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Getters vs. constant members
by Julio M. Merino Vidal 27 Mar '07

27 Mar '07

Hello, [ I'm not sure this really belongs to this list (as opposed to some C+ + generic list), but as it is related to some comments I received a while ago from this list, I'm posting it here. ] Back when I presented Boost.Process 0.1 past year, I used getters for all class members that had to be exposed to the library user. However, some reviewers commented that it was "ugly" to provide getters that just returned a member's value. I tried to change most of those instances to constant members that could be queried directly, but I still have doubts whether that was the correct way to go. Here are my reasons supporting getters: - The getter method can do some sanity checks before returning a value. Sometimes these checks can be avoided by redesigning the class to make the value directly "query-able", but sometimes not. - It is sometimes hard, if not impossible, to implement a constant member. I don't remember the exact situation I hit, but when trying to do the conversion, I could not copy-construct some class because its members were constant. - As sometimes getters cannot be avoided, using them in all scenarios makes the interface more consistent. - I've always been taught that exposing a class' internals is BAD-BAD- BAD! ;-) - And my preferred item: If the class' internals ever change, one can adapt the getters' code to return the appropriate values. Which means the API is not broken. However, constant members may be preferred because: - The getter is overall suppressed, thus removing a level of indirection. - Err, what else? Most of the work of converting getters to constant members was already done in the Subversion repository, but there still are some methods that were not converted. Before switching these, I'd like to reach a conclusion whether this is the way to go or not. Thank you. PS: Yes, I'm trying to continue the work on my SoC 2006 library. I won't have too much time in the short term for this task, but resolving some of the serious issues as soon as possible could benefit all people interested in it. -- Julio M. Merino Vidal <jmmv84(a)gmail.com>

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wave lexed_tokens sample has a lexing error on an empty file
by Leo Davis 27 Mar '07

27 Mar '07

Hello, I pulled down a copy of boost 1.34 from CVS today and built the lexed_tokens sample. It seemed to work well, except for running it on an empty file: $./lexed_tokens bar.c bar.c(1): error: generic lexing error: invalid character '\000' in input stream $ This used to work in boost 1.33.1: $ ./lexed_tokens bar.c EOF (#402) at bar.c ( 1/ 1): >< $ Leo

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Boost inspection notification (2007-03-27/RC_1_34_0) *LC*
by Rene Rivera 27 Mar '07

27 Mar '07

Boost Inspection Report Run Date: 16:08:30 UTC, Tuesday 27 March 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: 11447 files scanned 908 directories scanned (including root) 1053 problems reported Problem counts: 654 files missing Boost license info or having wrong reference text 399 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 (419) multi_array (13) numeric (188) optional (1) people (4) program_options (35) property_map (15) ptr_container (8) python (6) 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* 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/ timer.htm: *L* |tr1| boost/tr1/ tuple.hpp: *C* *L* |tuple| libs/tuple/doc/ design_decisions_rationale.html: *L* tuple_advanced_interface.html: *L* 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Boost inspection notification (2007-03-27/RC_1_34_0) *X*
by Rene Rivera 27 Mar '07

