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[variant] RTTI
by Michael Marcin 30 Jun '07

30 Jun '07

I need something similar to variant to optimize dynamic dispatches in my application much like what GIL uses. Unfortunately one of my target platforms does not support RTTI. How much does variant rely on the facilities of RTTI? Is it reasonable/possible to consider replacing RTTI to remove that dependency? I had to add a BOOST_NO_RTTI config macro locally several months ago in order to use lexical_cast. Perhaps RTTI could be used conditionally based on something similar. Thanks, Michael Marcin

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[config] Proposed new defect macro : BOOST_NO_IMPLICIT_BOOL_CONVERSION
by AlisdairM 30 Jun '07

30 Jun '07

Attached is the test file for a proposed new defect macro, BOOST_NO_IMPLICIT_BOOL_CONVERSION. This identifies compilers (such as Borland) that do not always convert expressions to bool as required by 5.14/5.15 and elsewhere. The workaround is fairly simple - detect the bad compiler and add an additional static_cast<bool>( ) around the (sub)expression. This only really catches classes relying on the convertible-to-unspecified-bool-type idiom. The test results I am posting have applied this workaround in a number of places, and obviously I would prefer to post those patches with a defect macro rather than compiler (and version) specific workarounds. Note: the tests checks all 'boolean contexts', not just the two or three that fail with Borland. I don't know if this will catch any other compilers. As ever, I am open to suggestions for a better name. -- AlisdairM

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[Getting started] Building with Mingwin/Cygwin without cygwin?
by John Maddock 30 Jun '07

30 Jun '07

In following up the attached message the cause appears to be a Boost.Build issue because specifying: bjam --toolset=gcc-nocygwin has no effect on the gcc command line, the generated command lines are simply: "g++" -ftemplate-depth-128 -O0 -fno-inline -Wall -g -mthreads -DBOOST_ALL_NO_LIB=1 -DBOOST_REGEX_DYN_LINK=1 -I"." -c -o "bin.v2\libs\regex\build\gcc-nocygwin\debug\threading-multi\cpp_regex_traits.o" "libs\regex\src\..\src\cpp_regex_traits.cpp" So there's no -mno-cygwin flag and the binaries are actually built for cygwin not mingw. At the same time there is no documented means of building with Mingw in the getting started guide: should there be? Cheers, John.

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[math_toolkit] ADL question
by Michael Marcin 30 Jun '07

30 Jun '07

Hello, I haven't looked much at the math toolkit yet but I was interested in how it handled errors so I peeked at common_error_handling.hpp I see it explicitly qualifies each all to isfinite with (boost::math::isfinite)( value ). I assume this is to prevent macro expansion however this means that if a UDT is passed in the user is required to add their isfinite to the boost::math namespace instead of having it be reachable through ADL. Is this intentional? I think the following would work if it's not. using boost::math::isfinite; isfinite BOOST_PREVENT_MACRO_SUBSTITUTION( value ); I'm not sure if UDT support for this library has been considered in its design but I'm working to provide a fixed-point math library that I hope can be used as a real type just like float and double. I would like to be able to keep as much as possible in the library's namespace. Thanks, Michael Marcin

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Acceptable Licenses for Boost-Doc SVG Icons
by Peter Foley 29 Jun '07

29 Jun '07

All, (I have cross-posted this to the Dev list as recently there had been some discussion over licensing and to ensure that this gets the appropriate visibility by interested people. If you respond to this post could you please move it to the boost-docs list.) To assist with the revamp of the look and feel for the Boost Documentation project (http://tinyurl.com/2uxfut) that Matias is currently spearheading I am trying to find SVG icons that are licensed under a Creative Commons style license (the icons I am currently recommending are specifically licensed under the "Create Commons Attribution Share-Alike license" http://tinyurl.com/aj2s6) >From reading through the archives and the recent thread about the current status of licensed code within Boost and reading the link off the boost home page for the Boost Software License (http://tinyurl.com/2xood5) It appears that the preference is for all code and documentation to be licensed under the BSL. Rather than risk proposing icons that are not licensed appropriately and then find that the license type was not acceptable I thought I would solicit feedback first. I have two questions for you to answer: The first question is: Would image files be "required to" or "the preference is" use the BSL. The second question is: If it was decided that it is only a preference. Would the above linked license (Creative Commons Attribution Share-Alike license) be acceptable to the boost community? Thanks, Peter. PS: Not that it is relevant if there is a requirement for the Icons to be licensed under the BSL we might need to find someone with some skill in creating icons (I don't have a graphical bone in my body =p)

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Fw: [rfc] I/O Library Design
by Scott Woods 29 Jun '07

