AskA

Ari Lerner
CitrusByte
http://blog.citrusbyte.com

DESCRIPTION:

* Super basic rule-based parser to match given rules

Basics

In your class, add your rule definitions

class Car
  include Aska
  attr_accessor :x, :y
  rules :names, <<-EOR
      x > 0
      x > y
      y > 0
    EOR
end

Then you can see if the rules are matched with the call

@car.rules_valid?(:names)

Currently, the methods that are supported are: < > == => =< to check the rules against

Aska will try to call the method name given if the method exists on the object, or it will revert to a self-created attribute (named: METHODNAME_aska, if you are curious). This way it does not overwrite any methods on accident and you have access to the data.

This rewrite does not use eval on each check.

If they do all match, then the rules_valid? will return true, otherwise it will return false

You can check if a set of rules exist with: are_rules?(:rules)
You can check look up the rules manually with: look_up_rules(:rules)

INSTALL:

gem install aska

ROADMAP

  • v0.0.4 - Namespace rules

  • v0.0.3 - Remove eval from the evaluation of rules

  • v0.0.2 - Add buckets for rules

  • v0.0.1 - First release

LICENSE:

(The MIT License)

Copyright © 2008 Ari Lerner. CitrusByte

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the ‘Software’), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED ‘AS IS’, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.