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spirit fileiterator always uses std_iterator on posix
by dieMumiee＠gmx.de 26 Dec '04

26 Dec '04

Hi, Found that code in boost/spirit/iterator/file_iterator.hpp template < typename CharT = char, typename BaseIterator = #ifndef BOOST_SPIRIT_FILEITERATOR_WINDOWS fileiter_impl::std_file_iterator<CharT> #else fileiter_impl::mmap_file_iterator<CharT> #endif > class file_iterator; BOOST_SPIRIT_FILEITERATOR_POSIX which is defined a few lines above is never used. Are there any issues with the posix-mmap code? It "worked" here, I modified the code to : template < typename CharT = char, typename BaseIterator = #if defined(BOOST_SPIRIT_FILEITERATOR_WINDOWS) || defined(BOOST_SPIRIT_FILEITERATOR_POSIX) fileiter_impl::mmap_file_iterator<CharT> #else fileiter_impl::std_file_iterator<CharT> #endif > class file_iterator; Regards, Andreas Pokorny -- +++ Sparen Sie mit GMX DSL +++ http://www.gmx.net/de/go/dsl AKTION f�r Wechsler: DSL-Tarife ab 3,99 EUR/Monat + Startguthaben

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[Boost-bugs] [ boost-Support Requests-1091153 ] ublas extendability 2
by SourceForge.net 25 Dec '04

25 Dec '04

Support Requests item #1091153, was opened at 2004-12-25 10:21 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=207586&aid=1091153&group_… Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: ublas extendability 2 Initial Comment: Hi. I want to multiplicate ublas matrices with custom (non- ublas) vectors. Is there some possibility ? Please see attached files and compilation messages. It seems that the job can be done with more knowledge of ublas tunning. Thank you. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=207586&aid=1091153&group_… ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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[Boost-bugs] [ boost-Support Requests-1091151 ] ublas extendability1
by SourceForge.net 25 Dec '04

25 Dec '04

Support Requests item #1091151, was opened at 2004-12-25 10:18 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=207586&aid=1091151&group_… Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: Nobody/Anonymous (nobody) Assigned to: Nobody/Anonymous (nobody) Summary: ublas extendability1 Initial Comment: Hi. I am using ublas with types other then built in scalars (like "double" or "int"). Typical jobs: prod(matrix<double>,vector<v3d<double> >) or triangular_solve(matrix<double>,vector<v3d<double> >). In order to be able to do it, I have made partial specialization of "promote_traits" template in namespace "boost::numeric::ublas" for my classes. This works. Is this technique good ? Or uBLAS intended only for built in types ? See attached files. Is it good to intervene to ublas namespace, like done in file "vnd.h" at the end. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=207586&aid=1091151&group_… ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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Lambda Question
by Brian Braatz 24 Dec '04

24 Dec '04

Is is possible to, given a functor generated as a result of a lambda bind expression, pull the return type from the lambda functor? (still digging through the lambda bind code and have not found the answer to this yet. I sent a previous post with sample code that shows what I am trying to do) Any help or direction would be greatly appreciated. Thanks Brian

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RE: [boost] Re: Lambda Question
by Brian Braatz 24 Dec '04

24 Dec '04

> -----Original Message----- > On Behalf Of Arkadiy Vertleyb > "Brian Braatz" <brianb(a)rmtg.com> wrote > > > Is is possible to, given a functor generated as a result of a lambda > > bind expression, pull the return type from the lambda functor? > > I am wondering if "result_of" may be something that you are looking for. > OTOH, I don't really know what the status of this library is. > > Regards Thank you for your thoughts- result_of looks like what I want - but I am having difficultly figuring out what the lamda factor LOOKS like after it is compile time generated. (I am (very very) slowly dissecting lambda bind to try to figure this out). IF ANYONE knows the answer to how you would GET TO result_of syntax wise help would be appreciated. (previous mail with sample code below) -----Original Message----- From: boost-bounces(a)lists.boost.org [mailto:boost-bounces@lists.boost.org] On Behalf Of Brian Braatz Sent: Wednesday, December 22, 2004 8:03 AM To: boost(a)lists.boost.org Subject: [boost] Help \ Advice requested on getting the return type from aLambda fctor I wrote up the simple example that shows what I am trying to figure out Basically, I am trying to pull the deduced return type (or explicitly passed as a template param in lambda bind()) in my template. If I have a function that is receiving a functor, I would like to be able to take that functor and pull the RETURN TYPE out of it. Lets say I have a function that returns a string: std::string ReturnAString() { return "this is a string"; } And then here is my template function (code below does not compile) template < typename TFUNCTOR> TFUNCTOR::result_type CallFctorDeduceRet( TFUNCTOR & functor) { return functor(); } Now here is my bind call std::cout << ( bind<std::string>(&ReturnAString)); Is there a way to GET to the return type in the Lambda fctor that was generated with a BIND call? I would like to be able to pull the <std::string> from the bind call and use it in the template function. It is not a problem for my template function to be dependant upon lambda bind. I have been going through the lambda code. And while it is brilliant, I am having a bit of difficulty figuring out what I am looking at (grin). Any help or direction is greatly appreciated FULL SAMPLE CODE HERE: template <typename CURRIEDTYPE> // Id class for currying type without creating the object class Id { public: typedef CURRIEDTYPE TYPE; }; // Explictly pass IN a return type template < typename TFUNCTOR, typename TRET> TRET CallFctorPassInRet ( TFUNCTOR & functor, Id<TRET> & ) { Id<TRET>::TYPE TRet; TRet = functor(); return TRet; } std::string ReturnAString() { return "this is a string"; } // try to get return type from the lambda fctor // Below does not compile- but it is along the lines of what I // WANT to do- note that I am trying to get from the Lambda functor the deduced return type template < typename TFUNCTOR> TFUNCTOR::result_type CallFctorDeduceRet( TFUNCTOR & functor) { return functor(); } void Test_LambdaRetDeduction() { std::cout << "CallFctorPassInRet returns [" << CallFctorPassInRet( bind(&ReturnAString), Id<std::string>()) << "]" << std::endl; // below is what I want to make work std::cout << "CallFctorDeduceRet returns [" << CallFctorDeduceRet( bind<std::string>(&ReturnAString)) << "]" << std::endl; }

