Class: Puppet::Parser::AST::ArithmeticOperator

Inherits:
Branch show all
Defined in:
lib/vendor/puppet/parser/ast/arithmetic_operator.rb

Constant Summary

Constants inherited from Puppet::Parser::AST

AST

Constants included from Util::Docs

Util::Docs::HEADER_LEVELS

Instance Attribute Summary collapse

Attributes inherited from Branch

#children, #pin

Attributes inherited from Puppet::Parser::AST

#file, #line, #parent, #scope

Attributes included from Util::Docs

#doc, #nodoc

Instance Method Summary collapse

Methods inherited from Puppet::Parser::AST

associates_doc, #evaluate_match, #inspect, #parsefail, #parsewrap, #safeevaluate, settor?, #use_docs

Methods included from Util::Docs

#desc, #dochook, #doctable, #markdown_definitionlist, #markdown_header, #nodoc?, #pad, scrub

Methods included from Util::MethodHelper

#requiredopts, #set_options, #symbolize_options

Methods included from Util::Errors

#adderrorcontext, #devfail, #error_context, #exceptwrap, #fail

Constructor Details

#initialize(hash) ⇒ ArithmeticOperator

Returns a new instance of ArithmeticOperator.

Raises:

  • (ArgumentError) 


33
34
35
36
37
 
# File 'lib/vendor/puppet/parser/ast/arithmetic_operator.rb', line 33

def initialize(hash)
  super

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

Instance Attribute Details

#lval ⇒ Object

Returns the value of attribute lval.



7
8
9
 
# File 'lib/vendor/puppet/parser/ast/arithmetic_operator.rb', line 7

def lval
  @lval
end

#operator ⇒ Object

Returns the value of attribute operator.



7
8
9
 
# File 'lib/vendor/puppet/parser/ast/arithmetic_operator.rb', line 7

def operator
  @operator
end

#rval ⇒ Object

Returns the value of attribute rval.



7
8
9
 
# File 'lib/vendor/puppet/parser/ast/arithmetic_operator.rb', line 7

def rval
  @rval
end

Instance Method Details

#each ⇒ Object

Iterate across all of our children.



10
11
12
 
# File 'lib/vendor/puppet/parser/ast/arithmetic_operator.rb', line 10

def each
  [@lval,@rval,@operator].each { |child| yield child }
end

#evaluate(scope) ⇒ Object

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



16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
# File 'lib/vendor/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