[Proposal] simple expression language in commons-math

[Himanshu <g....@gmail.com>]

Hi,

Recently I needed to embed support for simple math expressions in my
project. Example grammar is...

expr : ('-'|'!') expr
     | expr '^' expr
     | expr ('*'|'/'|'%') expr
     | expr ('+'|'-') expr
     | expr ('<'|'<='|'>'|'>='|'=='|'!=') expr
     | '(' expr  ')'
     | ID
     | DOUBLE
     | LONG
     ;

with basic math functions like sqrt supported in the expressions. I thought
such expression language would be available in commons-math, but it is not
(please correct me if I am wrong).

I am working on it already for my project and would love to contribute to
commons-math. Just wondering, How likely is commons community ready to
accept same?

-- Himanshu

Re: [Proposal] simple expression language in commons-math

[Gary Gregory <ga...@gmail.com>]

This seems out of scope to me; especially since Java has built-in support
for JavaScript and any and all languages that support the Java scripting
API.

Gary

On Mon, Dec 14, 2015 at 8:48 PM, Himanshu <g....@gmail.com> wrote:

> Hi,
>
> Recently I needed to embed support for simple math expressions in my
> project. Example grammar is...
>
> expr : ('-'|'!') expr
>      | expr '^' expr
>      | expr ('*'|'/'|'%') expr
>      | expr ('+'|'-') expr
>      | expr ('<'|'<='|'>'|'>='|'=='|'!=') expr
>      | '(' expr  ')'
>      | ID
>      | DOUBLE
>      | LONG
>      ;
>
> with basic math functions like sqrt supported in the expressions. I thought
> such expression language would be available in commons-math, but it is not
> (please correct me if I am wrong).
>
> I am working on it already for my project and would love to contribute to
> commons-math. Just wondering, How likely is commons community ready to
> accept same?
>
> -- Himanshu
>



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