Ty, I haven't had the time to study your code in depth, but I've got a feeling that a Python implementation would be way more readable and simple. Now how big the bytecode would be and how well it would perform would have to be seen.
Hey! How about a second generation of fruit basket programs -- fruit calculators?
We should also seriously look at fruit basket improved programs based on frameworks, with persistent storage. Anyone for ideas of what to put into such a specification?
Keep well wonderful people! Kerneels On 4/8/2011 2:17 AM, Littlefield, Tyler wrote:
I have no clue what your message said since you contradicted yourself three times. "will take you longer less nashing of the teeth." boost::spirit isn't all that dificult, and it was rather quick. "less of a memory hog:" my calculator takes 916 bytes RSS memory. maybe 3k at most, the binary size is under 20 kb when optomised.On 4/7/2011 6:11 PM, Ken Perry wrote:Sure there is a better way. You write it to fit the problem. Now better is a subjective term because while the code will look cleaner be better less memory hog. I t will take you long.er and much nashing of teeth. So thequestion is what you mean by better. Ken -----Original Message----- From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Sina Bahram Sent: Thursday, April 07, 2011 3:20 PM To: programmingblind@xxxxxxxxxxxxx Subject: RE: boost::spirit and boost in general for c++ people. I don't think a better way exists in C++. That's kind of my point. That's why I think it's so sad. Ken, thoughts? Take care, Sina -----Original Message----- From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Homme, James Sent: Thursday, April 07, 2011 12:42 PM To: programmingblind@xxxxxxxxxxxxx Subject: RE: boost::spirit and boost in general for c++ people. Hi Sina,What I meant when I said I could read the code was simply that I was gladthat I was understanding a lot of it. It would really beinstructive to me if you would help me understand a better way to write it,because I would love to learn OO correctly the firsttime. And I would be greatful if you would be able to do that. I know youare very busy. Thanks. Jim Jim Homme, Usability Services, Phone: 412-544-1810. Skype: jim.homme Highmark recipients, Read my accessibility blog. Discuss accessibility here. Accessibility Wiki: Breaking news and accessibility advice -----Original Message----- From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Sina Bahram Sent: Thursday, April 07, 2011 11:22 AM To: programmingblind@xxxxxxxxxxxxx Subject: RE: boost::spirit and boost in general for c++ people. Good god, this is ugly. Seriously, you guys find that code easy to read? Take care, Sina -----Original Message----- From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Ken Perry Sent: Thursday, April 07, 2011 10:07 AM To: programmingblind@xxxxxxxxxxxxx Subject: RE: boost::spirit and boost in general for c++ people.Snicker welcome to the future... Hmm how many times have I told you to useit and you told me no??? Ken -----Original Message----- From: programmingblind-bounce@xxxxxxxxxxxxx [mailto:programmingblind-bounce@xxxxxxxxxxxxx] On Behalf Of Littlefield, Tyler Sent: Thursday, April 07, 2011 9:09 AM To: programmingblind@xxxxxxxxxxxxx Subject: boost::spirit and boost in general for c++ people. hello all: Recently I got into using boost a bit and started finding uses for it all over the place. I would like to encourage those who haven't yet and use c++ to check it out; it is quite powerful and can eas some of your work and provide really cool features along the way. For example: boost::function lets you take callbacks in multiple forms; boost::bind will let you bind a functor to it's arguments and pass that as your callback, which means you can bind to a static member function, a member function (and pass the object with boost::ref), a global function and you can also use boost::lambda. There are many more utilities out there; I highly recommend checking out boost::asio, boost::fusion, boost::function and boost::bind. In the spirit of convincing you all, I wrote a small calculator program that does single operations (1+3, 3*5), etc and returns the result. My next step is to split up my parsing into different rulesets and then work on generating an AST so that I can handle larger more complex calculations. /* A simple calculator, supports multiplication, division, addition and subtraction. */ #include<boost/spirit/include/qi.hpp> #include<boost/spirit/include/phoenix_core.hpp> #include<boost/spirit/include/phoenix_operator.hpp> #include<boost/spirit/include/phoenix_operator.hpp> #include<iostream> #include<string> #include<boost/fusion/include/adapt_struct.hpp> #include<boost/fusion/container/vector.hpp> #include<boost/fusion/container/vector/convert.hpp> #include<boost/fusion/include/io.hpp> namespace qi = boost::spirit::qi; namespace ascii = boost::spirit::ascii; namespace phoenix = boost::phoenix; struct calculation { int a, b; char op; }; BOOST_FUSION_ADAPT_STRUCT(calculation, (int, a) (char, op) (int, b) ) template<typename iterator> class CParser:public qi::grammar<iterator, calculation(), qi::ascii::space_type> { qi::rule<iterator, calculation(), qi::ascii::space_type> crule; public: CParser():CParser::base_type(crule) { using qi::ascii::char_; using qi::int_; crule %= (int_>> (char_('+')|char_('-')|char_('*')|char_('/'))>> int_); } }; int main() { CParser<std::string::iterator> p; std::string str; calculation result; std::cout<< "Enter your calculation>"; getline(std::cin, str); bool r = phrase_parse(str.begin(), str.end(), p, qi::ascii::space, result); if (r) { std::cout<< "a: "<< result.a<< " b: "<< result.b<< " op:" << result.op<< std::endl; switch(result.op) { case '+':std::cout<< "Result: "<< (result.a + result.b)<< std::endl;break; case '-':std::cout<< "result: "<< (result.a - result.b)<< std::endl;break; case '*':std::cout<< "Result: "<< (result.a * result.b)<< std::endl;break; case '/': if (result.a == 0) { std::cout<< "Division by zero error."<< std::endl; break; }std::cout<< "result: "<< (result.a / result.b)<< std::endl;break; default: std::cout<< "Invalid operation."<< std::endl; } } else { std::cout<< "Invalid input."<< std::endl; } return 0; } -- Thanks, Ty __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind This e-mail and any attachments to it are confidential and are intended solely for use of the individual or entity to whom they are addressed. If you have received this e-mail in error, please notify the sender immediately and then delete it. If you are not the intended recipient, you must not keep, use, disclose, copy or distribute this e-mail without the author's prior permission. The views expressed in this e-mail message do not necessarily represent the views of Highmark Inc., its subsidiaries, or affiliates. __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind __________ View the list's information and change your settings at //www.freelists.org/list/programmingblind
-- Kerneels Roos Cell: +27 (0)82 309 1998 Skype: cornelis.roos __________View the list's information and change your settings at //www.freelists.org/list/programmingblind
