- Boost - lists.boost.org

Re: [boost] [function] allocator template parameter question
by Emil Dotchevski 08 Jun '07

08 Jun '07

> Ah, right. I was looking at part of the code where the allocator > wasn't being passed on, but of course that part of the code didn't > need to do any allocation. Two comments:> > (1) Often, one inherits from the allocator rather than storing it > in a member. That way, if the allocator type is empty, we don't need > to use up any storage. Oh sure. What was I thinking? I'll fix this tomorrow. :) > (2) Visual C++ strikes again: we'll have to #ifdef out these > allocator versions for Microsoft's compiler prior to version 7.1, > both because of the reliance on partial specialization of class > templates and because of the use of rebind. I haven't been using older MSVC compilers ever since they released 7.0, and I don't have a 6.0 handy at the moment. If I remember correctly, member function templates don't work on 6.0 so I guess you're right, all the allocator stuff will have to be ifdef'd out. Emil Dotchevski _________________________________________________________________ Hotmail to go? Get your Hotmail, news, sports and much more! Check out the New MSN Mobile! http://mobile.msn.com

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[signals] could last_value<void>::result_type be set to void instead of to last_value<void>::unusable?
by Stjepan Rajko 08 Jun '07

08 Jun '07

Hello, For the default signal combiner last_value, last_value<void>::result_type is currently set to last_value<void>::unusable. On compilers which support void returns, it seems like it would be more beneficial to set it to void instead. I.e., template<> struct last_value<void> { #ifdef BOOST_NO_VOID_RETURNS struct unusable {}; public: typedef unusable result_type; #else public: typedef void result_type; #endif // BOOST_NO_VOID_RETURNS ... I have submitted trac ticket #1043 to this effect with the trivial patch attached, in case this change would be OK. Thanks, Stjepan

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Whats happend Web UI for Soc 2006
by Shams 08 Jun '07

08 Jun '07

Hi, https://www.boost-consulting.com:8443/svn/main/boost/soc/2006/tree/trunk/ I can only see plain old text. Thanks Shams --

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Re: [boost] [function] allocator template parameter question
by Emil Dotchevski 08 Jun '07

08 Jun '07

> On Jun 4, 2007, at 10:57 PM, Emil Dotchevski wrote:> > One important advantage of using boost::function is that it acts > > like a> > function pointer, reducing physical coupling between compilation > > units. This> > is very much like shared_ptr.> >> > A nice feature of shared_ptr is that it has a single template > > parameter, T,> > even though diferent instances of shared_ptr<T> can use different> > allocators.> >> > When using boost::function, one can also provide an allocator, but > > unlike> > shared_ptr, the allocator is a default parameter of the > > boost::function> > class template.> > > Is there a reason why this is necessary? Can't boost::function use > > similar> > technique to the one employed by shared_ptr to avoid the need for this> > second template parameter?> > You know, I never even thought about adding it. I didn't know about > the shared_ptr technique when I put the allocator into > boost::function, and after the C++ committee removed the allocator I > didn't think about it any more. Perhaps if the allocator it's moved to the constructor, the committee would accept it? :) > <snip>> I don't know when I would have time to implement this, although I > would certainly consider adding this functionality to Boost's > "function". Might you be interested in implementing it? OK, I'll give it a shot, and I'll let you know how it goes. Emil Dotchevski _________________________________________________________________ Live Earth is coming. Learn more about the hottest summer event - only on MSN. http://liveearth.msn.com?source=msntaglineliveearthwlm

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[xpressive] "quantifier not expected" exception when using non-capturing group
by Jean-Francois Bastien 08 Jun '07

08 Jun '07

Here is a simplification of my expression: sregex expression = sregex::compile( /* 1 */ "^(" /* 2 */ "c[^\r\n]*(?:\r?\n|\r)" /* 3 */ "(?:" /* 4 */ "(?!c)" /* 5 */ "[^\r\n]*(?:\r?\n|\r)" /* 6 */ ")*" /* 7 */ ")" ); Basically: match lines starting with a "c" and the line that follow, until another line starting with a "c" is found. This gives a "quantifier not expected" exception. Changing line 3 to a normal group solves the problem. Changing lines 2 and 5's groups to normal groups also solves the problem. This expression seems to work fine in PowerGREP. JF

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Re: [boost] [fusion] implementing distance_impl<>
by dan marsden 07 Jun '07

07 Jun '07

Eric Niebler wrote: >> The defect above should now be fixed on HEAD. > >Great, thanks! If you haven't done so already, you may want to change >all of your own distance_impl<> implementations so that they do not have >a nested ::value. That way, your own tests will catch this problem if it >ever creeps back in. Ditto for size_impl<>. > >Just a suggestion. A good suggestion, we do need to tighten up the tests in that area. I'm also going to fix the distance implementation so that both ::type and ::value are sure to work, even in the absence of a ::value in the _impl type. Similarly for size. That will give Fusion the same convenience as MPL. It might be a couple of days before I get a chance for that one though. Cheers Dan ___________________________________________________________ The all-new Yahoo! Mail goes wherever you go - free your email address from your Internet provider. http://uk.docs.yahoo.com/nowyoucan.html

