Class: Factbase::Type

Inherits:
TermBase show all
Defined in:
lib/factbase/terms/type.rb

Overview

Represents a type term in the Factbase. This class evaluates the type of the given operand based on the provided fact, maps, and factbase.

Instance Method Summary collapse

Methods included from TermShared

#to_s

Constructor Details

#initialize(operands) ⇒ Type

Constructor.



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# File 'lib/factbase/terms/type.rb', line 14

def initialize(operands)
  super()
  @operands = operands
end

Instance Method Details

#evaluate(fact, _maps, _fb) ⇒ String

Evaluate term on a fact.



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# File 'lib/factbase/terms/type.rb', line 24

def evaluate(fact, _maps, _fb)
  assert_args(1)
  v = _by_symbol(0, fact)
  return 'nil' if v.nil?
  v = v[0] if v.respond_to?(:each) && v.size == 1
  v.class.to_s
end