Class: ReDuxml::Evaluator

Inherits:
Object
  • Object
show all
Includes:
Math, ReDuxml, Symbolic
Defined in:
lib/re_dux/evaluate.rb

Constant Summary collapse

COMPARATORS = 
%w(

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Symbolic

#%, #-@, #not

Methods included from AST

#new_ast

Methods included from ReDuxml

#resolve

Constructor Details

#initialize(logic = nil) ⇒ Evaluator

Returns a new instance of Evaluator.



16
17
18
19
 
# File 'lib/re_dux/evaluate.rb', line 16

def initialize(logic=nil)
  @parser = Parser.new(logic || '../../xml/logic.xml')
  @param_hash = {}
end

Instance Attribute Details

#param_hash ⇒ Object (readonly)

Returns the value of attribute param_hash.



14
15
16
 
# File 'lib/re_dux/evaluate.rb', line 14

def param_hash
  @param_hash
end

#parser ⇒ Object (readonly)

Returns the value of attribute parser.



14
15
16
 
# File 'lib/re_dux/evaluate.rb', line 14

def parser
  @parser
end

Instance Method Details

#evaluate(_expr, _param_hash = {}) ⇒ Object 



25
26
27
28
29
30
31
32
33
34
 
# File 'lib/re_dux/evaluate.rb', line 25

def evaluate(_expr, _param_hash={})
  @param_hash = _param_hash
  expr = resolve_params _expr
  result = reduce parser.parse expr
  case
    when result.respond_to?(:imaginary), result.class == TrueClass, result.class == FalseClass then result
    when result.respond_to?(:print) then result.print(parser.logic)
    else result.to_s
  end
end

#to_s ⇒ Object 



21
22
23
 
# File 'lib/re_dux/evaluate.rb', line 21

def to_s
  "#<Evaluator: param_hash: '#{param_hash.to_s}' parser_logic: '#{parser}'>"
end