September 2014 - Boost - lists.preview.boost.org

A GUI Library
by jinhao 09 Nov '17

09 Nov '17

Hi, all I am developing a GUI library, it takes aim at easy-to-use and portable library for modern C++ methods. The project at http://stdex.sourceforge.net A git repository at http://nanapro.codeplex.com A brief at http://nanaproject.wordpress.com/2011/12/16/preliminary-study-of-nana-c-lib… Is there any interest in this library? Regards Jinhao

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bad include guards
by Steven Watanabe 26 Jan '17

26 Jan '17

AMDG The following pairs of files have identical include guards ./boost/concept_check/general.hpp ./boost/concept/detail/msvc.hpp ./boost/concept_check/msvc.hpp ./boost/concept/detail/msvc.hpp ./boost/filesystem/cerrno.hpp ./boost/cerrno.hpp ./boost/interprocess/containers/tree.hpp ./boost/interprocess/containers/detail/tree.hpp ./boost/mpl/min_max.hpp ./boost/mpl/max.hpp ./boost/mpl/vector/aux_/front.hpp ./boost/mpl/list/aux_/front.hpp ./boost/multi_index/identity_fwd.hpp ./boost/multi_index/identity.hpp ./boost/python/pointee.hpp ./boost/python/detail/pointee.hpp ./boost/spirit/phoenix/closures.hpp ./boost/lambda/closures.hpp ./boost/xpressive/proto/v1_/proto_typeof.hpp ./boost/xpressive/proto/proto_typeof.hpp ./libs/config/test/boost_no_dep_nested_class.ipp ./libs/config/test/boost_has_vc6_mem_templ.ipp ./libs/config/test/boost_no_mem_templates.ipp ./libs/config/test/boost_has_vc6_mem_templ.ipp ./libs/config/test/boost_no_std_allocator.ipp ./libs/config/test/boost_has_vc6_mem_templ.ipp ./libs/conversion/test.hpp ./libs/any/test.hpp ./libs/interprocess/example/print_container.hpp ./libs/interprocess/example/printcontainer.hpp ./libs/interprocess/test/expand_bwd_test_template.hpp ./libs/interprocess/test/allocation_test_template.hpp ./libs/interprocess/test/printcontainer.hpp ./libs/interprocess/example/printcontainer.hpp ./libs/interprocess/test/print_container.hpp ./libs/interprocess/example/printcontainer.hpp ./libs/iostreams/test/detail/utf8_codecvt_facet.hpp ./boost/detail/utf8_codecvt_facet.hpp ./libs/regex/test/regress/test_regex_search.hpp ./libs/regex/test/regress/test_partial_match.hpp ./libs/serialization/test/C.hpp ./libs/serialization/test/A.hpp ./libs/xpressive/perf/regex_comparison.hpp ./libs/regex/performance/regex_comparison.hpp ./tools/inspect/time_string.hpp ./tools/common/time_string.hpp In Christ, Steven Watanabe

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[context] msvc /SAFESEH
by Jeff Flinn 12 Aug '15

12 Aug '15

I need to build my application with /SAFESEH which uses boost coroutine which uses context. I'm getting the following link errors: 1>libboost_context-vc100-mt-gd-1_53.lib(jump_i386_ms_pe_masm.obj) : error LNK2026: module unsafe for SAFESEH image. 1>libboost_context-vc100-mt-gd-1_53.lib(make_i386_ms_pe_masm.obj) : error LNK2026: module unsafe for SAFESEH image. I've built boost static libs with the same MSVC vesion and options (sans /SAFESEH as it's not a compile/lib option) Compiler/linker versions: Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.40219.01 for 80x86 Microsoft (R) Incremental Linker Version 10.00.40219.01 Has anyone run into this and resolved the error? Any insight is appreciated. Thanks, Jeff

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Arguing about names in Boost libraries
by Edward Diener 06 May '15

06 May '15

What is wrong with the people commenting on libraries for Boost who are so concerned about the names being used ? We are talking only about C++ identifiers and yet there are now endless discussions where people disagree on names or argue that some name is not what they want or that they like some other name, with a list of names that they find adequate. This is irrelevant. There is something mentally wrong about all those peoples spending endless amounts of time around this issue. I notice this does not happen nowadays for just one library but for ever single library, or proposed library, which is mentioned on this mailing list. Is this the way all of you people actually work in your daily jobs, or on your own projects, spending hours and days arguing with others about C++ identifiers for every little thing ? Are you not aware of the absurdity of your endless remarks ? Grow up ! Surely there are better things to do than carry on endlessly about some name, that is should be x or y or z or some other inane preferable list. It's time for somebody to say this, so I will do it. A C++ identifier name, as long as it is vaguely about what the functionality entails, is perfectly adequate. It does not have to satisfy everyone in the universe. Period !

