Hartmut, I would like to generate well-formed units and create expressions of the followiong kinds: Examples of unit expressions: 1. 2m + 15m*32s/16s = 32m. 2. 3m*7s + 2m*10s/5m = 21m + 4s -> ERROR. Can't add meters to seconds. The second group looks more tricky. Examples of simplification: 1. (x-2)^2 + 4x^2 - 2^x + 1 = 5x^2 - 8x + 10 2. x^2 + 7x + 10 = (x + 2)(x + 5) 3. (a + b)(a - b) = a^2 - b^2 4. sin(x)^2 + cos(x)^2 = 1 5. 2sin(x)cos(x) = sin(2x) One tricky part is for example #5 where the code needs to 'know' trigonometry. best regards Daniel ________________________________ From: boost-bounces@lists.boost.org on behalf of Hartmut Kaiser Sent: Mon 08-06-2009 01:46 To: boost@lists.boost.org Subject: Re: [boost] [Units & Spirit] libraries
I am using the Units library for Dimensional Analysis. So far it is very useful. Up till now I am using it in a hard-coded/compile time way as in a test.cpp.
My inteterst is in using Units as part of a larger run-time system so I need some way of making my code more flexible. Lambda library is an option here but I would also like to create units and quanties from string input as well as being able to parse these strings to units and then store the units in a database.
Can I use Spirit (and Serialization) for these features? Maybe the functionality already exist, and I have not found it.
Sure Spirit is your friend for all parsing and output generation needs. What did you have in mind? Regards Hartmut _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost