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[date_time] Stricter stream input validation
by Johan Nilsson 02 Oct '06

02 Oct '06

Hi, is there any way to force ptime stream input fail when the time duration part is not between 00:00:00 and 23:59:59? I'm using a time_input_facet with a formatting string of "%Y-%m-%d %H:%M:%S" imbued into a streams with exceptions(failbit) enabled. I'd like an exception raised when time parts such as 25:00:00 are parsed instead of getting the next day's date. I guess I could use regex validation, but was hoping to have support for this in the date_time library. Currently using cvs boost (RC_1_34_0). Thanks / Johan

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[date-time]time zone input
by Sean Huang 02 Oct '06

02 Oct '06

Jeff, Do you plan to add the time zone input support to date-time anytime soon. Specifically, I am asking for using "%q" and "%Q" on input. Thanks, Sean

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Array of smart pointers to base class
by scott velasquez 02 Oct '06

02 Oct '06

Here is what I desire to have in my GUI library as it pertains to boost: 1. No raw widgt pointers. Container functions should take a reference to a base class smart pointer type rather then accepting raw pointers of the base class type. 2. Containers store an array of smart pointers of the base GUI widget type. This is needed because containers can contain many widget derived types. I'm just showing the class code that matters; Normally, you would have constructors, destructors, access label, etc. class OWidget; class ODerivedWidget : public OWidget; class OWidgetContainer : public OWidget { public: void Add( boost::shared_ptr<OWidget>& widget ) { mWidgets.pushback(widget); } std::vector<boost::shared_ptr<OWidget>> mWidgets; } int main(void) { OWidgetContainer root; // Works just fine since the types match boost::shared_ptr<OWidget> base(new OWidget()); root.Add(base); // Doesn't work since the Add() function can't convert ODerivedWidget shared pointer to OWidget shared pointer type. boost::shared_ptr<ODerivedWidget> derived(new ODerivedWidget()); root.Add( derived); } Is this even possible? I've read about boost::any and boost:variant and while that might solve my problem of storing smart pointers of differing types, it doesn't allow me to pass smart pointers of derived types. Any ideas/suggestions would be GREATLY appreciated! -scottv

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Re: [Boost-users] [boost] [spirit] 1.8.4 release candidate + roadmap
by Hartmut Kaiser 01 Oct '06

01 Oct '06

Arkadiy Vertleyb wrote: > Just a few questions to clear some confusion: > > 1) Is Spirit 1.8.4 the same Spirit that is currently in Boost CVS? Yes, at least in the RC_1_34_0 branch. > 2) Which version of Boost does Spirit 1.8.4 use? Any resonable (>= 1.31). The miniboost contained in the Spirit 1.8.4 release is based on Boost 1.33.1 (but we will re-release Spirit after V1.34 has been released). > 3) Which version of Spirit will be a part of Boost 1.34? 1.8.4, to avoid confusion we probably will bump the version, though. HTH Regards Hartmut > > Regards, > Arkadiy > > > > _______________________________________________ > Unsubscribe & other changes: > http://lists.boost.org/mailman/listinfo.cgi/boost

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Documentation file line endings problem
by Tjernstrom, Staffan 01 Oct '06

01 Oct '06

Folks, I'm throwing this query out in this medium (as a newbie) as I'm unsure of if there is a better forum for the question. It would appear that in the 1.3.1 Windows self-extracting exe, that some .html file(s) [the one I've come across to date is boost/lib/numeric/conversion/doc/converter_policies.html] have got 'extra' ^M characters in them over and beyond the normal Windows line ending. I assume this is an artifact of some kind of cross-platform / cvs activity? The net result is that these files cannot (as they stand) be imported into a multi-platform subversion repository (at least from a Windows client), as the line endings are inconsistent. This issue re-occurs in a few test files, particularly one for Unicode testing which apparently deliberately has bad line endings. Rgds Staffan Tj. Staffan Tjernström | Sr. Programmer - Market Data Systems | www.esignal.com <http://www.esignal.com> eSignal, a division of Interactive Data Corporation (NYSE: IDC) 3955 Point Eden Way | Hayward, CA 94545-3720 | 510.723.1723 | FAX: 510.266.6100 DISCLAIMER: This message (including any files transmitted with it) may contain confidential and / or proprietary information, is the property of Interactive Data Corporation and / or its subsidiaries and is directed only to the addressee(s). If you are not the designated recipient or have reason to believe you received this message in error, please delete this message from your system and notify the sender immediately. An unintended recipient's disclosure, copying, distribution or use of this message, or any attachments, is prohibited and may be unlawful.