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[build] b2 headers broken?
by Eric Niebler 02 Mar '15

02 Mar '15

I just updated to the latest develop. I ran bootstrap, then nuked my boost directory and reran b2 headers. Worked fine. Then I changed directory to libs/proto/test and ran ../../../b2 mem_ptr to run a test. Here's what I get: f:\modular-boost\libs\proto\test>..\..\..\b2 mem_ptr Performing configuration checks - symlinks supported : no - junctions supported : yes - hardlinks supported : yes ...patience... ...patience... ...found 4951 targets... ...updating 441 targets... common.mkdir ..\..\..\bin.v2\libs common.mkdir ..\..\..\bin.v2\libs\proto common.mkdir ..\..\..\bin.v2\libs\proto\test common.mkdir ..\..\..\bin.v2\libs\proto\test\mem_ptr.test common.mkdir ..\..\..\bin.v2\libs\proto\test\mem_ptr.test\msvc-12.0 common.mkdir ..\..\..\bin.v2\libs\proto\test\mem_ptr.test\msvc-12.0\debug common.mkdir ..\..\..\bin.v2\libs\proto\test\mem_ptr.test\msvc-12.0\debug\link-static common.mkdir ..\..\..\bin.v2\libs\proto\test\mem_ptr.test\msvc-12.0\debug\link-static\threading-multi link.rm ..\..\..\boost\mpl common.mkdir ..\..\..\boost\mpl link.hardlink ..\..\..\boost\mpl\print.hpp Hardlink created for ..\..\..\boost\mpl\print.hpp <<===>> ..\..\mpl\include\boost\mpl\print.hpp <snip> link.rm ..\..\..\boost\numeric\conversion link.hardlink ..\..\..\boost\numeric\conversion\conversion_traits.hpp The system cannot find the path specified. if exist "..\..\..\boost\numeric\conversion\conversion_traits.hpp" del "..\..\..\boost\numeric\conversion\conversion _traits.hpp" mklink /H "..\..\..\boost\numeric\conversion\conversion_traits.hpp" "..\..\numeric\conversion\include\boost\numeric\ conversion\conversion_traits.hpp" ...failed link.hardlink ..\..\..\boost\numeric\conversion\conversion_traits.hpp... link.hardlink ..\..\..\boost\numeric\conversion\int_float_mixture_enum.hpp The system cannot find the path specified. For some reason, b2 thinks it needs to rerun b2 headers, but it does a crap job of it and dies. What's going on? Eric

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Interactive metaprogramming shells
by Abel Sinkovics 28 Dec '14

28 Dec '14

Hi, I've built interactive shells for preprocessor and template metaprogramming. I've been using them for development and debugging of metaprograms and I think Boost developers could also find them useful. You can type in (metaprogramming) expressions which get evaluated and the result is displayed immediately. For example you can type boost::mpl::push_front<boost::mpl::vector<int, char>, double>::type and you get boost_::mpl::vector<double, int, char> as the result (the boost_ namespace is used because there are some tricks there to make the output more readable). As an example for the preprocessor shell you can type BOOST_PP_REPEAT(3, foo BOOST_PP_TUPLE_EAT(3), ~) and you get foo foo foo as the result. The tools are based on the Boost.Wave library and Clang. You can get them here: Preshell for preprocessor: https://github.com/sabel83/preshell Metashell for template metaprograms: https://github.com/sabel83/metashell You can also try them from your browser here: http://abel.web.elte.hu/shell Feedback is welcome. Regards, Ábel

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IDE for developing Boost
by Jens Müller 20 Dec '14

20 Dec '14

Hi, I am looking for recommendations for developing Boost, especially code in the graph library. At work, most developers (not for Boost, for some commercial software), most developers are using Eclipse. This works quite fine as soon as it has properly auto-discovered include paths etc. But before fiddling around with Eclipse to get all the settings right, I'd wanted to to ask for your recommendations. And maybe there are already settings available to make it "just work", at least initially. Cheers, Jens

