Class: Heuristics::Builder

Inherits:
Object
  • Object
show all
Defined in:
lib/heuristics/builder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Builder

Returns a new instance of Builder.



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# File 'lib/heuristics/builder.rb', line 7

def initialize
	@assumptions = {}
end

Instance Attribute Details

#assumptions ⇒ Object (readonly)

Returns the value of attribute assumptions.



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# File 'lib/heuristics/builder.rb', line 5

def assumptions
  @assumptions
end

#default ⇒ Object (readonly)

Returns the value of attribute default.



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# File 'lib/heuristics/builder.rb', line 5

def default
  @default
end

Instance Method Details

#assume(type, &block) ⇒ Object 



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# File 'lib/heuristics/builder.rb', line 11

def assume(type, &block)
	raise "An assumption with the name '#{type}' already exists" unless @assumptions[type].nil?
	@assumptions[type] = Proc.new(&block)
end

#assume_default(type) ⇒ Object 



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# File 'lib/heuristics/builder.rb', line 24

def assume_default(type)
	@default = type
end

#check(value) ⇒ Object 



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# File 'lib/heuristics/builder.rb', line 16

def check(value)
	context = OpenStruct.new(value: value)
	
	@assumptions.map do |type, prok|
		(context.instance_eval(&prok) ? type : default) rescue default
	end.reject(&:nil?).first
end