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[Boost] [Format] Bug in boost/format/parsing.hpp, Patch included
by René Bürgel 05 Mar '07

05 Mar '07

Hi, There is a bug in boost::format. It occurs, when format::parse is called multiple times. If there is a prefix before the first argument (%1%), it is prepended to the new prefix. I filed a minimal testcase to reproduce it. It works for Boost 1.33.1 and the CVS-Version. #include <boost/format.hpp> #include <iostream> int main() { boost::format Formatter; std::string Format1 = "sec = %1%"; std::string Format2 = "min = %1%"; Formatter.parse( Format1 ); Formatter.parse( Format2 ); Formatter.clear(); Formatter % 3u; //just to write something std::cout << Formatter.str() << std::endl; //it prints "sec = min = 3" instead of "min = 3" } A Patch against Boost 1.33.1 is here: --- parsing.hpp 2006-10-20 08:36:42.000000000 +0100 +++ parsing2.hpp 2007-03-05 14:49:10.000000000 +0100 @@ -413,6 +413,7 @@ // A: find upper_bound on num_items and allocates arrays int num_items = io::detail::upper_bound_from_fstring(buf, arg_mark, fac, exceptions()); make_or_reuse_data(num_items); + prefix_.resize( 0 ); // B: Now the real parsing of the format string : num_items=0; regards, René Bürgel -- Unicontrol Systemtechnik GmbH OT Dittersbach Sachsenburger Weg 34 09669 Frankenberg Tel.: 03 72 06/ 88 73 - 12 Fax: 03 72 06/ 88 73 - 60 E-Mail: r.buergel(a)unicontrol.de Internet: www.unicontrol.de Unicontrol Systemtechnik GmbH Geschäftsführer: Dipl.-Ing. Siegfried Heinze Sitz der Gesellschaft: Frankenberg Registergericht: Amtsgericht Chemnitz, HRB 15 475 Wichtiger Hinweis: Diese E-Mail und etwaige Anlagen können Betriebs- und Geschäftsgeheimnisse, dem Anwaltsgeheimnis unterliegende oder sonstige vertrauliche Informationen enthalten. Sollten Sie diese E-Mail irrtümlich erhalten haben, ist Ihnen der Status dieser E-Mail bekannt. Bitte benachrichtigen Sie uns in diesem Falle sofort durch Antwort-Mail und löschen Sie diese E-Mail nebst etwaigen Anlagen aus Ihrem System. Ebenso dürfen Sie diese E-Mail oder ihre Anlagen nicht kopieren oder an Dritte weitergeben. Vielen Dank! Important Note: This e-mail and any attachments are confidential, may contain trade secrets and may well also be legally privileged or otherwise protected from disclosure. If you have received it in error, you are on notice of its status. Please notify us immediately by reply e-mail and then delete this e-mail and any attachment from your system. If you are not the intended recipient please understand that you must not copy this e-mail or any attachments or disclose the contents to any other person. Thank you.

