July 2012 - Boost - lists.preview.boost.org

[1.50.0] PDF documentation available
by John Maddock 15 Jul '12

15 Jul '12

With apologies for being so late with these.... The PDF build of Boost's documentation for 1.50 is available from the usual SF site: https://sourceforge.net/projects/boost/files/boost-docs/1.50/ John.

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[atomic] trunk doesn't build with VC++
by Luke Elliott 14 Jul '12

14 Jul '12

compile-c-c++ ..\..\..\bin.v2\libs\atomic\build\msvc-9.0\debug\threading-multi\lockpool.obj lockpool.cpp D:\dev\checkouts\boost-trunk\boost/atomic/detail/interlocked.hpp(125) : error C2039: 'platform_cmpxchg32' : is not a member of 'boost::atomics::detail' D:\dev\checkouts\boost-trunk\boost/atomic/detail/interlocked.hpp(125) : error C3861: 'platform_cmpxchg32': identifier not found D:\dev\checkouts\boost-trunk\boost/atomic/detail/interlocked.hpp(127) : warning C4800: 'boost::uint32_t' : forcing value to bool 'true' or 'false' (performance warning) Should it be using platform_cmpxchg32_strong at line 125 of interlocked.hpp? And return (0 != expected) (or something) on line 127 to clean up the warning? Best regards Luke Elliott.

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Clang Darwin trunk Cray 8.0 and max_digits10 support - problem in config?
by Paul A. Bristow 14 Jul '12

14 Jul '12

I note that the test of ztest_max_digits10 and zztest_max_digits10 in http://www.boost.org/development/tests/trunk/developer/math.html both fail for these platforms. ztest_max_digits10 tests of native std::numeric_limits<>::max_digits10 is supported. zztest_max_digits10 test if BOOST_NO_NUMERIC_LIMITS_LOWEST is a proxy to signal support. where using std::numeric_limits<>::max_digits10 should be possible using BOOST_NO_NUMERIC_LIMITS_LOWEST as a proxy for Clang the messages are In file included from ../libs/math/test/zztest_max_digits10.cpp:27: In file included from ../boost/config.hpp:40: ../boost/config/select_stdlib_config.hpp:18:12: fatal error: 'cstddef' file not found # include <cstddef> In file included from ../libs/math/test/ztest_max_digits10.cpp:27: In file included from ../boost/config.hpp:40: ../boost/config/select_stdlib_config.hpp:18:12: fatal error: 'cstddef' file not found or for Cray CC-1353 crayc++: INTERNAL File = /opt/gcc/4.4.4/snos/include/g++/bits/move.h, Line = 34 CIF Error #include <cstddef> ^ This appears to be a problem in the config - a missing include. Suggestions? Paul --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow(a)hetp.u-net.com

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[asio] boost::asio::read with empty input vector leads to an infinite loop
by Michael Kochetkov 13 Jul '12

13 Jul '12

Hello, In the code bellow I have forgotten to set the input vector (request) size. Is the code really supposed to react as an infinite loop (no errors, length is always 0, boost::asio::read returns immediately) or such behavior is a defect? for (;;) { std::vector<uint8_t> request; boost::system::error_code error; size_t length = boost::asio::read(sock, boost::asio::buffer(request), error); if (error == boost::asio::error::eof) break; else if (error) throw my_exception(L"Socket error"); ... } Thank you in advance, -- Michael Kochetkov

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[filesystem] 1.49 linking with c++0x
by Daniel Larimer 13 Jul '12

13 Jul '12

Given: // cp.cpp #include <boost/filesystem.hpp> int main( int argc, char** argv ) { if( argc < 3 ) return -1; boost::filesystem::copy_file( argv[1], argv[2] ); return 0; } g++ -o cp cp.cpp -std=c++0x -I /usr/local/include /usr/local/lib/libboost_filesystem.a /usr/local/lib/libboost_system.a Undefined symbols for architecture x86_64: "boost::filesystem3::detail::copy_file(boost::filesystem3::path const&, boost::filesystem3::path const&, boost::filesystem3::copy_option, boost::system::error_code*)", referenced from: boost::filesystem3::copy_file(boost::filesystem3::path const&, boost::filesystem3::path const&) in ccUAyvBD.o ld: symbol(s) not found for architecture x86_64 collect2: error: ld returned 1 exit status If I remove the -std=c++0x flag then it links just fine. g++ --version g++ (MacPorts gcc47 4.7.0_3) 4.7.0 Copyright (C) 2012 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. Dan