29 Jun '07

> ----- Original Message ----- > From: "Sebastian Redl" <sebastian.redl(a)getdesigned.at> > To: <boost(a)lists.boost.org> > Sent: Monday, June 18, 2007 3:51 AM > Subject: [boost] [rfc] I/O Library Design > > [snip] > >> The document can be found here: >> http://windmuehlgasse.getdesigned.at/newio/ >> >> I'd especially like input on the unresolved issues, but all comments are >> welcome, even if you tell me that what I'm doing is completely pointless >> and misguided. (At least I'd know not to waste my time with refining and >> implementing the design. :-)) >> Hi Sebastien, Thanks for the read of your doc. On the basis of that and the quality of the related postings I think your efforts have already paid off. I made a couple of attempts to write a decent analysis of your design but they quickly became too detailed and not suitable for this mailing list. I suspect that my point of view also needs more work. Some of your open issues; * Basic Unit Small but ugly issue. My feelings are that non-8-bit-byte archictures need to be explicitly chopped out of the scope or a pure abstract "basic unit" (basun? like beson only more elusive :-) needs to be defined in a similar manner to a codepoint name. Its a strategic decision. Personally I would go for the 8-bit-only. * Async Requests All I/O is more cleanly considered to be async. A sync model of access can always be implemented over the top. * Putback Very contentious. Currently I am swinging towards "no". I have a rule for all of my encodings that each item has "positive termination" or in language processing terms "simple accepting states" * Representation/Endian I think this issue should be bundled with "parsing". Exactly what the ntohl functions do is a nice simple model for what should be done here. * Inexact bit counts Refer to "Basic Unit". * Buffer types and encodings Buffers typed to encodings? No. The only thing buffered will be blocks of basic units. * Interface (I/O streams-like needed?) Yes, if only because adding the backward compatibility should be easy given the design/impl goes well. Some general points; 1. Confusion around char, byte, text, binary, encoding and codepoint For me this has been a bit frustrating (its been untidy for a long time) and also illuminating (Unicode). For me there are bytes (or basic units) and items of application data. Everything in between is encoding. 2. Inclusion of "endianness" and "representation" in the binary layers. IIUC you are allowing applications to declare that they will only talk to (e.g. ) Motorola-based machines. I suppose this can be justified but from an engineering point of view the strategy implicit in ntohl is more appealing. The subtle drawback of allowing the declaration of endianness and the fact that underlying operations (e.g. network nagling) shaft it anyhow makes it a "no go" for me. 3. Lack of extensibility While your design doesnt actually preclude this, it also isnt explicit about it being possible, i.e. how would you redo your diagram for an application that is using different encodings over different network connections and to data files. Cheers, Scott

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Boost inspection notification (2007-06-29/RC_1_34_0) *LC*
by Rene Rivera 29 Jun '07

29 Jun '07

Boost Inspection Report Run Date: 16:06:30 UTC, Friday 29 June 2007 An inspection program <http://www.boost.org/tools/inspect/index.html> checks each file in the current Boost CVS for various problems, generating this as output. Problems detected include tabs in files, missing copyrights, broken URL's, and similar misdemeanors. Totals: 11452 files scanned 909 directories scanned (including root) 1059 problems reported Problem counts: 661 files missing Boost license info or having wrong reference text 398 files missing copyright notice Summary: any (1) archive (1) build (68) concept_check (22) conversion (5) doc (1) filesystem (2) function (1) graph (1) inspect (1) integer (9) lambda (10) libs (6) logic (2) math (1) more (13) mpl (417) multi_array (13) numeric (188) optional (1) people (4) program_options (35) property_map (15) ptr_container (8) python (14) rational (5) regex (4) regression (118) release (2) serialization (16) signals (2) smart_ptr (8) test (3) timer (1) tr1 (2) tuple (5) utility (12) variant (42) Details: *L* missing Boost license info, or wrong reference text *C* missing copyright notice |any| libs/any/doc/ any.xml: *L* |archive| boost/archive/detail/ utf8_codecvt_facet.hpp: *L* |build| tools/build/v2/build/ build-request.jam: *L* modifiers.jam: *L* tools/build/v2/doc/ Jamfile.v2: *C* *L* 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*L* check_existance.py: *C* *L* checked_system.py: *C* *L* libxslt.py: *C* *L* log.py: *C* *L* makedirs.py: *C* *L* send_mail.py: *C* *L* sourceforge.py: *C* *L* tar.py: *C* *L* zip.py: *C* *L* tools/regression/xsl_reports/xsl/v2/ expected_to_1_33_format.xsl: *C* *L* |release| tools/release/ utils.py: *C* *L* |serialization| libs/serialization/doc/ style.css: *C* *L* libs/serialization/example/ demo_output.txt: *C* *L* demo_save.xml: *C* *L* demofile.txt: *C* *L* libs/serialization/test/ run_archive_test.bat: *C* *L* runtest.bat: *C* *L* runtest.sh: *C* *L* libs/serialization/vc7ide/ readme.txt: *C* *L* |signals| libs/signals/doc/ tutorial.xml: *C* *L* |smart_ptr| libs/smart_ptr/ compatibility.htm: *L* scoped_array.htm: *L* scoped_ptr.htm: *L* shared_array.htm: *L* shared_ptr.htm: *L* smart_ptr.htm: *L* smarttests.htm: *L* weak_ptr.htm: *L* |test| boost/test/utils/runtime/cla/detail/ argument_value_usage.hpp: *L* libs/test/test/auto-link-test/ run_bjam.bat: *C* *L* |timer| libs/timer/ 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1 0