1 0

Bug Report
by Marshall Clow 05 Mar '07

05 Mar '07

[ Down from 99 last Wednesday ] Bug count: 97 13 dgregor 10 vladimir_prus 8 beman_dawes 6 turkanis 6 nesotto 5 jsiek 5 grafik 4 shammah 4 samuel_k 4 az_sw_dude 3 jmaurer 3 jbandela 3 fcacciola 3 djowel 2 urzuga 2 johnmaddock 2 hubert_holin 2 dlwalker 2 agurtovoy 1 witt 1 pdimov 1 nobody 1 nmusatti 1 mistevens 1 mclow 1 igaztanaga 1 daniel_wallin 1 alnsn 1 aaron_windsor Assignee: aaron_windsor <http://sourceforge.net/users/aaron_windsor/> Summary: top-level configure is broken Bug #: 1598153 <http://sourceforge.net/tracker/index.php?func=detail&aid=1598153&group_id=7…> Assignee: agurtovoy <http://sourceforge.net/users/agurtovoy/> Summary: mpl::remove compile error with gcc 4.1.0 Bug #: 1453180 <http://sourceforge.net/tracker/index.php?func=detail&aid=1453180&group_id=7…> Assignee: agurtovoy <http://sourceforge.net/users/agurtovoy/> Summary: documentation mistake Bug #: 1497329 <http://sourceforge.net/tracker/index.php?func=detail&aid=1497329&group_id=7…> Assignee: alnsn <http://sourceforge.net/users/alnsn/> Summary: boost::any - typeid comparison across shared boundaries Bug #: 1577259 <http://sourceforge.net/tracker/index.php?func=detail&aid=1577259&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: wrong usage of ios_base::narrow Bug #: 989487 <http://sourceforge.net/tracker/index.php?func=detail&aid=989487&group_id=75…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: date_time type conversion warning Bug #: 1069225 <http://sourceforge.net/tracker/index.php?func=detail&aid=1069225&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: from_ftime incorrectly processes FILETIME filled with zeros Bug #: 1471025 <http://sourceforge.net/tracker/index.php?func=detail&aid=1471025&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: operator<< for gregorian::date_duration not found Bug #: 1498778 <http://sourceforge.net/tracker/index.php?func=detail&aid=1498778&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: linker error mingw 3.4.5 Bug #: 1426819 <http://sourceforge.net/tracker/index.php?func=detail&aid=1426819&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: VC8 can't find windows.h even though environment is correct! Bug #: 1468124 <http://sourceforge.net/tracker/index.php?func=detail&aid=1468124&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: Log level names wrong in documentation Bug #: 1475886 <http://sourceforge.net/tracker/index.php?func=detail&aid=1475886&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: [filesystem] portable_posix_name() may fail on premain call Bug #: 1509633 <http://sourceforge.net/tracker/index.php?func=detail&aid=1509633&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: significantly different timer class behaviour on Win and Lin Bug #: 1520489 <http://sourceforge.net/tracker/index.php?func=detail&aid=1520489&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: directory_iterator doesn't work with catch Bug #: 1576175 <http://sourceforge.net/tracker/index.php?func=detail&aid=1576175&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: Seekable file_descriptor_source /sink? Bug #: 1649008 <http://sourceforge.net/tracker/index.php?func=detail&aid=1649008&group_id=7…> Assignee: beman_dawes <http://sourceforge.net/users/beman_dawes/> Summary: typo in auto_unit_test.hpp Revision 1.17 Bug #: 1666428 <http://sourceforge.net/tracker/index.php?func=detail&aid=1666428&group_id=7…> Assignee: daniel_wallin <http://sourceforge.net/users/daniel_wallin/> Summary: [Parameter] Docco error section 2.7.2 Bug #: 1378446 <http://sourceforge.net/tracker/index.php?func=detail&aid=1378446&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: LEDA graph adaptors do not handle hidden nodes properly Bug #: 1168431 <http://sourceforge.net/tracker/index.php?func=detail&aid=1168431&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: random_vertex/random_edge are unnecessarily inefficient Bug #: 1204684 <http://sourceforge.net/tracker/index.php?func=detail&aid=1204684&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Document copy_component Bug #: 1204688 <http://sourceforge.net/tracker/index.php?func=detail&aid=1204688&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: reverse_graph and constness of property maps Bug #: 1246336 <http://sourceforge.net/tracker/index.php?func=detail&aid=1246336&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Bundled graph properties Bug #: 1420498 <http://sourceforge.net/tracker/index.php?func=detail&aid=1420498&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Dijkstra no_init version should not require VertexListGraph Bug #: 1540116 <http://sourceforge.net/tracker/index.php?func=detail&aid=1540116&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Johnson All-Pairs needs better 'no path' information Bug #: 1567811 <http://sourceforge.net/tracker/index.php?func=detail&aid=1567811&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Numbered headers don't work with 'preferred' syntax Bug #: 1567812 <http://sourceforge.net/tracker/index.php?func=detail&aid=1567812&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Fruchterman-Reingold grid performance can be improved Bug #: 1567818 <http://sourceforge.net/tracker/index.php?func=detail&aid=1567818&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Const correctness violation Bug #: 1567821 <http://sourceforge.net/tracker/index.php?func=detail&aid=1567821&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Memory leaks in adjacency_list? Bug #: 1567828 <http://sourceforge.net/tracker/index.php?func=detail&aid=1567828&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Memory leaks with signal::connect? Bug #: 1567829 <http://sourceforge.net/tracker/index.php?func=detail&aid=1567829&group_id=7…> Assignee: dgregor <http://sourceforge.net/users/dgregor/> Summary: Implicit graph not implement Bug #: 1657243 <http://sourceforge.net/tracker/index.php?func=detail&aid=1657243&group_id=7…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: Miss ' = ParserT()' Bug #: 907299 <http://sourceforge.net/tracker/index.php?func=detail&aid=907299&group_id=75…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: spirit insert_key_actor.hpp Bug #: 