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C++ Parsing - oops
by Foster, Gareth 03 Oct '04

03 Oct '04

Hello John, Joel, I didn't mean to knock your work with that last email John, it might have come across badly, it was meant more as a compliment to spirit and a reference to the fact that it 'appears' to fit the bill for what I want to do better, not to bash regex, I like regex too. For the record it needn't be 'perfect' indexing of the C++ code, I don't mind if I get two hits for the same classname for example. I used regex for a tool to index the C++ and C files themselves, so I could … [View More]quickly search for file names using regular expressions, it works great! So thank you both, no offence caused I hope. So, will spirit be the best way then? Glad to hear its already a part of boost btw, congratulations mate. Cheers! Gaz -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of John Maddock Sent: 30 September 2004 11:33 To: Subject: Re: [Boost-users] Boost:regex and C++ Parsing - Clarification > Thank you Caleb and Hartmut for your replies. You both seem to think regex > is a bad way to go, I will explain better what I want to write just to be > clear. > > I want to write a tool (cli probably) where I can say, here you go, here > is > a large folder full of code, go and parse it. I will store the results in > XML format somewhere, then, I can do say, "<myapp> class someclass" and > the > program will go and find where that class is declared/defined using its > database, saving me headache. > > So I thought I could use one of the C++ expat wrappers, and boost regex > looked powerful enough to do the parsing if only I were handy enough with > regular expression syntax. > > Anyway, I don't know if that better explanation will make any difference > to > you recommendations, I look forward to reading you opinions. > > Oh, and the example I looked at is here Hartmut: > http://boost.org/libs/regex/example/snippets/regex_search_example.cpp - > that > is what got me thinking I might actually be able to take on this > challenge. It depends what you want to do: if you want to use a "real" C++ parser then you will also have to preprocess the code (including the includes) and then parse the code. In theory this gives you a "perfect" result, but only if you know what include paths to use, and what predefined macros should be set (think about conditional code blocks). Regexes on the other hand, don't require you to preprocess the code, but can get confused by macros and the like. So you have to choose the way that best meets your expectations, and live with the defects either which way ;-) To solve your problem BTW, why not scan through the file for line starts (keeping count obviously!), and at each line start see if it's also the start of the regex you are interested in (one that matches a class definition for example), if you do this don't forget to either: prefix your expression with \A or Pass the match_continuous flag to regex_search, Either will anchor the search at the start of the line you are checking, and prevent the whole text being searched. John. _______________________________________________ Boost-users mailing list Boost-users(a)lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users [View Less]

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Re: Boost:regex and C++ Parsing - Spirit!
by Foster, Gareth 03 Oct '04

03 Oct '04

Wow, I just read through the 1st few pages of the spirit docs, and I can safely say, that is as close to naked women as C++ code will ever be, its such a sexy idea. One library, and you can parse any sort of config file, code or anything! Amazing. Well, any lingering desire to use regex for my pet project has now left the building, I can't wait to have a play with spirit. When will it be a part of boost? Is it worth installing it seperately (I'd hate to do that and have a new boost appear the … [View More]

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boost::multi_array class member
by Sergio Ferrari 02 Oct '04

02 Oct '04

Hi to all. Sorry for my English. I'm trying to use a boost::multi_array as a private member of a class. How I can specifying the number of elements for every dimensions into the constructor? #include <iostream> #include "boost/multi_array.hpp" using namespace std; typedef boost::multi_array<int, 2> table; class X { public: X(); ~X(){}; // ... void do_something(); private: table tab; boost::array<table::index, 2> dims; }; X::X() { dims … [View More]

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How to inherit from boost::multi_array
by Thomas Mensch 02 Oct '04

02 Oct '04

Dear List, I am using boost 1.31.0 on Linux (with gcc 3.3.2) I would like to create a 2D array class, which inherits from boost::multi_array<double, 2> class. However I have problems with the copy constructor of my class Array. Below is the code, which I am trying to run. #include <boost/multi_array.hpp> class Array : public boost::multi_array<double,2> { public: Array (void) : boost::multi_array<double, 2> () {} Array (const int nrow, const int ncol) :… [View More]

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[serialization1.32/vc7.1]: What's wrong with this class??
by Francis ANDRE 02 Oct '04