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[logo] Happy Holydays...
by Rene Rivera 24 Dec '04

24 Dec '04

Boosters, Thought I'd give a tiny present for all... http://tinyurl.com/5kne3 http://boost-sandbox.sourceforge.net/vault/files/Boost%20Logos/Rene%20River… -- -- Grafik - Don't Assume Anything -- Redshift Software, Inc. - http://redshift-software.com -- rrivera/acm.org - grafik/redshift-software.com - 102708583/icq

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Problems compiling Boost.Test example with gcc under Linux
by Noel Llopis 24 Dec '04

24 Dec '04

I suspect the answer to this is going to be really simple, but I've been trying to figure it out for several hours and I'm ready to give up (I couldn't even find a mention of the problem in the mailing list archives). All I want to do is use the Boost Unit Test library with gcc under Linux. I have Boost 1.32 correctly installed (I've used other libraries successfully without any problems). Now I simply try to compile the simplest possible example: http://www.boost.org/libs/test/example/unit_test_example1.cpp This is what I get: gcc -o test boost_test.cpp boost_test.cpp:11: error: `boost::unit_test' has not been declared boost_test.cpp:11: error: expected nested-name-specifier before "test_suite" boost_test.cpp:11: error: `test_suite' has not been declared boost_test.cpp:23: error: expected constructor, destructor, or type conversion before '*' token boost_test.cpp:23: error: expected `,' or `;' before '*' token boost::unit_test has not been declared??? How is that possible? The compiler is correctly including the boost/test/unit_test.hpp file from the first line of the program. What am I missing? It must be something really, really stupid. I can tell :-) Happy holidays everyone! --Noel Games from Within http://www.gamesfromwithin.com

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filesystem lib patch
by François Dumont 24 Dec '04

24 Dec '04

Find attached a patch for the filesystem library. remove and rename symbols are injected within the std namespace before being defined by the inclusion of cstdio header. The patch make the code less Standard library implementation dependent. Francois Dumont

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Some observation re libraries as DLLS
by Robert Ramey 24 Dec '04

24 Dec '04

I'm making adjustments in the build and test Jamfiles to take into account changes made to permit the serialization library to be built and used as a DLL. This as raised a couple of questions in my mind. Re: the Jamfile for test a) It would seem to me that if the test is to be built and run with <runtime-link>dynamic - indicating the usage of C++ runtime dll, that the default build for the test should be to use the dll versions of all the libraries. I've managed to do this in sort of a kludgy way and it might be working. But I'm still working on it. b) the above raises the issue of how one should specifiy a target be built to use the dll vs the static library. <runtime-link>dynamic does something else. I was looking for a variant but I don't find it. I'm thinking that the way its done in the Program Options library is the way to go. c) when using the dll versions of boost libraries, the dll has to be on the path (at least with windows). It seems that bjam takes care of this automatically. So its only a problem when I want to debug the app with my VC IDE. It might be a good idea if the document mentioned this. d) The section on Testing Auto-linking in .../more\separate_compilation.html leaves me extremely confused. If I try to build the test without auto-linking by including the BOOST_???_NO_LIB then the libraries names searched for don't match the onces created by the build Jamfile. That its the above define doesn't get propogated to the build Jamfile and I don't know how it would. If I alter my Jamfile so that it doesn't include common-variant-tag as a target. The when the bjam stage is invoked, the libraries won't have the version specfic stuff. The situation is made even more compilicated by the fact that I have one dll (boost_wserialization.dll) which calls into another one (boost_serialization.dll). I've made it work by using the variant tags all the time - that is never using BOOST_???_NO_LIB. But now I'm concerned the the section at the end of the reference which seems to suggest that this won't work on platforms which don't suppor t auto-link. This seemed very simple when I started, but now I'm trying to get the details right and I'm having lots of nagging issues like the above. Its actually harder to figure out than the serialization library itself. Robert Ramey

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mpl::inherit_linearly reuse to produce loki's tuple?
by Larry Evans 24 Dec '04

24 Dec '04

Could inherit_linearly be used to create something like loki's tuple? The name, inherit_linearly, and a very brief look at the code suggests it does something like loki's GenScatterHeirarchy, which was used to create the loki tuples as shown in: http://cvs.sourceforge.net/viewcvs.py/loki-lib/loki/Reference/HierarchyGene… If so, then I was wondering if it would be worth it to reuse inherit_linearly to implement boost's tuple?

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