>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> >
> > >From: "Jason House" <[EMAIL PROTECTED]>
> >
> > > 1. Is it at all useful/possible to use a lambda-like notation?
> >
> Thinking about it more, I don't know how doable it is for the first 3
> parameters...
>
> But what about:
Terje Slettebø wrote:
>
> >From: "Jason House" <[EMAIL PROTECTED]>
>
> > I had 2 thoughts today...
> >
> > 1. Is it at all useful/possible to use a lambda-like notation?
>
> In what way? Could you have given a rough syntax-example?
>
> An example in BLL is:
>
> std::for_each(v.begin(), v.end
>From: "Jason House" <[EMAIL PROTECTED]>
> I had 2 thoughts today...
>
> 1. Is it at all useful/possible to use a lambda-like notation?
In what way? Could you have given a rough syntax-example?
An example in BLL is:
std::for_each(v.begin(), v.end(), std::cout << _1 << '\n');
>In the past,
I had 2 thoughts today...
1. Is it at all useful/possible to use a lambda-like notation?
In the past, I've liked the look of that a lot.
(the comments about alternate notation made me think of it)
2. Why are we restricting the output to strings?
Couldn't the types of the 3 delimiter stri
> > I am afraid boost/io/format will be confusing in a sight of
> presence of
> > Boost.Format.
>
> I understand. Well, it's in a different namespace.
I do not know why BTW. But even if it stays this way, I easily see a newbie
looking for Boost.Format staff in your headers and vise-vesa
> The
>From: "Rozental, Gennadiy" <[EMAIL PROTECTED]>
> > #include
> > #include
> > #include
>
> I am afraid boost/io/format will be confusing in a sight of presence of
> Boost.Format.
I understand. Well, it's in a different namespace.
> I would prefer (since it all about container output formattin
> #include
> #include
> #include
I am afraid boost/io/format will be confusing in a sight of presence of
Boost.Format.
I would prefer (since it all about container output formatting)
boost/io/container
Also it could be stl instead of std, though it's the matter of taste.
> std::cout << forma
Hi.
I've now uploaded the latest version of the composite stream operators
library at Yahoo Files
(http://groups.yahoo.com/group/boost/files/composite_stream_operators/) and
the Sandbox (boost/io/format/ and libs/io/format)..
Since the libraries in the Sandbox use the boost namespace, this one do
>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> > typedef std::vector vector_char;
> >
> > vector_char values;
> >
> > // Fill with 'A', 'B', 'C'
> >
> > std::cout << io::format("[", "]", ", ", "\'", "\'") <<
values;
> >
> > Output:
> >
> > ['A', 'B', 'C']
> >
> > However, is th
Terje Slettebø wrote:
> typedef std::vector vector_char;
>
> vector_char values;
>
> // Fill with 'A', 'B', 'C'
>
> std::cout << io::format("[", "]", ", ", "\'", "\'") << values;
>
> Output:
>
> ['A', 'B', 'C']
>
> However, is this overkill?
It seems that way, especially considering that
>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> >
> > std::vector > test;
> >
> > std::cout << test: // Using defaults
> >
> > (('A',1),('B',2),('C',3))
>
> I would suspect that chars don't get output with '' around them...
> Is there even a way to specify/change that? Somethin
>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> >
> > >From: "Jason House" <[EMAIL PROTECTED]>
> >
> > > Is there even a way to specify/change that?
> >
> > It isn't currently, as the fundamental types aren't handled as composite
> > types, and therefore aren't formatted using
>From: "Vladimir Prus" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
>
> > Right. There was a suggestion for allowing generic formats, though,
using
> > the same format for all instantiations of a template. The question is
how
> > to do it. The current version stores the format for each specific typ
Terje Slettebø wrote:
>
> >From: "Jason House" <[EMAIL PROTECTED]>
> > I would suspect that chars don't get output with '' around them...
>
> Right. I was just thinking C++ code, here. :)
>
> > Is there even a way to specify/change that?
>
> It isn't currently, as the fundamental types aren't
Terje Slettebø wrote:
> Right. There was a suggestion for allowing generic formats, though, using
> the same format for all instantiations of a template. The question is how
> to do it. The current version stores the format for each specific type, as
> you say. Volodya suggested a couple of ways i
Hi Terje,
[...]
> > But you don't write library, put a seal on it, and stop. There's nothing
>
> wrong
>
> > with making it more flexible when users demand it. As it stands, only few
> > persons are interested in the simplest facilities. Is it worth spending
> > time
> > on completely generic/fl
>From: "Jason House" <[EMAIL PROTECTED]>
> >
> > std::vector > test;
> >
> > std::cout << test: // Using defaults
> >
> > (('A',1),('B',2),('C',3))
>
> I would suspect that chars don't get output with '' around them...
