April 2007 - Boost - lists.boost.org

Re: [boost] [Units] Unique ordinal values (was Re: Review)
by Michael Fawcett 05 Apr '07

05 Apr '07

On 4/3/07, Steven Watanabe <steven(a)providere-consulting.com> wrote: > David Walthall <walthall <at> stanfordalumni.org> writes: > > > > The only complaint I have is that unique values of ordinal<N> have to be > > used. > > Nod. The only way to prevent collisions is to use > more bits and either guids or compile time strings > storing the fully qualified name. Matthias posted about this before and I can't remember the outcome. I was browsing some archived posts about Boost.Typeof and came across this: http://thread.gmane.org/gmane.comp.lib.boost.devel/101946/focus=102070 Would that be enough? Usage would look like: #include BOOST_UNITS_ORDINAL_GENERATOR() struct my_unit : ordinal<BOOST_UNITS_NEXT_ORDINAL> { }; Sorry if you guys have been over this ground before. --Michael Fawcett

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Re: [boost] [units] runtime performance again
by Matthias Schabel 05 Apr '07

05 Apr '07

> I added numeric solution of a simple differential equation to the > benchmark. > > output from 3 runs: > > multiplying ublas::matrix<double>(1000, 1000) : 16.016 seconds > multiplying ublas::matrix<quantity>(1000, 1000) : 16.453 seconds > tiled_matrix_multiply<double>(1000, 1000) : 1.859 seconds > tiled_matrix_multiply<quantity>(1000, 1000) : 1.843 seconds > solving y' = 1 - x + 4 * y with double: 3.219 seconds > solving y' = 1 - x + 4 * y with quantity: 2.656 seconds > > multiplying ublas::matrix<double>(1000, 1000) : 16.281 seconds > multiplying ublas::matrix<quantity>(1000, 1000) : 16.406 seconds > tiled_matrix_multiply<double>(1000, 1000) : 1.906 seconds > tiled_matrix_multiply<quantity>(1000, 1000) : 1.859 seconds > solving y' = 1 - x + 4 * y with double: 3.281 seconds > solving y' = 1 - x + 4 * y with quantity: 2.61 seconds > > multiplying ublas::matrix<double>(1000, 1000) : 16.094 seconds > multiplying ublas::matrix<quantity>(1000, 1000) : 16.516 seconds > tiled_matrix_multiply<double>(1000, 1000) : 1.875 seconds > tiled_matrix_multiply<quantity>(1000, 1000) : 1.859 seconds > solving y' = 1 - x + 4 * y with double: 3.203 seconds > solving y' = 1 - x + 4 * y with quantity: 2.672 seconds Interesting - this definitely shows some of the pitfalls of simple performance testing. Here are my results : multiplying ublas::matrix<double>(1000, 1000) : 42.78 seconds multiplying ublas::matrix<quantity>(1000, 1000) : 42.31 seconds tiled_matrix_multiply<double>(1000, 1000) : 1.73 seconds tiled_matrix_multiply<quantity>(1000, 1000) : 2.05 seconds solving y' = 1 - x + 4 * y with double: 2.59 seconds solving y' = 1 - x + 4 * y with quantity: 2.57 seconds multiplying ublas::matrix<double>(1000, 1000) : 42.74 seconds multiplying ublas::matrix<quantity>(1000, 1000) : 42.43 seconds tiled_matrix_multiply<double>(1000, 1000) : 1.77 seconds tiled_matrix_multiply<quantity>(1000, 1000) : 2.08 seconds solving y' = 1 - x + 4 * y with double: 2.59 seconds solving y' = 1 - x + 4 * y with quantity: 2.59 seconds multiplying ublas::matrix<double>(1000, 1000) : 42.78 seconds multiplying ublas::matrix<quantity>(1000, 1000) : 42.31 seconds tiled_matrix_multiply<double>(1000, 1000) : 1.74 seconds tiled_matrix_multiply<quantity>(1000, 1000) : 2.06 seconds solving y' = 1 - x + 4 * y with double: 2.6 seconds solving y' = 1 - x + 4 * y with quantity: 2.57 seconds I'm not sure why my simple matrix multiplication results are so much slower...the others are comparable. In any case, the relative performance is obviously close enough to identical for non-HPC applications... I think the performance arguments look like red herrings... I'll put this in the sandbox example code. Matthias

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Boost inspection notification (2007-04-05/RC_1_34_0) *X*
by Rene Rivera 05 Apr '07

05 Apr '07

Boost Inspection Report Run Date: 16:09:54 UTC, Thursday 05 April 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: 11449 files scanned 908 directories scanned (including root) 198 problems reported Problem counts: 0 files with invalid line endings 0 bookmarks with invalid characters 3 invalid urls 107 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 (1) date_time (1) doc (2) filesystem (37) graph (2) iostreams (3) lambda (3) math (8) more (1) mpl (4) 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| 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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 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: ../../../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: 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Boost inspection notification (2007-04-05/RC_1_34_0) *LC*
by Rene Rivera 05 Apr '07

05 Apr '07

Boost Inspection Report Run Date: 16:10:01 UTC, Thursday 05 April 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: 11449 files scanned 908 directories scanned (including root) 1051 problems reported Problem counts: 653 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 (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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Re: [boost] try... catch... finally?
by Alexander Nasonov 05 Apr '07

05 Apr '07

05.04.07, 18:50, Steven Watanabe <steven(a)providere-consulting.com>: > Just as a warning. msvc 8.0 doesn't seem to be able > to handle member functions of local classes in functions > defined in headers. Is it also true for static functions of local classes? Anyway, I have Visual Studio Express Edition and I'll play with it. Happy Easter weekend. -- Alexander Nasonov

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[Report] 0 regressions on RC_1_34_0 (2007-04-05)
by Douglas Gregor 05 Apr '07

05 Apr '07

Boost Regression test failures Report time: 2007-04-05T01:00:01Z 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… No failures! Yay!

