September 2013 - Boost - lists.preview.boost.org

boost::polygon type genericity
by T. Raykoff 28 Oct '13

28 Oct '13

boost::polygon has a nice facility for generic numeric types for coordinate values via coordinate_traits, etc. But there are a number of places in the library code where a hard-coded type, usually a double, is used instead of referring to the appropriate type in this trait struct. Should this be considered a bug in b::p? Background: I'd like to use a custom class as a type which manages the scaling of real-world decimal coordinates to the integral values that b::p likes to use. I understand the whole thing about snap-rounding to an integral grid and all that, so need to scale up the real-world decimal values to an appropriate grid size. But it makes sense to carry this paradigm through to all of the typedef's in coordinate_traits and high_precision_type, but this is where things break with the hard-coded double's. T -- View this message in context: http://boost.2283326.n4.nabble.com/boost-polygon-type-genericity-tp4651484.… Sent from the Boost - Dev mailing list archive at Nabble.com.

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[mpl] integral_c [type_traits] integral_constant limits
by vicente.botet 21 Oct '13

21 Oct '13

Hi, I was testing Boost.Ratio with gcc-4.6 c++0x and I get some compile errors when instantiating std::cout << boost::mpl::integral_c< boost::intmax_t, boost::integer_traits<boost::intmax_t>::const_max >::value ; ..\..\..\../boost/mpl/aux_/integral_wrapper.hpp: In instantiation of 'mpl_::integral_c<long long int, 0x7fffffffffffffffll>': ratio_io\ratio_io.pass.cpp:24:6: instantiated from here ..\..\..\../boost/mpl/aux_/integral_wrapper.hpp:72:96: warning: integer overflow in expression [-Woverflow] ..\..\..\../boost/mpl/aux_/integral_wrapper.hpp:72:96: error: '-0x8000000000000000ll' is not a valid template argument for type 'long long int' because it is a non-constant expression ..\..\..\../boost/mpl/aux_/integral_wrapper.hpp:72:96: error: '-0x8000000000000000ll' is not a constant expression integral_wrapper.hpp:72 contains typedef AUX_WRAPPER_INST( BOOST_MPL_AUX_STATIC_CAST(AUX_WRAPPER_VALUE_TYPE, (value + 1)) ) next; The same line pass with gcc-4.6, gcc-4.5 and gcc-4.5 c++0x with just a warning. ..\..\..\../boost/mpl/aux_/integral_wrapper.hpp: In instantiation of 'mpl_::integral_c<long long int, 0x7fffffffffffffffll>': ratio_io\ratio_io.pass.cpp:23:6: instantiated from here ..\..\..\../boost/mpl/aux_/integral_wrapper.hpp:72:96: warning: integer overflow in expression [-Woverflow] integral_c is by integral_constant, but integral_constant doesn't needs next a prior types. This means that with the current implementation we can not use integral_constant with the max value of the type. Do you think this is a bug in integral_constant? Best, _____________________ Vicente Juan Botet Escribá http://viboes.blogspot.com/

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[predef] missing file On MacOS 10.7.5.
by Vicente J. Botet Escriba 15 Oct '13

15 Oct '13

Hi, I'm getting this error clang-darwin.compile.c++ ../../../bin.v2/libs/thread/build/clang-darwin-3.2x/debug/link-static/threading-multi/pthread/thread.o In file included from ../../../libs/thread/src/pthread/thread.cpp:33: In file included from ../../../boost/lexical_cast.hpp:156: In file included from ../../../boost/math/special_functions/sign.hpp:18: In file included from ../../../boost/math/special_functions/detail/fp_traits.hpp:27: In file included from ../../../boost/detail/endian.hpp:9: In file included from ../../../boost/predef/detail/endian_compat.h:11: ../../../boost/predef/other/endian.h:61:25: fatal error: 'sys/endian.h' file not found # include <sys/endian.h> ^ On MacOS 10.7.5. Please could this be fixed? Is there a test on the regression test using this file? Best, Vicente

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[typeof] trunk build broken
by Agustín K-ballo Bergé 12 Oct '13