Right. I was just thinking C++ code, here. :)
> Is there even a way to specify
Terje Slettebø wrote:
>
> >From: "Jason House" <[EMAIL PROTECTED]>
>
> > Terje Slettebø wrote:
> > > In a way, something good came from it, as well: I've recently looked at
> > > Boost.Tuple, and I see that they have I/O operators defined (in
> > > tuple_io.hpp).
> >
> > Well, it definitely see
>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> >
> > >From: "Vladimir Prus" <[EMAIL PROTECTED]>
> >
> > Sorry for having taken so long to respond to these messages. I felt a
need
> > for a break, to consider how it might be done.
>
> I was wondering about this line of discussio
Terje Slettebø wrote:
>
> >From: "Vladimir Prus" <[EMAIL PROTECTED]>
>
> Sorry for having taken so long to respond to these messages. I felt a need
> for a break, to consider how it might be done.
I was wondering about this line of discussion earlier today... wondering
if it died on the vine o
>From: "Vladimir Prus" <[EMAIL PROTECTED]>
Sorry for having taken so long to respond to these messages. I felt a need
for a break, to consider how it might be done.
In a way, something good came from it, as well: I've recently looked at
Boost.Tuple, and I see that they have I/O operators defined
39 561830 Mobile +44 7714 33 02 04
Mobile mailto:[EMAIL PROTECTED]
mailto:[EMAIL PROTECTED]
> -Original Message-
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of Terje Slettebø
> Sent: Friday, February 07, 2003 9:38 PM
> To: Boost mailing list
> Sub
Vladimir Prus wrote:
> >>I'm pulling at stings, but there has to be good stuff to add if we come up
> >
> > with
> >
> >>the right aspect to develop. I have never heard of a library designed for
> >>evaluation of debug-time expressions... It would be interesting to see
> >
> > how
> >
> >>powe
Terje Slettebø wrote:
From: "Jason House" <[EMAIL PROTECTED]>
Terje Slettebø wrote:
Regarding this project. I've got doubts about the viability of it.
Well, I'm glad you've given it a greater level of thought. I really like
the idea
of the composite_format, and probably should try to
>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
>
> > Regarding this project. I've got doubts about the viability of it.
>
> Well, I'm glad you've given it a greater level of thought. I really like
the idea
> of the composite_format, and probably should try to do the same :)
Tha
Terje Slettebø wrote:
> Regarding this project. I've got doubts about the viability of it.
Well, I'm glad you've given it a greater level of thought. I really like the idea
of the composite_format, and probably should try to do the same :)
> One thing is to create something useful. Another t
Regarding this project. I've got doubts about the viability of it.
One thing is to create something useful. Another thing is to create
something useful as a _library_ component. As has been noted regarding
application and library development, application development and library
development is typi
>From: "Jason House" <[EMAIL PROTECTED]>
> Jason House wrote:
>
> > Terje Slettebø wrote:
> >
> > > Another possibility might be to have a sentry object, doing automatic
state
> > > saving and restoring in the constructor and destructor. In fact, there
are
> > > already such classes in Boost: Dary
>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
>
> > >From: "Jason House" <[EMAIL PROTECTED]>
> > > I thought of one thing that might work reasonably well.
> > >
> > > How about making ++io_format< T > save the current format in a stack.
> > > and having io_format< T>-- restore t
Jason House wrote:
> Terje Slettebø wrote:
>
> > Another possibility might be to have a sentry object, doing automatic state
> > saving and restoring in the constructor and destructor. In fact, there are
> > already such classes in Boost: Daryle Walker's I/O state savers, which fits
> > this sit
Terje Slettebø wrote:
> >From: "Jason House" <[EMAIL PROTECTED]>
> > I thought of one thing that might work reasonably well.
> >
> > How about making ++io_format< T > save the current format in a stack.
> > and having io_format< T>-- restore the previously queuued format
>
> I've thought of the
>From: "Larry Evans" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> >>From: "Vladimir Prus" <[EMAIL PROTECTED]>
> >
> >>Terje Slettebø wrote:
>
> [snip]
> >
> > std::cout << io_format("\n|","|\n","|")
> > << io_format("---","---","---")
> > << board << '\n';
> > }
>
>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
>
> > > It should handle maps and pairs
> > > reasonably well. I think that I have the same complaints about this
as
> > > io_manip
> > >
> > > The saving of information to the stream means that you can affect all
> > > future outpu
Terje Slettebø wrote:
> > It should handle maps and pairs
> > reasonably well. I think that I have the same complaints about this as
> > io_manip
> >
> > The saving of information to the stream means that you can affect all
> > future output...
> >
> > For instance, if you have a type
> > map >
>From: "Terje Slettebø" <[EMAIL PROTECTED]>
> const int array[3];
>
> std::cout << array;
>
> MSVC 7 - C
> Intel C++ 7 - C
> g++ 3.2 - C
>
> const char array[3];
>
> std::cout << array;
>
> MSVC 7- A (S or C)
> Intel C++ 7 - C
> g++ 3.2 - C
>
> std::cout << "Test";
>
> MSVC 7 -
>From: "Paul A. Bristow" <[EMAIL PROTECTED]>
> This looks really neat - and potentially very useful.
