class Puppet::Parser::AST::BooleanOperator

Attributes

lval[RW]
operator[RW]
rval[RW]

Public Class Methods

new(hash) click to toggle source
Calls superclass method 
# File lib/puppet/parser/ast/boolean_operator.rb, line 40
def initialize(hash)
  super

  raise ArgumentError, "Invalid boolean operator #{@operator}" unless %w{and or}.include?(@operator)
end

Public Instance Methods

each() { |child| ... } click to toggle source

Iterate across all of our children.

# File lib/puppet/parser/ast/boolean_operator.rb, line 10
def each
  [@lval,@rval,@operator].each { |child| yield child }
end
evaluate(scope) click to toggle source

Returns a boolean which is the result of the boolean operation of lval and rval operands

# File lib/puppet/parser/ast/boolean_operator.rb, line 16
def evaluate(scope)
  # evaluate the first operand, should return a boolean value
  lval = @lval.safeevaluate(scope)

  # return result
  # lazy evaluate right operand
  case @operator
  when "and"
    if Puppet::Parser::Scope.true?(lval)
      rval = @rval.safeevaluate(scope)
      Puppet::Parser::Scope.true?(rval)
    else # false and false == false
      false
    end
  when "or"
    if Puppet::Parser::Scope.true?(lval)
      true
    else
      rval = @rval.safeevaluate(scope)
      Puppet::Parser::Scope.true?(rval)
    end
  end
end