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boost::filesystem BUG !! (Windows XP)
by Saurabh Sood 01 Jul '05

01 Jul '05

Hi all, Input : dir_path \code boost::filesystem::path p(dir_path, boost::filesystem::native); boost::filesystem::directory_iterator i(p), j; while (i != j) { std::cout << i->string(); // Output ++i; } \endcode On Windows XP, If input dir_path is "d:\" , the i->string() returns complete path of all files and directories. BUT, If input dir_path is "d:" , the i->string() returns relative path of all files and directories. Please check if this is desired behaviour or not !! thanks saurabh

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Tuple.hpp: initialization data in header
by Edson Tadeu 30 Jun '05

30 Jun '05

My compiler is complaining that tuple_basic.hpp has data initialization in header, at this line: detail::swallow_assign const ignore = detail::swallow_assign(); Because of this, it can't cache the headers, and compilation times goes turtle speed. Is there a simple way to overcome this, without the need to create a .cpp and linking it or without using macros?? Thanks :)

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Re: [Boost-users] supressing "extra ;" warnings with GCC 3.4
by Sohail Somani 30 Jun '05

30 Jun '05

> -----Original Message----- > From: boost-users-bounces(a)lists.boost.org > [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Paul Johnson > Sent: Thursday, June 30, 2005 6:20 AM > To: boost-users(a)lists.boost.org > Subject: Re: [Boost-users] supressing "extra ;" warnings with GCC 3.4 > > > David Abrahams wrote: > > Dave Steffen <dgsteffen(a)numerica.us> writes: > > > > > >> I claim that our macros and use thereof is A) correct and > B) safe. It > >> just so happens that these macro constructs occasionally expand to > >> something that has an extra semicolon, which triggers a warning in > >> GCC 3.4 that we haven't seen before. > > > > > > The warning will be an error on other compilers. The semicolons > > aren't just "bad style;" they're illegal. > > Uhh... why? Example? I believe extra semicolons are illegal after namespace declarations and function definitions atleast. A semicolon in a function is an empty statement which is legal. Disclaimer: I am not a language lawyer, I just play one on email.

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[Boost][lambda] Newbie Questions: member pointer operator use
by Brian Allison 30 Jun '05

30 Jun '05

Hi All, Given two vector<Rec*> S.T. : vector<Rec*> src; vector<Rec*> dst; Where 'src' has some elements that are useful, is there a more succint way to say: for_each(src.begin(), src.end(), if_then( bind<bool>(&vector<Rec*>::empty, &var(dst)), bind<void>(&vector<Rec*>::push_back, &var(dst), _1) ) ); Originally I tried using the member pointer operator, but this it gave me compile fits (Red Hat with a 2.4.20-8 kernel, GCC 3.4.3) with this: for_each(src.begin(), src.end(), if_then(bind<bool>(&vector<Rec*>::empty, &var(dst)), (&var(dst) ->* &vector<Rec*>::push_back)(_1) ) ); Is that a valid use of the member pointer operator? Thanks, Brian

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[BGL] Problem report - graphviz_read has syntax error for g++ 3.3.1
by Tan Kwee Heong 29 Jun '05

29 Jun '05

Hi, I hope this is the right forum to post this bug I found. If not, let me know and I'll repost. Thanks, ---------------------------------------------------------------------------- - platform : win2k boost version : 1_32_0 compiler : g++ 3.3.1 (cygming special) build : both debug and release ( static linking of graphviz library ) Symptoms: 1) Reading a digraph .dot file causes a syntax error to be emitted 2) The BGL example testcase has a false pass This problem occurred in my BGL code, but to reproduce the problem, it is easier to use the BGL example program example/graphviz.cpp, as annotated below. 1) This step runs the graphviz testcase in <boost>\libs\graph\example. Although I built both debug and released, I've retained only the relevant "release" output. | h:\vault\boost\boost_1_32_0\libs\graph\example>bjam -d2 --preserve-test-targ ets -sTOOLS=gcc -sBUILD="debug release <runtime-link>static" graphviz | ... | gcc-C++-action ..\..\..\bin\boost\libs\graph\example\graphviz.test\gcc\debug\runtime-link-s tatic\graphviz.obj | "g++" -c -Wall -ftemplate-depth-255 -g -O0 -fno-inline -I"..\..\..\bin \boost\libs\graph\example" -I "h:\vault\boost\boost_1_32_0" -o "..\..\..\bin\boost\libs\graph\example\graphviz.test\gcc\debug\runtime-link- static\graphviz.obj" "..\..\..\libs\graph\example\graphviz.cpp" | gcc-Link-action ..\..\..\bin\boost\libs\graph\example\graphviz.test\gcc\debug\runtime-link-s tatic\graphviz.exe | "g++" "-Wl,--enable-auto-image-base" -static -g -o "..\..\..\bin\boost\libs\graph\example\graphviz.test\gcc\debug\runtime-link- static\graphviz.exe" -L"../../../bin/boost/libs/graph/build/libbgl-viz.lib/ gcc/debug/runtime-link-static" "..\..\..\bin\boost\libs\graph\example\graphviz.test\gcc\debug\runtime-link- static\graphviz.obj" "..\..\..\bin\boost\libs\graph\build\libbgl-viz.lib\gcc\debug\runtime-link-s tatic\libbgl-viz.lib" "..\..\..\bin\boost\libs\graph\build\libbgl-viz.lib\gcc\debug\runtime-link-s tatic\libbgl-viz.lib" | | execute-test ..\..\..\bin\boost\libs\graph\example\graphviz.test\gcc\debug\runtime-link-s tatic\graphviz.run | ... 2) Note the **passed"" line. | **passed** ..\..\..\bin\boost\libs\graph\example\graphviz.test\gcc\debug\runtime-link-s tatic\graphviz.test | 3) This step shows running the testcase executable built above, manually, showing the syntax error emitted. | H:\vault\boost\boost_1_32_0\bin\boost\libs\graph\example\graphviz.test\gcc\r elease\runtime-link-static>graphviz ../../../../../../../../../libs/graph/example/graphviz_test.dot | graphviz ../../../../../../../../../libs/graph/example/graphviz_test.dot | This is an example to demonstrate how to read graphviz file | and how to write graph to graphviz format. | | | Usage: graphviz <input>.dot <output>.dot | If only have one xxx.dot in command line, | the second dot is graphviz_test_new.dot by default. | If there is no input and output dot file in command line, input is graphviz_test.dot and output graphviz_test_new.dot. | syntax error | 4) This step shows an equivalent VC7.1 build that runs correctly. | H:\vault\boost\boost_1_32_0\bin\boost\libs\graph\example\graphviz.test\vc-7_ 1\release\runtime-link-static>graphviz ../../../../../../../../../libs/graph/example/graphviz_test.dot | graphviz ../../../../../../../../../libs/graph/example/graphviz_test.dot | This is an example to demonstrate how to read graphviz file | and how to write graph to graphviz format. | | | Usage: graphviz <input>.dot <output>.dot | If only have one xxx.dot in command line, | the second dot is graphviz_test_new.dot by default. | If there is no input and output dot file in command line, input is graphviz_test.dot and output graphviz_test_new.dot. | a1 --> a2 b3 | a2 --> a3 | a3 --> end | a0 --> a1 a2 a3 | b0 --> b1 a1 a2 a3 a0 | b1 --> b2 a1 a2 a3 a0 | b2 --> b3 a1 a2 a3 a0 a3 | b3 --> a1 a2 a3 a0 end | start --> a1 a2 a3 a0 b0 | end --> |

