July 2006 - Boost - lists.preview.boost.org

Sun-5.8 failures
by Gennaro Prota 10 Aug '06

10 Aug '06

Hi guys, among the various Sun CC failures that permeate our regression tests there's one which seems quite straightforward to fix (so it probably isn't :-)): the compiler claims ambiguity between test_tools::tt_detail::print_helper<char[1]> (const char(&)[1]) test_tools::tt_detail::print_helper<const char, 1>(const char(&)[1]) in "boost/test/test_tools.hpp". AFAICT, that's correct and we should fix the code between lines 377 and 389. -- [ Gennaro Prota, C++ … [View More]

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Spurious warning in lexical_cast.hpp
by Joe Gottman 09 Aug '06

09 Aug '06

When I compile lexical_cast.hpp using MSVC 03 I get a spurious warning: warning C4701: local variable 'result' may be used without having been initialized. It comes from the following function: template<typename Target, typename Source> Target lexical_cast(const Source &arg) { typedef typename detail::array_to_pointer_decay<Source>::type NewSource; detail::lexical_stream<Target, NewSource> interpreter; Target result; if(!(… [View More]

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Boost's future, one big download?
by Steven Burns 09 Aug '06

09 Aug '06

When I read posts like "proposal: boost library for african insect classification" (joke) and things like that, I wonder what's going to happen to boost in the future. Some boost libraries are already too specific and this seems to be on the rise. Is boost going to be always a single download? Is boost's goal to become a "code wikipedia"? Thanks, Steven

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Exception Visitor
by Jeremy Day 09 Aug '06

09 Aug '06

All, A message a few days ago, along with my current reading of the book 'C++ Template Metaprogramming', piqued my interest in the idea of an "exception visitor". I put together a little something, and I'm wondering if people might be interested in my (rather poor, at the moment) code. Problem: When using exceptions it is very easy to end up with code that looks something like this: try { //Some code that might throw exceptions. } catch(std::logic_error&) { //Handle the … [View More]

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Inspect Tool Update (was: Boost regression testing status)
by Gennaro Prota 07 Aug '06

07 Aug '06

On Fri, 28 Jul 2006 02:19:38 +0200, Gennaro Prota <gennaro_prota(a)yahoo.com> wrote: >On Thu, 27 Jul 2006 14:23:31 -0500, Rene Rivera ><grafikrobot(a)gmail.com> wrote: > >>It's the false negatives that are worrisome. For example: >> >>const char * x = "//foo"; int x = min(10,20); >> >>Not that I think anyone would write such code. But strange things do >>happen :-) > >Yep. I have just committed a major update to the inspect tool. … [View More]

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[mpl] Integral Constant is over specified
by Andy Little 06 Aug '06

06 Aug '06

Hi, IMO the Integral Constant Concept is over specified in the mpl docs. What is the rationale behind the next<..> and prior <..> requirements? These seem to have little to do with an Integral Constant. Maybe they should rather be another Concept , such as Iterable? Where N is a model of Iterable: next<N>::type prior<N>::type Currently for example, mpl::bool_ is stated to be a model of Integral Constant, but it fails to meet the curently stated requirments, nor … [View More]

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array_count - preliminary submission
by Gennaro Prota 05 Aug '06

05 Aug '06

Hi guys, attached is a first cut at the array count facility I proposed here. It still lacks compile-fail tests and tests for the multidimensional case; and I made no attempt to extend it to tr::array<> (the main issue being supporting tr::array<>s with size 0 --it can be done, but the machinery involved would be something to be likely hidden from the user via a macro; instead, no macro is used so far). Any feedback appreciated, though likely only Dave will be interested ;) The … [View More]

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[quickbook] Including source files in the document
by Julio M. Merino Vidal 04 Aug '06

04 Aug '06

Hi, I've just started adding example programs to my SoC project and I was wondering if there was a way to bundle their code into the documentation (which I'm writing with Quickbook). Of course I can hyperlink to the source file, but this could be useless in printed documentation. Also I'd copy&paste the C++ code in the qbk file, but that is asking for trouble (desyncronization). Hence, I think it'd be useful to be able to include this code in the final document straight from the qbk … [View More]

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[ublas] Serious bug in mapped_vector_of_mapped_vector
by Matthias Troyer 03 Aug '06

03 Aug '06

There is a serious bug in the mapped_vector_of_mapped_vector spare matrix type. Rows containing only zero elements are not treated correctly in prod(). The following code should give a vector that contains only 1 in the last element. Instead prod() gives a vector containing 1 in each element. In debug mode this bug is found by the checks: Check failed in file boost/boost/numeric/ublas/detail/ vector_assign.hpp at line 371: detail::expression_type_check (v, cv) Aborted The bug … [View More]

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[endian] Comments on Endian 0.5
by Dave Dribin 02 Aug '06

02 Aug '06

Hello, I started a thread on Boost-users about the proposed endian library, but it's probably more suitable on the dev list. Here's a link to the thread in the archives: <http://lists.boost.org/boost-users/2006/07/20887.php> I see two issues with the library as of 0.5. First, the endian classes cannot be used in unions. And, second the classes cannot be used in variable argument lists. I'm attaching a patch to help resolve both of these issues. In order to be used in … [View More]

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