Boost inspection notification (2007-06-29/RC_1_34_0) *X*
by Rene Rivera 29 Jun '07

29 Jun '07

Boost Inspection Report Run Date: 16:06:23 UTC, Friday 29 June 2007 An inspection program <http://www.boost.org/tools/inspect/index.html> checks each file in the current Boost CVS for various problems, generating this as output. Problems detected include tabs in files, missing copyrights, broken URL's, and similar misdemeanors. Totals: 11452 files scanned 909 directories scanned (including root) 165 problems reported Problem counts: 0 files with invalid line endings 0 bookmarks with invalid characters 3 invalid urls 70 broken links 24 unlinked files 22 file/directory names issues 2 files with tabs 9 violations of the Boost min/max guidelines 35 usages of unnamed namespaces in headers (including .ipp files) Summary: archive (3) bind (1) build (1) date_time (1) doc (3) filesystem (3) graph (3) iostreams (2) lambda (3) math (8) more (4) mpl (4) multi_array (2) ptr_container (1) python (8) regex (1) regression (32) serialization (1) smart_ptr (2) test (81) type_traits (1) Details: *R* invalid (cr only) line-ending *A* invalid bookmarks, invalid urls, broken links, unlinked files *N* file/directory names issues *T* tabs in file *M* uses of min or max that have not been protected from the min/max macros, or unallowed #undef-s *U* unnamed namespace in header |archive| boost/archive/basic_streambuf_locale_saver.hpp: *N* name exceeds 31 characters boost/archive/impl/xml_wiarchive_impl.ipp: *U* unnamed namespace at line 53 boost/archive/iterators/remove_whitespace.hpp: *U* unnamed namespace at line 57 |bind| boost/bind/placeholders.hpp: *U* unnamed namespace at line 25 |build| tools/build/v2/test/test_system.html: *A* unlinked file |date_time| libs/date_time/xmldoc/date_time_docs_howto.html: *A* unlinked file |doc| doc/html/boost_math/inverse_complex.html: *A* unlinked file doc/html/jam.html: *A* unlinked file doc/html/typeof.html: *A* unlinked file |filesystem| libs/filesystem/doc/do-list.htm: *A* invalid URL (hardwired file): file://?/ *A* invalid URL (hardwired file): file://?/UNC/ libs/filesystem/doc/tr2_proposal.html: *A* invalid URL (hardwired file): file:///C|/boost/site/libs/filesystem/doc/operations.htm#complete_note |graph| boost/graph/relax.hpp: *T* libs/graph/example/file_dependencies.cpp: *M* violation of Boost min/max guidelines on line 139 libs/graph/test/serialize.cpp: *T* |iostreams| libs/iostreams/doc/concepts/multi-character.html: *A* unlinked file libs/iostreams/doc/installation.html: *A* broken link: ../../../tools/build/v1/build_system.htm |lambda| boost/lambda/core.hpp: *U* unnamed namespace at line 62 boost/lambda/detail/lambda_functors.hpp: *U* unnamed namespace at line 25 boost/lambda/exceptions.hpp: *U* unnamed namespace at line 24 |math| libs/math/test/common_factor_test.cpp: *M* violation of Boost min/max guidelines on line 146 *M* violation of Boost min/max guidelines on line 147 *M* violation of Boost min/max guidelines on line 193 *M* violation of Boost min/max guidelines on line 194 |more| more/cvs.html: *A* unlinked file more/getting_started/unix-variants.html: *A* broken link: ../../doc/html/thread/build.html#thread.build more/getting_started/windows.html: *A* broken link: ../../doc/html/thread/build.html#thread.build more/separate_compilation.html: *A* broken link: ../libs/config/test/link/test/Jamfile.v2 |mpl| boost/mpl/alias.hpp: *U* unnamed namespace at line 17 libs/mpl/doc/refmanual/for-each.html: *A* broken link: ./value-initialized.html |multi_array| boost/multi_array/base.hpp: *U* unnamed namespace at line 69 libs/multi_array/test/generative_tests.hpp: *U* unnamed namespace at line 57 |ptr_container| libs/ptr_container/doc/tutorial_example.html: *A* unlinked file |python| libs/python/doc/building.html: *A* broken link: ../index.htm libs/python/doc/tutorial/doc/html/python/hello.html: *A* broken link: ../../../../../example/tutorial/Jamrules libs/python/doc/tutorial/index.html: *A* broken link: ../../../LICENSE_1_0.txt libs/python/doc/v2/May2002.html: *A* broken link: ../../../../tools/build/v1/build_system.htm *A* broken link: ../../../../tools/build/v1/gen_aix_import_file.py libs/python/doc/v2/faq.html: *A* broken link: ../../../../tools/build/v1/build_system.htm |regex| libs/regex/performance/input.html: *A* unlinked file |regression| regression/.htaccess: *N* leading character of ".htaccess" is not alphabetic tools/regression/test/test-cases/incremental/bjam.log.1: *N* name contains more than one dot character ('.') tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/compile-fail.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/completed.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/compile-fail.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/completed.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/lib.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/misfire.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/no-run.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/run_pyd.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/expected/test-case.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/test-case.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_is_test_log_complete/test-driver.xsl: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_re_match/expected/test_re_match.xml: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ tools/regression/xsl_reports/test/test-components/test_test_case_status/explicit-failures-markup.xml.test: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ *N* name contains more than one dot character ('.') *N* name exceeds 31 characters tools/regression/xsl_reports/test/test-components/test_test_structure/explicit-failures-markup.xml.test: *N* file path will exceed 100 characters in a directory tree with a root of the form boost_X_XX_X/ *N* name contains more than one dot 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[Report] 1 regressions on RC_1_34_0 (2007-06-29)
by Douglas Gregor 29 Jun '07