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Re: [boost] [fusion] implementing distance_impl<>
by dan marsden 07 Jun '07

07 Jun '07

>>The problem is with distance<begin, end>::value. My distance_impl<> >>doesn't provide a nested value. It provides a nested type. If this were >>distance<begin, end>::type::value, it works. It also works if I change >>my distance_impl<> specialization, but I don't think I should have to. Bug? >From what I can see in the MPL docs, a numeric metafunction is only required to >return ::type, and ::value is just a convenience that I shouldn't count on. So >I agree, a bug. I'll patch up shortly, thanks for picking this up. The defect above should now be fixed on HEAD. Cheers Dan ___________________________________________________________ Yahoo! Answers - Got a question? Someone out there knows the answer. Try it now. http://uk.answers.yahoo.com/

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[Probability] release of probability library with bjam support
by Brook Milligan 07 Jun '07

07 Jun '07

After figuring out the rudiments of bjam, I have released a version of the Probability library in the Boost Vault: boost.probability-0.2.1.tar.gz My hope is that this makes it much easier to integrate into an existing Boost system for testing and use. I would greatly appreciate any comments and helpful suggestions for improvement. Once again, the main documentation is available at http://biology.nmsu.edu/software/probability/ Thank you very much for any helpful reviews. Cheers, Brook

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Re: [boost] [boost@home] revolutionary solution to create a testing farm
by Alexander Nasonov 07 Jun '07

07 Jun '07

07.06.07, 16:24, Janek Kozicki <janek_listy(a)wp.pl>: > Hi, > Although the roots of my idea were different it turns out to be very > similar to well known SETI@Home project. Therefore I call it Boost@Home :) If your goal is to test many OSes on the most popular desktop OS, then I see at least one other approach: cross-compilation. It doesn't cover all compilers and tricky for "run" test targets but it has some advanges as well: - Quick build for embedded devices. - Better compile-time and link time dependency tracking. - Environment separation. In order to run tests, they have to be copied to target platform. Any missing dependency will show up. Of course, this change would introduce two different kind of testers: compile farms and runners. Testing boost without actually compiling it would attact more people and hopefully it would cover less popular OSes. If NetBSD can be compiled on cygwin, why boost can't?! ;-) -- Alexander Nasonov

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Boost inspection notification (2007-06-07/RC_1_34_0) *X*
by Rene Rivera 07 Jun '07

07 Jun '07

Boost Inspection Report Run Date: 16:05:49 UTC, Thursday 07 June 2007 An inspection program <http://www.boost.org/tools/inspect/index.html> checks each file in the current Boost CVS for various problems, generating this as output. Problems detected include tabs in files, missing copyrights, broken URL's, and similar misdemeanors. Totals: 11453 files scanned 909 directories scanned (including root) 193 problems reported Problem counts: 0 files with invalid line endings 0 bookmarks with invalid characters 3 invalid urls 101 broken links 21 unlinked files 22 file/directory names issues 2 files with tabs 9 violations of the Boost min/max guidelines 35 usages of unnamed namespaces in headers (including .ipp files) Summary: archive (3) bind (1) boost-root (1) build (1) date_time (1) doc (2) filesystem (33) graph (3) iostreams (2) lambda (3) math (8) more (4) mpl (4) multi_array (2) ptr_container (1) python (8) regex (1) regression (32) serialization (1) test (81) type_traits (1) Details: *R* invalid (cr only) line-ending *A* invalid bookmarks, invalid urls, broken links, unlinked files *N* file/directory names issues *T* tabs in file *M* uses of min or max that have not been protected from the min/max macros, or unallowed #undef-s *U* unnamed namespace in header |archive| 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libs/filesystem/doc/tr2_proposal.html: *A* invalid URL (hardwired file): file:///C|/boost/site/libs/filesystem/doc/operations.htm#complete_note |graph| boost/graph/relax.hpp: *T* libs/graph/example/file_dependencies.cpp: *M* violation of Boost min/max guidelines on line 139 libs/graph/test/serialize.cpp: *T* |iostreams| libs/iostreams/doc/concepts/multi-character.html: *A* unlinked file libs/iostreams/doc/installation.html: *A* broken link: ../../../tools/build/v1/build_system.htm |lambda| boost/lambda/core.hpp: *U* unnamed namespace at line 62 boost/lambda/detail/lambda_functors.hpp: *U* unnamed namespace at line 25 boost/lambda/exceptions.hpp: *U* unnamed namespace at line 24 |math| libs/math/test/common_factor_test.cpp: *M* violation of Boost min/max guidelines on line 146 *M* violation of Boost min/max guidelines on line 147 *M* violation of Boost min/max guidelines on line 193 *M* violation of Boost min/max guidelines on line 194 |more| more/cvs.html: *A* unlinked file 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