1059936 <http://sourceforge.net/tracker/index.php?func=detail&aid=1059936&group_id=7…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: crash in boost::spirit::parse Bug #: 1509978 <http://sourceforge.net/tracker/index.php?func=detail&aid=1509978&group_id=7…> Assignee: dlwalker <http://sourceforge.net/users/dlwalker/> Summary: boost/crc.hpp uses non-standard conforming syntax Bug #: 1478435 <http://sourceforge.net/tracker/index.php?func=detail&aid=1478435&group_id=7…> Assignee: dlwalker <http://sourceforge.net/users/dlwalker/> Summary: 'Bug' in comment (x2) Bug #: 1588359 <http://sourceforge.net/tracker/index.php?func=detail&aid=1588359&group_id=7…> Assignee: fcacciola <http://sourceforge.net/users/fcacciola/> Summary: Numeric Conversion Documentation minor bug Bug #: 1480954 <http://sourceforge.net/tracker/index.php?func=detail&aid=1480954&group_id=7…> Assignee: fcacciola <http://sourceforge.net/users/fcacciola/> Summary: optional documentation Bug #: 1587134 <http://sourceforge.net/tracker/index.php?func=detail&aid=1587134&group_id=7…> Assignee: fcacciola <http://sourceforge.net/users/fcacciola/> Summary: No zero-argument in_place() Bug #: 1646100 <http://sourceforge.net/tracker/index.php?func=detail&aid=1646100&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: boost jam problem with parallel builds Bug #: 1234224 <http://sourceforge.net/tracker/index.php?func=detail&aid=1234224&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: boost.build needs fixes for HP/UX Bug #: 1395924 <http://sourceforge.net/tracker/index.php?func=detail&aid=1395924&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Wrong .bat name in vc-8_0-x86_amd64-tools.jam Bug #: 1548427 <http://sourceforge.net/tracker/index.php?func=detail&aid=1548427&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Generated files '@()' don't work in regular expressions. Bug #: 1549607 <http://sourceforge.net/tracker/index.php?func=detail&aid=1549607&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: bjam bug in windows? Bug #: 1668728 <http://sourceforge.net/tracker/index.php?func=detail&aid=1668728&group_id=7…> Assignee: hubert_holin <http://sourceforge.net/users/hubert_holin/> Summary: Cannot compile octonion_test.cpp because of bug in sinc.hpp Bug #: 751289 <http://sourceforge.net/tracker/index.php?func=detail&aid=751289&group_id=75…> Assignee: hubert_holin <http://sourceforge.net/users/hubert_holin/> Summary: octonion documentation bug Bug #: 1499814 <http://sourceforge.net/tracker/index.php?func=detail&aid=1499814&group_id=7…> Assignee: igaztanaga <http://sourceforge.net/users/igaztanaga/> Summary: Shmem serious bugs Bug #: 1518563 <http://sourceforge.net/tracker/index.php?func=detail&aid=1518563&group_id=7…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: Compiler error for tokenizer on Solaris Bug #: 976241 <http://sourceforge.net/tracker/index.php?func=detail&aid=976241&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: token_iterator::at_end() result is inversed Bug #: 1338326 <http://sourceforge.net/tracker/index.php?func=detail&aid=1338326&group_id=7…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: bug in char_separator Bug #: 1510041 <http://sourceforge.net/tracker/index.php?func=detail&aid=1510041&group_id=7…> Assignee: jmaurer <http://sourceforge.net/users/jmaurer/> Summary: Diff in state of mersenne_twister gen between GCC3.41 & CW9 Bug #: 1115124 <http://sourceforge.net/tracker/index.php?func=detail&aid=1115124&group_id=7…> Assignee: jmaurer <http://sourceforge.net/users/jmaurer/> Summary: uniform_01 copies engine instead of using a reference Bug #: 1464566 <http://sourceforge.net/tracker/index.php?func=detail&aid=1464566&group_id=7…> Assignee: jmaurer <http://sourceforge.net/users/jmaurer/> Summary: uniform_int<> with type's maximum availaible range error Bug #: 1646394 <http://sourceforge.net/tracker/index.php?func=detail&aid=1646394&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: Adding boost::is_complex to type_traits.hpp Bug #: 1315712 <http://sourceforge.net/tracker/index.php?func=detail&aid=1315712&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: Warnings on MSVC 2005 Bug #: 1596577 <http://sourceforge.net/tracker/index.php?func=detail&aid=1596577&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: Spelling of Edmonds-Karp-Algorithm Bug #: 1226292 <http://sourceforge.net/tracker/index.php?func=detail&aid=1226292&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: Calling subgraph::global_to_local on a root graph Bug #: 1444271 <http://sourceforge.net/tracker/index.php?func=detail&aid=1444271&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: strange compiling problem for transitive_closure Bug #: 1489545 <http://sourceforge.net/tracker/index.php?func=detail&aid=1489545&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: concept_check.hpp unused variable warning Bug #: 1636134 <http://sourceforge.net/tracker/index.php?func=detail&aid=1636134&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: remove_edge core dumps on self-circle Bug #: 1641750 <http://sourceforge.net/tracker/index.php?func=detail&aid=1641750&group_id=7…> Assignee: mclow <http://sourceforge.net/users/mclow/> Summary: Solaris - once.cpp compile error Bug #: 549162 <http://sourceforge.net/tracker/index.php?func=detail&aid=549162&group_id=75…> Assignee: mistevens <http://sourceforge.net/users/mistevens/> Summary: ublas: bug in mapped_vector_of_mapped_vector Bug #: 1528178 <http://sourceforge.net/tracker/index.php?func=detail&aid=1528178&group_id=7…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: boost.range and 'const char[]'. Bug #: 1272315 <http://sourceforge.net/tracker/index.php?func=detail&aid=1272315&group_id=7…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: [Boost.Range]boost::const_begin calls non-qualified 'begin' Bug #: 1361686 <http://sourceforge.net/tracker/index.php?func=detail&aid=1361686&group_id=7…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: bug in boost::range_detail Bug #: 1484477 <http://sourceforge.net/tracker/index.php?func=detail&aid=1484477&group_id=7…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: local_time_facet error in VS2005 Win2003 Bug #: 1551784 <http://sourceforge.net/tracker/index.php?func=detail&aid=1551784&group_id=7…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: The ptr_map iterator cannot be dereference to value type Bug #: 1566672 <http://sourceforge.net/tracker/index.php?func=detail&aid=1566672&group_id=7…> Assignee: nesotto <http://sourceforge.net/users/nesotto/> Summary: boost::assignment documentation: mathematical 'typo' Bug #: 1631893 <http://sourceforge.net/tracker/index.php?func=detail&aid=1631893&group_id=7…> Assignee: nmusatti <http://sourceforge.net/users/nmusatti/> Summary: Borland compiler error with Pool, boost::pool_allocator Bug #: 988124 <http://sourceforge.net/tracker/index.php?func=detail&aid=988124&group_id=75…> Assignee: nobody Summary: BOOST_IOSTREAMS_HAS_LSEEK64 on Mac OS X Bug #: 1649025 <http://sourceforge.net/tracker/index.php?func=detail&aid=1649025&group_id=7…> Assignee: pdimov <http://sourceforge.net/users/pdimov/> Summary: gcc-4.2 atomicity.h location Bug #: 1599422 <http://sourceforge.net/tracker/index.php?func=detail&aid=1599422&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: format: assert when parsing invalid pattern Bug #: 1326132 <http://sourceforge.net/tracker/index.php?func=detail&aid=1326132&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: boost::format parse method doesn't work Bug #: 1439607 <http://sourceforge.net/tracker/index.php?func=detail&aid=1439607&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: 64 bit compile warning/error for boost::format Bug #: 1451470 <http://sourceforge.net/tracker/index.php?func=detail&aid=1451470&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: format zero length string msvc-8 Bug #: 1537844 <http://sourceforge.net/tracker/index.php?func=detail&aid=1537844&group_id=7…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: ct_gcd_lcm.hpp compilation error Bug #: 558174 <http://sourceforge.net/tracker/index.php?func=detail&aid=558174&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: pool::purge_memory() does not reset next_size Bug #: 984124 <http://sourceforge.net/tracker/index.php?func=detail&aid=984124&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: perfomance: memory cleanup for pool takes too long Bug #: 995270 <http://sourceforge.net/tracker/index.php?func=detail&aid=995270&group_id=75…> Assignee: shammah <http://sourceforge.net/users/shammah/> Summary: boost::pool_allocator breaks with vector of vectors Bug #: 1179641 <http://sourceforge.net/tracker/index.php?func=detail&aid=1179641&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: problem with boost::iostreams when compiled with Visual C++ Bug #: 1365752 <http://sourceforge.net/tracker/index.php?func=detail&aid=1365752&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: Changing size of memory-mapped file on Windows Bug #: 1532684 <http://sourceforge.net/tracker/index.php?func=detail&aid=1532684&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: bug in iostreams/copy.hpp line 81 Bug #: 1610369 <http://sourceforge.net/tracker/index.php?func=detail&aid=1610369&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: iostreams::tee_filter is for output only Bug #: 1612981 <http://sourceforge.net/tracker/index.php?func=detail&aid=1612981&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: Performance problem in iostreams Bug #: 1643575 <http://sourceforge.net/tracker/index.php?func=detail&aid=1643575&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: Incorrect usage of bad_write(), bad_seek() etc. Bug #: 1649001 <http://sourceforge.net/tracker/index.php?func=detail&aid=1649001&group_id=7…> Assignee: urzuga <http://sourceforge.net/users/urzuga/> Summary: [boost::lambda] Compile error with libstdc++ debug mode Bug #: 1444052 <http://sourceforge.net/tracker/index.php?func=detail&aid=1444052&group_id=7…> Assignee: urzuga <http://sourceforge.net/users/urzuga/> Summary: Lambda: (_1 + 'y')(string('x')) Doesn't Compile Bug #: 1602075 <http://sourceforge.net/tracker/index.php?func=detail&aid=1602075&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: multitoken broken in program_options 1.33 Bug #: 1266877 <http://sourceforge.net/tracker/index.php?func=detail&aid=1266877&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: Fixes for build on IBM pSeries for AIX and Linux Bug #: 1446471 <http://sourceforge.net/tracker/index.php?func=detail&aid=1446471&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: Boost Jam, and non english directorys Bug #: 1480900 <http://sourceforge.net/tracker/index.php?func=detail&aid=1480900&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: program_options: format_paragraph assert fails on long line Bug #: 1485069 <http://sourceforge.net/tracker/index.php?func=detail&aid=1485069&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: boost 1.33.1 build error Bug #: 1487256 <http://sourceforge.net/tracker/index.php?func=detail&aid=1487256&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: [program_options] Endless loop with long default arguments Bug #: 1528399 <http://sourceforge.net/tracker/index.php?func=detail&aid=1528399&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: Parameter reversal in program_options documentation Bug #: 1574213 <http://sourceforge.net/tracker/index.php?func=detail&aid=1574213&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: Function name error in program_options documentation Bug #: 1574751 <http://sourceforge.net/tracker/index.php?func=detail&aid=1574751&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: program_options find assert fails with multibyte characters Bug #: 1594324 <http://sourceforge.net/tracker/index.php?func=detail&aid=1594324&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: [program_options] parse_config_file documentation bug Bug #: 1632327 <http://sourceforge.net/tracker/index.php?func=detail&aid=1632327&group_id=7…> Assignee: witt <http://sourceforge.net/users/witt/> Summary: Homepage regression links Bug #: 1662831 <http://sourceforge.net/tracker/index.php?func=detail&aid=1662831&group_id=7…> -- -- Marshall Marshall Clow Idio Software <mailto:marshall@idio.com> It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shaking, the shaking becomes a warning. It is by caffeine alone I set my mind in motion.