27 Mar '07

Boost Inspection Report Run Date: 16:08:23 UTC, Tuesday 27 March 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: 11447 files scanned 908 directories scanned (including root) 196 problems reported Problem counts: 1 files with invalid line endings 0 bookmarks with invalid characters 3 invalid urls 104 broken links 21 unlinked files 22 file/directory names issues 1 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) boost-root (3) build (2) date_time (1) doc (2) filesystem (37) graph (2) iostreams (3) lambda (3) math (8) more (1) mpl (1) multi_array (2) ptr_container (1) python (10) regex (1) regression (32) serialization (1) 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 |boost-root| index.htm: *A* broken link: doc/hmtl/date_time.html *A* broken link: doc/hmtl/date_time/details.html#changes *A* broken link: more/BoostCon07.html |build| tools/build/v2/test/test_system.html: *A* unlinked file tools/build/v2/tools/python.jam: *R* |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 |filesystem| libs/filesystem/doc/do-list.htm: *A* invalid URL (hardwired file): file://?/ *A* invalid URL (hardwired file): file://?/UNC/ libs/filesystem/doc/i18n.html: *A* broken link: convenience.htm#basic_recursive_directory_iterator *A* broken link: exception.htm *A* broken link: operations.htm *A* broken link: operations.htm#Do-the-right-thing *A* broken link: operations.htm#is_directory *A* broken link: operations.htm#is_file *A* broken link: operations.htm#status libs/filesystem/doc/index.htm: *A* broken link: ../build/Jamfile *A* broken link: convenience.htm *A* broken link: fstream.htm *A* broken link: operations.htm#create_directory *A* broken link: operations.htm#create_hard_link *A* broken link: operations.htm#current_path *A* broken link: operations.htm#directory_iterator *A* broken link: operations.htm#equivalent *A* broken link: operations.htm#file_size *A* broken link: operations.htm#initial_path *A* broken link: operations.htm#is_file *A* broken link: operations.htm#is_symlink *A* broken link: operations.htm#status *A* broken link: operations.htm#symlink_status *A* broken link: path.htm#Canonical *A* broken link: path.htm#Grammar *A* broken link: path.htm#Normalized *A* broken link: path.htm#default_name_check *A* broken link: path.htm#name_check_mechanism *A* broken link: path.htm#normalize *A* broken link: path.htm#operator_eq *A* broken link: path.htm#synopsis libs/filesystem/doc/portability_guide.htm: *A* broken link: path.htm#name_check_typedef libs/filesystem/doc/tr2_proposal.html: *A* invalid URL (hardwired file): file:///C|/boost/site/libs/filesystem/doc/operations.htm#complete_note |graph| 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/acknowledgments.html: *A* unlinked file 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/separate_compilation.html: *A* broken link: ../libs/config/test/link/test/Jamfile.v2 |mpl| boost/mpl/alias.hpp: *U* unnamed namespace at line 17 |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: ../../../tools/build/v1/build_system.htm *A* broken link: ../../../tools/build/v1/build_system.htm#user_globals *A* broken link: ../../../tools/build/v1/build_system.htm#variants 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 character ('.') *N* name exceeds 31 characters tools/regression/xsl_reports/xsl/html/issues_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/library_developer_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/library_user_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/make_tinyurl.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/summary_developer_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/html/summary_user_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/v2/html/issues_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/v2/html/library_developer_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/v2/html/library_user_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/v2/html/make_tinyurl.html: *A* unlinked file tools/regression/xsl_reports/xsl/v2/html/summary_developer_legend.html: *A* unlinked file tools/regression/xsl_reports/xsl/v2/html/summary_user_legend.html: *A* unlinked file |serialization| libs/serialization/src/basic_xml_grammar.ipp: *U* unnamed namespace at line 43 |test| boost/test/floating_point_comparison.hpp: *U* unnamed namespace at line 206 *U* unnamed namespace at line 228 boost/test/impl/cpp_main.ipp: *U* unnamed namespace at line 42 boost/test/impl/exception_safety.ipp: *U* unnamed namespace at line 400 boost/test/impl/framework.ipp: *U* unnamed namespace at line 199 boost/test/impl/plain_report_formatter.ipp: *U* unnamed namespace at line 45 boost/test/impl/progress_monitor.ipp: *U* unnamed namespace at line 38 boost/test/impl/results_collector.ipp: *U* unnamed namespace at line 106 boost/test/impl/results_reporter.ipp: *U* unnamed namespace at line 48 boost/test/impl/unit_test_log.ipp: *U* unnamed namespace at line 79 boost/test/impl/unit_test_monitor.ipp: *U* unnamed namespace at line 35 boost/test/impl/unit_test_parameters.ipp: *U* unnamed namespace at line 50 boost/test/results_collector.hpp: *U* unnamed namespace at line 40 boost/test/test_tools.hpp: *U* unnamed namespace at line 262 boost/test/utils/iterator/token_iterator.hpp: *U* unnamed namespace at line 166 boost/test/utils/named_params.hpp: *U* unnamed namespace at line 216 boost/test/utils/runtime/cla/dual_name_parameter.ipp: *U* unnamed namespace at line 43 boost/test/utils/runtime/cla/modifier.hpp: *U* unnamed namespace at line 34 boost/test/utils/runtime/env/modifier.hpp: *U* unnamed namespace at line 34 boost/test/utils/runtime/file/config_file.hpp: *U* unnamed namespace at line 169 *U* unnamed namespace at line 64 *U* unnamed namespace at line 74 boost/test/utils/runtime/file/config_file_iterator.hpp: *U* unnamed namespace at line 68 boost/test/utils/trivial_singleton.hpp: *U* unnamed namespace at line 52 *U* unnamed namespace at line 61 libs/test/build/msvc71_proj/config_file_iterator_test.vcproj: *N* name exceeds 31 characters libs/test/doc/components/prg_exec_monitor/compilation.html: *A* broken link: ../../../build/Jamfile libs/test/doc/components/prg_exec_monitor/index.html: *A* broken link: ../../../../../boost/test/cpp_main.hpp libs/test/doc/components/test_tools/index.html: *A* broken link: ../../tests/boost_check_equal_str.html libs/test/doc/components/test_tools/reference/BOOST_CHECK_CLOSE.html: *A* broken link: BOOST_CHECK_CLOSE_FRACTION.html libs/test/doc/components/test_tools/reference/BOOST_CHECK_MESSAGE.html: *A* broken link: 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1 0