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Question about submission process
by Eric Niebler 05 Apr '07

05 Apr '07

Is it kosher to submit a library for review, and continue to work on documentation and tests? Or should the library be "final" before it can be put in the queue? I'd like to get my expression template library (Proto) in the queue, and considering how deep the queue is at the moment, I think I'll have plenty of time to finish the docs before the review happens. -- Eric Niebler Boost Consulting www.boost-consulting.com

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Re: [boost] Intrusive library review results: library accepted
by brass goowy 05 Apr '07

05 Apr '07

Steven Watanabe writes: >AMDG >brass goowy <brass <at> goowy.com> writes: >> >- Drop the 'i' prefix from the names of containers. >> >> I disagree with this one. I think std and intrusive containers >> will often be used together. This decision will lead to longer >> names in those cases. >Is there something wrong with longer names? I prefer being able to write ilist to Intrusive::list >> I would support dropping the prefix >> if the resulting name wasn't the same as in the std. Why >> not get rid of all the vowels and call them lst? >For one thing, it looks too much like 1st. Isn't there a possibility intrusive containers will make it into the standard? If they get that nod there will be a little problem if they have the exact same names as the standard containers. This reminds me of that tv program... "This is my brother Daryl and this is my other brother Daryl." Brian Wood Ebenezer Enterprises www.webEbenezer.net

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[boostbook] Duplicates and free functions
by Julio M. Merino Vidal 05 Apr '07

05 Apr '07

Hello, I'm currently having trouble with the conversion between the XML generated by Doxygen and the Boostbook code generated by doxygen2boostbook.xsl. Some of my files define free functions and types inside a namespace (or at the top level; the problem appears equally). However, when these files are converted to Boostbook and later turned into HTML, I cannot see any of these functions. I can only see those classes that appear in the same file, but nothing else. The problem is because the code is skipping such cases. Additionally, Doxygen seems to be generating duplicate entries for some members, and I don't know why it's happening (a bug?). For example, if you document some #defines in a file, the resulting Boostbook will contain two entries for each #define, which is incorrect because 1) there are duplicate IDs, 2) the rendered document contains two entries. (This also happens with the free functions mentioned above, once they are fixed.) At last, Doxygen is also generating sectiondef's elements with an empty kind, which are also unhandled by the current code. I'm using Doxygen 1.5.1 under Mac OS X and Boost from CVS HEAD. The problems can easily be seen when building the Boost.Process' documentation that is currently in the SVN repository and later inspecting the synopsis of each header file in the Reference chapter. For example, note how "operations.hpp" is completely empty, or how "config.hpp" contains duplicates for all macros. The attached patch resolves these issues for me, but I'm not sure it is correct. Specially, the new sectiondef template in toplevel mode is needed to avoid the duplicates in the #defines' synopsis... but maybe it'd be avoided in some other way. Feel free to modify it to correct any obvious mistake, but please resolve the conversion issue :-) Thanks, PS: Is this Doxygen->Boostbook conversion experimental? Support for several things seem to be missing... -- Julio M. Merino Vidal <jmmv84(a)gmail.com>

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[Review] [units]
by Steven Watanabe 05 Apr '07

05 Apr '07

AMDG Janek Kozicki wrote: > My only complaint is about lengthy typenames. Like for example my > Newton's Law function (attached calculatorform.cpp:65): > > quantity<SI::force> newtons_law(const quantity<SI::mass>& m, const quantity<SI::acceleration>& a) > { > return m*a; > } > I don't know of any good general solution. We have the identical problem: force is already taken. It makes more sense to use it for the unit than the quantity because you can also have quantity<SI::force, long double>. > <snip> > > > The "base_unit_converter<>" in Example 16 should be hyperlinked to the > explanations what it is and how to use it. > I'll make sure that Doxygen finds the definition. > Documentation should have a FULL list of all predefined units, so it will be a > quick reference for the users. > > Ok. > > EXAMPLES > > Speed "Example 14": > > With debug information and no optimizations: > > <snip> > > > With units it is faster by two seconds. I ran the test several times, and read > the code few times. Maybe executable with "slower" units is accidentally better > synchronized with memory access frequency MHz. Congratulations, you beat me. > > Those results were obtained with: > gcc version 4.1.2 20061115 (prerelease) (Debian 4.1.1-21) > It's easily within the noise level. > Yes it should be accepted. Before adding to CVS-HEAD please do following: > > 1. support calculations of conversion factors as explained above. Attached file > calculatorform.cpp:47 (or convince me that I'm wrong, but hey - how to do it > more conveniently than in this way?) > It should be a compile error. Try quantity<SI::dimensionless>(1.0*CGS::dyne/SI::newton) With the sandbox version > 2. check for compiler used and emit an #error when unsupported compiler is > detected. So that users won't waste time on futile fights with their compilers. > Ok. Thank you for your comments. In Christ, Steven Watanabe

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