January 2009 - Boost-users - lists.preview.boost.org

Re: [Boost-users] [Proto] automaitcally convert class to proto literal
by Daniel Oberhoff 05 Jan '09

05 Jan '09

Joel Falcou wrote: > Daniel Oberhoff a écrit : > > Hi, > > > > I am stilly trying o get my array computation DSEL up and running. > > The basic grammar is in place, what I am fighting with is protfying my > > literals. I.e. I have an array class, and I want the following > > expression: > > > > A(_i,_j) > > > > to become a function(literal<Array>(A), index_placeholder<0>, > > index_placeholder<1>) > Why A should be a litteral and not terminal ? I might have gotten the terms wrong. But the way I got it working now is with using proto::lit which turns things into literals. I tried subclassing terminal with my array class, but that way the tree did not keep a reference to the array, and thus could not be evaluated as such. Subclassing literal did not work because I did not find a way to actually have the literal take a reference to the array itself. I could of course use a placeholder syntax, and pass in the actual arrays at evaluation time but I want expressions to work "in-place", i.e. I want to be able to write A(_i,_j) = B(_i) * C(_j); and that to just be evaluated as it stands there. Enabling placeholders could be a useful feature, but that would be relatively easy to add. -- --- Daniel Oberhoff Fraunhofer FIT Schloss Birlinghoven 53754 Sankt Augustin, Germany Tel.: +49-(0)-2241-14-3486 Fax.:+49 (0) 2241/14-2080

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Bus error side effect from boost::logging
by Allen Cronce 05 Jan '09

05 Jan '09

I'm tracking down an intermittent bus error under Mac OS X 10.5.6 that happens when formatting a double as a string. The crash can happen when outputting to a stream, when calling printf, or when using boost::format. Of course the crash only happens in our release build, which always makes things more fun ;-) Here's a sample routine that can trigger the bus error in our unit test: --snip-- int TestDoubleFormatBusError(void) { std::cout << "\nTesting double format problem..." << std::endl; uint64_t testMicroseconds = 100000; double delta = 179; double percentOff; percentOff = (delta / testMicroseconds) * 100; std::cout << percentOff; // <-- This is where the crash sometimes happens. return 0; } --snip-- I'm pretty sure that there's nothing wrong with the above code, but I'm open to suggestions. After binary chopping, I determined that the crash only happens after invoking John Torjo's experimental boost::logging. If I disable logging, the problem goes away. Has anyone seen this problem? John, do you have any suggestions for understanding and resolving the crash? Thanks in advance. Best, -- Allen Cronce

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Re: [Boost-users] Compile error OSX Callback problem for
by Bill McLean 04 Jan '09

04 Jan '09

Marshall, Thanks for the reply. You have touched upon an issue that I'm not sure how to solve. The general problem is how to use boost::function and boost::bind to register a member callback function for a c style library. A proxy function that has signature of the c callback function and the correct instance of the class containing the member function to call. Any thoughts or approaches to solve it. Bill

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Re: [Boost-users] Boost.Lambda: failure to compile with std::set, OK withstd::vector, bug?
by Anders Dalvander 04 Jan '09

04 Jan '09

> Hi, > > Compiling the code below with std::vector goes OK, the std::set variant does not compile: > > All elements in a std::set are const, so you need to make the print member function const: struct Integer { Integer(int anInt) : integer(anInt){} bool operator<( const Integer& anInteger) const { return integer < anInteger.integer;} void print() const {std::cout << integer << std::endl;} int integer; }; Regards, Anders Dalvander

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[Proto] automaitcally convert class to proto literal
by Daniel Oberhoff 04 Jan '09

04 Jan '09

Hi, I am stilly trying o get my array computation DSEL up and running. The basic grammar is in place, what I am fighting with is protfying my literals. I.e. I have an array class, and I want the following expression: A(_i,_j) to become a function(literal<Array>(A), index_placeholder<0>, index_placeholder<1>) (simplified for readability, but the point should be clear). it works like this: proto::lit(A)(_i,_j) so how can I automate the turning of my array instance into a literal? I have access to the class definition and I tried subclassing terminal and literal and the PROTO_EXTENDS macro. The former two had no effect on my problem, and the latter didn't compile ( I tried various combindations of Expr and Derived parameters). Any ideas? Daniel

