July 2010 - Boost - lists.preview.boost.org

spirit mini_c example 1 broken
by Dirk Griffioen 02 Jul '10

02 Jul '10

Hi, (Sorry if this is the wrong list) The mini_c example 1 in Boost.Spirit v2.3 seems to be broken: all I get is a Error! Expecting <statement-list> here: " int a = 2; And with some debugging added it says: <statement-list> <try>\n int a = 2;\n </try> <statement> <try>\n int a = 2;\n </try> <variable-declaration> <try>\n int a = 2;\n </try> <fail/> </variable-declaration> <assignment> <try>\n int a = 2;\n </try> <variable-reference> <try>\n int a = 2;\n </try> <fail/> </variable-reference> <fail/> </assignment> <fail/> </statement> <fail/> </statement-list> Error! Expecting <statement-list> here: " int a = 2; I am a bit confused now, as it is straight from the examples ... and my guess is it should work. Any hints? Best, Dirk

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svn-commit mail failing
by Thomas Heller 02 Jul '10

02 Jul '10

Hi, I just noticed that the svn commit mailing list seems to have some problems. The last commit notification I got was from revision 63466. The current revision is 63522. Can someone confirm?

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[intro] Preview: Introspection library
by Stefan Strasser 02 Jul '10

02 Jul '10

Hi, I'd be interested in comments on an introspection library I've been developing. there has been no "Is there any interest..."-e-mail yet, as it was started out of necessity in "namespace detail" of another library, so you're also welcome to express interest/disinterest in a library like this, without any specific comments. source code: https://svn.boost.org/trac/boost/browser/sandbox/intro/boost/intro/ the library defines a concept that exposes the members of a class, for introspection algorithms to work with. e.g. the "print" algorithm applied to a simple object implementing the concept yields the following results: intro::print(a,std::cout); ---- { A_base = { int member_of_base = 789; }; int a = 123; float b = 456.7; vector<int,class std::allocator<int> > vec = {2, 4, 6, 8, 10}; } --- other algorithms that are currently implemented: - apply_members[_binary]: apply a user-supplied functor to each member - apply_recursive: follow pointers, references, STL container elements, etc. - serialize: serialization of an object tree of 1M objects: 80 ms. Boost.Serialization: 330 ms. serialization of an object graph of 1M objects: 410 ms. Boost.Serialization: 2700 ms. - move: move-construct an object - reset_shared planned or not yet in the sandbox are deserialize, print_recursive, copy_deep, copy_shallow, equal_deep, equal_shallow. an implementation of the concept looks like this: template<class Mapping> friend void introspect(Mapping mapping,type<A>){ mapping (base_class<A_base>() ) (member<A,int ,&A::m_a>() ) (member<A,float ,&A::m_b>() ) (member<A,std::vector<int>,&A::m_vec>()) (); } members can also be associated with tags or data, and can be assigned semantics (e.g. polymorphic, shared/unique for pointers), but I won't go into too much detail for now. Best, Stefan

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[RFC] string inserter/extractor "q u o t i n g"
by Beman Dawes 01 Jul '10

01 Jul '10

This is a request for comments on a delimited string inserter/extractor facility for Boost. The initial motivation is a need for Boost.Filesystem class path inserters and extractors to handle paths with embedded spaces. The problems stems from standard library stream I/O not round-tripping strings with embedded spaces, so a general solution might be of interest. It is a bit surprising that Boost doesn't seem to already have such a utility. The general solution presented here follows very common practice as to the format: strings are enclosed in delimiters on output and the delimiters (if present) are stripped on input. In the external format, an escape character precedes itself or the delimiter character should either be present in the string. The default delimiter character is the double-quote (") and the default escape character is the backslash (\). These defaults can be overridden. Example: const std::string expected("foo\\bar, \" *"); std::cout << delimit(expected); std::string actual; std::stringstream ss; ss << delimit(expected); ss >> undelimit(actual); assert(expected == actual); The output to cout is "foo\\bar, \" *" A prototype is available at http://svn.boost.org/svn/boost/branches/filesystem3/boost/delimit_string.hpp. It is a header only implementation. Do you think this component, with suitable documentation, tests, etc., should become a part of Boost? If so, What library should it be part of? Seems too small to be a library all of its own. Where should the header live? What namespace should it be in? Are delimit() and undelimit() suitable names for the functions? Any other comments? Thanks, --Beman

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Regression tests machines
by Joel Falcou 01 Jul '10

01 Jul '10

I am managing some spare machine with reasonable performances and compiler selection that are basically underused at the moment (including various i64, AMD and PowerPC server blade) with both gcc and icc. I guessed they could be used to run the boost regression test on a dialy or weekly basis. I found out about the : http://www.boost.org/development/running_regression_tests.html page but I wanted to know if there is any speficic need in term of paltofrm/compiler coverage or if I can just run whatever and push the regression result up ?

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[BGL] Does BGL use Quickbook?
by Daniel Trebbien 01 Jul '10

01 Jul '10

Does BGL use Quickbook to generate the HTML pages or are the HTML pages hand-coded?

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[Boost.Test] error when running
by FIXED-TERM Lay Seak Meng (CR/RTC1.2-NA) 01 Jul '10

01 Jul '10

Hi, I am new to Boost Test framework. I wrote a small test case and put it as a post build event. #include "stdafx.h" BOOST_AUTO_TEST_CASE(Test1) { BOOST_REQUIRE(false); } I got this error after linking. 1>Running Unit Tests 1>'c:\Documents' is not recognized as an internal or external command, 1>operable program or batch file. Anyone knows how to fix this? Thanks

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