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[coroutine] x86 msvc11 stack corruption
by Tobias Loew 12 Dec '14

12 Dec '14

Hi, I use Boost 1.55 uni-directional coroutines to build an x86 MSVC11 application. I have a simple pull-type (boost::coroutines::coroutine<void>::pull_type) that under certain reproducable conditions destroys the stack after returning from the coroutine. Here is the corrupted stack as shown by VS2012 > ebs2000.exe!CScriptMainFrame::DoRun(CPascalEditorDoc * 0x00000000, int 0x00000000, int 0x00000000) Line 3372 C++ ebs2000.exe!CScriptMainFrame::OnDebugStepover() Line 4916 C++ mfc110u.dll!_AfxDispatchCmdMsg(CCmdTarget *, unsigned int, int, void (void) *, void *, unsigned int, AFX_CMDHANDLERINFO *) C++ 00000002() Unknown [Frames below may be incorrect and/or missing] mfc110u.dll!CCmdTarget::OnCmdMsg(unsigned int, int 0x00000000, void *, AFX_CMDHANDLERINFO *) Line 364 C++ mfc110u.dll!CWnd::OnCommand(unsigned int 0x00018263, long 0x00000000) Line 2785 C++ mfc110u.dll!CFrameWnd::OnCommand(unsigned int 0x00018263, long 0x00000000) Line 389 C++ ... This only happens in windows x86 32-bit release-builds when the coroutine finishes upon a user-action that also includes a windows WM_SETFOCUS message on my menu-bar. If at least one of the following is true, the stack-corruption does NOT happen: - debug-build - x64 build - using a different pull-type, e.g. enum status_enum{...}; boost::coroutines::coroutine<status_enum>::pull_type - not returning form the coroutine, but pushing just before the end of the coroutine and swapping the pull-type-variable with a default constructed "not-a-coroutine" Even though I have a lot of workarounds, I still would like to know, why this happens. regards Tobias PS: I had to recompile ml /safeseh /c make_i386_ms_pe_masm.asm ml /safeseh /c jump_i386_ms_pe_masm.asm to get SAFESEH-libraries. -- View this message in context: http://boost.2283326.n4.nabble.com/coroutine-x86-msvc11-stack-corruption-tp… Sent from the Boost - Dev mailing list archive at Nabble.com.

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Review request for Compute
by Antony Polukhin 10 Dec '14

10 Dec '14

Hi, Please add the the Compute library to the review schedule. Compute is a GPU/parallel-computing library for C++ based on OpenCL. Author: Kyle Lutz Source code: https://github.com/kylelutz/compute Documentation: http://kylelutz.github.io/compute/ Review Manager: Antony Polukhin Approximate review date: end of November - December 2014 -- Best regards, Antony Polukhin

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[mpl] [build] [testing] Merge pull requests
by Andrey Semashev 08 Dec '14

08 Dec '14

Hi, There were a lot of discussions about MPL recently, and I created a few pull requests to address issues: https://github.com/boostorg/boost/pull/39 Invoke 'headers' target before building testing tools. Note that several testers are currently failing to run because of this problem. Since this affects the testing process, I'd appreciate if someone familiar with it could take a look. https://github.com/boostorg/boost/pull/38 Add MPL.Core tests to the test report. These tests are currently not run by testers. https://github.com/boostorg/mpl/pull/12 Move a misplaced header from MPL to MPL.Core to resolve circular dependency between the two. I believe the first PR is especially critical. Could someone with permissions merge these? Thanks.

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[Range] New I/O functions for ranges
by Indiana 25 Nov '14

