November 2009 - Boost-users

[boost-users][Asio]
by Germán Diago Gómez 24 Nov '09

24 Nov '09

Hello. I'm implementing a server and a client in boost.asio, and I would like to know the differences between: - socket::send() and socket::write_some - socket::receive() and socket::read_some In the documentation, for what I read, they look like they do the same thing. Can anyone explain me the difference? Thanks.

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boost::lambda and math functions
by Peter Foelsche 24 Nov '09

24 Nov '09

I've the following template function: template<typename T> T exp2(const T T0_d) { return exp(0.5*T0_d) + 2*exp(T0_d); } I want to define this as a lambda function in place (but don't know how). It will be used with T=double and T=MyAutomaticDerivativeClass. I've already defined the return type of arithmetic operators applied to MyAutomaticDerivativeClass: namespace boost { namespace lambda { template<class Act, typename X, typename Y> struct plain_return_type_2<arithmetic_action<Act>, X, Y> { typedef ... type; }; } } What else is missing? Thanks Peter _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost

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Attempting to build Boost 1.41 on Solaris 10, Sun Studio 11 getting compilation errors
by Joy Vincent 24 Nov '09

24 Nov '09

I am attempting to compile Boost 1.41 on Solaris 10, Sun Studio 11 in 64bit. This is the error I am getting along with my build command. Any ideas? Thanks Joy ---------------------------- ./bin.solaris/bjam toolset=sun --build-dir="/mnt/scratch/jtutt/BOOST/boost_1_41_0/solaris10_64-ss11-debug" --layout=system variant=debug -q address-model=64 stdlib=sun-stlport threading=multi link=static install --without-python --without-mpi --without-graph --without-wave --without-math --libdir="/mnt/scratch/jtutt/BOOST/boost_1_41_0/solaris10_64-ss11-debug/lib" --includedir="/mnt/scratch/jtutt/BOOST/boost_1_41_0/solaris10_64-ss11-debug/include" warning: Graph library does not contain MPI-based parallel components. note: to enable them, add "using mpi ;" to your user-config.jam warning: Building Boost.Regex with the optional Unicode/ICU support disabled. note: Please refer to the Boost.Regex documentation for more information note: this is a strictly optional feature. ...patience... ...patience... ...found 16566 targets... ...updating 5532 targets... sun.compile.c++ /mnt/scratch/jtutt/BOOST/boost_1_41_0/solaris10_64-ss11-debug/boost/bin.v2/libs/serialization/build/sun/debug/address-model-64/link-static/stdlib-sun-stlport/threading-multi/basic_text_iprimitive.o CC: Warning: Option -m64 passed to ld, if ld is invoked, ignored otherwise "./boost/integer_fwd.hpp", line 70: Error: long_long_type is not a member of boost. "./boost/integer_fwd.hpp", line 70: Error: Template parameter boost::T requires a type argument. "./boost/integer_fwd.hpp", line 73: Error: ulong_long_type is not a member of boost. "./boost/integer_fwd.hpp", line 73: Error: Template parameter boost::T requires a type argument. 4 Error(s) detected. "CC" +d -library=stlport4 -g -mt -erroff=%none -m64 -DBOOST_ALL_NO_LIB=1 -I"." -c -o "/mnt/scratch/jtutt/BOOST/boost_1_41_0/solaris10_64-ss11-debug/boost/bin.v2/libs/serialization/build/sun/debug/address-model-64/link-static/stdlib-sun-stlport/threading-multi/basic_text_iprimitive.o" "libs/serialization/src/basic_text_iprimitive.cpp" ...failed sun.compile.c++ /mnt/scratch/jtutt/BOOST/boost_1_41_0/solaris10_64-ss11-debug/boost/bin.v2/libs/serialization/build/sun/debug/address-model-64/link-static/stdlib-sun-stlport/threading-multi/basic_text_iprimitive.o... ...failed updating 1 target... $

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How to skip leading characters
by Al Gambardella 24 Nov '09

24 Nov '09

I have an input text file that I read line by line into a standard string. Each line has the following format: Name1 00 12 3a 4c ff … Name2 33 55 5c dd ee … How do create the grammer to skip the leading NameX on each line and put the hex digits into a vector? If the lines had a more complex format such that anything could appear before NameX for example: Bla bla bla : 0a .bb cc NameX 01 22 aa dd 33 44 50 00 … How could I once again get the hex digits after the name into a vector?