1 0

Patches report
by Marshall Clow 05 Mar '07

05 Mar '07

[ Unchanged from last Friday ] Patch count: 18 3 vladimir_prus 2 rogeeff 2 nobody 2 agurtovoy 1 turkanis 1 ramey 1 pdimov 1 jsiek 1 johnmaddock 1 grafik 1 dlwalker 1 az_sw_dude 1 anthonyw Assignee: agurtovoy <http://sourceforge.net/users/agurtovoy/> Summary: Adjusts mpl::pair concept to be compatible with STL pairs Bug #: 1489713 <http://sourceforge.net/tracker/index.php?func=detail&aid=1489713&group_id=7…> Assignee: agurtovoy <http://sourceforge.net/users/agurtovoy/> Summary: [mpl] evc4 port Bug #: 1583396 <http://sourceforge.net/tracker/index.php?func=detail&aid=1583396&group_id=7…> Assignee: anthonyw <http://sourceforge.net/users/anthonyw/> Summary: [thread] MSVS: Allow use of thread headers with /Za Bug #: 1627420 <http://sourceforge.net/tracker/index.php?func=detail&aid=1627420&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: Unused variable in format date parser Bug #: 1652860 <http://sourceforge.net/tracker/index.php?func=detail&aid=1652860&group_id=7…> Assignee: dlwalker <http://sourceforge.net/users/dlwalker/> Summary: [integer] add support for integers longer than long Bug #: 1507034 <http://sourceforge.net/tracker/index.php?func=detail&aid=1507034&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: bjam: always define OSPLAT Bug #: 1619769 <http://sourceforge.net/tracker/index.php?func=detail&aid=1619769&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: [config] evc4 port Bug #: 1489359 <http://sourceforge.net/tracker/index.php?func=detail&aid=1489359&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: [concept_check.hpp] remove unused variable warning in msvc Bug #: 1388901 <http://sourceforge.net/tracker/index.php?func=detail&aid=1388901&group_id=7…> Assignee: nobody Summary: lexical_cast - local variable shadow patch Bug #: 1665462 <http://sourceforge.net/tracker/index.php?func=detail&aid=1665462&group_id=7…> Assignee: nobody Summary: pool allocator - local variable shadow patch Bug #: 1665468 <http://sourceforge.net/tracker/index.php?func=detail&aid=1665468&group_id=7…> Assignee: pdimov <http://sourceforge.net/users/pdimov/> Summary: support for weak_ptr binding Bug #: 1633503 <http://sourceforge.net/tracker/index.php?func=detail&aid=1633503&group_id=7…> Assignee: ramey <http://sourceforge.net/users/ramey/> Summary: [archive] codecvt_null.hpp won't compile on QNX Bug #: 1636855 <http://sourceforge.net/tracker/index.php?func=detail&aid=1636855&group_id=7…> Assignee: rogeeff <http://sourceforge.net/users/rogeeff/> Summary: [test] no eh exception handling functions on evc4 Bug #: 1499418 <http://sourceforge.net/tracker/index.php?func=detail&aid=1499418&group_id=7…> Assignee: rogeeff <http://sourceforge.net/users/rogeeff/> Summary: [test] evc4 issue with SEH support Bug #: 1583399 <http://sourceforge.net/tracker/index.php?func=detail&aid=1583399&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: iostreams // file_descriptor::seek BUG on files > 4 GB Bug #: 1452698 <http://sourceforge.net/tracker/index.php?func=detail&aid=1452698&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: [program_options] static const variable on evc4 Bug #: 1499420 <http://sourceforge.net/tracker/index.php?func=detail&aid=1499420&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: [program_options] putenv on Solaris Bug #: 1568191 <http://sourceforge.net/tracker/index.php?func=detail&aid=1568191&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: VC80-Compatible String Processing in format_paragraph() Bug #: 1580068 <http://sourceforge.net/tracker/index.php?func=detail&aid=1580068&group_id=7…> -- -- Marshall Marshall Clow Idio Software <mailto:marshall@idio.com> It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shaking, the shaking becomes a warning. It is by caffeine alone I set my mind in motion.

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Support requests report
by Marshall Clow 05 Mar '07