25 Nov '14

I'm currently putting together a proposal to the standards committee about a set of range I/O functions, but i think they would make a good addition to Boost as well. They would probably fit in the Range library - i don't think they warrant a library all of their own. The stuff i wrote for the standards proposal is available at http://cpp.indi.frih.net/rangeio/ - it goes into quite a bit of detail about the interface, and links to a sample implementation. But here's the executive summary: There is a single output function - currently called "write_all" - that takes a range and, optionally, a delimiter, like this: // BEGIN CODE ///////////////////////// auto const r = std::array<int, 4>{1, 2, 3, 4}; cout << write_all(r); // prints "1234" cout << "{ " << write_all(r, ", ") << " }"; // prints "{ 1, 2, 3, 4 }" // END CODE /////////////////////////// It takes anything that works with range-for, so it works with range adaptors: // BEGIN CODE ///////////////////////// struct is_even { auto operator()(int x) const -> bool { return x % 2 == 0; } }; cout << write_all(r | reversed | filtered(is_even{})); // prints "42" // END CODE /////////////////////////// Note also that the delimiter doesn't have to be a string (there are some examples in the reference of that). Why not just use std::copy() and stream iterators? Several reasons - the most obvious of which you can see above: this syntax is much cleaner, much less error-prone, well-integrated with the existing stream I/O mechanisms, and it produces properly delimited output (unlike the delimited version of ostream_iterator). But also, stream formatting is properly handled: // BEGIN CODE ///////////////////////// auto const r = std::array<int, 3>{1, 2, 3}; std::cout.width(3); std::cout.fill('0'); // --------------------------- // The old way: using std::begin; using std::end; std::copy(begin(r), end(r), std::ostream_iterator<int>{std::cout, ", "}); // even with Boost.Range, this just reduces to: //boost::copy(r, std::ostream_iterator<int>{std::cout, ", "}); // prints: "001, 2, 3, " // --------------------------- // The new way: std::cout << write_all(r, ", "); // prints "001, 002, 003" // END CODE /////////////////////////// And of course this works as expected in chained expressions: // BEGIN CODE ///////////////////////// auto const r = array<int, 3>{1, 2, 3}; cout.width(3); cout.fill('0'); cout << '(' << setw(3) << setfill('0') << write_all(r, ',') << ')'; // prints: "(001,002,003)" // END CODE /////////////////////////// It is also possible to get more information about errors, and react better to them. If there is an error in the formatting or in the stream during an output operation using std::copy() and ostream_iterator, the algorithm will chug merrily along until it's all the way through the range even though it's no longer writing anything. You will have no way to detect where the problem occurred - did it fail after the first element was written, or *before*, or did it fail after the millionth element? If the range is begin lazy-generated, that could be particularly wasteful, or even problematic. By contrast, write_all() stops immediately when there is an error in the output stream. It is even possible get more information about the last range write operation by capturing the temporary object, like this: // BEGIN CODE ///////////////////////// auto const r = array<int, 3>{1, 2, 3}; auto p = write_all(r); cout << p; if (!cout) { cerr << "only " << p.count << " elements written\n"; cerr << "next element would have been " << *p.next << '\n'; } // END CODE /////////////////////////// On the input side, there are 7 functions: * overwrite * back_insert * front_insert * insert * back_insert_n * front_insert_n * insert_n Overwrite simply replaces the contents of a range with whatever is read from input: // BEGIN CODE ///////////////////////// auto r = array<int, 100>{}; cin >> overwrite(r); // reads up to 100 ints // END CODE /////////////////////////// The *insert functions map to the *insert_iterators in the standard library, using push_back(), push_front(), or insert(). In each case: in >> ???insert(r[, i]); is basically equivalent to: copy(istream_iterator<value_type_of_r>{in}, // use braces on the next line, or face the most vexing parse istream_iterator<value_type_of_r>{}, ???inserter(r[, i])); The *insert_n functions are for the common case where you know in advance how many elements will be read, at maximum - or for when you want to limit the amount of elements read in a single read operation. This: in >> ???insert_n(r[, i], n); is conceptually equivalent to: copy_n(istream_iterator<value_type_of_r>{in}, n, ???inserter(r[, i])); except it can handle formatting and errors properly. The reference at http://cpp.indi.frih.net/rangeio/ goes into much more detail, of course. Why add it to Boost? Because these operations (reading/writing ranges) are so common they are almost universal, and there is no standard facility that handles them easily or well. They are not *difficult* to implement, but they are far from trivial - for example, you might think write_all() is just a simple range-for loop or for_each(), and it is... up until you add error checking, the delimiter, and formatting awareness. A sample implementation already exists - it can be implemented portably in pure standard C++11. (Can it be implemented in C++03 with? Good question. It might be possible with some Boost help, but it might require dependencies on libraries other than Boost.Range. If this proposal finds approval, that's something i can look into.) Would there be any interest in adding these functions to Boost.Range?