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Boost.config limits_test testcase and qnan checks.
by Matthew Markland 13 Jul '12

13 Jul '12

First an introduction; my name is Matt Markland and I support the Cray Compiling Environment (CCE) C/C++ compiler for Cray, Inc. We (Cray) are in the process of improving our Boost support and currently have an intern doing some work for us on this path. While working on Boost.config, he has run into a testcase failure with the limits_test function test_float_limits(). With default options, CCE fails the qnan tests due to the fact that we do not conform to the IEEE specification. CCE is a little different here in that by default it runs at a higher optimization level then other compilers. Gcc will fail this portion of the test if you compile with optimization on and -ffast-math. My question is whether it is valid to test the qnan behavior when a platform does not claim compliance? It seems to me that these checks should be wrapped in an is_iec559 check. Thoughts? Thanks for your time! Matt ---- Matthew Markland Compiler Front-End and Libraries C/C++ Front-End markland(a)cray.com 651-605-9186

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Update request to Boost Discussion Policy maintainers
by Mateusz Loskot 13 Jul '12

13 Jul '12

Folks, May I request to update the "Effective Posting" section of the policy at: http://www.boost.org/community/policy.html#effective adding the following new sub-section as first: """ Use Sensible Subject Please make sure that your postings have a meaningful subject line that is related to the contents of your mail. Many people use this to help determine which posts to read and which to ignore when they're operating under time constraints. """ Best regards, -- Mateusz Loskot, http://mateusz.loskot.net

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Review Wizard Status Report for July 2012
by Ronald Garcia 13 Jul '12

