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[serialization] add_facet question
by Jonathan Turkanis 04 Feb '05

04 Feb '05

Hi Robert, I'd like to use add_facet from serialization in the iostreams library, but I don't understand why the generated locale is dynamically allocated. It would seem be more reusable to declare it as follows: template<typename Facet> inline std::locale add_facet(const std::locale& loc, Facet* facet); If you need a dynamically allocated locale, you could write new std::locale(add_facet(loc, facet)) Jonathan

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Re: [boost] Re: Two alined_storage classes in the CVS
by JOAQUIN LOPEZ MU?Z 04 Feb '05

04 Feb '05

----- Mensaje original ----- De: Robert Ramey <ramey(a)rrsd.com> Fecha: Jueves, Febrero 3, 2005 9:51 pm Asunto: [boost] Re: Two alined_storage classes in the CVS > Since these are in different namespaces, can this not be just > ignored? Is > it worth spending any time on? > Hi Robert, I'm afraid both classes live directly in namespace boost. Joaquín M López Muñoz Telefónica, Investigación y Desarollo

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Gauging Interest: New Functional Library and Programming Language
by christopher diggins 03 Feb '05

03 Feb '05

I have just completed a prototype for a functional programming language called Unimperative, which is also valid C++. This language is implemented in C++ by overloading the comma operator and use of the boost::any library. The language syntax is similar to Scheme but with the significant difference that a Function is called as (MyFxn, x, y). For instance where in Scheme you might write a factorial function as: (define factorial (lambda (n) (if (zero? n) 1 (* n (fact (- n 1)))))) In Unimperative you could write it as: Function Factorial = (If, (Eq, _1, 0), 1, (Mult, _1, (Eval, self, (Dec, _1)))); You can also write procedural code in Unimperative Function F = (Proc, (Output, 1), (Output, 2), (Output, 3), End); I have written a bit more on the language and provided some code examples at http://lambda-the-ultimate.org/node/view/512 . Well anyway, my question to the group, is whether there is some potential interest in this kind of library, and to find out if anyone wants to collaborate. Also, any suggestions on the kinds of features that would make this language/library more interesting to users and/or the boost community? Thanks in advance. Christopher Diggins Object Oriented Template Library (OOTL) http://www.ootl.org

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boost::basic_wrap_stringstream SIGBBUS with SunPRO
by Caleb Epstein 03 Feb '05

