class Puppet::Parser::AST::ArithmeticOperator

Attributes

lval[RW]

operator[RW]

rval[RW]

Public Class Methods

new(hash) click to toggle source

Calls superclass method

# File lib/puppet/parser/ast/arithmetic_operator.rb, line 33
def initialize(hash)
  super

  raise ArgumentError, "Invalid arithmetic operator #{@operator}" unless %w{+ - * / << >>}.include?(@operator)
end

Public Instance Methods

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

Iterate across all of our children.

# File lib/puppet/parser/ast/arithmetic_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/arithmetic_operator.rb, line 16
def evaluate(scope)
  # evaluate the operands, should return a boolean value
  lval = @lval.safeevaluate(scope)
  lval = Puppet::Parser::Scope.number?(lval)
  if lval == nil
    raise ArgumentError, "left operand of #{@operator} is not a number"
  end
  rval = @rval.safeevaluate(scope)
  rval = Puppet::Parser::Scope.number?(rval)
  if rval == nil
    raise ArgumentError, "right operand of #{@operator} is not a number"
  end

  # compute result
  lval.send(@operator, rval)
end