August 2011 - Boost-users - lists.preview.boost.org

[Regex | Xpressive] Efficiently "grepping" large files
by Thomas Luzat 17 Aug '11

17 Aug '11

Hello, I am looking into Boost.Regex and Boost.Xpressive for implementing grep-like functionality on large files. More specifically I want to check whether a file contains a match for an expression which does not need that much context (a few KB). regex_search and BidirectionalIterators for the whole file work, but there is a complication: I want to do other operations on the file in other threads in parallel (such as calculating hashes and extracting other data). Given that this is … [View More]

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cross-compiling didn't work with boost:filesystem
by rudy b 17 Aug '11

17 Aug '11

Hi, I developed a code on Linux, and the only library that I used was boost:filesystem. I was very happy with the code on Linux, and it never gave me a problem and never broke on me, I tried it on different scenarios and different file types, and I had never issue with boost::filesystem::remove(&path) function. But, now, I needed my code on a Mac machine (but I don't have a Mac) so I borrowed my friend's Mac, and installed xcode, and installed boost_1.47, and I didn't get a single error or … [View More]

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[Containers Library Review] The review of the Containers library by Ion Gaztanaga starts today
by John Maddock 17 Aug '11

17 Aug '11

The review of the containers library by Ion Gaztanaga starts today, to summarize the library: "Boost.Container library implements several well-known containers, including STL containers. The aim of the library is to offers advanced features not present in standard containers or to offer the latest standard draft features for compilers that comply with C++03. In short, what does Boost.Container offer? * Move semantics are implemented, including move emulation for pre-C++0x compilers. … [View More]

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ublas bug?
by Peter Man 17 Aug '11

17 Aug '11

Hi, I was just wondering if there is a bug in ublas (boost version 1.47): when I use the following code (in debug mode): ublas::matrix<double> m; ublas::matrix<double> m2; m2 = m; this compiles in MSVC 10, but produces a runtime error "Expression: invalid null pointer". I had a look at some of the underlying ublas code, and found that default initialisation of matrices makes the underlying data pointer "data_" be set to NULL, and that when one matrix is copied to another, std:… [View More]

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Simple inclusion of (1.47.0) filesystem.hpp generates compiler errors.
by Bill Moo 17 Aug '11

17 Aug '11

Hello Users, Qt v4.7.2 Boost v1.47.0. Intel Compiler v 12.0.1029.2010 Windows 7 Ultimate N x64 Building an x64 Release binary I have just included the boost/filesystem.hpp file in to my application and re-compiled only for the compiler to generate these errors. As yet I am not using any of the functionality of this I just included the file. Is this another Intel / MSVC STL issue? Sorry for the dump but without it I assume you won't be able to help. ..\Includes\boost/filesystem/v3/… [View More]operations.hpp(126): error: expected either a definition or a tag name BOOST_SCOPED_ENUM_START(copy_option) ^ ..\Includes\boost/filesystem/v3/operations.hpp(127): error: expected an identifier {none, fail_if_exists = none, overwrite_if_exists}; ^ ..\Includes\boost/filesystem/v3/operations.hpp(127): error: expected a ";" {none, fail_if_exists = none, overwrite_if_exists}; ^ ..\Includes\boost/filesystem/v3/operations.hpp(150): error: identifier "copy_option" is undefined BOOST_SCOPED_ENUM(copy_option) option, // See ticket #2925 ^ ..\Includes\boost/filesystem/v3/operations.hpp(299): error: identifier "copy_option" is undefined BOOST_SCOPED_ENUM(copy_option) option) ^ ..\Includes\boost/filesystem/v3/operations.hpp(303): error: name followed by "::" must be a class or namespace name {detail::copy_file(from, to, copy_option::fail_if_exists);} ^ ..\Includes\boost/filesystem/v3/operations.hpp(306): error: identifier "copy_option" is undefined BOOST_SCOPED_ENUM(copy_option) option, system::error_code& ec) ^ ..\Includes\boost/filesystem/v3/operations.hpp(310): error: name followed by "::" must be a class or namespace name {detail::copy_file(from, to, copy_option::fail_if_exists, &ec);} ^ ..\Includes\boost/filesystem/v3/operations.hpp(642): error: expected either a definition or a tag name BOOST_SCOPED_ENUM_START(symlink_option) ^ ..\Includes\boost/filesystem/v3/operations.hpp(643): error: expected an identifier { ^ ..\Includes\boost/filesystem/v3/operations.hpp(643): error: expected a ";" { ^ ..\Includes\boost/filesystem/v3/operations.hpp(648): warning #12: parsing restarts here after previous syntax error }; ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: identifier "symlink_option" is undefined BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: identifier "symlink_option" is undefined BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: identifier "symlink_option" is undefined BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: nonmember operator requires a parameter with class or enum type BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(651): error: identifier "symlink_option" is undefined BOOST_BITMASK(BOOST_SCOPED_ENUM(symlink_option)) ^ The two errors above are repeated and repeated many times so I removed then to save bandwidth, space and time. ..\Includes\boost/filesystem/v3/operations.hpp(662): error: name followed by "::" must be a class or namespace name recur_dir_itr_imp() : m_level(0), m_options(symlink_option::none) {} ^ ..\Includes\boost/filesystem/v3/operations.hpp(678): error: name followed by "::" must be a class or namespace name if ((m_options & symlink_option::_detail_no_push) == symlink_option::_detail_no_push) ^ ..\Includes\boost/filesystem/v3/operations.hpp(678): error: name followed by "::" must be a class or namespace name if ((m_options & symlink_option::_detail_no_push) == symlink_option::_detail_no_push) ^ ..\Includes\boost/filesystem/v3/operations.hpp(679): error: name followed by "::" must be a class or namespace name m_options &= ~symlink_option::_detail_no_push; ^ ..\Includes\boost/filesystem/v3/operations.hpp(682): error: name followed by "::" must be a class or namespace name || (m_options & symlink_option::recurse) == symlink_option::recurse)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(682): error: name followed by "::" must be a class or namespace name || (m_options & symlink_option::recurse) == symlink_option::recurse)) ^ ..\Includes\boost/filesystem/v3/operations.hpp(737): error: identifier "symlink_option" is undefined BOOST_SCOPED_ENUM(symlink_option) opt = symlink_option::none) ^ ..\Includes\boost/filesystem/v3/operations.hpp(737): error: name followed by "::" must be a class or namespace name BOOST_SCOPED_ENUM(symlink_option) opt = symlink_option::none) ^ ..\Includes\boost/filesystem/v3/operations.hpp(747): error: identifier "symlink_option" is undefined BOOST_SCOPED_ENUM(symlink_option) opt, ^ ..\Includes\boost/filesystem/v3/operations.hpp(737): error: name followed by "::" must be a class or namespace name BOOST_SCOPED_ENUM(symlink_option) opt = symlink_option::none) ^ ..\Includes\boost/filesystem/v3/operations.hpp(761): error: name followed by "::" must be a class or namespace name m_imp->m_options = symlink_option::none; ^ ..\Includes\boost/filesystem/v3/operations.hpp(783): error: name followed by "::" must be a class or namespace name return (m_imp->m_options & symlink_option::_detail_no_push) ^ ..\Includes\boost/filesystem/v3/operations.hpp(784): error: name followed by "::" must be a class or namespace name == symlink_option::_detail_no_push; ^ ..\Includes\boost/filesystem/v3/operations.hpp(802): error: name followed by "::" must be a class or namespace name m_imp->m_options |= symlink_option::_detail_no_push; ^ ..\Includes\boost/filesystem/v3/operations.hpp(804): error: name followed by "::" must be a class or namespace name m_imp->m_options &= ~symlink_option::_detail_no_push; ^ ..\Includes\boost/filesystem/v3/operations.hpp(988): error: namespace "boost::filesystem3" has no member "copy_option" using filesystem3::copy_option; ^ ..\Includes\boost/filesystem/v3/operations.hpp(1031): error: namespace "boost::filesystem3" has no member "symlink_option" using filesystem3::symlink_option; ^ -- Bill [View Less]