12 Oct '13

Boost.TypeOf is broken as of revision #85920 due to an invalid preprocessing directive. Patch attached. Regards, -- Agustín K-ballo Bergé.- http://talesofcpp.fusionfenix.com

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How to center an element in Boost QuickBook?
by Niall Douglas 10 Oct '13

10 Oct '13

As the documentation for proposed Boost.AFIO comes together for this week's GSoC Milestone 1 (feel free to check it out at https://ci.nedprod.com/job/Boost.AFIO%20Build%20Documentation/Boost.AFIO_Doc umentation/?), a problem has emerged. We'd like a matrix table containing ticks and crosses, and building such a thing in QuickBook is easy. However, we'd also like to center the ticks and crosses in each table cell, otherwise it looks poor. Is there some way I haven't realized of aligning content in Boost QuickBook, or even BoostBook itself? The DocBook documentation suggests one can do a '''<entry align="center">'''__tick__'''</entry>''' (the triple single ticks escape from QuickBook into BoostBook). However unfortunately BoostBook defines CSS which overrides the per-cell alignment :( Thanks in advance for the help. Niall --- Opinions expressed here are my own and do not necessarily represent those of BlackBerry Inc.

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[1.55.0] Release Notes
by Daniel James 08 Oct '13

08 Oct '13

Hello, If you haven't already, can you write your release notes for 1.55? You can send them to me, or add them yourself at: http://svn.boost.org/svn/boost/website/public_html/live/feed/history/ They're on the website at: http://www.boost.org/users/history/version_1_55_0.html thanks, Daniel

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Boost result_of maintainer
by Daniel Walker 07 Oct '13

07 Oct '13

Hi all, I have been the maintainer of boost::result_of since Doug Gregor handed it over to me a few years ago, but my circumstances are changing, and I'm afraid it's time for me to hand the library over to someone else. Any volunteers? - Daniel

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[log] logger linking problem
by Tadeusz Jordan 05 Oct '13

05 Oct '13

Hi everyone, I have been using Boost for some time now and really like it. Unfortunately, recently I have bumped into a linker issue when trying to use boost::log, was wondering if anyone has seen this before, or has any insights … thank you very much. The problem is described in the below post. http://stackoverflow.com/questions/18881602/boost-logger-linking-issue -- Sincerely, Tadeusz Jordan Software Engineer at The Broad Institute of MIT and Harvard MS Candidate in CS at Northeastern University This email message and any attachments are confidential and may be privileged. It is intended only for the individual or individuals to whom it is addressed and may not be saved, copied, printed, disclosed or otherwise used by anyone else. If you are not the intended recipient, kindly notify the sender and delete this email and any attachments immediately.

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Re: [boost] [type_traits][function_types] Discard param const qualification, bug or feature?
by Sergey Zhuravlev 05 Oct '13

05 Oct '13

Signature type int(int, const std::string) can be used as parameter for some compiletime algorithm. For example, algorithm that generate new signature type with optimal transfer arguments int (int, const std::string&) or generate signature with all argument references int (int&, const std::string&) Can't use type_traits, function_types at that cases, because const be omitted. This will lead to compiletime error, if function with first signature call function with second signature and use arguments from function with first signature for this call. Signature type void(int, const std::string) can use as types tuple for some compiletime algorithm. Can't use type_traits, function_types, at that case, because const be lost. Signature type void(int, const std::string) can use as parentheses dropper for "types list", e.g. for macro parameter. (int, const std::string) => int, const std::string. Can't use type_traits, function_types, at that case, because const be lost. I think default behavior is correct, but need parameter for change this behavior. At least function_types.

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lots of warning with gcc-4.8.1 + boost-1.54.0
by Neal Becker 04 Oct '13

04 Oct '13

Lots of warnings like this: ./boost/bind/arg.hpp:37:22: warning: typedef ‘T_must_be_placeholder’ locally defined but not used [-Wunused-local-typedefs] when building 1.54.0 with gcc-4.8.1 (fedora f19)

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