- Boost-users - lists.boost.org

[BGL] kolmogorov_max_flow: vertices output colors
by Olivier Tournaire 30 Oct '10

30 Oct '10

Hi all, I am currently havong a problem with the Kolmogorov max flow usage in the BGL. The probelm is that at the end of the algorithm, some vertices are gray. What is there real status: do they belong to the tree or sink. None of both? Why? Hope you could help Regards, Olivier

2 1

warnings with VS2008 and Boost 1.44
by gast128 29 Oct '10

29 Oct '10

Dear all, we try to use Boost 1.44 with our applications and we got the follow warnings: -gamma.hpp(1053) : warning C4701 -token_functions.hpp(220) : warning C4127 -find_format_store.hpp(74) : warning C4100 We have here a 'treat warning as error' polciy, so in effect we may have to add an extra header for some libraries which disables the warning locally and then includes the Boost library header (thru the #pragma push / pop mechanism).

3 6

help using String Algorithms search and replace
by John Dlugosz 29 Oct '10

29 Oct '10

I need to (among other tasks) un-encode some substitutions in a string that use URL-encoding. That is, locate all occurrences of "%nn" and replace with the character whose ordinal is 0xnn. I looked at boost/algorithm/string.hpp, but the instructions are not at all clear. The tutorial/example is too simple, and the reference it points to for more info is quite unenlightening. Could someone show me how to do that, or point to an example that's more along those lines? Thanks, --John ===begin corporate footer=== TradeStation Group, Inc. is a publicly-traded holding company (NASDAQ GS: TRAD) of three operating subsidiaries, TradeStation Securities, Inc. (Member NYSE, FINRA, SIPC and NFA), TradeStation Technologies, Inc., a trading software and subscription company, and TradeStation Europe Limited, a United Kingdom, FSA-authorized introducing brokerage firm. None of these companies provides trading or investment advice, recommendations or endorsements of any kind. The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from any computer.

2 2

compile-time string literal manipulation?
by Stiles Watson 29 Oct '10

29 Oct '10

I'm a new to metaprogramming so please bare with the stupid questions: I have a requirement to convert string literals to a specified format at compile-time. In otherwords, given a literal like "3A689", I need to verify the value and, if not valid, generate a correct value such that: //pseudocode const char ch[] = verify<"3A689">::valid_value; would result in something like: const char ch[] = "03A689X"; Can I use Boost to write a template to do this? I know that is extremely vague, but does anyone have any thoughts? Thanks.

7 7

boost MPI please recommend a debugger for MPI
by Jack Bryan 29 Oct '10

29 Oct '10

Hi, Would you please recommend a debugger, which can do debugging for parallel processes on Open MPI systems ? I hope that it can be installed without root right because I am not a root user for ourMPI cluster. Any help is appreciated. Thanks Jack Oct. 28 2010

2 1

Re: [Boost-users] Boost-users Digest, Vol 2525, Issue 4
by Romeo Macapobre 28 Oct '10

28 Oct '10

> * Spirit 2.x is fully attributed, while Spirit 1.x is not. What does "fully attributed" mean? -- apprenons francais [rmacapobre-french.blogspot.com] apprenons max [rmacapobre.blogspot.com]

1 0

[date_time] POSIX time zones
by david.mcminn＠intelligentwellcontrols.com 28 Oct '10

28 Oct '10

Hi, I'm looking at using the Boost date_time library in an upcoming project and found a few inconsistencies when handling POSIX timezones. The date_time library seems to interpret the offset in a POSIX timezone string using the opposite sign as given in the standards. It also appears to use the DST offset as an offset from it's own local time, rather than the offset from UTC as specified in the standard. And obviously when calling to_string() will output the string with the incorrect values, even if you do fudge the values before creating the object. There was another query about this previously that went unanswered: http://lists.boost.org/boost-users/2009/11/53828.php Is there anyone maintaining the library, or somewhere to report bugs? Or is it just left as an exercise to the user to change? Thanks.

1 0

[regex] BOOST_REGEX_MATCH_EXTRA not working?
by Christian Henning 28 Oct '10

28 Oct '10

Hi there, pretty new to boost::regex and though I'm just toying around with the documentation and some basic test code. The following code crashes when setting the BOOST_REGEX_MATCH_EXTRA symbol. #include <iostream> #include <boost/regex.hpp> void print_captures( const std::string& regx , const std::string& text ) { boost::regex e( regx ); boost::smatch what; std::cout << "Expression: \"" << regx << "\"\n"; std::cout << "Text: \"" << text << "\"\n"; // crash occurs in the next statement if( boost::regex_match( text, what, e, boost::match_extra )) { unsigned int i,j; std::cout << "**Match found ** \n Sub-Expressions:\n"; for( i = 0; i < what.size(); ++i ) { std::cout << " $" << i << " = \"" << what[i] << "\"\n"; } std::cout << " Captures:\n"; for( i = 0; i < what.size(); ++i ) { std::cout << " $" << i << " = {"; for( j = 0; j < what.captures(i).size(); ++j ) { } } } } int _tmain(int argc, _TCHAR* argv[]) { print_captures( "(.*)bar|(.*)bah", "abcbar" ); return 0; } I'm using MSVC10 express. Am I doing something wrong? Regards, Christian

2 2

Are memory leaks reported by Boost.Test Microsoft Memory Leak Detection Enabling spurious or real?
by Paul A. Bristow 28 Oct '10

28 Oct '10

I've just added some code (ready for Inverse Gaussian distribution in preparation for Boost.Math). When I added one new section of kosher-looking C++ code, I started to see memory leaks reported: For example: *** No errors detected Detected memory leaks! Dumping objects -> {3485} normal block at 0x003611B0, 42 bytes long. Data: <class boost::mat> 63 6C 61 73 73 20 62 6F 6F 73 74 3A 3A 6D 61 74 {3484} normal block at 0x003635A0, 8 bytes long. Data: < 6 46 > B0 11 36 00 F8 34 36 00 ... But no filename is given as promised by http://msdn.microsoft.com/en-us/library/e5ewb1h3%28v=VS.80%29.aspx So I'm puzzled if/where I should look for a problem. (occurs for both debug and release) Or is this spurious? Should I just suppress the warnings? Paul --- Paul A. Bristow, Prizet Farmhouse, Kendal LA8 8AB UK +44 1539 561830 07714330204 pbristow(a)hetp.u-net.com

3 3

Checking if a stand-alone function exists
by Ioannis Papadopoulos 28 Oct '10

28 Oct '10

Hi, Is there a way of checking if a stand-alone function exists? Thanks

4 4