02 Oct '04

Hi I got a access violation on 0x00000000 with the class DDD but I cannot figure out what's wrong When the symbol NO_EXCEPTION is defined, the member acccode is set to an instance of ACCCODE and the serialization is working fine. But when this symbol is undefined, one gets the exception. I am suspecting the input serialization to bypass the loading of the member FIELD* field (which is following the "acccode" member) which leads to an exception when the next member DISP* disp is loaded but I … [View More]have no way to check it out any idea?? Francis Source code below and also joined in annex ---------------------------------------------------------------------- #include <iostream> #include <fstream> #include <boost/archive/text_iarchive.hpp> #include <boost/archive/text_oarchive.hpp> using namespace std; class FIELD : public string { private: friend class boost::serialization::access; friend std::ostream & operator<<(std::ostream &os, const FIELD&); template<class Archive> void serialize(Archive &ar, const unsigned int version) { ar & boost::serialization::base_object<string>(*this); ar & member; } private: string member; FIELD(){} public: FIELD(const string& name): string(name){} }; class DDD { private: friend class boost::serialization::access; friend std::ostream & operator<<(std::ostream &os, const DDD& dd); template<class Archive> void serialize(Archive &ar, const unsigned int version) { ar & acccode; ar & field; ar & disp; } public: DDD(): acccode(0), disp(0), field(0) {} class ACCCODE { private: friend class boost::serialization::access; friend std::ostream & operator<<( std::ostream &os, const ACCCODE& ); template<class Archive> void serialize(Archive &ar, const unsigned int version) { ar & acccode; } public: string acccode; ACCCODE(){} ACCCODE(const string& s) : acccode(s) {} }; class DISP { private: friend class boost::serialization::access; friend std::ostream & operator<<( std::ostream &os, const DISP& ); template<class Archive> void serialize(Archive &ar, const unsigned int version) { ar & disp; } public: string disp; DISP(){} DISP(const string& s) : disp(s) {} }; public: ACCCODE* acccode; FIELD* field; DISP* disp; }; int main(int argc, char* argv[]) { DDD ddd; #ifdef NO_EXCEPTION ddd.acccode = new DDD::ACCCODE("a"); #endif ddd.field = new FIELD("BAR"); ddd.disp = new DDD::DISP(); const char* file = "TEST.txt"; { std::ofstream os(file); boost::archive::text_oarchive oa(os); oa << ddd; } { std::ifstream is(file); boost::archive::text_iarchive ia(is); ia >> ddd; } } ---------------------------------------------------------------------------- -- A good friend will come bail you out of jail.......... but, a true friend....will be sitting next to you saying: "...that was fun." begin 666 test_serialization.cpp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a);65M8F5R.PT*"0E]#0H)<')I=F%T93H-"@D)<W1R M:6YG(&UE;6)E<CL-"@D)1DE%3$0H*7M]#0H)<'5B;&EC.@T*"0E&245,1"AC M;VYS="!S=')I;F<F(&YA;64I.B!S=')I;F<H;F%M92E[?0T*?3L-"@T*#0IC M;&%S<R!$1$0@('L-"@EP<FEV871E.@T*"0EF<FEE;F0@8VQA<W,@8F]O<W0Z M.G-E<FEA;&EZ871I;VXZ.F%C8V5S<SL-"@D)9G)I96YD('-T9#HZ;W-T<F5A M;2 F(&]P97)A=&]R/#PH<W1D.CIO<W1R96%M("9O<RP@8V]N<W0@1$1$)B!D M9"D[#0H)"71E;7!L871E/&-L87-S($%R8VAI=F4^#0H)"79O:60@<V5R:6%L M:7IE*$%R8VAI=F4@)F%R+"!C;VYS="!U;G-I9VYE9"!I;G0@=F5R<VEO;BD@ M>PT*"0D)87((a))B!A8V-C;V1E.PT*"0D)87(@)B!F:65L9#L-"@D)"6%R("8@ M9&ES<#L-"@D)?0T*"7!U8FQI8SH-"@D)1$1$*"DZ#0H)"0EA8V-C;V1E*# I M+ T*"0D)9&ES<"@P*2P-"@D)"69I96QD*# I#0H)"0E[?0T*"0EC;&%S<R!! 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G:6%R8VAI=F4@:6$H:7,I.PT*"0EI82 ^/B!D9&0[#0H)?0T*?0T* ` end [View Less]

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Boost 1.30 with g++ 3.4
by Ben Hutchings 02 Oct '04

02 Oct '04

I have an existing body of code using some parts of Boost 1.30 (Bind, Function, Regex, Thread, and some utilities) and compiled using VC++ 7.1 on Windows. I now need to build with g++ 3.3 or 3.4 on Linux as well, and for various reasons I would prefer to use 3.4. Boost 1.30 predates g++ 3.4 by some way and I know that it won't all work without changes. However, neither will 1.31, and 1.32 has still not been released. I would rather not upgrade to either of these in case they break the … [View More]

