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[1.35.0] Release Candidate 3 available
by Beman Dawes 31 Mar '08

31 Mar '08

See http://boost.cowic.de/rc/ For this release candidate the naming is exactly the same as it will be in the final release. Unless a showstopper emerges, these exact files will become the final release. Before declaring the release done, we need to verify that none of the four package files is corrupt and installs without error. I'm starting to do that now. I encourage others to also look for showstoppers, and report results on the developer or user lists. If no showstoppers surface by 9 AM tomorrow morning, US Eastern time, I'll declare 1.35.0 done, create the tag, and push the files out to Sourceforge. --Beman

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Compile error boost 1.35.0 on Solaris 10/x64 Studio 12
by Anders Moe 31 Mar '08

31 Mar '08

Hi all I'm getting the following error in boost 1.35.0 on Solaris 10 using Sun Studio 12 : "/home/amoe/src/boost_1_35_0/boost/format/alt_sstream_impl.hpp", line 252: Error: Cannot assign void* to char*. Where: While instantiating "boost::io::basic_altstringbuf, std::allocator>::overflow(int)". Where: Instantiated from non-template code.1 Error(s) detected. I'd like to track down which part of my own code initiates the error, but frankly I'm not sure how to do that - the compiler output reports nothing but the above error. These are the relevant lines from alt_sstream_impl.hpp : add_size) { new_size += add_size; newptr = alloc_.allocate(new_size, is_allocated_? oldptr : 0); // ERROR } Regards, Anders

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query for Boost support
by rishi keisham 31 Mar '08

31 Mar '08

Hi all, I have read the Boost supported platforms on the Boost website. I am kind of interested in knowing possibilities for Boost on more platforms. Will it be able to build the boost C++ library on MontaVista linux.. At present I am working on "mipsel-linux-g++ compiler". Thanks in advance. Thanks, Keisham --------------------------------- 5, 50, 500, 5000 - Store N number of mails in your inbox. Click here.

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Defining Macro's using bjam or "config/user.hpp".
by Stephen Hewitt 31 Mar '08

31 Mar '08

I have just downloaded Boost 1.35.0 for use with MSVC9 (Microsoft Visual Studio 9.0). As some of you may be aware, Microsoft has added some features which are a little troublesome to work around with Boost. They are controlled by the following macros (and perhaps others I've missed): - _CRT_SECURE_NO_WARNINGS - _SCL_SECURE_NO_WARNINGS - _SECURE_SCL I must say, I find building Boost a pain at the best of times, but I can't seem to find a way to define these macros on bjam's command line. Putting the changes in "boost/config/user.hpp" doesn't work and errors like the following result: basic_iserializer.cpp .\boost/config/user.hpp(128) : warning C4005: '_SECURE_SCL' : macro redefinition C:\Program Files\Microsoft Visual Studio 9.0\VC\INCLUDE\yvals.h(124) : see previous definition of '_SECURE_SCL' The reason is in this instance is that "basic_iserializer.cpp" contains the following at the top: #include <cassert> #include <cstdlib> // NULL #include <boost/config.hpp> Note that <cassert> is included before <boost/config.hpp>: it's already too late then as including <cassert> results in the macros being defined. I have searched the web and found many "solutions", but I couldn't get any of them to work. Any help would be much appreciated. Steve

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backwards compatibility
by Steve M. Robbins 31 Mar '08

31 Mar '08

Hello, I realize that Boost doesn't promise ABI compatibility across releases, nor even API compatibility according to the FAQ: How can the Boost libraries be used successfully for important projects? Many of the Boost libraries are actively maintained and improved, so **backward compatibility with prior version isn't always possible**. Deal with this by freezing the version of the Boost libraries used by your project. Only upgrade at points in your project's life cycle where a bit of change will not cause problems. Individual bug fixes can always be obtained from the boost repository. (emphasis mine) OK, but *in practice* is there a large amount of work adapting existing client code to a new release? I'm asking in order to gauge whether it is useful for a linux distribution (Debian) to keep multiple versions of Boost available simultaneously; e.g. 1.34.1 and 1.35. Currently Debian provides only the latest version of Boost. Thanks, -Steve

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Solaris SunStudio unsupported [intrusive problems]?
by Zeljko Vrba 31 Mar '08

31 Mar '08

Why has the SunCC support been dropped from Boost 1.35? (In particular, intrusive containers are not usable, for example.)

