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RE: [boost] Announcement: Upcoming formal review of FC++
by Powell, Gary 25 Feb '04

25 Feb '04

A quick comment regarding the documentation on monads. If the authors think that the monad stuff is ready for boost, the documentation should come with it and not reside on the FC++ web site. Other than that the documents look good... on to the code.. -Gary-

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borland workaround needed
by Gennadiy Rozental 25 Feb '04

25 Feb '04

Hi, Could anybody suggest workaround for Internal error I am getting when trying to compile using Borland command line tools with following code: template<class PropertyType> class class_property { protected: PropertyType value; }; template<class PropertyType> class readwrite_property : public class_property<PropertyType> { typedef class_property<PropertyType> base; using base::value; // <------- right here }; Gennadiy.

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RE: [boost] Re: boost::any: explicit constructor?
by Bjorn.Karlsson＠readsoft.com 25 Feb '04

25 Feb '04

> From: Edward Diener [mailto:eddielee@tropicsoft.com] > > The intention was to call do_somethin on 'v.value()' but > non-explicit > > ctor is happy to accept 'variable', after which > 'do_something' breaks. > > This is a programming error, not an error in boost::any. Absolutely, but it's an error that could have been detected by the compiler given an explicit constructor. [snip] > While I am not against syntactic sugar which make it > easier to use > C++ constructs, I am against making a constructor explicit > just to keep > programmers from making errors. Isn't keeping programmers from making errors a Good Thing? For me, that's exactly the reason why boost::any's constructor _should_ be explicit. Bjorn

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Re: The art of naming namespaces [was: Re: algorithms namespace]
by Bjorn.Karlsson＠readsoft.com 25 Feb '04

25 Feb '04

> From: Thorsten Ottosen [mailto:nesotto@cs.auc.dk] > > * Some names work "best" in plural (like signals, > type_traits, iterators, > > operators); this is of course very much IMHO. > > are they the names of namespaces? Signals is (and type_traits has such a namespace [albeit only in detail]), the others are the library names (living in the root boost:: namespace). > > * Just "file" seems a bit restrictive to me, but when I > think about the > > namespace "files" I read "files 'n other related stuff, too". > > then maybe it should be namespace io? Just like a big namespace for > algorithms, io > could hold file handling, zip streams, formatters etc. Yes, that's definitely an interesting option. Bjorn

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boost::any: explicit constructor?
by Vladimir Prus 25 Feb '04

25 Feb '04

Hi, I just had a couple of bugs caused by the fact that constructor of boost::any is not explicit. For example: void do_something(boost::any& v) { ... } class variable { ///// boost::any& value() {} }; variable v; do_something(v); The intention was to call do_somethin on 'v.value()' but non-explicit ctor is happy to accept 'variable', after which 'do_something' breaks. Anybody has an opinion? Is non-explicit ctor really necessary? - Volodya

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[config] fix for BCB and BOOST_NO_MEMBER_TEMPLATE_FRIENDS
by Pavel Vozenilek 25 Feb '04

25 Feb '04

I believe config macro BOOST_NO_MEMBER_TEMPLATE_FRIENDS should be defined for BCB 6. Currently it is defined only for BCB 5.5.1 and less but with BCB 6: - compiling test file boost_no_mem_templ_frnds.cxx fails, - the problem shows in Serialization library too. So I recommend to change borland.hpp to define this macro for BCB 6 (and likely for Kylix which is simply BCB6 ported to Linux). BCB6 patch 4 == 0x564 Kylix = 0x570 /Pavel

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Re: [utility] question on prior(x,n)
by Bjorn.Karlsson＠readsoft.com 25 Feb '04

25 Feb '04

> From: Daniel Frey [mailto:daniel.frey@aixigo.de] > > > > Well, you came up with the 2-arg version. > > That was Daniel Wallin (too many Daniels error?). I guess this also > explains why I had the feeling we were talking past each > other a bit :) Heh, according to the docs it was Daniel Walker. This name-calling is getting interesting. ;-) Bjorn

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Re: [utility] question on prior(x,n)
by Bjorn.Karlsson＠readsoft.com 25 Feb '04

25 Feb '04

> From: David Abrahams [mailto:dave@boost-consulting.com] > > See counting_iterator for inspiration as to why this might be useful. Got it, thanks. Perhaps these type requirements should be spelled out in the docs (proposed patch below)? And maybe is_full_iterator_traits in detail/iterators.hpp could be slightly changed and turned into a first-class traits "is_iterator", which would then be used for dispatching next/prior calls to std::advance when applicable? Although this would work, I'm not sure that the added dependencies and complexity are worth it - if possible, I think that dropping the two-argument versions of next and prior would be best. Bjorn [Note: The most interesting change to the doc are the following four lines. The one-argument version of next() and prior() can be used with any type that provides operator++() and operator--(), respectively. The two-argument version of next() and prior() can be used with any type that provides operator+() and operator-(), with the exception of iterator types, which only require operator++() and operator--() for both versions. ] *** utility.htm.orig Wed Feb 25 11:47:07 2004 --- utility.htm Wed Feb 25 11:48:17 2004 *************** *** 41,61 **** T next(T x) { return ++x; } template <class T, class Distance> ! T next(T x, Distance n) ! { ! std::advance(x, n); ! return x; ! } template <class T> T prior(T x) { return --x; } template <class T, class Distance> ! T prior(T x, Distance n) ! { ! std::advance(x, -n); ! return x; ! }</pre> </blockquote> Usage is simple: <blockquote> --- 41,54 ---- T next(T x) { return ++x; } template <class T, class Distance> ! T next(T x, Distance n); template <class T> T prior(T x) { return --x; } template <class T, class Distance> ! T prior(T x, Distance n); ! </pre> </blockquote> Usage is simple: <blockquote> *************** *** 66,71 **** --- 59,68 ---- The distance from the given iterator should be supplied as an absolute value. For example, the iterator four iterators prior to the given iterator <code>p</code> may be obtained by <code>prior(p, 4)</code>. + The one-argument version of next() and prior() can be used with any type that provides + operator++() and operator--(), respectively. The two-argument version of next() and prior() + can be used with any type that provides operator+() and operator-(), with the exception of + iterator types, which only require operator++() and operator--() for both versions. Contributed by <a href="../../people/dave_abrahams.htm">Dave Abrahams</a>. Two-argument versions by Daniel Walker. <h2><a name="Class_noncopyable">Class noncopyable</a></h2> Class noncopyable is a base class.  Derive your own class

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XSL regression reporting changes
by Misha Bergal 25 Feb '04

25 Feb '04

I have checked in the modifications to split the failed test logs HTML file (links.html) into on HTML file per test log. The regression testers using xsl_reports will need to update their upload scripts. -- Misha Bergal MetaCommunications Engineering

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warning when using borland toolset
by Gennadiy Rozental 25 Feb '04

25 Feb '04

I am getting following warning when I try to compile using Borland toolset: ...boost\tools/build\v1\borland-tools.jam:182: in include-tools warning: unknown rule W32_GETREG ...boost\tools/build\v1\boost-base.jam:760: in relevant-features ...boost\tools/build\v1\boost-base.jam:828: in select-properties ...boost\tools/build\v1\boost-base.jam:799: in variant ...boost\tools/build\v1\features.jam:179: in boost-build ...boost\boost-build.jam:16: in module scope ...boost\tools/build\v1\borland-tools.jam:182: in include-tools (actually repeated multiple times) any suggestions? Gennadiy

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