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error C2668: 'abs' : ambiguous call to overloaded function
by Black Ice 06 Jan '03

06 Jan '03

boost version 2002-01-02 VC 7.1 Final Beta "error C2668: 'abs' : ambiguous call to overloaded function" when compile following code. The same code can be built successfully in vc6. Any suggestion are appreciated. #define DATE_TIME_INLINE #define BOOST_DATE_TIME_POSIX_TIME_STD_CONFIG #include <iostream> #include <string> using namespace std; #include <boost/date_time/gregorian/gregorian.hpp> #include <boost/date_time/posix_time/posix_time.hpp> using namespace boost::gregorian; using namespace boost::posix_time; void testDateTime2() { date d(2002, Nov, 1); //an arbitrary date ptime t1(d, hours(5) + nanosec(100));//date + time of day offset ptime t2 = t1 - minutes(4)+seconds(2); ptime now = second_clock::local_time(); //use the clock //Get the date part out of the time date today = now.date(); date tommorrow = today + date_duration(1); ptime tommorrow_start(tommorrow); //midnight cout << "d is " << to_iso_extended_string(d) << endl; cout << "t1 is " << to_iso_extended_string(t1) << endl; cout << "t2 is " << to_iso_extended_string(t2) << endl; cout << "now is " << to_iso_extended_string(now) << endl; cout << "today is " << to_iso_extended_string(today) << endl; cout << "tommorrow is " << to_iso_extended_string(tommorrow) << endl; cout << "tommorrow_start is " << to_iso_extended_string(tommorrow_start) << endl; //starting at current time iterator adds by one hour time_iterator titr(now,hours(1)); for (; titr < tommorrow_start; ++titr) { cout << to_iso_extended_string(*titr) << endl; } } -- /*******************/ ×ÔÓÉ£šliberty£©ÎÞ·ÇŸÍÊÇÕâÑùÒ»ÖÖ³ÐÅµ£ºÃ¿žöÈËœ«»áµÃµœÒ»ÖÖ±£ÕÏ£¬±£ÕÏÎÒÃÇ¿ÉÒÔÓë ÈšÍþ¡¢¶àÊý¡¢Á÷Ë×Œ°ÓßÂÛµÄÓ°ÏìÏà¿¹ºâ¡£ /*******************/

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RE: [Boost-Users] Re: error C2668: 'abs' : ambiguous call to overloaded function
by Jeff Garland 06 Jan '03

06 Jan '03

> After I move the line 'using std namespace', the error still occurs. > The error occurs in file date_time/time_duration.hpp, line 66. > min_type minutes() const > { > return std::abs(((ticks() / (60*rep_type::res_adjust())) % 60)); > } > It seems like the abs function declared in boost/date_time/compiler_config. hpp will not be included due to the macro configuration. The relavant code snippet is: //boost/date_time/compiler_config.hpp //Work around compilers that don't have std::abs #if (__GNUC__ <= 3)|| (defined(BOOST_MSVC) && _MSC_VER <= 1200) # define BOOST_NO_LONG_LONG_ABS #endif #if defined(BOOST_NO_LONG_LONG_ABS) namespace std { template <typename T> // JDG [7/6/02 made a template] inline T abs(T x) { return x < 0 ? -x : x; } } #endif You might try altering this so that the function will be defined. Something like (line 22) #if (__GNUC__ <= 3)|| defined(BOOST_MSVC) should do the trick. The only thing is that past testing with newer versions of MSVC did not require this so I'm a bit suprised that this is needed. This will only work if the problem is that the compiler is trying to convert the underlying type boost::int64_t into a long or another type because it lacks a std::abs for this type. Jeff

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Re: [Boost-Users] Re: error C2668: 'abs' : ambiguous call to overloade
by martynl＠cix.compulink.co.uk 06 Jan '03

06 Jan '03

In-Reply-To: <av5tpc$fmj$1(a)main.gmane.org> Black Ice, > After I move the line 'using std namespace', the error still occurs. > The error occurs in file date_time/time_duration.hpp, line 66. > min_type minutes() const > { > return std::abs(((ticks() / (60*rep_type::res_adjust())) % 60)); > } For VC++ 7.1, we've enabled by default conformant overloads of abs that were previously disabled by default. As a result, you'll need to cast the result of your math to a specific type to ensure you get the abs you want. Martyn Lovell Software Architect Visual C++ Team - Libraries email: lnytram(a)tfosorcim.moc [Spam-avoidance: reverse each word in the email address before use] This posting is provided "AS IS" with no warranties, and confers no rights.