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packaging boost-1.37.0 for "LTIB"?
by Robert P. J. Day 04 Jan '09

04 Jan '09

i want to package the latest version of boost for the LTIB software package so, to make a long story short, here's the RPM packaging spec file for an older version: =========================== cut here ============================ %define pfx /opt/freescale/rootfs/%{_target_cpu} %define __unzip unzip -a Summary : c++ libraries Name : boost Version : 1.31.0 Release : 1 Vendor : Freescale Packager : Stuart Hughes Group : System Environment/Libraries Source : %{name}_1_31_0.tar.bz2 Patch0 : boost-1.31.0-regex-patch-20040503.zip License : Boost (distributable) BuildRoot : %{_tmppath}/%{name} %Description %{summary} %Prep %setup -n %{name}_1_31_0 cd $RPM_BUILD_DIR/%{name}_1_31_0/boost/regex/v4 %{__unzip} -o $RPM_SOURCE_DIR/boost-1.31.0-regex-patch-20040503.zip %Build %Install rm -rf $RPM_BUILD_ROOT mkdir -p $RPM_BUILD_ROOT/%{pfx}/%{_prefix} (cd tools/build/jam_src && ./build.sh) BJAM=`find tools/build/jam_src/ -name bjam -a -type f` PYTHON_VERSION=`python -V 2>&1 |sed 's,.* $[0-9]\.[0-9]$$\.[0-9]$\?.*,\1,'` PYTHON_FLAGS="-sPYTHON_ROOT=%{_prefix} -sPYTHON_VERSION=$PYTHON_VERSION" $BJAM $PYTHON_FLAGS -sTOOLS=gcc -sBUILD="debug release" --prefix=$RPM_BUILD_ROOT/%{pfx} %{_prefix} install %Clean rm -rf $RPM_BUILD_ROOT %Files %defattr(-,root,root) %{pfx}/* ==================== cut here ================= so, a couple short questions that might save me some time before i dig into the source: 1) does 1.37.0 still require a "regex" patch? apparently, the patch mentioned above was to address some regex issues identified after 1.31.0 was released? i'm ready to assume that anything that significant has been resolved since then. 2) i'm also assuming that JAM is required for that final packaging step so that part of the spec file is still relevant. in other words, other than dropping the regex patch and updating the version number, does the above spec file look about right for 1.37.0? i'm about to give it a try. thanks. rday -- ======================================================================== Robert P. J. Day Linux Consulting, Training and Annoying Kernel Pedantry: Have classroom, will lecture. http://crashcourse.ca Waterloo, Ontario, CANADA ========================================================================

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Boost.Lambda: failure to compile with std::set, OK withstd::vector, bug?
by Joost Kraaijeveld 04 Jan '09

04 Jan '09

Hi, Compiling the code below with std::vector goes OK, the std::set variant does not compile: /usr/include/boost/lambda/detail/actions.hpp no matching function for call to ‘boost::lambda::function_adaptor<void (Integer::*)()>::apply(void (Integer::* const&)(), const Integer&)’ /usr/include/boost/lambda/detail/actions.hpp return-statement with a value, in function returning 'void' /usr/include/c++/4.3/bits/stl_tree.h invalid type argument of ‘unary *’ Is this a bug or am I doing something wrong (gcc (Debian 4.3.2-1) 4.3.2 / Boost 1.35) ? #include <iostream> #include <vector> #include <set> #include <boost/lambda/lambda.hpp> #include <boost/lambda/algorithm.hpp> #include <boost/lambda/bind.hpp> struct Integer { Integer(int anInt) : integer(anInt){} bool operator<( const Integer& anInteger) const { return integer < anInteger.integer;} void print(){std::cout << integer << std::endl;} int integer; }; int main(int argc, char* argv[]) { // std::vector<Integer> collection(5,2); std::set<Integer> collection(5,2); // Calling a member function std::for_each(collection.begin(), collection.end(), boost::lambda::bind(&Integer::print, boost::lambda::_1)); } TIA -- Groeten, Joost Kraaijeveld Askesis B.V. Molukkenstraat 14 6524NB Nijmegen tel: 024-3888063 / 06-51855277 fax: 024-3608416 web: www.askesis.nl