13 Jul '12

============================================== Review Wizard Status Report for July 2012 ============================================== News ==== 1. Multiprecision Arithmetic Reviewed 2. Boost 1.50.0 Released. New Libraries: 1) Algorithm 2) Functional/OverloadedFunction 3) LocalFunction 4) Utility/IdentityType Open Issues =========== The following libraries have been reviewed and await reports from their review managers: * Conversion - reviewed August 2011; review manager: Gordon Woodhull. * Predef - reviewed February 2012; review manager: Joel Falcou. * Multiprecision - reviewed June 2012; review manager: Jeffrey Hellrung The following libraries have been accepted to Boost, but have not yet been submitted to SVN: * Constrained Value - accepted September 2010; author: Robert Kawulak. * GIL.IO - accepted January 2011; author: Christian Henning. The following libraries have been accepted and submitted to SVN, but have not yet appeared in a release: * Atomic - accepted July 2011; author Helge Bahmann. * Type Traits Introspection - accepted August 2011; author: Edward Diener. * Lockfree - accepted August 2011; author: Tim Blechmann. * Context - accepted January 2012; author: Oliver Kowalke. The following libraries have been accepted provisionally to Boost, but have not been submitted for mini-review and full acceptance: * Endian - accepted provisionally November 2011; author: Beman Dawes. * Log - accepted provisionally March 2010; author: Andrey Semashev. General Announcements ===================== As always, we need experienced review managers. Please take a look at the list of libraries in need of managers and check out their descriptions. In general review managers are active boost participants, including library contributors, infrastructure contributors, and other mailing list participants with a substantial track record of constructive participation. If you can serve as review manager for any of them, email Ron Garcia or John Phillips, "rxg at cs dot cmu dot edu" and "phillips at pacific dot mps dot ohio-state dot edu" respectively. We are also suffering from a lack of reviewers. While we all understand time pressures and the need to complete paying work, the strength of Boost is based on the detailed and informed reviews submitted by you. If you are interested in reviewing a library but won't have time during the review period, you can always prepare your review ahead of time. No rule says you can only work on a review during the review period. A link to this report will be posted to www.boost.org. If you would like us to make any modifications or additions to this report before we do that, please email Ron or John. The review schedule is an unordered list of the libraries awaiting review. As such, any library on the schedule can be reviewed once the developer is ready, a review manager has been secured, and the manager, developer, and wizards agree on a date to schedule the review. Review Schedule =============== * Join (M) * Pimpl (M) * Sorting (M) * Quaternions, Vectors, Matrices (M) * Variadic Macro Data (M) * Block Pointer (M) * Singularity (M) * Extended Complex Numbers (M) * Metaparse (M) * Polygon: Voronoi Extensions * Coroutine * Type Erasure * Range Extensions * Contract * Nowide (M) * ODEint (M) ``(M)`` marks libraries that need review managers. -------------------- Join ---- :Author: Yigong Liu :Review Manager: Needed :Download: http://channel.sourceforge.net/ :Description: Join is an asynchronous, message based C++ concurrency library based on join calculus. It is applicable both to multi-threaded applications and to the orchestration of asynchronous, event-based applications. It follows Comega's design and implementation and builds with Boost facilities. It provides a high level concurrency API with asynchronous methods, synchronous methods, and chords which are "join-patterns" defining the synchronization, asynchrony, and concurrency. Pimpl ----- :Author: Vladimir Batov :Review Manager: Needed :Download: https://github.com/boost-vault/Miscellaneous/blob/master/Pimpl.zip :Description: The Pimpl idiom is a simple yet robust technique to minimize coupling via the separation of interface and implementation and then implementation hiding. This library provides a convenient yet flexible and generic deployment technique for the Pimpl idiom. It's seemingly complete and broadly applicable, yet minimal, simple and pleasant to use. Sorting ------- :Author: Steven Ross :Review Manager: Needed :Download: https://github.com/boost-vault/Sorting :Description: A grouping of 3 templated hybrid radix/comparison-based sorting algorithms that provide superior worst-case and average-case performance to std::sort: integer_sort, which sorts fixed-size data types that support a rightshift (default of >>) and a comparison (default of <) operator. float_sort, which sorts standard floating-point numbers by safely casting them to integers. string_sort, which sorts variable-length data types, and is optimized for 8-bit character strings. All 3 algorithms have O(n(k/s + s)) runtime where k is the number of bits in the data type and s is a constant, and limited memory overhead (in the kB for realistic inputs). In testing, integer_sort varies from 35% faster to 2X as fast as std::sort, depending on processor, compiler optimizations, and data distribution. float_sort is roughly 70% faster than std::sort. string_sort is roughly 2X as fast as std::sort. Quaternions, Vectors, Matrices ------------------------------ :Author: Emil Dotchevski :Review Manager: Needed :Download: http://www.revergestudios.com/boost-qvm/ :Description: QVM defines a set of generic functions and operator overloads for working with quaternions, vectors and matrices of static size. The library also defines vector and matrix data types, however it allows users to introduce their own types by specializing the q_traits, v_traits and m_traits templates. Variadic Macro Data ------------------- :Author: Edward Diener :Review Manager: Needed :Download: `Boost Sandbox <http://svn.boost.org/svn/boost/sandbox/variadic_macro_data/>`__ :Description: This library adds support and functionality for variadic macros to Boost as well as integrating variadic macros with the Boost PP library without changing the latter library in