03 Feb '05

I'm running into numerous examples of the regression test programs hanging/crashing today due to what may be a problem with basic_wrap_stringstream. Here's an example: /home/nbde52d/src/boost-regression/results/bin/boost/libs/assign/test/my_vector_example.test/sunpro-5_3/debug/my_vector_example --log_level=all Running 1 test case... Entering test suite "List Test Suite" Entering test case "check_list_inserter" ../libs/assign/test/my_vector_example.cpp(98): info: test vec.size() == 10u passed. Exception in "check_list_inserter": signal: memory access violation /home/nbde52d/src/boost-regression/boost/boost/test/impl/unit_test_suite.ipp(179): fatal error in "check_list_inserter": Testing aborted Leaving test case "check_list_inserter" Leaving test suite "List Test Suite" *** errors detected in test suite "List Test Suite"; see standard output for details Here's a stack trace from dbx (same program): (/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx) run Running: my_vector_example (process id 10116) Running 1 test case... signal SEGV (no mapping at the fault address) in _free_unlocked at 0x7fa42bbc 0x7fa42bbc: _free_unlocked+0x0040: ld [%i0 - 0x8], %o0 Current function is boost::test_tools::predicate_result::~predicate_result 47 ~predicate_result() { delete m_message; } (/opt/SUNWspro/bin/../WS6U2/bin/sparcv9/dbx) where [1] _free_unlocked(0x2000, 0x7fabc008, 0x2000, 0x7fabc008, 0x22310, 0x7fa42b64 ), at 0x7fa42bbc [2] free(0x2000, 0x5, 0x5, 0x7fabc008, 0x22310, 0x7fa42b64), at 0x7fa42b6c [3] operator delete(0x2000, 0x7fabc008, 0x0, 0x7fabc008, 0x22310, 0x7fa42b64), at 0x7fb46260 [4] std::basic_stringbuf<char,std::char_traits<char>,std::allocator<char> >::~ basic_stringbuf(0xffbedb60, 0xffbed7b0, 0x34a68, 0x2, 0x222e8, 0x7fb46260), at 0 x71630 [5] std::basic_ostringstream<char,std::char_traits<char>,std::allocator<char> >::~basic_ostringstream(0xffbedb58, 0xffffffff, 0x60, 0xa1768, 0x220b8, 0x4d774) , at 0x66450 [6] boost::basic_wrap_stringstream<char>::~basic_wrap_stringstream(0xffbedb58, 0xa0034, 0xa11bc, 0xffbed838, 0x2f8, 0xa1490), at 0x38250 =>[7] boost::test_tools::predicate_result::~predicate_result(this = 0xffbed88c), line 47 in "predicate_result.hpp" [8] check_list_inserter(), line 98 in "my_vector_example.cpp" [9] boost::unit_test::function_test_case::do_run(this = 0xab248), line 138 in "unit_test_suite.hpp" [10] boost::unit_test::ut_detail::unit_test_monitor::function(this = 0xa0a10), line 79 in "unit_test_monitor.ipp" [11] boost::execution_monitor::run_function(this = 0xa0a10), line 197 in "exec ution_monitor.ipp" [12] boost::detail::catch_signals(exmon = CLASS, catch_system_errors = true, t imeout = 0), line 418 in "execution_monitor.ipp" [13] boost::execution_monitor::execute(this = 0xa0a10, catch_system_errors = t rue, timeout = 0), line 223 in "execution_monitor.ipp" [14] boost::unit_test::ut_detail::unit_test_monitor::execute_and_translate(thi s = 0xa0a10, target_test_case = 0xab248, f = 0xffbee024, timeout = 0), line 46 i n "unit_test_monitor.ipp" [15] boost::unit_test::test_case::run(this = 0xab248), line 173 in "unit_test_ suite.ipp" [16] boost::unit_test::test_suite::do_run(this = 0xab168), line 277 in "unit_t est_suite.ipp" [17] boost::unit_test::test_case::run(this = 0xab168), line 186 in "unit_test_ suite.ipp" [18] main(argc = 1, argv = 0xffbee4dc), line 84 in "unit_test_main.ipp" -- Caleb Epstein caleb dot epstein at gmail dot com

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BIL and boost::any
by christopher diggins 03 Feb '05

03 Feb '05

Hello all, I just realized that an empty BIL interface, BOOST_IDL_BEGIN(IAnything) BOOST_IDL_EMPTY(IAnything) has some common ground with: boost::any Where boost::any stores a copy of a value of practical any type for later extraction, IAnything can point to just about anything. void BoostAnyTest() { int x = 5; boost::any a = x; TEST(any_cast<int>(a) == 5); } void AnythingTest() { int x = 5; IAnything a = x; TEST(extract<int>(a) == 5); } void ObjectTests() { BoostAnyTest(); AnythingTest(); } I just thought this could lead to some kind of connection between the libraries. It might be nice to see this in the boost::any namespace, i.e. a boost::any::any_ref. Christopher Diggins Object Oriented Template Library (OOTL) http://www.ootl.org

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is_incrementable fixes for VC6
by Jonathan Turkanis 03 Feb '05

03 Feb '05

Hi, I've encountered some compile errors using is_incrementable with VC6. They can be fixed by fully qualifying remove_cv and by using macros from type traits to define the traits is_incrementable and is_postfix_incrementable: # include <boost/type_traits/detail/bool_trait_def.hpp> .... // Local macro, #undef'd below # define BOOST_DETAIL_BOOL_TRAIT_DEF1(trait,T,C) \ template< typename T > struct trait \ BOOST_TT_AUX_BOOL_C_BASE(C) \ { \ BOOST_TT_AUX_BOOL_TRAIT_VALUE_DECL(C) \ }; \ /**/ BOOST_DETAIL_BOOL_TRAIT_DEF1(is_incrementable, T, ::boost::detail::is_incrementable_::impl<T>::value) BOOST_DETAIL_BOOL_TRAIT_DEF1(is_postfix_incrementable, T, ::boost::detail::is_incrementable_::postfix_impl<T>::value) # undef BOOST_DETAIL_BOOL_TRAIT_DEF1 Can I go ahead and add this stuff? Also, should I put in lambda and template arity support? Other options would be: * add a header detail/bool_trait_def.hpp for defining traits in namespace detail. * write a macro for generating traits like is_incrementable Jonathan