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Egg Review starts today March 31st
by dan marsden 31 Mar '08

31 Mar '08

The review of the Egg library by Shunsuke Sogame starts today.The library is concerned with the implementation and adaptation of function objects. As function objects are everywhere in Boost and C++, I hope to see plenty of discussion and votes during the review. Introduction: It is not so easy to define Function Objects especially if you want to support Boost.ResultOf and Boost.Lambda. Therefore, as Boost provides iterator_facade and iterator adaptors, Egg provides function_facade and function adaptors. Egg provides the following features: * Workaround for the Forwarding Problem http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2002/n1385.htm * Helpers to build Function Objects: * egg::function and egg::function_facade provides the way to build Function Objects which supports Boost.ResultOf and Lambda. * Function Objects Adaptors(in other words, higher-order functions): * egg::curryN supports the currying. * egg::pipable emulates extension methods(C#). * egg::fuse/unfuse emulates variadic functions. * egg::nestN represents nested lambda expressions. * etc... The documentation is on line: http://p-stade.sourceforge.net/boost/libs/egg/ The zipped source code is in Vault/FunctionObjects: http://tinyurl.com/34lgda Tested under: Boost Development Trunk and Boost Version1.34.1. --------------------------------------------------- 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? Thanks Dan Marsden Review Manager ___________________________________________________________ Yahoo! For Good helps you make a difference http://uk.promotions.yahoo.com/forgood/

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matlab & boost
by elviin 31 Mar '08

31 Mar '08

Hi, I have found that Matlab uses Boost libraries and maybe headers also. It's surprising since people often compare their legacy Matlab code and new C++ boostified code. There is no reference from Mathworks on "Who's using Boost". boost_date_time-vc80-mt-1_33_1.dll boost_filesystem-vc80-mt-1_33_1.dll boost_regex-vc80-mt-1_33_1.dll boost_serialization-vc80-mt-1_33_1.dll boost_signals-vc80-mt-1_33_1.dll boost_thread-vc80-mt-1_33_1.dll boost_wserialization-vc80-mt-1_33_1.dll See the directory MATLAB\R2007b\bin\win64. Elviin

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Boost 1.35.0 released
by Beman Dawes 31 Mar '08

31 Mar '08

Boost is pleased to announce the availability of release 1.35.0. This is a major release that includes 12 new libraries, and coincides with an upgrade and reorganization of the www.boost.org web site. The new libraries are: * Asio: Portable networking, including sockets, timers, hostname resolution and socket iostreams, from Chris Kohlhoff. * Bimap: Boost.Bimap is a bidirectional maps library for C++. With Boost.Bimap you can create associative containers in which both types can be used as key, from Matias Capeletto. * Circular Buffer: STL compliant container also known as ring or cyclic buffer, from Jan Gaspar. * Function Types: Boost.FunctionTypes provides functionality to classify, decompose and synthesize function, function pointer, function reference and pointer to member types. From Tobias Schwinger. * Fusion: Library for working with tuples, including various containers, algorithms, etc. From Joel de Guzman, Dan Marsden and Tobias Schwinger. * GIL: Generic Image Library, from Lubomir Bourdev and Hailin Jin. * Interprocess: Shared memory, memory mapped files, process-shared mutexes, condition variables, containers and allocators, from Ion Gaztañaga. * Intrusive: Intrusive containers and algorithms, from Ion Gaztañaga. * Math/Special Functions: A wide selection of mathematical special functions from John Maddock, Paul Bristow, Hubert Holin and Xiaogang Zhang. * Math/Statistical Distributions: A wide selection of univariate statistical distributions and functions that operate on them from John Maddock and Paul Bristow. * MPI: Message Passing Interface library, for use in distributed-memory parallel application programming, from Douglas Gregor and Matthias Troyer. * System: Operating system support, including the diagnostics support that will be part of the C++0x standard library, from Beman Dawes. Among existing libraries, Boost.Threads has been upgraded to reflect changes made by the C++ committee in the process of including Boost.Threads in C++0x. Dozens of people contribute to each Boost release. Rene Rivera, Daniel James, and John Maddock were instrumental in readying this release. It wouldn't have happened without them. --Beman Dawes, Release Manager

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Gzip filters with concatenated buffers
by David White 30 Mar '08

30 Mar '08

Hi everyone, I'm using gzip_decompressor in a manner similar to the example program found at the bottom of http://boost.org/doc/libs/1_35_0/libs/iostreams/doc/classes/gzip.html . It mostly works well, however there is a feature of the standard Unix gzip(1) program that it doesn't seem to emulate: gzip allows one to concatenate gzipped files together, and when one uncompresses the resulting file it will be identical to if the two uncompressed files had been concatenated. That is to say, one can do this: $ echo "abc" > a $ echo "def" > b $ gzip a $ gzip b $ cat a.gz b.gz > c.gz $ gunzip -c c.gz abc def $ However, using this Boost code: ifstream file("c.gz", ios_base::in | ios_base::binary); filtering_streambuf<input> in; in.push(gzip_decompressor()); in.push(file); boost::iostreams::copy(in, cout); Will result only in the first line, "abc" being output. Is there any easy way to emulate the behavior of gzip(1) in this regard? Any help is appreciated. David

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