|
From: | Joey |
Subject: | Re: [bug-libmatheval] "reverse alphanumerical" variables optional feature possible? |
Date: | Thu, 09 Jan 2014 06:44:20 +0100 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.2.0 |
On 01/09/2014 12:25 AM, Marin Barateh
wrote:
Hi Marin,Hi, Joey,I'm looking for a way to regard the reverse of alphanumericals as variables, e.g 3A. I have a possible solution, wherein i precede string literals starting with a digit with an underscore character, but is there a more easy option here? If not, this may be an optional feature?I'm afraid there is nothing easier, even so, I'd put at least a letter before the underscore (variables beginning with _ use to be reserved). I'll consider to let hexadecimals as variable names, though it's very irregular: what if at some point in the future libmatheval evolved to use hex values? Thanks for your feedback, Marin That's a good point, but unfortunately, although not common, there are header files that reserve letters followed by an underscores as well. void evaluator_get_variables (void *evaluator, char ***names, int *count) can not process values like 00FF00 or 0x00FF00. In the program I'm currently working on, https://github.com/ozette/roloc, I want to be able to do this for example: RED+00FF00Even though 00FF00 is a value, If it were to become a variable in my case i.e _00FF00 it'd be possible to be reference it with name[n]. A find_color function in the program will then restore eventual values starting with a _ character. I agree with hexadecimal values as var names being irregular, so maybe it's a bad idea after all.. Actually the way the program is written now, the only functions used are evaluator_create and evaluator_get_variables. I added libmatheval for eventual future functionality, and because it's an amazing lib. Maybe I am better off writing my own "get_variables" function because i regard to 00FF00 as a string literal instead of a actual number. Anyhow, if libmatheval were to evolve to support hex someday it'd be fantastic. Joey |
[Prev in Thread] | Current Thread | [Next in Thread] |