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[review][pimpl_ptr] Pimpl Pointer review begins
by Rene Rivera 29 May '06

29 May '06

The review of the pimpl_ptr library by Asger Mangaard starts today, Monday May 15th, 2006, and runs through May 25th, 2006. (Boost Reviews RSS feed <http://tinyurl.com/ogpj6>) Pimpl Pointer ------------- :Author: Asger Mangaard :Download: Boost Sandbox (http://boost-consulting.com/vault/) as "pimpl_ptr.zip". Direct download at <http://tinyurl.com/m66ox>. :Description: The pimpl idiom is widely used to reduce compile times and disable code coupling. It does so by moving private parts of a class from the .hpp file to the .cpp file. However, it's implementation can be tricky, and with many pitfalls (especially regarding memory management). The pimpl_ptr library is a single header file, implementing a special policy based smart pointer to greatly ease the implementation of the pimpl idiom. Review questions ---------------- Please always explicitly state in your review, whether you think the library should be accepted into Boost. You might want to comment on the following questions: - What is your evaluation of the design? - What is your evaluation of the implementation? - What is your evaluation of the documentation? - What is your evaluation of the potential usefulness of the library? - Did you try to use the library? With what compiler? Did you have any problems? - How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? - Are you knowledgeable about the problem domain? Enjoy, Rene. -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com -- 102708583/icq - grafikrobot/aim - grafikrobot/yahoo

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[BGL] property tag classes and "num"
by Jens Müller 29 May '06

29 May '06

From <http://www.boost.org/libs/graph/doc/using_adjacency_list.html#sec:adjacency…>: | Custom Edge Properties | | Creating your own property types and properties is easy; just define a | tag class for your new property. The property tag class will need to | define num with a unique integer ID, and kind which should be either | edge_property_tag, vertex_property_tag, or graph_property_tag. | | struct flow_t { | typedef edge_property_tag kind; | }; | | struct capacity_t { | typedef edge_property_tag kind; | }; It works with structs like this. Am I missing something, or where is "num"?

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[Serialization] Serializing boost::tuples
by Christian Henning 29 May '06

29 May '06

Hi there, I know that serializing of std::pair is part of the current serialization lib. I'm just wondering if there is something for the boost's tuples? Is it maybe in a different header file? I think that would be a cool feature and not so difficult to implement. But maybe I'm naive? Thanks, Christian

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rule install unknown
by Bert Verbeek 29 May '06

29 May '06

Hello All, after some years of using jam, I tried to switch to bjam today. I'm using deb packages from the debian linux testing distro: bjam-3.1.11-1 boost-build-2.0-m10-1 (Building bjam myself from sources gave exactly the same result) Compiling a very simple qt4 application file is no problem. But installing it in a dist directory will not happen? bjam reports: src/Jamfile:7: in modules.load rule install unknown in module Jamfile</home/bert/projects/qscope/src>. /usr/share/boost-build/build/project.jam:255: in load-jamfile /usr/share/boost-build/build/project.jam:67: in load /usr/share/boost-build/build/project.jam:71: in project.load /usr/share/boost-build/build-system.jam:75: in load /usr/share/boost-build/kernel/modules.jam:259: in import /usr/share/boost-build/kernel/bootstrap.jam:120: in boost-build /usr/share/boost-build/boost-build.jam:1: in module scope ---- qscope/src/Jamfile --------------------------------------- exe qscope : main.cpp : <library>/usr/lib/libQtCore.so <library>/usr/lib/libQtGui.so ; install dist : qscope ; ------------------------------------------------------------------ Searching the net/user mailing list and reading bjam -d9 output didn't help me. Can you give me a hint how to proceed? Thanks in advance. Kind regards Bert Verbeek

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Re: [Boost-users] [Test] Is It Possible to Put Test Cases in DLL?
by Wu Yinghui, Freddie 29 May '06

29 May '06

boost-users-request(a)lists.boost.org wrote: >> "Wu Yinghui, Freddie" <yhwu(a)volumeinteractions.com> wrote in message >> news:4476BDAD.5060100@volumeinteractions.com... > > This option is available with CVS version of Boost.Test. Here is what you > need to do: Thanks for your reply, Gennadiy. But does this mean that I cannot achieve this without the latest CVS update? Since our development team is using only the stable releases, I guess I'll have problem with this approach. > 1. Build DLL version of UnitTestFramework. > 2. Build DLL with your test cases. > 3. Buils console_test_runner utility from libs/test/tools > > Now it's all you need. If you have any questions regarding any of the steps > above please ask. > >> I'm using the auto registration facility now to create and register the >> test suites and cases. And I'm running on MSVC 7.1 on Windows XP SP2 now. > > I have test_runner_test to specifically test this situation. Cheers, Freddie -- Wu Yinghui, Freddie Research & Development Software Engineer Volume Interactions Pte Ltd 1 Kim Seng Promenade, #12-01 Great World City East Tower Singapore 237994 Tel: +65 62226962 (Ext 216) Fax: +65 62226215 Email: yhwu(a)volumeinteractions.com URL: http://www.volumeinteractions.com Important: This message is intended for the recipient(s) addressed above. It contains privileged and confidential information. If you are not the intended recipient, please notify the sender immediately by replying to this message and then delete it from your system. You must not read, copy, use, or disseminate this communication in any form. Thank you.

