Class: Factbase::Never

Inherits:

TermBase

• Object
• TermBase
• Factbase::Never

Defined in:

lib/factbase/terms/never.rb

Overview

The term ‘never’ that never evaluates to true.

Instance Method Summary

• #evaluate(_fact, _maps, _fb) ⇒ Boolean

  Evaluate term on a fact.

• #initialize(operands = []) ⇒ Never constructor

  Constructor.

Methods included from TermShared

#to_s

Constructor Details

#initialize(operands = []) ⇒ Never

Constructor.

Parameters:

• operands (Array) (defaults to: []) —

  Operands

# File 'lib/factbase/terms/never.rb', line 11

def initialize(operands = [])
  super()
  @operands = operands
  @op = :never
end

Instance Method Details

#evaluate(_fact, _maps, _fb) ⇒ Boolean

Evaluate term on a fact.

Parameters:

• _fact (Factbase::Fact) —

  The fact

• _maps (Array<Factbase::Fact>) —

  All maps available

• _fb (Factbase) —

  Factbase to use for sub-queries

Returns:

• (Boolean) —

  Always returns false

# File 'lib/factbase/terms/never.rb', line 22

def evaluate(_fact, _maps, _fb)
  assert_args(0)
  false
end