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BoostCon 2009: Call for participation
by Hartmut Kaiser 04 Jan '09

04 Jan '09

Hi all, Please find below the call for participation for the 3rd annual Boost Conference in Aspen. There are only a couple of days left to submit any proposals. I'm sorry for any duplicates you might receive. Please forward this mail to any related mailing list or any person you think might be interested. Regards Hartmut ---------------------------------------------------------------------------- 3rd annual Boost Conference 2009 Aspen CO, USA, May 3-9, 2009, www.boostcon.com ---------------------------------------------------------------------------- Call for participation ---------------------- Promising to be the main face-to-face event for all things Boost (www.boost.org) BoostCon'09 opens the door to your C++ future. From using the Boost libraries to writing and maintaining them, from evangelizing to deploying Boost within your organization, from infrastructure and process to vision and mission, and from TR1 to TR2 and the new C++0x Standard, BoostCon brings together the sessions, the colleagues, and the inspiration to support your work with C++ and Boost in particular for the next year. To reflect the breadth of the Boost community, the conference includes sessions aimed at two constituencies: Boost end-users and hard-core Boost library and tool developers. The program fosters interaction and engagement within and across those two groups, with an emphasis on hands-on, participatory sessions. Session topics -------------- * Topics of interest include, but are not restricted to, the following: * General tutorial sessions introducing one or more Boost libraries * In-depth sessions on using specific libraries * Case studies on using Boost * Experts panels * Advanced sessions on implementation techniques used within Boost libraries * C++0x and how it will change life for users and library writers * TR1 and TR2 * Development workshops to extend or enhance existing Boost libraries * Workshops on design process * Infrastructure workshops such as Build tools, Website, Testing * Concepts and Generic Programming * Hardware and infrastructure presentations focused on how libraries can make better use of the technology * Other topics likely to be of great interest to Boost users and Developers. Interactive and collaborative sessions are encouraged, as this is the nature of both the on-line Boost community and the style of learning and participation that has proven most successful at such events. Sessions can be tutorial based, with an emphasis on interaction and participant involvement, or workshop based, whether hands-on programming or paper-based, discussion-driven collaborative work. Session formats --------------- Presentations ............. Presentations focus on a practitioner's ideas and experience with anything relevant to Boost and Boost users. Panels ...... Panels feature three or four people presenting their ideas and experiences relating to Boost's relevant, controversial, emerging, or unresolved issues. Panels may be conducted in several ways, such as comparative, analytic, or historic. Tutorials ......... Tutorials are sessions at which instructors teach conference participants specific Boost-relevant skills. Workshops ......... Workshops provide an active arena for advancements in Boost-relevant topics. Workshops provide the opportunity for experienced practitioners to develop new ideas about a topic of common interest and experience. Author's Corner Presentations ............................. These were introduced at BoostCon 2008, and were a great success. They are short (30 minute) sessions, focusing on tips on usage and design. In addition, we're looking to uncover the hidden design gems boost libraries. Tool Vendors Presentations .......................... We actively encourage tool vendors and ISP's to submit proposals for a special Tool Vendors Session Track aimed at products related to Boost and C++ (compilers, libraries, tools, etc.). Other formats may also be of interest. Don't hold back a proposal just because it doesn't fit into a pigeonhole. Submitting a proposal --------------------- Standard Sessions are 90 minutes. You may submit a proposal for fractions or multiples of 90-minutes. Fractional proposals will be grouped into 90 minute sessions covering related topics. Longer sessions, such as tutorials and classes, will be assigned 90 minute, three hour (i.e. half day), or six hour (i.e. full day) time slots. Please include: * The working title. * Type of session: presentation, panel, tutorial, workshop, authors corner, vendor track, other * A paragraph or two describing the topic covered, suitable for the conference web site * Proposed length: 10-20 minute short talks, 45 minutes, 90 minutes, half-day, full day * Alternate lengths, if you are willing to make adjustments: 10-20 minute lightning-talks, 45 minutes, 90 minutes, half-day, full day * Audience: users, developers, both * Level: basic, intermediate, advanced * A biography, suitable for the conference web site * Your contact information (will not be made public) Submission details ------------------ All submissions have to be done through the EasyChair conference management system: http://www.easychair.org/conferences/?conf=boostcon09. If you have not already registered at EasyChair, you will need to do so in order to submit your proposal. All submissions will go through a peer review process. Authors are invited to submit PDF versions of full papers of up to 10 pages in ACM conference proceedings format (see http://www.acm.org/sigs/publications/proceedings-templates) The full papers are not required unless you want them published in the proceedings. All accepted papers will be made available in the Association for Computing Machinery (ACM) Digital Library (approval pending). Best papers, after further reviews, will be considered to be book chapters or journal articles in a renowned journal. The session materials go on the BoostCon CD handed out to attendees. For general information on the BoostCon 2009 paper submission or the scope of technical papers solicited, please refer to the conference website at www.boostcon.com. For any other questions about the submission process or paper format, please contact the Program Committee at boostcon09(a)easychair.com. If you have any technical problems with EasyChair, please contact EasyChair for help. Note: Presenters must agree to grant a non-exclusive perpetual license to publish submitted materials, either electronically or in print, in any media related to BoostCon. Important dates --------------- Proposals for submissions due: January 10th 2009. Proposals acceptances sent (tentative program available): February 10th, 2009 Fully scheduled program available: March 1st, 2009 Session materials due: April 1st 2009. Hartmut Kaiser, email: hartmut.kaiser(a)gmail.com (Program Committee Chair) David Abrahams, email: dave(a)boostpro.com (Conference Chair) On behalf of the conference organizers