[Report] 32 regressions on RC_1_34_0 (2007-03-27)
by Douglas Gregor 27 Mar '07

27 Mar '07

Boost Regression test failures Report time: 2007-03-27T06:12:19Z 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… 32 failures in 4 libraries date_time (1) optional (4) parameter (4) python (23) |date_time| testmicrosec_time_clock: borland-5.8.2 |optional| optional_test: msvc-6.5 msvc-6.5 msvc-6.5_stlport4 msvc-7.0 |parameter| python_test: gcc-3.4.5_linux gcc-4.0.3_linux gcc-4.1.0_linux gcc-cygwin-3.4.4 |python| bases: gcc-4.1.1_sunos_i86pc exec: gcc-4.1.1_sunos_i86pc exec-dynamic: gcc-4.1.1_sunos_i86pc extract: gcc-3.4.5_linux gcc-4.0.3_linux gcc-4.1.0_linux import_: msvc-7.1 msvc-8.0 list: gcc-3.4.5_linux gcc-4.0.3_linux gcc-4.1.0_linux pickle1: gcc-3.4.5_linux gcc-4.0.3_linux gcc-4.1.0_linux pickle2: gcc-3.4.5_linux gcc-4.0.3_linux gcc-4.1.0_linux pickle3: gcc-3.4.5_linux gcc-4.0.3_linux gcc-4.1.0_linux pointee: gcc-4.1.1_sunos_i86pc pointer_type_id_test: gcc-4.1.1_sunos_i86pc upcast: gcc-4.1.1_sunos_i86pc

1 0

GSOC 2007: Thank you for your ideas
by Kasun Rodrigo 27 Mar '07

27 Mar '07

I submitted my GSOC proposal for "Plotting Graphs from C++ Containers & Functions". The ideas I got from the Boost community through this mailing list was very helpful to prepare the proposal. Thank you for all your support and guidance. I seek your guidance in the future too. Kasun

1 0

Boost.Threads, N2178, N2184, et al
by Peter Dimov 27 Mar '07

27 Mar '07

Hello everyone, I'd like to start working on a Boost implementation of my threading proposal N2178: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2178.html but, as you'll see if you take a look at it, it differs from the current Boost.Threads and Howard Hinnant's competing N2184 in a number of important places, and having two competing libraries in Boost that do the same thing may not be a good idea. So what would be the best way to proceed?