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Compile error when build boost with vc 7 and vc 7.1
by Black Ice 04 Jan '03

04 Jan '03

The last version of boost has got by CVS. set BOOST_ROOT=d:\boost\boost set VC7_ROOT=D:\Program Files\Microsoft Visual Studio .NET 2003\Vc7 bjam "-sTOOLS=vc7" Command line error D2016 : '/Za' and '/Ze' command-line options are incompatible -- /*******************/ ×ÔÓÉ£šliberty£©ÎÞ·ÇŸÍÊÇÕâÑùÒ»ÖÖ³ÐÅµ£ºÃ¿žöÈËœ«»áµÃµœÒ»ÖÖ±£ÕÏ£¬±£ÕÏÎÒÃÇ¿ÉÒÔÓë ÈšÍþ¡¢¶àÊý¡¢Á÷Ë×Œ°ÓßÂÛµÄÓ°ÏìÏà¿¹ºâ¡£ /*******************/

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auto_array?
by Duane Murphy 04 Jan '03

04 Jan '03

Is there a class filling in the missing piece to the memory management puzzle for an auto_array? We have: scoped_ptr and scoped_array, shared_ptr and shared_arry, and auto_ptr. I would like to have an auto_array. Basically the feature that is missing is to create an array, initialize it and then transfer ownership as a way of managing exceptions during the initialization phase. For the time being I am using a shared_array. Thank for any suggestions. ...Duane

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Re: [Boost-Users] Re: Re: Re: Slight Alteration to Boost Directory Structure
by William E. Kempf 04 Jan '03

04 Jan '03

> From: "Paul Mensonides" <yg-boost-users(a)m.gmane.org> > "William E. Kempf" <wekempf(a)cox.net> wrote in message > news:20030108174453.YIAW22825.lakemtao04.cox.net@smtp.east.cox.net... > > > > That is not what he (or I) means. He is suggesting that the path to > > > "shared_ptr.hpp" should be "$INCLUDE/boost/shared_ptr.hpp" rather than > > > "$INCLUDE/boost/boost/shared_ptr.hpp", which is the way it is now. > > > Everything would still be the same for including headers except that > only a > > > single search path is necessary to setup with the compiler. > > > > That's the way it is now *only* if you set your include directories > incorrectly. When they are properly set to $BOOST_ROOT then it's only > <boost/shared_ptr.hpp>, not <boost/boost/shared_ptr.hpp>. > > ...which is precisely the point. You have to have a separate include > directory for Boost, rather than a single directory which contains various > libraries. I.e. it would be nice to have a directory structure like this: > > $INCLUDE/ > Loki/*.* > Boost/*.* > > And then have only a single header directory: $INCLUDE. I'm not talking > about the paths in the source code (i.e. <boost/shared_ptr.hpp>); I'm > talking about the include directories that the compiler searches, which is > external to the source code. That still misses the point. Boost currently won't help you to install the library, but installation certainly wouldn't entail copying the entire $BOOST_ROOT tree to the $INCLUDE directory on your system. You'd only copy the $BOOST_ROOT/boost tree there. William E. Kempf wekempf(a)cox.net

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RegEx: (?= ) and (?! )
by Yutaka Emura <yutaka＠emurasoft.com> 02 Jan '03

02 Jan '03

Hi, I am using RegEx in Boost v1.29.0. (?= ) and (?! ) expressions do not seem to work at a certain condition. In the following example, "(?=a)b" should match "b" in "xyzabcdefg", but does not. Similarly, "(?!a)b" should not match "b" in "xyzabcdefg" but it does. Can please let me know what is wrong? Thank you for your reply in advance. Yutaka Emura --------- boost::regex expression; boost::match_results<std::string::const_iterator> subexp; expression.assign("(?=a)b", boost::regbase::perl); if (boost::regex_search((std::string::const_iterator)"xyzabcdefg", (std::string::const_iterator)"xyzabcdefg" + 10, subexp, expression, boost::match_default)) { { // should go here } else { // goes here } expression.assign("(!=a)b", boost::regbase::perl); if (boost::regex_search((std::string::const_iterator)"xyzabcdefg", (std::string::const_iterator)"xyzabcdefg" + 10, subexp, expression, boost::match_default)) { { // goes here } else { // should go here }

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concept check warnings
by s_j_turner <s_j_turner＠yahoo.co.uk> 02 Jan '03

02 Jan '03

FWIW, I just started looking at Jeremy Siek's concept checking tools, and my compiler(*) came up with a warning about name hiding which is trivial to fix. I was using ContainerConcept, and it uses a method argument with the same name as a data member. The fix looks like: *** concept_check.hpp Fri Dec 27 16:51:51 2002 --- concept_check.hpp Thu Jan 2 16:13:03 2003 *************** *** 708,719 **** function_requires< AssignableConcept<Container> >(); const_constraints(c); } ! void const_constraints(const Container& c) { ! i = c.begin(); ! i = c.end(); ! n = c.size(); ! n = c.max_size(); ! b = c.empty(); } Container c; bool b; --- 708,719 ---- function_requires< AssignableConcept<Container> >(); const_constraints(c); } ! void const_constraints(const Container& cc) { ! i = cc.begin(); ! i = cc.end(); ! n = cc.size(); ! n = cc.max_size(); ! b = cc.empty(); } Container c; bool b; There are a few other classes in there which do the same thing, but this is the only one I'm currently using. --- (*) Sun Forte 6.2.1

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RE: [Boost-Users] Re: Simple boost program throws exception
by Tom Matelich 02 Jan '03

