January 2009 - Boost-users - lists.preview.boost.org

boost::proto helpful for a compiler project?
by peter_foelsche＠agilent.com 27 Jan '09

27 Jan '09

How can boost proto help me in my compiler project? Is it another way to write a grammar and parse it? Peter Foelsche "The first point (using an init() function in preference to a constructor) is bogus. Using constructors and exception handling is a more general and systematic way of dealing with resource acquisition and initialization errors. This style is a relic of pre-exception C++." -- Stroustrup

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Re: [Boost-users] Looking for a book on graph algorithms
by Alan M. Carroll 27 Jan '09

27 Jan '09

I still reference the Melhorn book. Data Structures and Algorithms 2: Graph Algorithms and NP-Completeness Kurt Melhorn EATCS Monographs on Theoretical Computer Science

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Numeric_cast from int to float
by Hermann Rodrigues 27 Jan '09

27 Jan '09

Hi, I am using boost::numerical_cast to cast different numerical types in my code. Everything always seems to work as I expected except for a small thing: I always thought that the conversion from int to float could raise an exception when the int can not be properly represented as a float. However, this is not what I am gettingn in version 1.33.1. For example, in my opinion, casting -2147483647 to a float should be raising an exception but boost::numerical_cast always says that the conversion is valid and well-formed. Obviously, my boost version is a little outdated, but I can not upgrade at this time due to several constraints. My question is: is this behavior either a bug (even in newer versions of boost) or a feature? Thank you in advance. -- Hermann Rodrigues hermann(a)csr.ufmg.br Centro de Sensoriamento Remoto / UFMG http://www.csr.ufmg.br/dinamica

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Looking for a book on graph algorithms
by Roger House 27 Jan '09

27 Jan '09

I'm looking for a good book on graph algorithms, perhaps something a bit different than the usual introductory book. For example, I would like an algorithm for finding all paths from vertex v to vertex u, not necessarily the shortest one or the longest one. Also, algorithms for determining the girth, diameter, and other properties of graphs are of interest. Or perhaps I should be looking at journal papers? Any pointers will be appreciated. Roger House

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Re: [Boost-users] Looking for a book on graph algorithms
by Rodolfo Federico Gamarra 26 Jan '09

26 Jan '09

I give two other references: Network Flows: Theory, Algorithms, and Applications (Hardcover) by Ravindra K. Ahuja (Author), Thomas L. Magnanti (Author), James B. Orlin (Author) This book is quite big (~850 pages), many applications, problems and algorithmic variations. Graph Theory by Frank Harary (Author) This more focused on, so to say, the math side: properties and theorems about graphs, less than 300 pages. -- Rodolfo Federico Gamarra

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[boost-build]how to configure custom targets
by Sandeep Gupta 26 Jan '09

26 Jan '09

Hello, I am trying to roll out my own main target (essentially to create plots using gnuplots). The tutorial example/customization was helpful and modifications at appropriate places does the required job. However the output-file is generated on "bin/gcc-4.2/debug". How can I change this so that it outputs to plots/ subdirectory. My second concern is that bjam executes the rule even if the end target is up-to-date. How to fix this. Thanks, Sandeep

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[Bind] bind to member functions
by Rutger ter Borg 26 Jan '09

26 Jan '09

Hello, this works fine, struct A { template< typename X > void f( bool ) { bind(&A::f<X>, this, _1)( true ); } }; whereas template< typename Z > struct A { template< typename X > void f( bool ) { bind(&A<Z>::f<X>, this, _1)( true ); } }; gives me trouble in the at the line of bind form of "expected primary-expression before ‘>’ token". I've tried numerous typedefs, but that didn't do the trick. Many thanks in advance for help on this, Rutger

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[serialization] Creating temporary archive objects
by Robert Dailey 26 Jan '09

26 Jan '09

Hi, What would be a good technique to deserialize an object without using 2-phase initialization? In other words, I want to avoid first default constructing the object and *then* streaming it out of the archive object. I was thinking of a factory for this but a good code example would help a great deal since I'm not extremely familiar with Boost.Serialization. I was looking through the Boost.Serialization documentation but I was unable to find information on this. Help is greatly appreciated!

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[Smart Ptr] explicit checked_delete specialization ?
by Alexander 26 Jan '09

26 Jan '09

Is this OK to specialize boost::checked_delete to control deletion with scoped_ptr ? Or to specialize some boost::scoped_ptr members for the same purpose ?

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how to get available disk space value via boost?
by boost001 26 Jan '09

26 Jan '09

I want to get free disk space via boost. How can I do it? thanks -- View this message in context: http://www.nabble.com/how-to-get-available-disk-space-value-via-boost--tp21… Sent from the Boost - Users mailing list archive at Nabble.com.

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