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boost.regex doesn't implement character set complements?
by Robert Mathews 29 Jun '05

29 Jun '05

Hi: I was trying to write "Match everything *except* Bar". I wrote this: bool aResult = boost::regex_match(L"Foo", boost::wregex(L"[^(Bar)]")); This doesn't match. But if I wrote the same thing in Perl, it does work, ie: print "match\n" if( "Foo" =~ "[^(Bar)]"); It looks a lot like sets can't contain subexpressions in boost::regex ... is that really true? Is there some other way to write the same thing? Rob.

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Lambda and Borland C++
by Edson Tadeu 29 Jun '05

29 Jun '05

I've found a topic of 2 and a half years ago stating that the Lambda library was unusable in Borland C++. Now, in version 1.32.0, it continues unusable. The #inclusion of lambda.hpp itself triggers a lot of errors (nof_elems cannot be used without an object, etc...). There was a suggestion on using spirit/phoenix, but it also generates some errors in this compiler. So, my question again is: how to use Lambda functions or something equivalent in Borland C++? Thanks!

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Boost.Thread tss_cleanup_implemented question
by Simon Carter 29 Jun '05

29 Jun '05

I'm having some difficulty understanding what I need to implement in tss_cleanup_implemented when using boost.thread I'm using Windows Borland C++ Builder 6 (bcc32 v5.6.4) Roguewave stl Static (.lib) build of boost.thread In my project I #define BOOST_THREAD_USE_LIB My first problem was a pair of unresolved externals - this seems to happen occasionally with boost, bcb6 & roguewave. The missing definitions were boost::thread::thread(boost::function0<void>&) and boost::detail::tss::init(boost::function1<void, void *, std::allocator<boost::function_base> > *) I resolved these by forcing the compiler to generate the relevant code by #including the implementation definitions and creating a function which is never called so: #if (__BORLANDC__ >= 0x560) && defined(_USE_OLD_RW_STL) #include <boost/thread.hpp> #include <boost/thread/tss.hpp> #include <libs/thread/src/thread.cpp> #include <libs/thread/src/tss.cpp> void DummyFuncToGenerateTemplateSpecializations(void) { // This forces generation of // boost::thread::thread(boost::function0<void>&) boost::function0<void> A = NULL; boost::thread B(A); // This forces generation of // boost::detail::tss::init(boost::function1<void, void *, // std::allocator<boost::function_base> > *) // but has the consequence of requiring the deliberately undefined function // tss_cleanup_implemented boost::function1<void, void*>* C = NULL; boost::detail::tss D(C); } But this then causes a call to the deliberately undefined tss_cleanup_implemented so I get another unresolved external. I can't find any info on the sort of thing I need to implement in tss_cleanup_implemented. What should I be doing? Or I have gone wrong somewhere else? Thanks in anticipation Simon

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Boost string algorithms binary-safety
by Leon Mergen 29 Jun '05

29 Jun '05

Hello, I need to replace patterns in a string with contains (partially) binary data. Is it safe to use the Boost string algorithms for it ? I wasn't able to find anything about binary-safety of the string algorithms in the Boost documentation. Regards, Leon Mergen

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filesystem statistics
by Steve Hartmann 29 Jun '05

29 Jun '05

Hello all, I was browsing boost to find some portable means for getting file system statistics such as file system (disk) size, free space, etc. I kind of expected to see this in the boost filesystem library, but they don't appear to be there. Doesn't even seem to be in the "Do-list". Am I missing something? Looking in the wrong place? Thanks, Steve

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