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Changes in Boost.Optional
by Dean Michael Berris 24 Nov '14

24 Nov '14

Suppose I have the following type: struct container { boost::optional<uint16_t> optional() const { return value_; } private: boost::optional<uint16_t> value_; }; struct value_wrapper { value_wrapper(const container& c) : c_(c) {} operator uint16_t () { return 1; } operator boost::optional<uint16_t>() { return c_.optional(); } private: const container& c_; }; And that I have the following function: value_wrapper value(const container& c) { return value_wrapper(c); } The following used to work in MSVC 2010: container c; // leave c.value_ alone. boost::optional<uint16_t> some_value = value(c); assert(!some_value); Now with Boost 1.56, this breaks because the constructor for some_value from a temporary optional is now marked explicit. What is the work-around for the previous behavior to be regained? All the following changes cause the assertion to fail: boost::optional<uint16_t> some_value(value(c)); assert(!some_value); // some_value's constructor will use the uint16_t conversion operator, therefore some_value == 1 boost::optional<uint16_t> some_value = static_cast<boost::optional<uint16_t> >(value(c)); assert(!some_value); // same problem as above, the temporary created will favor the uint16_t conversion operator Help? PS. For better context, see https://github.com/cpp-netlib/cpp-netlib/blob/0.11-devel/boost/network/prot…

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Ticketspam
by Daniel Frey 17 Oct '14

17 Oct '14

One more to remove: <https://svn.boost.org/trac/boost/ticket/10560> Thanks, Daniel

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It's that time again already - Boost 1.57.0 schedule
by Marshall Clow 08 Oct '14

08 Oct '14

It’s that time again. Here’s the schedule for the upcoming 1.57 release. If you’ve got changes that you’ve been putting off making, now’s the time to get busy. * 13-Oct Last day for significant changes * 20-Oct Beta build * 27-Oct Automatic merging turned off, build an RC * 3-Nov Release Boost 1.57.0 Questions? Ask them here. — The Boost release managers. P.S. We’ll be updating the calendar on boost.org/development soon.

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Submodules of Boost libraries
by Mathias Gaunard 07 Oct '14

07 Oct '14

Hi folks, I'd like to ready my library for inclusion into Boost. My library is made of several modules, and I'd like to keep that into Boost. How does Boost handles multiple submodules within a library submodule?

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[modularization] LocalFunction and ScopedExit cycle
by Vicente J. Botet Escriba 06 Oct '14

06 Oct '14

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[static_if] Is there interest in a `static if` emulation library?
by Lorenzo Caminiti 01 Oct '14

01 Oct '14

Hello all, With C++14 generic lambdas, it is possible to implement a sort of `static if` (see also N3613): template< typename T > void assign ( T& x, T const& y ) { x = y; static_if<boost::has_equal_to<T>::value>( std::bind([] ( auto x, auto y ) { assert(x == y); std::cout << "asserted for: " << typeid(T).name() << std::endl; }, x, y) ).else_( [] ( ) { std::cout << "cannot assert for: " << typeid(T).name() << std::endl; } ); } The bind around the generic lambda is a bit verbose... but this code compiles, asserts when called on int, and does not assert when called on x_t (tested on clang 3.4.2): int i = 1; struct x_t { } x; assign(i, i); // asserts assign(x, x); // does not assert I have attached a reference implementation. Thank you. --Lorenzo P.S. I didn't do much background research... sorry if this topic has already been considered and discussed in Boost.

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[move] Build failures in develop
by Andrey Semashev 01 Oct '14

01 Oct '14

Hi, I'm seeing lots of build errors that originate from Boost.Move, such as: In file included from ../libs/log/src/text_file_backend.cpp:41: In file included from ../boost/filesystem/path.hpp:28: In file included from ../boost/iterator/iterator_facade.hpp:12: In file included from ../boost/iterator/interoperable.hpp:11: In file included from ../boost/mpl/or.hpp:23: ../boost/mpl/aux_/nested_type_wknd.hpp:27:10: error: no type named 'type' in 'boost::move_detail::is_rv<boost::rv<boost::log::v2_mt_posix::aux::light_function<void ()> > >' : T::type ~~~^~~~ See the full error logs: http://www.boost.org/development/tests/develop/developer/output/marshall-ma… http://www.boost.org/development/tests/develop/developer/output/teeks99-08b… http://www.boost.org/development/tests/develop/developer/output/teeks99-tes… I didn't change Boost.Log for quite some time, so there seems to have been some breaking change. Could this be fixed?