any way. Block Pointer ------------- :Author: Phil Bouchard :Review Manager: Needed :Download: https://svn.boost.org/svn/boost/sandbox/block_ptr/ :Description: Deterministic memory manager of constant complexity capable of handling cyclic collections. Singularity ----------- :Author: Ben Robinson :Review Manager: Needed :Download: https://github.com/cppmaven/Singularity :Description: The Singularity Design Pattern allows you to restrict any class to a single instance. Unlike the infamous Singleton, Singularity gives you direct control over the lifetime of the object, does not require you to grant global access to the object, nor does it limit you to the default constructor for that object. Extended Complex Numbers ------------------------ :Author: Matthieu Schaller :Review Manager: Needed :Download: http://code.google.com/p/cpp-imaginary-numbers/ :Description: The library is an extension of the std::complex class addressing two issues: 1. The standard does not guaranty the behaviour of the complex class if instantiated with types other than float/double/long double. 2. Some calculation where pure imaginary numbers (i.e. multiples of sqrt(-1)) appear are unnecessarily slowed down due to the lack of support for these numbers. The code I submit contains two interleaved classes boost::complex and boost::imaginary which can be instantiated with any type T provided T overloads the usual arithmetic operators and some basic (real) mathematical functions depending on which complex function will be used. It is thus an extended version of Thorsten Ottosen's n1869 proposal (http://www.open-std.org/JTC1/SC22/WG21/docs/papers/2005/n1869.html) Metaparse --------- :Author: Abel Sinkovics :Review Manager: Needed :Download: http://abel.web.elte.hu/metaparse/metaparse.zip :Description: Metaparse is a library for constructing parsers parsing at compile-time based on template metaprogramming. The parsers built with the library take boost::mpl::strings as input and can produce - types - objects (types with public static members) - callable C++ functions (types with public static method) - template metafunction classes as output (based on the input being parsed). On compilers supporting constexpr the library provides the following syntactic sugar for writing the input of the parsers: BOOST_STRING("this is a string") The library can be used for implementing DSLs in C++, including DSLs making C++ template metaprogramming easier (see examples). Polygon: Voronoi Extensions --------------------------- :Author: Andril Sydorchuk :Review Manager: Lucanus Simonson :Download: http://svn.boost.org/svn/boost/sandbox/gtl/ :Description: This library extends Boost.Polygon with the following features: - Robust and efficient implementation of the sweepline algorithm that allows to construct Voronoi diagram, Delaunay triangulation and medial axis of a set of points and line segments. - Coordinates of the output geometries are computed within the 64 machine epsilon relative error (6 mantissa bits). - Voronoi diagram data structure that allows efficient traversal and data association with the output Voronoi graph. - No 3rd party dependencies (e.g. GMP, MPFR), all the required multiple precision types are implemented as part of the library. - The input and output coordinate type domains are configurable via coordinate type traits, thus allowing to compute coordinates of the Voronoi vertices within any required precision. - The full construction of the Voronoi diagram of 100 000 points takes only 0.27 seconds (see benchmarks). Coroutine --------- :Author: Oliver Kowalke :Review Manager: Hartmut Kaiser :Download: http://gitorious.org/boost-dev/boost-dev/archive-tarball/coroutine :Description: This library is an implementation of coroutines and generators using Boost.Context. Type Erasure ------------ :Author: Steven Watanabe :Review Manager: Lorenzo Caminiti :Download: http://sourceforge.net/projects/steven-watanabe.u/files/ :Description: The TypeErasure library is a generalization of boost::any and boost::function. It allows easy composition of arbitrary type erased operators. Range Extensions ---------------- :Author: Akira Takahashi :Review Manager: Neil Groves :Download: https://github.com/faithandbrave/OvenToBoost :Description: This project adds some features of the Oven Range Library to Boost.Range. Features: - Additional Range Adaptors (taken, taken_while, dropped, dropped_while, elements, elements_key, memoized, outdirected) - Extensions for using Lambda (regular function, regular operator) - Infinite Range (iteration function) - and additional range utilities. Contract -------- :Author: Lorenzo Caminiti :Review Manager: Dave Abrahams :Download: http://sourceforge.net/projects/contractpp/files/latest/download :Description: This library implements Contract Programming for the C++ programming language (see the end of this email). In addition, the library implements virtual specifiers (final, override, and new, see C++11), concept checking, and named parameters. This library is implemented for the C++03 standard and it does not require C++11. Nowide ------ :Author: Artyom Beilis :Review Manager: Needed :Download: http://cppcms.com/files/nowide/ :Description: This library makes cross platform Unicode aware programming easier. It provides an implementation of standard C and C++ library functions, such that their inputs are UTF-8 aware on Windows without requiring to use Wide API. ODEint ------ :Author: Karsten Ahnert and Mario Mulansky :Review Manager: Needed :Download: https://github.com/headmyshoulder/odeint-v2 :Description: odeint provides routines for numerically solving Ordinary Differential Equations, a task heavily required when approaching scientific problems numerically. In odeint we have implemented the most common algorithms in a modern, generic way which provides several advantages over existing implementations. The main focus of odeint is to separate algorithms from the underlying basic computation unit. This allows for example to easily use the power of modern GPUs via CUDA or OpenCL to speed up computational heavy simulations. Libraries under development =========================== See http://svn.boost.org/trac/boost/wiki/LibrariesUnderConstruction for a current listing of libraries under development.