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Please Upload circular_buffer_v3.7.tar.gz
by big one 27 Mar '07

27 Mar '07

Hi I try to build Avisynth 3.0 and the program need "circular_buffer_v3.7.tar.gz". There is a file called: "circullar_buffer.hpp" that no longer exist on the sandbox at sourceforge.net. http://avisynth3.unite-video.com/ There was an old version (v3.6) on Yahoogroups, but the file was removed. Can someone upload the correct version (v3.7) to yahoo groups or FTP? Thank you. _____________________________________________________________ = You want FREE web-based email ? = You want your own @qon.lao.net address?? = Then you want LaoNet's WebMail ! = Get it at http://webmail.lao.net !!

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Re: [boost] [Review] Quantitative Units library review begins today March 26
by Steven Watanabe 27 Mar '07

27 Mar '07

AMDG Deane Yang wrote: > Zach Laine wrote: > >> > >> > Specifically, >> > >> > quantity<force> F(2.0*newton); >> > quantity<length> dx(2.0*meter); >> > F.value() = dx.value(); >> > >> > is an abomination and should be impossible. If I really want to do >> > this, why not make me go through the constructor, so that attention is >> > more obviously called to what I'm doing? I could also live with using >> > a purposely ugly cast here, but since quantity_cast() has some >> > perfectly legitimate and safe uses, I would much prefer a different >> > syntax that draws attention to this unsafe act, such as >> > quantity_reinterpret_cast(). >> > I agree completely with Zach's views on this. It's OK to have a const > member function .value() but not a mutating one. >> > >> > I and a lot of other users badly need support for Imperial units. As >> > it stands now, we will each be required to write nearly identical code >> > to do so. This should be included in the library. >> > >> > Matthias Schabel wrote: > > > > The problem with these non-standard units is that they don't really > > form a > > well-defined unit system. ... > > We have, however, supplied a number of examples of how to > > roll your own unit system... > > ) > > I agree with Zach and also want to be able to define units without > having to "roll my own unit system". I have contemplated something along the lines of //this is what you need to do already //to get feet struct foot_tag {}; template<> struct unit_info<length_tag, foot_tag> { static const char* name() { return("foot") } static const char* symbol() { return("ft") } }; //converting feet to meters template<> struct base_unit_converter<length_tag, foot_tag, SI::system_tag> { typedef double type; static type value() { return(...) } }; //converting meters to feet template<> struct base_unit_converter<length_tag, SI::system_tag, foot_tag> { typedef double type; static type value() { return(...) } }; Now feet are defined independently of other base units and can be easily combined with any other set of units: typedef make_system< mpl::map< mpl::pair<length_tag, foot_tag>, mpl::pair<mass_tag, SI::system_tag>, mpl::pair<time_tag, SI::system_tag> > >::type FKS_system; (feet-kilograms-seconds) From an implementation standpoint the only difficulty is in making a mixed system such as inches * miles / furlongs work without ending up with a mess. In Christ, Steven Watanabe

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boost regex with ICU issue on OS X
by Tommy McClung 27 Mar '07

27 Mar '07

Here's my situation. We've got some software that makes use of the boost regex libraries and we've compiled and linked with the ICU libraries enabled. We need this for utf-8 support. Our platforms are Windows (XP and Vista) and OS X. I have a regular expression that is parsing an html page that is utf-8 encoded and it's a rather complex expression, but I've made sure to add anchors such that I don't run into catastrophic backtraking. Another note, I'm using u32regex_search and my flags are match_default | match_partial. I have to use match_partial because the input data is long and I've seen memory exhausted even when I've increased BOOST_REGEX_MAX_BLOCKS (I probably have more work to do on the expression to reduce the complexity). On Windows I have no problems. Partial matches are returned and I eventually get full matches and my code runs great. On OS X, u32regex_search returns and indicates it has found a partial match (what[0].match == false). But what[0].second is set to the end of my input string, so no further matching takes place and my loop ends. This is very different behavior than what I'm seeing on Windows. I know this email is vague, but I can provide any details that would be helpful in solving this issue. Why the difference between Windows and OS X, I've compiled both boost libraries with the same compiler options on both platforms? Is it an ICU compile issue? Thanks, Tommy McClung IMSafer, Inc. Founder tmcclung(a)imsafer.com

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