05 Mar '07

[ Down from 40 last Wednesday ] Support count: 39 9 grafik 5 vladimir_prus 4 nobody 4 johnmaddock 3 jsiek 3 jbandela 2 turkanis 2 az_sw_dude 1 urzuga 1 samuel_k 1 rogeeff 1 hkaiser 1 fcacciola 1 djowel 1 agurtovoy Assignee: agurtovoy <http://sourceforge.net/users/agurtovoy/> Summary: duplicat initial members -> erase_key postcond. fail Bug #: 1642614 <http://sourceforge.net/tracker/index.php?func=detail&aid=1642614&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: support new 2007 DST rules for timezone db Bug #: 1471723 <http://sourceforge.net/tracker/index.php?func=detail&aid=1471723&group_id=7…> Assignee: az_sw_dude <http://sourceforge.net/users/az_sw_dude/> Summary: new timezone db file for #1471723 - 2007 DST support Bug #: 1478619 <http://sourceforge.net/tracker/index.php?func=detail&aid=1478619&group_id=7…> Assignee: djowel <http://sourceforge.net/users/djowel/> Summary: Embedded python won't compile Bug #: 1391956 <http://sourceforge.net/tracker/index.php?func=detail&aid=1391956&group_id=7…> Assignee: fcacciola <http://sourceforge.net/users/fcacciola/> Summary: boost::optional<enum> fails with /CLR Bug #: 973424 <http://sourceforge.net/tracker/index.php?func=detail&aid=973424&group_id=75…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Jam Fails to Build Bug #: 954048 <http://sourceforge.net/tracker/index.php?func=detail&aid=954048&group_id=75…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Boost on opteron AMD Bug #: 1200700 <http://sourceforge.net/tracker/index.php?func=detail&aid=1200700&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Linker Problems with VC .NET 2003 / STLPort / Boost Bug #: 1292345 <http://sourceforge.net/tracker/index.php?func=detail&aid=1292345&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Unable to build boost with Dinkumware STL version 4.02 Bug #: 1336312 <http://sourceforge.net/tracker/index.php?func=detail&aid=1336312&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Compiling only needed version Bug #: 1377001 <http://sourceforge.net/tracker/index.php?func=detail&aid=1377001&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Building universal binary on MacOSX Bug #: 1409774 <http://sourceforge.net/tracker/index.php?func=detail&aid=1409774&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Cross compiling boost for Windows CE (ARM) from VS2005 Bug #: 1457763 <http://sourceforge.net/tracker/index.php?func=detail&aid=1457763&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: libraries won't build Bug #: 1524001 <http://sourceforge.net/tracker/index.php?func=detail&aid=1524001&group_id=7…> Assignee: grafik <http://sourceforge.net/users/grafik/> Summary: Having some trouble building boost Bug #: 1534701 <http://sourceforge.net/tracker/index.php?func=detail&aid=1534701&group_id=7…> Assignee: hkaiser <http://sourceforge.net/users/hkaiser/> Summary: compiler is out of heap space in pass 2 Bug #: 1481122 <http://sourceforge.net/tracker/index.php?func=detail&aid=1481122&group_id=7…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: Problem compiling :/ Bug #: 942349 <http://sourceforge.net/tracker/index.php?func=detail&aid=942349&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: SLOOOWW tokenizer compilation on VC++6.0 Bug #: 969590 <http://sourceforge.net/tracker/index.php?func=detail&aid=969590&group_id=75…> Assignee: jbandela <http://sourceforge.net/users/jbandela/> Summary: Visual C++ 'Language Extensions' support Bug #: 1039338 <http://sourceforge.net/tracker/index.php?func=detail&aid=1039338&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: Regex Bug #: 1156957 <http://sourceforge.net/tracker/index.php?func=detail&aid=1156957&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: Problem running configure for unsupported platform Bug #: 1339778 <http://sourceforge.net/tracker/index.php?func=detail&aid=1339778&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: regex - perl syntax affects what gets matched Bug #: 1519824 <http://sourceforge.net/tracker/index.php?func=detail&aid=1519824&group_id=7…> Assignee: johnmaddock <http://sourceforge.net/users/johnmaddock/> Summary: Crash on RH machine with gcc < 3.4 Bug #: 1635211 <http://sourceforge.net/tracker/index.php?func=detail&aid=1635211&group_id=7…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: Boost with Dinkumware C++ Library !? Bug #: 531963 <http://sourceforge.net/tracker/index.php?func=detail&aid=531963&group_id=75…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: creating my own properties Bug #: 619615 <http://sourceforge.net/tracker/index.php?func=detail&aid=619615&group_id=75…> Assignee: jsiek <http://sourceforge.net/users/jsiek/> Summary: Max Flow Algorithm Bug #: 1445526 <http://sourceforge.net/tracker/index.php?func=detail&aid=1445526&group_id=7…> Assignee: nobody Summary: Building Boost with Open Watcom Compiler Bug #: 1547257 <http://sourceforge.net/tracker/index.php?func=detail&aid=1547257&group_id=7…> Assignee: nobody Summary: warning using pool.hpp Bug #: 1663127 <http://sourceforge.net/tracker/index.php?func=detail&aid=1663127&group_id=7…> Assignee: nobody Summary: boost::signals Bug #: 1670112 <http://sourceforge.net/tracker/index.php?func=detail&aid=1670112&group_id=7…> Assignee: nobody Summary: [Test Library] How to init/free a singleton Bug #: 1670855 <http://sourceforge.net/tracker/index.php?func=detail&aid=1670855&group_id=7…> Assignee: rogeeff <http://sourceforge.net/users/rogeeff/> Summary: failing on 6 targets in MacOS X Bug #: 1572712 <http://sourceforge.net/tracker/index.php?func=detail&aid=1572712&group_id=7…> Assignee: samuel_k <http://sourceforge.net/users/samuel_k/> Summary: Boost.Format doesn't work on MSVC with /vd2 compiler option Bug #: 1545133 <http://sourceforge.net/tracker/index.php?func=detail&aid=1545133&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: Boost.Iostreams and newline translation Bug #: 1299123 <http://sourceforge.net/tracker/index.php?func=detail&aid=1299123&group_id=7…> Assignee: turkanis <http://sourceforge.net/users/turkanis/> Summary: boost.iostreams file_descriptor and sharing Bug #: 1445474 <http://sourceforge.net/tracker/index.php?func=detail&aid=1445474&group_id=7…> Assignee: urzuga <http://sourceforge.net/users/urzuga/> Summary: lambda vs pure virtual functions Bug #: 1231445 <http://sourceforge.net/tracker/index.php?func=detail&aid=1231445&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: program_options Can one have options with optional values? Bug #: 1102652 <http://sourceforge.net/tracker/index.php?func=detail&aid=1102652&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: program_options Can one have options with optional values? Bug #: 1102664 <http://sourceforge.net/tracker/index.php?func=detail&aid=1102664&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: program_options bug? Bug #: 1114084 <http://sourceforge.net/tracker/index.php?func=detail&aid=1114084&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: Boost.Build v2 build script help for evc4 Bug #: 1498919 <http://sourceforge.net/tracker/index.php?func=detail&aid=1498919&group_id=7…> Assignee: vladimir_prus <http://sourceforge.net/users/vladimir_prus/> Summary: Bjam build should support attachment of individual build ids Bug #: 1530168 <http://sourceforge.net/tracker/index.php?func=detail&aid=1530168&group_id=7…> -- -- Marshall Marshall Clow Idio Software <mailto:marshall@idio.com> It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shaking, the shaking becomes a warning. It is by caffeine alone I set my mind in motion.

