October 2011 - Boost-users - lists.preview.boost.org

[Bind?] Returning generators instead of evaluating.
by Robert Jones 21 Oct '11

21 Oct '11

Hi All Does this functionality exist anywhere in Boost? If so can someone point me to it, and if not does it seem like a useful thing? Thx, - Rob. using boost::function; using boost::bind; template <typename T, typename T1> function<T( )> function<T( )> make_generator( function<T(T1)> f, T1 t1 ) { return bind( f, t1 ); } template <typename T, typename T1, typename T2> function<T( )> function<T( )> make_generator( function<T(T1, T2)> f, T1 t1, T2 t2 ) { return bind( f, t1, t2 ); } template <typename T, typename T1, typename T2, typename T3> function<T( )> function<T( )> make_generator( function<T(T1, T2, T3)> f, T1 t1, T2 t2, T3 t3 ) { return bind( f, t1, t2, t3 ); } // ...etc...

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Re: [Boost-users] Proposal mpl::switch_case
by Hite, Christopher 21 Oct '11

21 Oct '11

> Is this what you want? > http://dancinghacker.com/switch/ Yes! That is exactly what I want. I read some of the reviews. The input seems ok. I really don't care about return types. I wouldn't use a fall through, but I can see the point in doing it. Why did the project die? Does it just need a little bit of help? I'd be willing to offer a day or so. I was only testing gcc. Does this happen on other platforms as well? I would have hoped gcc would have detected a swtich/case. I posted on their list a while back. Chris

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[asio] virtual/emulated serial ports?
by Michael Powell 21 Oct '11

21 Oct '11

Hello, Does asio, or another boost API, allow developers to create a virtual or emulated serial port? By virtual or emulated, I mean, creating a software serial port that looks and feels just like the physical hardware, with device protocol to boot. Or something like a serial-tcp/ip bridge might be satisfactory as well. Oh, free, or not as expensive, is preferred, of course... :) Thank you... Best regards, Michael

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Re: [Boost-users] [asio] virtual/emulated serial ports
by Marat Abrarov 21 Oct '11

21 Oct '11

> Or something like a serial-tcp/ip bridge might be satisfactory as well. > Oh, free, or not as expensive, is preferred, of course... :) I use VSPE: http://www.eterlogic.com/Products.VSPE.html Regards, Marat Abrarov.

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MSM <-> UML Conversion
by asif saeed 21 Oct '11

21 Oct '11

Hi, I haven't yet looked at MSM. However, I do wonder if the activity/state diagrams generated from MSM based code would be convertible to equivalent sequence diagrams. In other words, I want to know if MSM does indeed create object instance and whether it creates those instances on heap, etc. In short, I am interested in the performance aspect. I have a scenario where I have two state machines - basically, protocols for the trading domain - and I am supposed to map one protocol to another and vice versa - that is, develop a message broker. I am thinking about designing a generic solution that could be used to map any protocol (all messages along with their behavior) to any protocol based on the grammar - the message strings, their sequences, etc. Can I use MSM for this kind of a problem? I did write something like this for a client a long time back but it would take me quite some time if I jump into doing that again. That does make think if Boost MSM (or StateChart?) offers a faster solution. Thanks in advance, -Asif

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[Boost-Interest][General] Will Boost C++ work for my device control software
by Boost lzw 20 Oct '11

20 Oct '11

Hi everyone, I am soon to start a project and am wondering if I can use Boost C++ for it. Basically, I am going to develop software to control a variety of devices. The "Big Picture" of it is this: the software will "talk" to each of these devices via their drivers from different "interfaces" - USB port, serial port, etc., and collecting measurement data from these devices and controlling them. My "Big Picture" questions are: is it possible for me to use Boost C++ for these tasks. If so, how? Any links to where I should look at in the Boost documentation would be welcomed. Are there any specific Boost library that I should study before starting the project. Thanks in advance. Best Robert

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serialization of STL containers with non-default allocator
by Jonathan Bishop 20 Oct '11

20 Oct '11

In my code I have used a non-default allocator MyAlloc for the STL classes. For instance, typedef std::basic_string< char, std::char_traits<char>, MyAlloc<char> > string ; Archive ar; ar & s; // compile error Is there a way to make this work. I know there is a builtin serialization for std::string which I would like to use. Thanks

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[Boost.Thread] thread started after constructor
by gast128 20 Oct '11

20 Oct '11

Hello all, I have a basic question about threads: can one assume that the thread is started after the constructor call (or when using create_thread in thread groups) or does one has to use an extra synchronization primitive (e.g. a barrier)? Example (real world is more complex): void g(int* x) { int x1 = *x; } void f() { int x = 0; boost::thread thd(&g, &x); //<-- thread is started or not? }

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[thread]N of args for thread::thread with args
by Marcello Puligheddu 20 Oct '11

20 Oct '11

In http://www.boost.org/doc/libs/1_47_0/doc/html/thread/thread_management.html Thread Constructor with arguments<http://www.boost.org/doc/libs/1_47_0/doc/html/thread/thread_management.html…> [...] Note: Currently up to nine additional arguments a1 to a9 can be specified in addition to the function f. But in Launching threads<http://www.boost.org/doc/libs/1_47_0/doc/html/thread/thread_management.html…>is clearly stated "There is an unspecified limit on the number of additional arguments that can be passed." -- marcello puligheddu Cagliari ,Sardegna, Italia +393203090251

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boost-python stringifying
by immanuel litzroth 20 Oct '11

20 Oct '11

Hello, I've got a object and I need to stringify it in boost-pyton bridge.... actually just the equivalent of calling str(obj) in python. I have a hard time finding out how to do this from the documentation. Thanks in advance for any pointers, Immanuel

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