaptor/map.hpp: In constructor
> `boost::range_detail::select_second_mutable_range<StdPairRng>::select_sec
> ond_mutable_range(int)':
> ../boost/range/adaptor/map.hpp:92: error: class
> `boost::range_detail::select_second_mutable_range<StdPairRng>' does not
> have any field named `base'
> ../boost/range/adaptor/map.hpp:92: error: `other' undeclared (first use
> this
> function)
> ../boost/range/adaptor/map.hpp: At global scope:
> ../boost/range/adaptor/map.hpp:101: error: `transform_fn_type' was not
> declared in this scope
> ../boost/range/adaptor/map.hpp:101: error: `source_range_type' was not
> declared in this scope
> ../boost/range/adaptor/map.hpp:101: error: template argument 1 is invalid
> ../boost/range/adaptor/map.hpp:101: error: template argument 2 is invalid
> ../boost/range/adaptor/map.hpp:101: error: expected nested-name-specifier
> ../boost/range/adaptor/map.hpp:103: error: expected `)' before "fn"
> ../boost/range/adaptor/map.hpp:108: error: expected `,' or `...' before '&'
> token
> ../boost/range/adaptor/map.hpp:108: error: ISO C++ forbids declaration of
> `base' with no type
> ../boost/range/adaptor/map.hpp: In constructor
> `boost::range_detail::select_second_const_range<StdPairRng>::select_secon
> d_const_range(int)':
> ../boost/range/adaptor/map.hpp:108: error: class
> `boost::range_detail::select_second_const_range<StdPairRng>' does not h
> ave any field named `base'
> ../boost/range/adaptor/map.hpp:108: error: `other' undeclared (first use
> this function)
> In file included from ../boost/range/adaptors.hpp:31,
>                 from junk.cpp:6:
> ../boost/range/adaptor/uniqued.hpp: At global scope:
> ../boost/range/adaptor/uniqued.hpp:37: error: expected
> nested-name-specifier
> ../boost/range/adaptor/uniqued.hpp:37: error:
> `adjacent_filter_range<boost::range_detail::unique_not_equal_to,ForwardRng
> >' specified as declarator-id
> ../boost/range/adaptor/uniqued.hpp:37: error: two or more data types in
> declaration of `adjacent_filter_range<boost::ran
> ge_detail::unique_not_equal_to,ForwardRng>'
> ../boost/range/adaptor/uniqued.hpp:37: error: expected `;' before "base"
> ../boost/range/adaptor/uniqued.hpp: In constructor
> `boost::range_detail::unique_range<ForwardRng>::unique_range(ForwardR
> ng&)':
> ../boost/range/adaptor/uniqued.hpp:40: error: class
> `boost::range_detail::unique_range<ForwardRng>' does not have any fi
> eld named `base'
>
> Regards, Rob.
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