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Re: [Boost-users] [ASIO] Timer question
by Bjarne Laursen 24 Nov '09

24 Nov '09

Yes, I would say its broken. But it is a matter of defintion. I asked about this in an earlier thread. I created some code to fix it. See https://svn.boost.org/trac/boost/ticket/3504 -Bjarne

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Re: [Boost-users] issues when trying to link with boost_datetime
by Igor R 23 Nov '09

23 Nov '09

> I’m trying to link on windows with boost_date time. > > The build can not find the file: > > 'libboost_date_time-vc90-mt-s-1_41.lib' > > This file does not exist. > > Any one know what the problem is? If the file doesn't exist on your hard-disk, maybe you didn't build this lib? Build it with bjam, like this: bjam variant=release link=static runtime-link=static threading=multi --with-date_time stage (the toolset will be choosen automatically, or specify it explicitly)

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how to use input_filter to read data from a file?
by eial＠cs.bgu.ac.il 23 Nov '09

23 Nov '09

hello all. I have a code that gets a line, encodes it in base64 and save it to a file and another part that opens the same file inorder to read the data, for some reason, the get function at line 99 returns an empty string. how can I solve this problem? complete code can be found at http://pastebin.com/f62d2fbf5 thanks

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Re: [Boost-users] issues when trying to link with boost_datetime
by Paul A. Bristow 23 Nov '09

23 Nov '09

From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Sean Farrow Sent: Monday, November 23, 2009 6:05 PM To: boost-users(a)lists.boost.org Subject: [Boost-users] issues when trying to link with boost_datetime Importance: High Hi: I'm trying to link on windows with boost_date time. The build can not find the file: 'libboost_date_time-vc90-mt-s-1_41.lib' This file does not exist. Any one know what the problem is? Maybe 1 You haven't built the library, for example, to somewhere /lib/stage. For me it's I:\boost_1_41_0\stage\lib. Check there first? 2 You haven't added the path to the libraries in Tools options, VC directories, library, browse to find the \lib 3 You haven't built the static library(s) - the simple build library doesn't do this - and doesn't warn you (to be corrected soon). HTH Paul

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issues when trying to link with boost_datetime
by Sean Farrow 23 Nov '09

23 Nov '09

Hi: I'm trying to link on windows with boost_date time. The build can not find the file: 'libboost_date_time-vc90-mt-s-1_41.lib' This file does not exist. Any one know what the problem is? Chers Sean.

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[Review] GGL review starts today, November 5th
by Hartmut Kaiser 23 Nov '09

23 Nov '09

Hi all, The formal review of the Generic Geometry Library (GGL) starts today, November 5, 2009 and will finish November 15, 2009. GGL is being developed by Barend Gehrels, Bruno Lalande and Mateusz Loskot, with substantial input from this Boost mailing list. ------------------------------------------------ About the library: GGL defines concepts for geometries and implements some algorithms on such geometries. GGL is header-only, and can be applied in all software where geometry plays a small or a larger role. Users of the library can use just only one function, such as distance: int a[2] = {1,1}; int b[2] = {2,3}; double d = ggl::distance(a, b); Library users can also use the library in combination with std::vector, boost::tuple's and boost::ranges, such as: std::vector<boost::tuple<double, double, double> > line; line.push_back(boost::make_tuple(1, 2, 3)); line.push_back(boost::make_tuple(4, 5, 6)); line.push_back(boost::make_tuple(7, 8, 9)); double length = ggl::length(line); GGL can also be used in combination with custom or legacy geometries, adapting them to the library specializing traits classes or using registration macro's. Formally, GGL contains a dimension-agnostic, coordinate-system-agnostic and scalable kernel, based on concepts, meta-functions and tag-dispatching. On top of that kernel, algorithms are built: area, length, perimeter, centroid, convex hull, intersection (clipping), within (point in polygon), distance, envelope (bounding box), simplify, transform, convert, and more. The library is also designed to support high precision arithmetic numbers, such as GMP. The GGL might be used in all domains where geometry plays a role: mapping and GIS, gaming, computer graphics and widgets, robotics, astronomy... The core is designed to be as generic as possible and support those domains. However, for now the development has been mostly GIS-oriented. The GGL team proposes an extension model, very similar to what is used by GIL. The proposal as it is in the Boost Sandbox included three extensions: - SVG because it is used in the samples and to generate the documentation - WKT because it is used in the tests - The geographic coordinate system because it is used in some of the examples, also showing how other coordinate systems can be implemented There are more extensions, not included now, a.o.: - Spatial index - Map projections The proposed GGL has seen four previews, many discussions and many changes in design and implementation, based on those discussions. Previews were published on this list January '08, March'08, October'08 and February'09. GGL can be found in the sandbox https://svn.boost.org/svn/boost/sandbox/ggl/formal_review, including source code, examples, unit tests and documentation. Documentation can also be found online: http://geometrylibrary.geodan.nl/formal_review ------------------------------------------------------- Everybody on this list is invited to participate in this formal review. I hope to see your review of this library, including your vote, and I welcome your participation in the discussions on the Boost mailing list. Please always state in your review, whether you think the library should be accepted as a Boost library. Additionally, please consider giving feedback on the following general topics: - What is your evaluation of the design? - What is your evaluation of the implementation? - What is your evaluation of the documentation? - What is your evaluation of the potential usefulness of the library? - Did you try to use the library? With what compiler? Did you have any problems? - How much effort did you put into your evaluation? A glance? A quick reading? In-depth study? - Are you knowledgeable about the problem domain? Regards Hartmut Review Manager ------------------- Meet me at BoostCon http://boostcon.com

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