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[interprocess] named_condition compile failure...
by Joseph Van Riper 13 Jul '12

13 Jul '12

I have either not understood the documentation, or found a bug in Boost.Interprocess's named_condition class. If I'm in error, I hope someone can help me. Otherwise, I will need to approach my needs another way. I assume that named_condition requires a named_mutex, as the documentation states in the Description here: http://www.boost.org/doc/libs/1_50_0/doc/html/boost/interprocess/named_cond… "This condition variable is designed to work with named_mutex<http://www.boost.org/doc/libs/1_50_0/doc/html/boost/interprocess/named_mute…> and can't be placed in shared memory or memory mapped files." Unfortunately, at least on a VC++ 2010 compiler, this doesn't seem to compile for me. I am using the following test code: #include "stdafx.h" #include <boost/interprocess/sync/named_condition.hpp> #include <boost/interprocess/sync/named_mutex.hpp> int _tmain(int argc, _TCHAR* argv[]) { boost::interprocess::named_mutex mutex( boost::interprocess::open_or_create, "test" ); boost::interprocess::named_condition condition( boost::interprocess::open_or_create, "test" ); condition.wait( mutex ); return 0; } With this code, I get the following error: 1>c:\code\sdks\boost\include\boost-1_50\boost\interprocess\sync\shm\named_condition.hpp(204): error C2248: 'boost::interprocess::interprocess_mutex::mutex' : cannot access private member declared in class 'boost::interprocess::interprocess_mutex' 1> c:\code\sdks\boost\include\boost-1_50\boost\interprocess\sync\interprocess_mutex.hpp(117) : see declaration of 'boost::interprocess::interprocess_mutex::mutex' 1> c:\code\sdks\boost\include\boost-1_50\boost\interprocess\sync\interprocess_mutex.hpp(67) : see declaration of 'boost::interprocess::interprocess_mutex' 1> c:\code\sdks\boost\include\boost-1_50\boost\interprocess\sync\shm\named_condition.hpp(204) : while compiling class template member function 'boost::interprocess::ipcdetail::shm_named_condition::lock_wrapper<Lock>::mutex_type *boost::interprocess::ipcdetail::shm_named_condition::lock_wrapper<Lock>::mutex(void) const' 1> with 1> [ 1> Lock=boost::interprocess::named_mutex 1> ] 1> c:\code\sdks\boost\include\boost-1_50\boost\interprocess\sync\shm\named_condition.hpp(342) : see reference to class template instantiation 'boost::interprocess::ipcdetail::shm_named_condition::lock_wrapper<Lock>' being compiled 1> with 1> [ 1> Lock=boost::interprocess::named_mutex 1> ] 1> c:\code\sdks\boost\include\boost-1_50\boost\interprocess\sync\named_condition.hpp(156) : see reference to function template instantiation 'void boost::interprocess::ipcdetail::shm_named_condition::wait<L>(L &)' being compiled 1> with 1> [ 1> L=boost::interprocess::named_mutex 1> ] 1> c:\code\projects\testinterprocess\testinterprocess\testinterprocess.cpp(10) : see reference to function template instantiation 'void boost::interprocess::named_condition::wait<boost::interprocess::named_mutex>(L &)' being compiled 1> with 1> [ 1> L=boost::interprocess::named_mutex 1> ] 1>c:\code\sdks\boost\include\boost-1_50\boost\interprocess\sync\shm\named_condition.hpp(204): error C2064: term does not evaluate to a function taking 0 arguments - Trey

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[1.50] Beta build of the PDF docs
by John Maddock 13 Jul '12

13 Jul '12

A PDF build of the 1.50(beta) docs is here: https://sourceforge.net/projects/boost/files/boost-docs/1.50/ Please let me know if there are any issues, John.

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