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[Boost-bugs] [ boost-Patches-1115576 ] Patch 1.32 IRIX MIPSPro 7.4.1 [Test Bind Program Options]
by SourceForge.net 03 Feb '05

03 Feb '05

Patches item #1115576, was opened at 2005-02-03 17:15 Message generated for change (Tracker Item Submitted) made by Item Submitter You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=307586&aid=1115576&group_… Category: None Group: None Status: Open Resolution: None Priority: 5 Submitted By: hxpro (hxpro) Assigned to: Nobody/Anonymous (nobody) Summary: Patch 1.32 IRIX MIPSPro 7.4.1 [Test Bind Program Options] Initial Comment: Some simple fixes to make the build work... ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=307586&aid=1115576&group_… ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ Boost-bugs mailing list Boost-bugs(a)lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/boost-bugs

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BOOST_PP_EXPR_IF Behavior
by John Eddy 03 Feb '05

03 Feb '05

I am not terribly familiar with the rules of the preprocessor. Is it the case that the expression of the BOOST_PP_EXPR_IF macro is expanded regardless of the resulting value of the condition? The reason I ask is because the following code produces a warning with VC7 .NET 2003. #define MY_MACRO(array) \ BOOST_PP_EXPR_IF( \ BOOST_PP_ARRAY_SIZE(array), \ BOOST_PP_TUPLE_TO_SEQ( \ BOOST_PP_ARRAY_SIZE(array), \ BOOST_PP_ARRAY_DATA(array) \ ) \ ) MY_MACRO((0, ())); The warning is: C4003: not enough actual parameters for macro 'BOOST_PP_EXPR_IIF_0' The macro expands correctly. Perhaps there is a better way to do what I am after. I would like to create a comma separated list (no parenthesis as would be the case if I only took the array data) from a possibly empty set. Thanks, John

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allocator_utilites: problems with VC6
by Jonathan Turkanis 03 Feb '05

03 Feb '05

Hi, I'm trying to use allocator_utilities with VC6 in the following manner: template<typename Alloc> struct bzip2_allocator_traits { typedef typename boost::detail::allocator::rebind_to< Alloc, char >::type type; }; template< typename Alloc, typename Base = // VC6 workaround: C2516 BOOST_DEDUCED_TYPENAME bzip2_allocator_traits<Alloc>::type > struct bzip2_allocator : private Base { ... }; Unfortunately, I get the error C2039: 'rebind' : is not a member of 'fake_allocator<0>' Any suggestions? Jonathan

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[filesystem] readdir_r on SunPRO
by Caleb Epstein 03 Feb '05

03 Feb '05

Just noticed this compile error for the latest CVS code using the SunPRO compiler: "/home/nbde52d/src/boost-regression/boost/libs/filesystem/build/../src/operations_posix_windows.cpp", line 121: Error: readdir_r is not a member of file level. Here's the compile command: CC -c -g -xtarget=generic +d -features=rtti -features=except -features=tmplife -instances=static -I"/home/nbde52d/src/boost-regression/results/bin/boost/libs/filesystem/build" -I"/home/nbde52d/src/boost-regression/boost" -I"/home/nbde52d/src/boost-regression/boost" -o "/home/nbde52d/src/boost-regression/results/bin/boost/libs/filesystem/build/libboost_filesystem.a/sunpro-5_3/debug/operations_posix_windows.o" "/home/nbde52d/src/boost-regression/boost/libs/filesystem/build/../src/operations_posix_windows.cpp" The -mt flag is not present, so including <dirent.h> does not pull in the readdir_r prototype. I think the use of ::readdir_r needs to be further protected with a check for whether MT code is being compiled (BOOST_HAS_THREADS?) -- Caleb Epstein caleb dot epstein at gmail dot com

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