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[Container] Forward declaration of movable types
by Szymon Gatner 17 Aug '11

17 Aug '11

Hi, I am evaluating container library by Ion Gaztanaga. I know it is not officially a part of boost yet but I didn't know where else to ask this question. My problem: If there is a movable class 'MyMovable' (I use boost.move) it can be stored without unnecessary copies in move-aware vector that is declared like so: vector<MyMovable> movables; which is very cool until this vector is suppose be a member of other class like: //widget.hpp class Widget { vector<MyMovable> … [View More]

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About Bug #4978 (deadlock on interrupt)
by Fabien Chêne 17 Aug '11

17 Aug '11

Hello, The bug #4978 seems to be fixed, according to its status. However, is it really fixed in the release 1.47, as indicated by a comment at the end ? I cannot see anything about that in the release note for 1.47. I think that it would be worth mentioning it. Regards, -- Fabien

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Re: [Boost-users] [containers review] A reminder that the containers review ends tomorrow
by John Maddock 17 Aug '11

17 Aug '11

The containers library review is now officially over. However, there are still a few drips a drabs of reviews coming in.... are there any more still pending? Thanks, John.

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[MPI][Boost] Some Questions About Delta Stepping Dijkstra in Boost
by Chen Kai 17 Aug '11

17 Aug '11

Environment: Boost1.47 + Microsoft HPC 2008 SDK I find Delta Stepping Dijkstra and Crauser Dijkstra in boost, and both of them are slower than sequential dijkstra in boost. (About 10 times slower. I used 10 graphs, the biggest graph contains 10 million nodes and 10 million edges) Q1: I wonder why the parallel dijkstra is slower than sequential version? Q2: Can I adjust the number of threads that Delta Stepping used? (For exemple, I want it use 1, 2, 3, 4 threads respectively. And Can I make … [View More]

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problems with installing boost python
by Wilson Tan 17 Aug '11

17 Aug '11

Hello everyone, I had been trying to build BOOST for SST, but so far I had been unsuccessful with the Python(and IOSTREAM) components. I followed Section 3.1( http://www.boost.org/doc/libs/1_47_0/libs/python/doc/building.html) but even that is not fully successful: wilson@vorpalsword:~/SST/boost_1_47_0$ ./bjam --build-dir=~/SST/boost_1_47_0/libs/python/example/quickstart toolset=gcc --verbose-test test notice: could not find main target test notice: assuming it is a name of file to create. … [View More]

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