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[random] Use of make_unsigned/make_signed
by John Maddock 14 Mar '12

14 Mar '12

Several of the random number distributions use make_[un]signed internally. However, this trait is not intended as a customization point for UDT's - it's only supposed to be instantiated for integer or enum types - and yes that's a deliberate decision that's now enshrined in the standard ;-) Unfortunately this means that these distributions can't be instantiated on UDT's - big number types for example. Since it seems that these traits are only used to obtain a type that is large enough to store a difference between the endpoints of a range, would it be possible for these to change to use something like: namespace boost{ namespace random{ template <class T> struct range_type : public make_signed<T> { }; }} Then range_type could be [partially-] specialized for UDT's. Note that for some types, there might simply not be a corresponding unsigned type at all, but I'm assuming that doesn't foul up the logic, as long as the type is wide enough? Comments? Thanks, John.

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[random] independent_bits_engine
by John Maddock 14 Mar '12

14 Mar '12

Am I correct in thinking that the independent_bits_engine produces a uniform distribution? I'm interested in using it with arbitrary precision integers to produce B-bit random numbers for the record, Thanks, John.

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Is there interest in static code analysis?
by Antony Polukhin 14 Mar '12

14 Mar '12

Because of some interest on this topic, I would like to clarify some things: Of course you can have some trial version and use it by yourself, BUT more mature solution would be to find a "boost's liason contact". This contact will interact with the company, provide access to reports for developers. In that case all developers can get access to reports without downloading/installing the trial version and use static analysis tool for a longer time. That case will also require from a "boost's liason contact" to look carefully through the license for that tool and agree to it as a maintainer of a whole boost project (I am not permitted to take such solutions). Best regards, Antony Polukhin

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As of 1.49, I am completely unable to build boost with PDB files using VS2010
by Michael Goldshteyn 14 Mar '12

14 Mar '12

Whatever changes were made in 1.49 made it impossible for me to build a debug version of the boost libraries with PDB files. I am using the following command line: ----- bootstrap b2 --without-mpi --without-python --build-dir=vc100-bld-64-bit --build-type=complete --toolset=msvc-10.0 --stagedir=64-bit-vc100 debug-symbols=on debug-store=database ----- I am getting errors like: libs\math\build\..\src\tr1\assoc_laguerre.cpp(6) : error C2858: command-line option 'program database name (/Fde:\dev\devel\libs\boost\boost_1_49_0\vc100-bld-64-bit\boost\bin.v2\libs\math\build\msvc-10.0\debug\debug-store-database\link-static\runtime-link -static\libboost_math_tr1-vc100-sgd-1_49.pdb)' inconsistent with precompiled header, which used '/Fde:\dev\devel\libs\boost\boost_1_49_0\vc100.pdb' libs\math\build\..\src\tr1\assoc_laguerre.cpp(6) : error C2859: e:\dev\devel\libs\boost\boost_1_49_0\vc100-bld-64-bit\boost\bin.v2\libs\math\build\msvc-10.0\debug\debug-store-database\link-static\runtime-link-static\libboost_math_tr1-vc100-sgd-1_49.pdb is not the pdb file that was used when this precompiled header was created, recreate the precompiled header. I've tried turning off precompiled headers using pch=off, but still get errors preventing me from building. I have to completely remove the debug-store=database build option to get a build, but then I have no PDB files at all for the boost libraries. Thanks for any help, Michael Goldshteyn

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GSoC 2012
by Devashish Tyagi 14 Mar '12

14 Mar '12

Hello, I am Devashish Tyagi, an Undergraduate Student of Computer Science and Engineering at Indian Institute of Technology, Delhi. I am currently in my Third Year. I have a considerable experience of coding in C++ and strong background in the field of Algorithms. I would like to be part of Boost C++ Library for GSoC 2012. I went through the Ideas page here<https://svn.boost.org/trac/boost/wiki/SoC2012>. I would like to extend Boost.Graph by implementing the requests mentioned on this page<http://www.boost.org/doc/libs/1_49_0/libs/graph/doc/challenge.html>. Among the Challenges mentioned, I am particularly interested in implementing Dynamic Graph Algorithms and a minimum cost maximum flow Algorithm. Could someone guide me as to from where should I begin my research and Is there a priority order among the requests/challanges mentioned on this page<http://www.boost.org/doc/libs/1_49_0/libs/graph/doc/challenge.html>. Regards -- Devashish Tyagi 2nd Year Undergraduate Computer Science and Engineering Dept.

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Boost.Build maintenance
by Bruno Santos 14 Mar '12

14 Mar '12

Hi, I been submitting some patches in trac, but I noticed there's no activity there for boost.build. Since I use boost.build extensively and I would like to volunteer as maintainer for it. Regards, Bruno

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[xpressive] Compiler error; seems like normal usage?
by Robert Dailey 13 Mar '12

13 Mar '12

My regex is as follows: sregex re = "Content-Disposition:" >> +_s >> (s1=!"inline;") >> -*_ >> "size=" >> (s2=+_d) >> ';' ; This seems to be the part causing the compiler errors: (s1=!"inline;") When I change it to this: !(s1="inline;") It compiles just fine. I'm on VS2008 SP1. Anyone know why the former usage does not work? I still want the group to capture an empty string if the string "inline;" does not match, which is why I put the ! inside the capture group. Does this matter? --------- Robert Dailey

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Boost 1.49 BOOST_PP_ITERATION_FLAGS(): causes build failures; would like a boost maintainer comment
by Steve M. Robbins 13 Mar '12

13 Mar '12

Would really appreciate if ticket 6631 is a Boost bug that I can patch for Debian, or whether it is just API breakage that boost-using packages (like luabind) must adapt to. Thanks, -Steve #6631: BOOST_PP_ITERATION_FLAGS(): error: missing binary operator before token "(" --------------------------------+------------------------------------------- Reporter: peter@??? | Owner: no-maintainer Type: Bugs | Status: new Milestone: To Be Determined | Component: preprocessor Version: Boost 1.49.0 | Severity: Regression Resolution: | Keywords: BOOST_PP_ITERATION_FLAGS --------------------------------+------------------------------------------- Changes (by Steve Robbins <smr@???>): * cc: smr@??? (added) Comment: I am currently investigating building all Debian packages with Boost 1.49 and "luabind" fails to build with very similar symptoms. Can the boost maintainer comment whether this is a bug in boost or a simple API break. Thanks, -Steve

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Hi-Introduction
by Rhythm Gupta 13 Mar '12

13 Mar '12

Hi, I'm Rhythm Gupta. I am a first year student of Computer Science in IIT Delhi, India. I love coding and i have strong background in Maths and Science. Hence, BoostC++ looks like the perfect organisation for me. :-) Would like to apply for BoostC++ in GSoC. Could you help me get started with BoostC++?

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Boost B-Tree Library Status
by Joel 12 Mar '12

12 Mar '12

Beman et al, Is the Boost B-tree Library still on track to be proposed? The reception at BoostCON 2011 was quite warm, IIRC. http://github.com/boostcon/2011_presentations/raw/master/tue/proposed_b_tre… Activity on github seems to be dried up. https://github.com/Beman/Boost-Btree Also, how well do you think it would work with large keys and small payloads (512 byte keys, a few integers for payload). Thanks! Joel

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