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Are BOOST_BUILD_PATH && BOOST_ROOT necessary?
by Steven T. Hatton 01 Oct '04

01 Oct '04

>From reading the documentation on boost.org, I have gotten the impression I don't need to set $BOOST_BUILD_PATH and $BOOST_ROOT. I'm more than a little confused about how I should use the boost libraries. Part of this comes from the fact that it is not clear to me exactly where the demarkation is between using the build system to build boost, and using it to build my own programs. Some of my confusion comes from the appearant change in configuration requirements described in the … [View More]documentation. It is suggested I don't need the environment variable used with earlier releases. One of these variables is $BOOST_ROOT, which the documentation used as an example of how to build boost. That example was exactly what I successfully (I believe) build the libraries with. I'm using SuSE Linux 9.1 on a P4 box. Some basic questions are these: When I downloaded and built boost, I first fetched the source for bjam. This is the name of the file I downloaded: boost-jam-3.1.10.tgz It compiled quite nicely, and I copied the resulting bjam jam mkjambase and yyacc to a location in my path. Are there anything other things such as configuration files I need to reside with the binary executables? Are there necessary configuration file that I need to have visible to these programs, even if they are not colocated? I then build boost with the command: bjam --prefix=$BOOST_ROOT "-sTOOLS=gcc" install after setting my BOOST_ROOT the way I wanted it. That resulted in two directories being placed in $BOOST_ROOT/ one is called $BOOST_ROOT/include/ the other is called $BOOST_ROOT/lib/. Under $BOOST_ROOT/include/ I have <path>/boost-1_31/boost/ which contains dozens of header files. I added $BOOST_ROOT/include/boost-1_31 to my $INCLUDE_PATH, and $BOOST_ROOT/lib to my $LIBRARY_PATH and $LD_LIBRARY_PATH variables. Is this the correct way to configure my system to use boost? Is there anything else I need to do in order to compile my programs against the boost headers and libraries? Will the boost libraries work as well as other, comperable libraries using autotools rather than bjam? Are there any special accommodations I need to make in order to use boost with the gnu build tools? Do I need to do anything special to use boost with bjam that does not involve placing files in my current project directories? For example, do I need to provide a global configuration file of some kind? Is it a preferred option, even if not strictly required? There is much remaining in the source directory where I compiled boost. Is that something I need to also put in an accessible place on my system? If so, what so I need to put where, and how to I modify my environment variable to facilitate its use? -- Regards, Steven [View Less]

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BOOST_CHECK_CLOSE apparent misbehavior
by Ross Boylan 01 Oct '04

01 Oct '04

I get the following error Specification_test.cc(22): error in "specsimple": difference between spec(i, j){0.206788} and results[k]{0.206788} exceeds 1e-05% The numbers agree to all printed digits. I get a maximum relative error (assuming the printed values are rounded from extremes)*(see footnote) of .000001/.206787 = 4.8e-6 < 1e-5. Even doubling this is under the tolerance. As I read the documentation, this should pass. 1e-6 tolerance produces a lot more discrepancies; 1e-4 says they … [View More]

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RE: [Boost-users] Re: Boost:regex and C++ Parsing - Spirit!
by Foster, Gareth 01 Oct '04

01 Oct '04

Sheesh, I've learned some new words there. I mean, dictionary.com is as close to naked ... Only joking. I thought it was the perfect way to describe how slick the library was :) that's my effusing done for the day anyway. -----Original Message----- From: boost-users-bounces(a)lists.boost.org [mailto:boost-users-bounces@lists.boost.org] On Behalf Of Justin Findlay Sent: 30 September 2004 17:22 To: boost-users(a)lists.boost.org Subject: Re: [Boost-users] Re: Boost:regex and C++ Parsing - … [View More]

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Forgot to add
by Foster, Gareth 01 Oct '04

01 Oct '04

I also was going to say Joel, you ought to moan about the description of spirit in the docs, I can see it is there in the list of libraries now, and whilst it probably does describe what the library does, it doesn't do it in a way that is very identifiable for those who don't know about the subject, I just plain missed it, despite the fact that I was looking to parse C++. spirit <file:///C:/boost/boost_1_31_0/libs/spirit/index.html> - LL parser framework represents parsers directly as … [View More]

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