BOOST Archives Google Group

[Boost-users] serilalization of union

2009-01-07T14:00:14Z

Hi all,
I am using the boost version 1.36.0 , linux platform.
In my project i have to srialize a Union . i tried in the same way that
classes and structures been serialized. But it gives a compilation error.
How can i do that.. Please help me doing this.
union myunion
{
uint32_t a;
float t;
i tried using like this.

[Boost-users] [datetime] local_date_time and time zone issues

2009-01-07T12:44:41Z

I've been playing with local_date_time and time zones but don't understand
the return values of utc_time(), local_time() and local_time_in(). Here's
a small program:
----------
int main()
{
boost::local_time::time_zone_p tr tz1(new
boost::local_time::posix_time_ zone("CET+1"));
boost::posix_time::ptime pt1(boost::gregorian::date(200 9, 1, 5),

[Boost-users] [date_time] error with g++-4.3.2

2009-01-07T12:37:18Z

Using 1.37.0 on x86_64-pc-linux.
I get the following error compiling a program that includes date_time.hpp with g++-4.3.2. The web site says that g++ 4.3.2 is tested for 1.37.0.
Any clue?
In file included from boost/date_time/local_time/tz_ database.hpp:14,
from boost/date_time/local_time/loc al_time.hpp:19,

[Boost-users] [BGL] Trouble linking read_graphviz

2009-01-07T06:09:08Z

Hi.
I have been working through the tutorial portion of "The Boost Graph
Library: User Guide and Reference Manual", and have been unable to
get example code that includes calls to read_graphviz to link. For
example, code including this line:
read_graphviz("figs/ospf-graph .dot", g_dot);
when compiled like this:

[Boost-users] Error during mipsel cross compile of asio example

2009-01-07T04:42:13Z

Hello,
I'm cross compiling an asio http server example from x86 linux to mipsel
linux using boost-1.37.0 and gcc 4.1.2.
I've compiled libraries successfully using bjam but the http server code
produces the following errors:
mipsel-ssd-linux-gnu-gcc -L/usr/cross/mipsel/mipsel-ssd -linux-gnu/lib
-L../boost-1.37.0/lib-mipsel connection.o connection_manager.o mime_types.o

Re: [Boost-users] [fusion] const and transform algorithm

2009-01-07T07:04:17Z

YOu can use a tie (tuple of references).
Why?
"Semantics of an expression is defined only where it differs from,
or is not defined in Random Access Sequence."
You should read more carefully ;-)
Hah. Wish I had more time :-P
Regards,

Re: [Boost-users] [fusion] const and transform algorithm

2009-01-07T06:29:51Z

----- Original Message -----
To: <boost-us...@lists.boost.org>
Sent: Wednesday, January 07, 2009 1:58 AM
I just wat to apply the unction get to a tuple of futures and reviver the stored values.
T& future<T>::get() is non const
Thanks for the reference. I was looking for a function prototype. BTW, the example is not in line with the functions.

Re: [Boost-users] [fusion] const and transform algorithm

2009-01-07T00:58:04Z

Yes.
if yes, would the following get a
I don't know. I'm not sure what you are looking for.
I am not sure what it is you want to do. Could you explain in english
instead of non-functioning code?
See the sequence/views concepts and the docs for the containers.
For example ([link]

Re: [Boost-users] [fusion] const and transform algorithm

2009-01-06T23:24:52Z

----- Original Message -----
To: <boost-us...@lists.boost.org>
Sent: Tuesday, January 06, 2009 11:26 PM
Can for_each mutate the sequence elements? if yes, would the following get a transformation I'm locking for?
vector<shared_pair<shared_futu re<int>,int>,shared_pair<share d_future<char>,int> > t;
boost::fusion::for_each(t, intrusive_get());

Re: [Boost-users] [fusion] const and transform algorithm

2009-01-06T22:26:52Z

Yes. Fusion transform returns a lazy (transform) view. This view
is non-mutating. It is not like STL's transform which mutates
the target container in place. Fusion's is purely functional and
lazily evaluated.
As I said, Fusion transform is purely functional. The result of a transform
is a view. The function will only be called when you iterate over the

Re: [Boost-users] Updating my local boost.

2009-01-06T21:37:21Z

Probably way too late to help the OP, sorry...
um, yeah.
I'm a little surprised that no one mentioned the official Subversion
recommendation for exactly this scenario:
[link]
That's how we track locally-modified third-party libraries.
______________________________ _________________

[Boost-users] [fusion] const and transform algorithm

2009-01-06T21:20:37Z

Hi,
What is the reason fusion::transform taskes a const Sequence?
template<
typename Sequence,
typename F
>
typename result_of::transform<Sequence const, F>::type transform(
Sequence const& seq, F f);
Does this means that the transform do not change the sequence itself o also its elements?

Re: [Boost-users] [bind][function] Newbie finds errors, but in Boost or between chair and keyboard?

2009-01-06T21:07:47Z

Just goes to show that I'm also a newbie in interpreting this kind of compiler
error messages. :) The code I posted was an attempt at a testcase for the actual
problem I had. Your answer pointed me in the right direction to solve this.
I'll keep it in mind.
Thanks for your quick and helpful reply.
Jeroen.

Re: [Boost-users] [BGL]Standard Breadth First Visitor

2009-01-06T20:37:09Z

OK, I'll try to explain a little bit better. I have a graph with a known
number of roots which I represent by the following adjacency list:
boost::adjacency_list<boost::s etS, boost::vecS, boost::bidirectionalS,
boost::no_property, boost::no_property, boost::no_property,
boost::listS>
The graph is generated in a way that I have a stable number of vertices

Re: [Boost-users] [BGL]Standard Breadth First Visitor

2009-01-06T14:26:53Z