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[thread] Build failures in develop
by Andrey Semashev 01 Oct '14

01 Oct '14

Hi, Boost.Thread currently fails to build on MSVC, which affects other libraries: http://www.boost.org/development/tests/develop/developer/output/teeks99-08d… Could it be fixed?

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[modularization] request for a new modularization status for develop branch
by Vicente J. Botet Escriba 01 Oct '14

01 Oct '14

Hi Peter, could you upload a new modularization status, as in http://www.pdimov.com/tmp/report-d53f656/module-levels.html ? Best, Vicente

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[Modularization][optional][functional] boost::none - what do we want it to be?
by Andrzej Krzemienski 30 Sep '14

30 Sep '14

Hi Everyone, I know it may be premature to to think about removing every cycle in Boost, but while looking at the cycle reports I found that at least one library is using boost::none, for a purpose different than indicating an uninitialized boost::optional. It is in Boost.Functional: https://github.com/boostorg/functional/blob/master/include/boost/functional… It uses none_t as a default type for a template type parameter Allocator. My question is: what do we want boost::none_t to indicate, at least in Boost? 1. A value-semantic alternative to void, that anyone can use? 2. A tag indicating boost::optional<T> without a value? The answer to this question dictates how we should untie the cycle. I know it is too soon to care about small cycles right now, but my question is more about "the principles". Regards, &rzej

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"Easy Build and Install" fails at bootstrap.sh
by Josh Juran 30 Sep '14

30 Sep '14

I'm building Boost from Git since there's no secured download option, only HTTP. josh@alice:~/src/boost$ git log --oneline -n1 43bb782 Update thread from master. josh@alice:~/src/boost$ ./bootstrap.sh ./bootstrap.sh: 1: ./bootstrap.sh: ./tools/build/src/engine/build.sh: not found Building Boost.Build engine with toolset ... Failed to build Boost.Build build engine Consult 'bootstrap.log' for more details josh@alice:~/src/boost$ cat bootstrap.log ./bootstrap.sh: 218: cd: can't cd to ./tools/build/src/engine Do I need to run git-submodule? It would be helpful if Getting Started covered this. Josh

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[iostreams]Bugs in dual seekable mode
by Jorge Lodos 29 Sep '14

29 Sep '14

Currently there are no tests for dual seekable streams. New tests (dual_seekable_test.cpp in the ticket) uncover the following bugs: 1. The functions test_seekable_in_chars and test_seekable_in_chunks in test/detail/verification.hpp use seekp in several places where seekg should be used. This has no effect when there is a single head but does not work when the stream is dual seekable. 2. indirect_streambuf::seek_impl does not work for dual seeking. The problem is that both heads are modified for both input and output operations. Since the modification is the same (just resetting the pointers) everything works when there is a single head. This is a duplicate of https://svn.boost.org/trac/boost/ticket/7681. 3. The function shared_buffer() does not consider dual_seekable stream buffers as shared. 4. The function init_put_area() does not consider the existing input position. This is a duplicate of https://svn.boost.org/trac/boost/ticket/8572. With the attached (in the ticket) versions of verification.hpp and indirect_streambuf.hpp all previously existing tests passed. I recommend adding the new tests in dual_seekable_test.cpp. I have created the ticket https://svn.boost.org/trac/boost/ticket/10561 Best regards Jorge

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[thread] Specific old move semantics usage
by Vicente J. Botet Escriba 27 Sep '14

27 Sep '14

Hi all, I would like to remove the specific move semantics included in Boost.Thread as it was flawed. This has been replaced by the Boost.Move one long time ago. Is there someone still using it? Could I at least define by the default (even for BOOST_THREAD_VERSION 2) BOOST_THREAD_USES_MOVE for Boost 1.57? Best, Vicente

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[Modularization] Range and Spirit dependencies
by Stephen Kelly 27 Sep '14

27 Sep '14

Hello, Boost 1.55 has been out for some weeks. I repeat my recommendation to remove the Boost.Algorithm dependency from Boost.Range and the Boost.Serialization dependency from Boost.Spirit. http://thread.gmane.org/gmane.comp.lib.boost.devel/251966/focus=252090 http://thread.gmane.org/gmane.comp.lib.boost.devel/251966/focus=251968 http://thread.gmane.org/gmane.comp.lib.boost.devel/252250/focus=252293 Thanks, Steve.

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