02 Jan '03

I don't have too much advice except a) try the latest boost b) put a try/catch block around the code, figure out what function is calling and what exception is being thrown. > -----Original Message----- > From: ksaleh2 <ksaleh2(a)yahoo.com> [mailto:ksaleh2@yahoo.com] > Sent: Wednesday, January 01, 2003 9:21 AM > To: Boost-Users(a)yahoogroups.com > Subject: [Boost-Users] Re: Simple boost program throws exception > > > Hi, > > On December 7th I've posted this message, which unfortunately didn't > get any reply. I'm not a professional programmer, so forgive me if it > is a silly question, but your cooperation will help me understand > boost better, thank you and happy new year to all. > > --- In Boost-Users(a)yahoogroups.com, "ksaleh2 <ksaleh2@y...>" > <ksaleh2@y...> wrote: > > I'm trying boost for the first time on Codewarrior 8.0 for windows. > > The Boost version is 1.25.1 from the "Boost Graph Library" > > accompanying CD. The offensive code is : > > > > #include <boost/config.hpp> > > #include <iostream> > > > > #include <boost/graph/adjacency_list.hpp> > > > > using namespace boost; > > using namespace std; > > > > > > int main() > > { > > typedef adjacency_list<vecS,vecS,directedS, > > property < vertex_name_t, char > >,property<edge_weight_t,double> > > > Graph; > > > > property_map < Graph, vertex_name_t >::type name_map ; > > property_map < Graph, edge_weight_t >::type value_map ; > > > > Graph g; > > > > typename graph_traits<Graph>::vertex_descriptor a,b; > > > > a = add_vertex(g); name_map[a] = 'a'; > > b = add_vertex(g); name_map[b] = 'b'; > > > > typename graph_traits<Graph>::edge_descriptor ed; > > bool inserted; > > > > tie(ed, inserted) = add_edge(a, b, g); > > value_map[ed] = 1.2; > > > > > > return 0; > > } > > > > > > If the second template parameter for class VertexListS is replaced > > with listS it compiles and run normally. > > > > typedef adjacency_list<vecS,listS,directedS, > > property < vertex_name_t, char > >,property<edge_weight_t,double> > > > Graph; > > > > Can you please advise why? > > > > Best Regards > > > > ------------------------ Yahoo! Groups Sponsor > ---------------------~--> > Flexible Keyboard is the ideal accessory for PDA users that > are on the move. > http://us.click.yahoo.com/dCBVZC/WnCFAA/xGHJAA/EbFolB/TM > -------------------------------------------------------------- > -------~-> > > Info: <http://www.boost.org> > Wiki: <http://www.crystalclearsoftware.com/cgi-bin/boost_wiki/wiki.pl> > Unsubscribe: <mailto:boost-users-unsubscribe@yahoogroups.com> > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ ----------------------------------------------------------------------- DISCLAIMER: Information contained in this message and/or attachment(s) may contain confidential information of Zetec, Inc. If you have received this transmission in error, please notify the sender by return email. -----------------------------------------------------------------------

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Error in testing tuple
by agiatojon <JonAgiato＠nyc.rr.com> 01 Jan '03

01 Jan '03

Happy Holidays to everyone! I am getting aquainted with the tuple class but am encountering the following error: c:\BGL\boost_1_29_0\boost\tuple\tuple_comparison.hpp(119): error C2027: use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>' with [ x=false ] with the following program: /** * tupleTest.cpp * Test of Boost library class tuple * A tuple is a fixed size collection of elements * Stored objects may be of different types * Current support of tuples with 0-10 objects * Objects may be any valid C++ type except void and function types * Jon Agiato * 12-23-02 */ #include <iostream> using std::cout; using std::cin; using std::ostream; using std::cerr; #include <cstdlib> #include <boost/tuple/tuple.hpp> using boost::tuple; // both tuple_io.hpp and tuple_comparison.hpp include tuple.hpp // tuple_io must be included for tuple input and output operators #include <boost/tuple/tuple_io.hpp> // tuple_comparison.hpp must be included for comparison operators #include <boost/tuple/tuple_comparison.hpp> #include <string> using std::string; #include <exception> using std::exception; class A { friend ostream &operator<<(ostream &output, const A &a) { output << a.S; return output; } public: A(string s = "Testing"):S(s) {;} string S; }; class B { friend ostream &operator<<(ostream &output, const B &b) { output << b.D; return output; } public: B(double d = 3.501):D(d) {;} double D; }; class C { friend ostream &operator<<(ostream &output, const C &c) { output << c.state; return output; } public: C(bool st = true):state(st) {;} double state; }; int main() { try { tuple<A, B, C> testTuple; cout << testTuple << '\n'; tuple<B, A> test2Tuple; if(testTuple == test2Tuple) cout << testTuple << " is equal to " << test2Tuple << '\n'; else cout << testTuple << " is not equal to " << test2Tuple << '\n'; cout << "Press enter to exit..."; cin.get(); return EXIT_SUCCESS; } catch(const exception &E) { cerr << "Standard library exception: " << E.what() << '\n'; return EXIT_FAILURE; } catch(...) { cerr << "Unknown exception thrown.\n"; return EXIT_FAILURE; } } I am using Visual Studio.NET Enterprise Architect Thanks! Jon Agiato JonAgiato(a)nyc.rr.com

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