Module: Porolog

Defined in:
lib/porolog.rb,
lib/porolog/rule.rb,
lib/porolog/error.rb,
lib/porolog/scope.rb,
lib/porolog/arguments.rb,
lib/porolog/predicate.rb

Overview

lib/porolog/predicate.rb - Plain Old Ruby Objects Prolog Engine – Predicate

Luis Esteban   2 May 2018
  created

Defined Under Namespace

Classes: Arguments, PorologError, Predicate, Rule, Scope

Constant Summary collapse

VERSION =

The most recent version of the Porolog gem.

'0.0.5'
VERSION_DATE =

The most recent date of when the VERSION changed.

'2019-04-22'

Instance Method Summary collapse

Instance Method Details

#predicate(*names) ⇒ Porolog::Predicate+

A convenience method to create a Predicate, along with a method that returns an Arguments based on the arguments provided to the method.

Parameters:

  • names (Array<#to_sym>) —

    names of the Predicates to create.

Returns:



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# File 'lib/porolog.rb', line 21

def predicate(*names)
  names = [names].flatten
  
  predicates = names.map{|name|
    method     = name.to_sym
    predicate  = Predicate.new(name)
    Object.class_eval{
      define_method(method){|*args|
        predicate.(*args)
      }
    }
    predicate
  }
  
  predicates.size > 1 && predicates || predicates.first
end