February 2014 - Boost - lists.preview.boost.org

Udp Socket
by •°o.O sαмι O.o°• 04 Feb '14

04 Feb '14

Asalam-o-Aliakum and Hi all, I am having a problem with boost udp socket. My program terminates after throwing exception "host unreachable". My questions: 1). why udp socket cares for host it should just send data out of its own port and its job is done? 2). And how it knows that host is not available if udp is connection less protocol? 3). And another simple question how to avoid program termination on this exception? Best Regards; Sami Ul Haq

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Building with clang for Windows/MingW
by Edward Diener 03 Feb '14

03 Feb '14

When trying to test clang under Windows which is built with MingW, Boost Build runs with the options: -c -x c++ -O0 -g -fno-inline -Wall -g -mthreads However clang does not recognize -mthreads and flags it as an error. Is there anything I can do to remove this option from the clang++.exe command line when invoking Boost Build ?

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named_condition_any not working.
by Marius Adrian DOBRESCU 02 Feb '14

02 Feb '14

Hello! I tried to use into my code an interprocess mechanism like producer/multiple consumers with named_sharable_mutexes. I found out that named_condition_any is not working with any kind of scoped locks. Neither with sharable_mutex or simple named_mutex. It takes the lock successful but cannot unblock another process when notify is called. I used linux, gcc 4.8, just basic build, linking with pthreads. Is this a known issue to you because I couldn't find any info related on the Internet? Maybe I can take a look next week what is in there... Adrian

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http://lists.boost.org/Archives/boost/2014/01/211169.php
by Gilbert Polo 02 Feb '14

02 Feb '14

Thank you for the simple explanation. Somehow I lost sight of the forest for the trees or its a lot easier to see when the obvious is pointed out.

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[C++11] Is conditional code allowed?
by Fletcher, John P 02 Feb '14

02 Feb '14

I am working on bugs in boost phoenix. I have found some problems eg. #7624 which run fine with C++11 with either Clang 3.4 or gcc 4.8.2. I also have a patch which has been suggested for bug #8704 which uses C++11. Is there a way to incorporate C++11 only code into tests or the actual headers. If so, is there an example of how to do it in Boost? Thank you John Fletcher

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RTG Graph Generator
by Khaled Ammar 02 Feb '14

02 Feb '14

Hi everyone, I noticed that boost has RMAT and Erdös-Renyi graph generator but it does not include a (more) recent and realistic graph generator like RTG. RTG is based on this paper from CMU: http://www.cs.cmu.edu/~lakoglu/pubs/RTG_GraphGenerator.pdf. -- Thanks, -Khaled

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[modular] and status/explicit-failures-markup.xml
by Joachim Faulhaber 01 Feb '14

01 Feb '14

Dear modularists, I've just tried to make changes to modular-boost/status/explicit-failures-markup.xml. Since I have only write permission to my own library libs/icl in modular boost, trying to push my changes failed. What is the right way to change the regression test markups in modular-boost? Best, Joachim -- Interval Container Library [Boost.Icl] http://www.joachim-faulhaber.de

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[offtopic] user-defined raw string literals
by Adam Wulkiewicz 01 Feb '14

01 Feb '14

Hi, I have some idea related to the usage of UDLs in Boost.Geometry library but the way I'd like to handle it is AFAIK not supported. A little introduction first. There are many text-based languages of defining data. One of them is WKT (http://en.wikipedia.org/wiki/Well-known_text) which allows to define vector data e.g. a polygon like this: |POLYGON((30 10, 40 40, 20 40, 10 20, 30 10))| So my thought was: why not use C++11 UDLs for this purpose? There are operators in the WKT language so I should probably use string literal, put WKT in it and be happy with it. The use case could look like this: |auto ||polygon = "POLYGON((30 10,40 40,20 40,10 20,30 10))|"_wkt; Ok so now the tricky part. It should be parsed in compile-time, the type of the geometry retrieved from the string literal and proper type returned (bg::polygon<> in this case). Unfortunately string literals can't be handled as raw literals, e.g. using the variadic-template version of operator"": template <char...> void operator "" () Why? Is there a reason for this? If we had the ability to use the compile-time version with string literals it would be possible to implement various compile-time parsers, not only for the mentioned WKT. So what do you think about it? Regards, Adam

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[docs][website] Can the docs on the website be xhtml + svg?
by John Maddock 01 Feb '14

01 Feb '14

I've been investigating getting better equations and graphs into the Math lib docs and one prerequisite seems to be serving up pages as XHTML rather than HTML: without that SVG's simply do not display correctly (or at all) in IE. The docbook xhtml generation seems to be working OK, but would the pages get served correctly on the current website? Thanks, John.

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[conversion] Need a help with MSVC failures
by Antony Polukhin 01 Feb '14

01 Feb '14

Hi, Some of the tests for Boost.LexicalCast fail on any MSVC compiler. Unfortunately currently I have no access to Windows. Could someone please investigate the failures and tell me were to search the bug? -- Best regards, Antony Polukhin

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