29 Jun '07

Boost Regression test failures Report time: 2007-06-29T04:45:12Z This report lists all regression test failures on release platforms. Detailed report: http://engineering.meta-comm.com/boost-regression/CVS-RC_1_34_0/developer/i… 1 failures in 1 libraries serialization (1) |serialization| test_list_xml_warchive_dll: msvc-8.0

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[xpressive] wide character blank not matching properly
by Jean-Francois Bastien 29 Jun '07

29 Jun '07

It seems that xpressive's blank isn't matched properly to a space when used with wide strings. Here is a short example: #include <boost/xpressive/xpressive_static.hpp> #include <string> #include <iostream> #if 1 // 1 for wide character, 0 for normal. # define REGEX_TYPE boost::xpressive::wsregex # define REGEX_ITER_TYPE boost::xpressive::wsregex_iterator # define REGEX_MATCH_TYPE boost::xpressive::wsmatch # define STR_TYPE std::wstring # define STREAM_TYPE std::wcout # define STR(s) L##s #else # define REGEX_TYPE boost::xpressive::sregex # define REGEX_ITER_TYPE boost::xpressive::sregex_iterator # define REGEX_MATCH_TYPE boost::xpressive::smatch # define STR_TYPE std::string # define STREAM_TYPE std::cout # define STR(s) s #endif int main() { using namespace boost::xpressive; REGEX_TYPE expr = ( s1= ( STR("something") >> +( (*blank >> +alpha) ) ) ) ; STR_TYPE strings[] = { STR("something"), STR("something "), STR("somethingelse"), STR("something else") }; const int numStrings(sizeof(strings) / sizeof(strings[0])); for(int i(0); numStrings != i; ++i) { const STR_TYPE & s(strings[i]); STREAM_TYPE << "String \"" << s << "\":" << std::endl; for(REGEX_ITER_TYPE current(s.begin(), s.end(), expr), end; current != end; ++current) { const REGEX_MATCH_TYPE & what(*current); const STR_TYPE match(what[1]); STREAM_TYPE << "\t" << match << std::endl; } } return 0; } I would expect the last string to match (as it does with simple characters) but it doesn't. Using space instead, or using (set= STR(' '),STR('\t')) seems to work in both cases. I'm using MSVC 2005 SP1. I'm not sure if the problem is in the compiler's char traits and how blank uses them (if it does) or somewhere in the bowels of xpressive. Thanks, JF

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