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[Bimap] Review
by Fernando Cacciola 05 Mar '07

05 Mar '07

Hello Matias, Here's a partial review, focused on the first things I observed so far. 1. The very first thing I see is a nice bold question: "What is a bimap?" However, everything that follows doesn't feel like a good answer. Is more like the explanation of the missing answer. For such a concrete question I would expect a concrete answer like: "A Bimap is a data structure that represents bidirectional relations between elements of two collections", or something like that. Furthermore, at this introductory point in the tutorial, the very first mention of "bm.left" should IMHO be closely followed by its definition, yet the statement "is signature compatible with std::map<A,B>" is a bit simplistic at that. The same goes for bm.right and 'bm' itself. 2. The next thing one sees is the nice diagram. It's so nice that it sticks and weights in the understanding of the nature of a bimap. Even if one reads through the text, the picture drives the understanding. At least that's how it works in my head. However, it's a bit misleading, and I finally figured what, IMHO, is wrong with this picture :) Bare with me... On the one hand I see two sets, X and Y (drawn as Venn diagrams), and a biyective relation (the arrows). Pretty straightforward. On the other hand I see class bimap<X,Y>, followed by set< relation<X,Y> >, which one interprets as it's true nature given the way it is presented. Now, on yet another hand, or a left foot maybe, I also see bimap<X,Y>::left, which is really a map<X,Y>, and then a bimap<X,Y>::right, which is really a map<Y,X>. Eventually, I realized one of the most important aspects of a bimap: its triality (yes, this is a word). It is at the same time a set of elements (which happen to be relations), a map from left to right, and a map from right to left. Thus, set< relation<X,Y> > is not the only true nature of a bimap even though it stands up-front in the picture. In fact, it could be argued that the reverse view is the whole point of bimap<>. It's the reason of its existence. That is, the set< relation<X,Y> > nature of it, even if useful and novel, is secondary. One could have the same for an ordinary map for that matter. So, on the one hand, I would focus the presentation on the symmetric views first, then extend it to incorporate the (secondary) set-of-relations interface. So, let's see the pictorialization of the two symmetric maps. In the current picture, you see the left map sightly on top of the set X, and the right map slightly on top of the set Y. Bur this draws the subconscious association between the left map and X and the right map and Y. However, a map is a relation, so *both* elements are part of a map. Therefore, the picture should better relate both X and Y to each of the maps. Furthermore, these maps overlay each other over the same data structure, they are not just two disjoint maps. I noticed that part of the confusion comes from the fact that each map is enclosed in disjoint ballons, and, actually, those ballons have no real iconic value (they don't represent anything useful by themselves). The maps could be drawn at both sides of the sets and the ballons could be drawn to enclose both sets, such that at the intersection of both ballons, you see "the bimap" (the two sets and the relations between them). Also, to further guide the role of each map as a directed view of the relation, I would use two colors and two single-headed arrows, one of each color, instead of one double-headed arrow as it is now. Finally, I would put the set< relation<X,Y> > role at the bottom, to move the focus away from it, and its ballon would also enclose the two sets. In the end, there are three ballons all intersecting at the region containing the Veen diagrams, expressing the fact that a bimap<> offers three views over the same thing. 4.The following is from the second tutorial page (headed "The Tutorial") 4.a.It says: "New concepts are however presented to extend the mapping framework to bidirectional maps" That is confusing because at that point of the reading, there is no such thing as "a mapping framework". I would say "the std map class" instead. 4.b. The expression "new framework" is also confusing. A "new" something must relate to an "old" soemthing, and boost::bimap, IMO, should NOT be seen as something "new" while std::map as something old. I would say "the Bimap framework" instead (this applies to many other pages in the docs) 4.d. Here's the first time the expression "set type" is used. This expression is used all over the documentation but there is problem: the term "set" is not defined so one is forced to imagine its definition. Is it an STL set? Is it a mathematical set? Does it have special requirements? Granted, one eventually realizes you meant a mathematical set instead of an STL set, but even then, Bimap is purposedly designed to relax all such requirements, even uniqueness, so I think a better word for this concept is "collection". The reason is that you can actually use a vector for this type, which can hardly be considered as representing a mathematical set (because it doesn't guarantee uniqueness). 5. Here's an analysis of the "standard mapping framework" picture (following the same ideas as before); 5.a.The ballow should enclose both Venn diagrams since a map contains both elements. 5.b.The words "first/second" on top of std::map are confusing IMO. I would remove them. 5.c.In a std::map there is no explicit "set type" for the collection of keys, so at this point the label to it is confusing. I would removed it. 6. After the picture you read "this is not wrong.". What isn't? 7. In the introduction of the standard mapping framework, the idea of a map seen as an overlay of two "set types" is presented, but unfortunately quite superficially. This way of looking at it great, but is also a bit novel since the "standard framework" doesn't speak of left and right sets at all. Thus, besides what I mentioned before about replacing "set" by "collection", I think you should add an entire page explicitely presenting the idea, at a conceptual level, that a map is the overlay of two collections. Much before the standard mapping framework is introduced. That's all for now.. but there's more. Best regards And as promised: !!! vamos vamos, Argentina !! ------ Fernando Cacciola SciSoft http://certuscode.wordpress.com http://fcacciola.50webs.com http://fcacciola.wordpress.com