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[function] How do you bind two boost::function objects together?
by Jason House 01 Oct '06

01 Oct '06

I'm trying to convert the input argument to a function object using a small helper function object. The code below looks relatively simple, but it doesn't seem to compile. Any ideas what could be wrong? template<typename inputType, typename outputType> boost::function<outputType (int)> convert(boost::function<outputType (inputType)> &object_to_convert){ boost::function<intputType (int)> input_converter(...); // The following fails to compile boost::function<outputType (int)> converted_function (boost::lambda::bind(object_to_convert, input_converter)); return converted_function }

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[Property Tree] Latest version and CVS
by Chris Weed 01 Oct '06

01 Oct '06

Hi, I am interested in using the new Property Tree library, and I was wondering where I can get the latest version. Chris

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[Date_Time]A better algorithm for from_undelimited_string(string)
by 张沈鹏 01 Oct '06

01 Oct '06

It's seems faster than the algorithm now in use. The execute file and project file please see the attach. DateValidate cost : 00:00:17.765546 boost_date_validate cost : 00:00:50.232232 Below is cpp source of the algorithm and test ---------------------------------------------------------------------------------------- #include <boost/lexical_cast.hpp> #include <stdio.h> #include <string.h> #include <stdlib.h> #include <iostream> #include <string> #include <boost/date_time/posix_time/posix_time.hpp> using namespace std; using namespace boost; using namespace boost::posix_time; using namespace boost::gregorian; int create_date() { int year=rand() %200+1900; int month=rand() %20; int day=rand() %40; return year*10000+month*100+day; } void date_validate(int date) { static int daysOfMonth[] = { 0,31,28,31,30,31,30,31,31,30,31,30,31 }; int monthDay = date % 10000; if (monthDay >= 1300) throw bad_month(); if (monthDay > 1231) throw bad_day_of_month(); if (monthDay == 229) { int year = date / 10000; if ( (year % 4) != 0) throw bad_day_of_month(); if (year %100 == 0 && year % 16 != 0) throw bad_day_of_month(); } int month = monthDay / 100; int day = monthDay % 100; if (! (day > 0 && day <= daysOfMonth[month]) ) throw bad_day_of_month(); } bool DateValidate (string date) { try { date_validate( lexical_cast<int> (date)); return true; } catch (...) { return false; } } bool boost_date_validate (string date) { try { from_undelimited_string (date); return true; } catch (...) { return false; } } int main() { int n=1000000; ptime createDateBegin (microsec_clock::local_time() ); for (int i=0;i<n;i++) { int r=create_date(); string t=lexical_cast<string> (r); } ptime createDateEnd (microsec_clock::local_time() ); time_duration createTime=createDateEnd-createDateBegin; cout<<"create_date cost : "<<createDateEnd-createDateBegin<<"\n"; createDateBegin=microsec_clock::local_time(); for (int i=0;i<n;i++) { int r=create_date(); string t=lexical_cast<string> (r); DateValidate (t); } createDateEnd=microsec_clock::local_time(); cout<<"DateValidate cost : "<<createDateEnd-createDateBegin-createTime<<"\n"; createDateBegin=microsec_clock::local_time(); for (int i=0;i<n;i++) { int r=create_date(); string t=lexical_cast<string> (r); boost_date_validate (t); } createDateEnd=microsec_clock::local_time(); cout<<"boost_date_validate cost : "<<createDateEnd-createDateBegin-createTime<<"\n"; cin.get(); return 0; }

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[date_time] Warnings in VC8
by Arkadiy Vertleyb 01 Oct '06

01 Oct '06

Hi, I am getting a few "possible loss of data" warnings while using the datetime library. For example, VC8 complains about the following code in microsec_clock.hpp: boost::uint64_t filetime = ... ... boost::uint32_t sub_sec = (filetime % 10000000) / 10; // microseconds The compiler also complains about similar issue in from_ftime. Is this a known issue? Regards, Arkadiy

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[date_time/posix_time] [Fwd: Warnings with microsec_time_clock.hpp with VC8.0]
by Bill Somerville 01 Oct '06

01 Oct '06

-- Bill Somerville This message has been scanned by MailController - www.MailController.altohiway.com

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