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[Getting Started][Build] [v2] Is it "Boost Build" or "Boost Build V2"
by Andy Little 29 May '06

29 May '06

Further helpful (I hope) criticism of the getting started Docs for boost 1.33.1 In http://www.boost.org/doc/html/bbv2/installation.html In the heading section entitled Chapter22 Installation, paragraph numbered 2. The second sentence reads: "Go to the Boost.Build root directory and run bjam --version. You should see: " etc It is too easy to assume this refers to the directory $(BOOST_ROOT)/build rather than $(BOOST_ROOT)/build/v2 and if you execute the command there you get a cryptic error message. I think what is referred to here as the Boost Build directory is referred to previously as the Boost Build V2 directory ( I feel however that it is quite likely to arrive here without having read that anyway). The physical location of v2 under the build directory can add to the confusion It might help to always refer to the directory explicitly as the Boost Build v2 directory. HTH regards Andy Little

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[regex] Strange behavior with greediness operators?
by Christopher Hart 28 May '06

28 May '06

All: I think I'm seeing strange behavior with the greediness operators in Boost.Regex (1.33.1, Mac OS 10.4.6), but was hoping someone could confirm that I'm using them correctly. For example, the following two calls: find_matches(".*a href=(.*?)>", "<html><head><title>test</title></head><body>this is a test <a href=testlink.html> more text</body></html>"); find_matches(".*a href=(.*)>", "<html><head><title>test</title></head><body>this is a test <a href=testlink.html> more text</body></html>"); Produce the same output: Expression: ".*a href=(.*?)>" Text: "<html><head><title>test</title></head><body>this is a test <a href=testlink.html> more text</body></html>" ** Match found ** Sub-Expressions: $0 = "<html><head><title>test</title></head><body>this is a test <a href=testlink.html> more text</body></html>" $1 = "testlink.html> more text</body></html" Captures: $0 = { "<html><head><title>test</title></head><body>this is a test <a href=testlink.html> more text</body></html>" } $1 = { "testlink.html> more text</body></html" } Expression: ".*a href=(.*)>" Text: "<html><head><title>test</title></head><body>this is a test <a href=testlink.html> more text</body></html>" ** Match found ** Sub-Expressions: $0 = "<html><head><title>test</title></head><body>this is a test <a href=testlink.html> more text</body></html>" $1 = "testlink.html> more text</body></html" Captures: $0 = { "<html><head><title>test</title></head><body>this is a test <a href=testlink.html> more text</body></html>" } $1 = { "testlink.html> more text</body></html" } It seems like the (.*?) expression should match only "testlink.html", as the ">" character terminates the pattern and would consume the least amount. (This same expression is working as written in Perl.) The find_matches function looks like: void find_matches(const std::string& regx, const std::string& text) { boost::regex e(regx); boost::smatch what; std::cout << "Expression: \"" << regx << "\"\n"; std::cout << "Text: \"" << text << "\"\n"; if(boost::regex_match(text, what, e, boost::match_extra | boost::match_partial)) { unsigned i, j; std::cout << "** Match found **\n Sub-Expressions:\n"; for(i = 0; i < what.size(); ++i) std::cout << " $" << i << " = \"" << what[i] << "\"\n"; std::cout << " Captures:\n"; for(i = 0; i < what.size(); ++i) { std::cout << " $" << i << " = {"; for(j = 0; j < what.captures(i).size(); ++j) { if(j) std::cout << ", "; else std::cout << " "; std::cout << "\"" << what.captures(i)[j] << "\""; } std::cout << " }\n"; } } else { std::cout << "** No Match found **\n"; } } Am I missing something in the usage, or is this a bug? Any guidance is appreciated. Thanks, Chris Hart

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[datetime] Parametrization of class datetime.
by Seweryn Habdank-Wojewódzki 26 May '06

26 May '06

Hi! I wonder if there is any posibility to change boost::datetime result class eg. long to any bignum class eg. from GMP library or double type. It is important question for calculation distance between let's say 1900 and 2100 and using method eg. total_seconds(). There is no methods like total_minutes(), total_hours(), total_days() and so on, so if I would like to have a distance in days I have to calculate distance in seconds and recalculate it to days, but for big distances total_seconds() exceeded long ranges. Regards. -- |\/\/| Seweryn Habdank-Wojewódzki `\/\/

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[lambda]lambda and lexical_cast
by Antonio Piccolboni 25 May '06

25 May '06

I just wanted to transform a vector of integers into a vecotr of strings, doesn't seem to be asking much transform(ilabels.begin(), ilabels.end(), labels.begin(), lexical_cast<string>(_1)); gcc 4.0.2 doesn't like it at all /usr/include/boost/lexical_cast.hpp:144: error: 'const class boost::lambda::lambda_functor<boost::lambda::lambda_functor_base<boost::lambda::bitwise_action<boost::lambda::leftshift_action>, boost::tuples::tuple<std::basic_stringstream<char, std::char_traits<char>, std::allocator<char> >&, boost::lambda::lambda_functor<boost::lambda::placeholder<1> >, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type, boost::tuples::null_type> > >' has no member named 'fail' <begin polemic, use flame retardant> Is it only me or does lambda lack orthogonality with anything else? Whenever I use lambda for anything non isomorphic to the the plain vanilla examples, the compiler goes ballistic <end polemic> Thanks Antonio

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Re: [Boost-users] [lambda]lambda and lexical_cast
by Sohail Somani 25 May '06

25 May '06

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of > Antonio Piccolboni > <begin polemic, use flame retardant> > Is it only me or does lambda lack orthogonality with anything > else? Whenever I use lambda for anything non isomorphic to > the the plain vanilla examples, the compiler goes ballistic > <end polemic> That's why they're adding lambda functions to C++. Of course theyre not polymorphic so IMHO that makes them useless.

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