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[thread] tss bug?
by Johan Nilsson 05 Mar '07

05 Mar '07

Hi, I don't know if this is a known bug or not: When using thread_specific_ptr's, if at any time later in the program the total tss data items drops to zero, it is no longer possible to use tss data. Example: ----------------- #include <boost/test/minimal.hpp> #include <boost/thread/tss.hpp> using namespace boost; int test_main(int, char*[]) { { thread_specific_ptr<int> pi; } try { thread_specific_ptr<int> pi; } catch (thread_resource_error&) { BOOST_FAIL("Can't use TSS any longer after initial usage dropped to zero!"); } return 0; } --------------------- The above program fails when using Boost from the RC_1_34_0 branch + msvc 8.0 under XP SP2 (my copy of the 1.34 branch is not very recent - from January this year). Haven't tried other combinations. The actual problem seems to be related to tss deinit based on reference counting and init based on once_init, IIUC. Best regards, Johan Nilsson

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iterator/transform_iterator.hpp has more dependencies than it needs?
by Michael Marcin 04 Mar '07

04 Mar '07

My work likes to keep a minimal subset of boost in the project tree. One of the libraries we are using (I can't remember which off hand) requires transform_iterator.hpp which includes boost/function.hpp. I noticed when merging in the latest RC updates that I had commented out this header as it doesn't appear to be necessary and saves me from bringing yet another library into the mini-boost folder. Is this dependency actually necessary? Thanks, Michael Marcin

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Who is using boost: Python-Ogre
by Roman Yakovenko 04 Mar '07

04 Mar '07

One more project that uses Boost ( Boost.Python ) Python-Ogre is a Python bindings for Ogre 3D - a scene-oriented, flexible 3D engine. Python-Ogre uses Boost.Python to expose next libraries to Python: * Ogre * Newton * ODE * OgreAL * CEGUI * OIS Home page: http://python-ogre.python-hosting.com/ -- Roman Yakovenko C++ Python language binding http://www.language-binding.net/

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Re: [boost] interest in a "signal flow" library?
by Stjepan Rajko 04 Mar '07

04 Mar '07

> From: "Yigong Liu" <yigongliu(a)gmail.com> > Subject: Re: [boost] interest in a "signal flow" library? > > Signal_links looks like a nice light-weight feature to have when developing > event dispatching applications using Boost.Signal. From its current syntax, > looks like it will work most naturally for linear pipeline and tree like > connection topologies, for more complicated connection topologies (such as > mesh or acyclic graph), we will have to break it up into pipeline or trees > and set up them in several steps? that said, it still makes code cleaner and > clearer. could we have some samples showing dynamic reconfiguration works > (adding/removing new senders/recvers)? Yes, I think the operator based approach might not extend too well to more complicated topologies, so several steps would be necessary. Unless we added direct support for commonly used topologies (e.g., mesh), which could be nice. I do need to extend the reconfiguration capabilities and examples. I'm hoping to get around to incorporating some of the more easily addressable feedback I've received into the next iteration of the implementation / documentation within the next week. > The scenario Paolo mentioned: > "video_generator >>= ( effect1 && effect2 ) >>= image_sum >>= display" > in fact the middle part of it "( effect1 && effect2 ) >>= image_sum" is so > called "join" pattern in message passing. i have written a boost based > framework (http://channel.sourceforge.net) for asynchronous events and > message passing which support both choice/join patterns, executing callbacks > in thread pools, push/pull models and other stuff which you may find > interesting, although it doesnt have the elegant api of Boost.Signal. I gave it a brief glance and did find it interesting - I really like the distributed aspect. I will look into it more. Thanks, Stjepan

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Re: [boost] interest in a "signal flow" library?
by Stjepan Rajko 04 Mar '07

04 Mar '07

> From: Braddock <braddock(a)braddock.com> > Subject: Re: [boost] interest in a "signal flow" library? > > However, adopting a functional style is one thing. But creating a new > syntax which constrains you to that style, appears less expressive than > the C++ language itself, and will undoubtedly be more difficult > to maintain, is an act that requires considerable justification. > > I would have a legitimate need for your syntax if, for example, the > different functions executed in parallel threads, or were queued to > specific worker threads, if I could somehow otherwise control and > schedule the execution of the invoked functions, or traverse the call > graph. This could bring it closer to a "pipes and filters", LabView, or > Petri Net design, but all are very different than straight signal wiring > of serial processes. Adding functionality that relates to the network as a whole (like traversing the call graph) would indeed be a significant leap in the usability of the library. It might take a while for me to find a good way of doing that, but I'll definitelly try something. The threading idea is great - I think I'll be shifting my focus to using the thread_safe_signals and trying to tackle some of those possibilities. Thanks, Stjepan

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