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Re: [Boost-users] How to access COM ports
by Max 04 Jan '09

04 Jan '09

Hello Rahul, I'm also interested in such stuff. Look forward to seeing your example! B/Rgds Max ----- Original Message ----- From: master master <master_4_master(a)yahoo.com> To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] How to access COM ports Date: 2009-1-4 10:02:52 Thank youIgor. I will try it today. How to add new example to boost lib docs. If I got success I want to add serial port example to asio lib because it is lacking with the examples. Rahul Boostian :) ------------------------------------------------------------------- 新浪空间——与朋友开心分享网络新生活！(http://space.sina.com.cn/ )

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How to access COM ports
by master master 04 Jan '09

04 Jan '09

How to access COM port using BOOST library. I want to access COM3 port using boost. For socket port the below line works .... ........ boost::asio::ip::tcp::resolver::query query("localhost", "9999"); .......... ..... but how to do it for COM port I tried this .... ....... boost::asio::ip::tcp::resolver::query query("localhost", "COM3"); ......... ....... but it didn't worked. Another problem I am facing is that the network client should be platform-independent but if I use socket.h then it will not work on windows and if I use winsock then it will not run on linux/unix variants. Same for other header files like inet.h etc Rahul To create something exceptional ________________________________ -Master4Master "Confidentiality Warning: This message and any attachments are intended only for the use of the intended recipient(s), are confidential, and may be privileged. If you are not the intended recipient, you are hereby notified that any review, re-transmission, conversion to hard copy, copying, circulation or other use of this message and any attachments is strictly prohibited. If you are not the intended recipient, please notify the sender immediately by return email, and delete this message and any attachments from your system. Virus Warning: Although I have taken reasonable precautions to ensure no viruses are present in this email, I cannot accept responsibility for any loss or damage arising from the use of this email or attachment." Speak out for justice and peace, even if your voice trembles. Add more friends to your messenger and enjoy! Go to http://messenger.yahoo.com/invite/

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