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Extracting uBLAS from boost
by JohnnyRep 24 Jul '10

24 Jul '10

Hi! I am new to boost and I am mainly interested in the uBLAS library. As far as I understood it should be possible to extract that module with BCP and build it later on with BJAM?! I) So I downloaded the newest boost release. II) $ bcp uBLAS config build ~/workspace/libs/uBLAS Which seemed to be successful. At least I got all the expected folders to the chosen destination. I also got a boost-build.jam in my directory, so I tried a simple III) $ bjam toolset=gcc Which leads to: error: error: no Jamfile in current directory found, and no target references specified. May be I did that all in the wrong way, but there's no real HOWTO out there (especially for the last step). Hope someone can help me out!? Many thanks! J.R. -- View this message in context: http://old.nabble.com/Extracting-uBLAS-from-boost-tp29250085p29250085.html Sent from the Boost - Users mailing list archive at Nabble.com.

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Boost services
by Bo Jensen 24 Jul '10

24 Jul '10

I have a small business which uses boost quite a lot, thanks for all the great code. I am missing some features at the moment. Is it either possible to donate to get some things done or does some qualified people offer such services for a fee ? More specifically I would like to see the doxygen integration being expanded.

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[geometry] periodic boundary conditions
by alfC 24 Jul '10

24 Jul '10

Hi, I am starting to investigate the boost.geometry library. One of the applications I have already for it is in the context of particle simulations. I still have not much idea of the architecture of the library but it seem very powerful. So for example I was wondering if geometry has facilities for distances and points living in 3D periodic boundary conditions. Topologically it is a torus but with euclidean distance. If somebody could point where to look I will appreciate it. Thank you, Alfredo

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Re: [Boost-users] [boost] Phoenix3 port to proto complete
by Ahmed Charles 23 Jul '10

23 Jul '10

> > std::bind and boost::bind are both monomorphic. phoenix::bind is > polymorphic! Would you (or anyone else) mind explaining polymorphic vs monomorphic in this context? Or point to an explanation? Thanks.

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[asio] endpoint lifetime requirements with acceptor
by Jeff Flinn 23 Jul '10

23 Jul '10

What is the lifetime requirement of a boost::asio::ip::tcp::endpoint imposed by boost::asio::ip::tcp::acceptor. in particular it's ctor: boost::asio::ip::tcp::acceptor(boost::asio::io_service& io_, const endpoint_type&, bool); The end point is taken by const&. Is it just used, copied, or does the acceptor hold a const&? Are these sorts of issues documented? The only clue I can find is that the endpoint has a copy ctor. I can successfully construct the acceptor, passing in a temporary endpoint which is constructed in place in the acceptor's ctor, which appears to execute on both Win/MSVC8 and Mac/XCode3.2. But if I construct an endpoint further up the call stack passing it by const&, I get a runtime error. Any help appreciated. Thanks, Jeff

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[Boost.Range] Filter adaptor
by Justin Leonard 23 Jul '10

23 Jul '10

I think I'm missing something obvious - but here goes. I'm trying to rewrite the a loop similar to the following using boost::range: [code] boost::range_iterator<Doubles>::type i = boost::begin(first_range); boost::range_iterator<Doubles>::type j = boost::begin(second_range); for( ; i != boost::end(first_range) && j != boost::end(second_range); ++i,++j) { if( f(*i) ) g(*j); } [/code] Is there something similar to: [code] for_each( filtered( second_range,first_range,f ) , g ); [/code] to use in place of the above? Thanks, Justin Leonard

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break and return statement in lambda expression
by Conoscenza Silente 23 Jul '10

23 Jul '10

Hi All I created a lambda expression inside my std::for_each call. Inside it there is code like this one, but I have building error telling me that error: expected primary-expression before ‘break’ error: expected `]' before ‘break’ Do you know what it is and how to fix it? The same applies to return statement Thanks AFG namespace bl = boost::lambda; int a, b; bl::var_type< int >::type a_( bl::var( a ) ); bl::var_type< int >::type b_( bl::var( b ) ); std::for_each( v.begin(), v.end(), ( if_( a_ > _b_ ) [ std::cout << _1, break ] ));

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[program option] accepting list of enumerated values ?
by John Dlugosz 22 Jul '10

22 Jul '10

I want a program to take an option that is one or more values from a short list; i.e. an enumeration. For sake of a simple example, let's use color names: "red", "yellow", "blue", "green", etc. I'd like to validate that only legal strings are passed, and convert them to an enumerated type or integer. Certainly I can write po::value<std::vector<color_t> >, but what's the best way to process the input? The docs shows a brief example of overloading 'validate' but it's not clear. I'd also like a short way to specify multiple colors without repeating the option. Something like --color=red,blue but whatever the natural syntax is. Is a multi-value on one instance of a switch something that's built in? Thanks, --John TradeStation Group, Inc. is a publicly-traded holding company (NASDAQ GS: TRAD) of three operating subsidiaries, TradeStation Securities, Inc. (Member NYSE, FINRA, SIPC and NFA), TradeStation Technologies, Inc., a trading software and subscription company, and TradeStation Europe Limited, a United Kingdom, FSA-authorized introducing brokerage firm. None of these companies provides trading or investment advice, recommendations or endorsements of any kind. The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.

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[range] Boost.Range adaptor return types
by Jeremiah Willcock 22 Jul '10

22 Jul '10

I would like to return an adapted Boost.Range from a function and would like to know what return type to put for the function. In my case, I am wrapping a counting_range with transformed(). Is there a metafunction to compute these return types? Should I just be using boost::result_of? The result_of expression is very long because of the nesting (though of course a typedef can help with the inner parts of that). Thank you for your help. -- Jeremiah Willcock

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Support for dimentionality reduction techniques.
by Khaldoun "Hal" Alaqqad 22 Jul '10

22 Jul '10

Hi, I am curious to whether boost provides / supports any of the dimensionality reduction algorithms : 1- Eigen value/ Eigen vector decomposition. 2- Principle component analysis 3- Latent Symantec analysis. 4- MDS Thanks Hal

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