Thanks. :)
> Sadly, array is one of the most interesting cases - so I'm sure I won't be
the
> only one 'watching this space'.
I've looked more into it, and it seems this is a problem not just fo
Terje Slettebø wrote:
By the way, just for fun. Adding the following output operator for
arrays,
to the header I gave in the previous posting:
---
|O|X|O|
---
|X|X|O|
---
|O|O|X|
---
"Shall we play a game?" :)
Sure thing :-)
I guess you maybe got the "War Games" refer
This looks really neat - and potentially very useful.
Sadly, array is one of the most interesting cases - so I'm sure I won't be the
only one 'watching this space'.
Thanks
Paul
PS composite_format is a bit long, but I can't suggest better.
Paul A Bristow, Prizet Farmhouse, Kendal, Cumbria, LA
>From: "Jason House" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> > and given this:
> >
> > int main()
> > {
> > char board[3][3]=
> > {
> > {'O','X','O'},
> > {'X','X','O'},
> > {'O','O','X'}
> > };
> >
> > std::cout << io_format("\n|","|\n","|")
> > << io_format("---","---","-
>From: "Paul A. Bristow" <[EMAIL PROTECTED]>
> This looks most useful - potentionally :-(
>
> Alas the two files, test and composite_stream_operators.hpp
>
> http://groups.yahoo.com/group/boost/files/composite_stream_operators/).
>
> won't compile on MSVC 7.0.
>
> test_composite_format.cpp
> test_
Terje Slettebø wrote:
From: "Vladimir Prus" <[EMAIL PROTECTED]>
Terje Slettebø wrote:
[snip]
std::cout << io_format("\n|","|\n","|")
<< io_format("---","---","---")
<< board << '\n';
}
we get:
---
|O|X|O|
---
|X|X|O|
---
|O|O|X|
---
I've
Terje Slettebø wrote:
> and given this:
>
> int main()
> {
> char board[3][3]=
> {
> {'O','X','O'},
> {'X','X','O'},
> {'O','O','X'}
> };
>
> std::cout << io_format("\n|","|\n","|")
> << io_format("---","---","---")
> << board << '\n';
> }
>
> we get:
>
> -
eptable conversion)
with
[
T=std::vector>
]
test_composite_format.cpp(37) : error C2679: binary '<<' : no operator found
which takes a right-hand operand of type 'composite_format' (or there is no
acceptable conversion)
with
>From: "Vladimir Prus" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
>
> > There are also some other issues: The current version assumes
basic_string
> > for the delimiters. I've found it hard to let it take an arbitrary
string
> > type, as the format-object (which the manipulator,
basic_composite_f
Beman Dawes wrote:
At 03:22 AM 2/4/2003, Vladimir Prus wrote:
>Terje Slettebø wrote:
>...
Have you looked at Jen Maurer's persistence library? It was an elegant
design and quite good at handling the issues you are discussing, IIRC.
It is still in CVS under the branch "persistence-initial".
B
Terje Slettebø wrote:
I've some concerns, though:
1. Are "default" breaces/separators possible? I'd rather not use
io_format every time I had to output a vector.
Good point. As it is now, it just defaults to empty strings for the
separators. Any idea how to specify such a default? If it's
>From: "Vladimir Prus" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
>
> > Incidentally, I've just made a version that does exactly this. :) I've
> > attached it, including a test, with this posting.
>
> I've take a look and I like it -- quite lean and does the work.
Thanks. :)
> I've some concern
Terje Slettebø wrote:
This example should one case where manipulators are desirable:
vector< vector > v;
cout << v ;
Here, each nested vector better go on a separate line. I suggest:
cout << multiline << v;
where "multiline" manipulator causes each element of the next output
con
>From: "Vladimir Prus" <[EMAIL PROTECTED]>
> Terje Slettebø wrote:
> >>From: "Vladimir Prus" <[EMAIL PROTECTED]>
> >
> >>after having to output std::vector to stream again and again using
custom
> >>solution, I started to wonder why we don't have a solution in boost.
> >>Does it makes sense to inc
Al Stevens who writes the C++ column for "Doctor Dobbs Journal" put out a
persistent template library for C++ containers some time back. It is
probably on the DDJ web site, although I haven't looked there recently. You
might want to check that out and see what he did. I will readily admit I
have no
Terje Slettebø wrote:
From: "Vladimir Prus" <[EMAIL PROTECTED]>
after having to output std::vector to stream again and again using custom
solution, I started to wonder why we don't have a solution in boost.
Does it makes sense to include operators<< for vectors, sets, etc?
I was thinking abou
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