Class: Puppet::Parser::AST::CollExpr

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

Instance Attribute Summary collapse

Attributes inherited from Branch

#children, #pin

Instance Method Summary collapse

Methods inherited from Branch

#each

Constructor Details

#initialize(hash = {}) ⇒ CollExpr

Returns a new instance of CollExpr.

Raises:

  • (ArgumentError) 


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# File 'lib/puppet/parser/ast/collexpr.rb', line 101

def initialize(hash = {})
  super
  if Puppet[:parser] == "future"
    @@compare_operator ||= Puppet::Pops::Evaluator::CompareOperator.new
  end
  raise ArgumentError, "Invalid operator #{@oper}" unless %w{== != and or}.include?(@oper)
end

Instance Attribute Details

#form ⇒ Object 



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# File 'lib/puppet/parser/ast/collexpr.rb', line 9

def form
  @form
end

#oper ⇒ Object 



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# File 'lib/puppet/parser/ast/collexpr.rb', line 9

def oper
  @oper
end

#parens ⇒ Object 



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# File 'lib/puppet/parser/ast/collexpr.rb', line 9

def parens
  @parens
end

#test1 ⇒ Object 



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# File 'lib/puppet/parser/ast/collexpr.rb', line 9

def test1
  @test1
end

#test2 ⇒ Object 



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# File 'lib/puppet/parser/ast/collexpr.rb', line 9

def test2
  @test2
end

#type ⇒ Object 



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# File 'lib/puppet/parser/ast/collexpr.rb', line 9

def type
  @type
end

Instance Method Details

#evaluate(scope) ⇒ Object 



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# File 'lib/puppet/parser/ast/collexpr.rb', line 11

def evaluate(scope)
  if Puppet[:parser] == 'future'
    evaluate4x(scope)
  else
    evaluate3x(scope)
  end
end

#evaluate3x(scope) ⇒ Object

We return an object that does a late-binding evaluation.



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# File 'lib/puppet/parser/ast/collexpr.rb', line 20

def evaluate3x(scope)
  # Make sure our contained expressions have all the info they need.
  [@test1, @test2].each do |t|
    if t.is_a?(self.class)
      t.form ||= self.form
      t.type ||= self.type
    end
  end

  # The code is only used for virtual lookups
  match1, code1 = @test1.safeevaluate scope
  match2, code2 = @test2.safeevaluate scope

  # First build up the virtual code.
  # If we're a conjunction operator, then we're calling code.  I did
  # some speed comparisons, and it's at least twice as fast doing these
  # case statements as doing an eval here.
  code = proc do |resource|
    case @oper
    when "and"; code1.call(resource) and code2.call(resource)
    when "or"; code1.call(resource) or code2.call(resource)
    when "=="
      if match1 == "tag"
        resource.tagged?(match2)
      else
        if resource[match1].is_a?(Array)
          resource[match1].include?(match2)
        else
          resource[match1] == match2
        end
      end
    when "!="; resource[match1] != match2
    end
  end

  match = [match1, @oper, match2]
  return match, code
end

#evaluate4x(scope) ⇒ Object

Late binding evaluation of a collect expression (as done in 3x), but with proper Puppet Language semantics for equals and include



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# File 'lib/puppet/parser/ast/collexpr.rb', line 62

def evaluate4x(scope)
  # Make sure our contained expressions have all the info they need.
  [@test1, @test2].each do |t|
    if t.is_a?(self.class)
      t.form ||= self.form
      t.type ||= self.type
    end
  end

  # The code is only used for virtual lookups
  match1, code1 = @test1.safeevaluate scope
  match2, code2 = @test2.safeevaluate scope

  # First build up the virtual code.
  # If we're a conjunction operator, then we're calling code.  I did
  # some speed comparisons, and it's at least twice as fast doing these
  # case statements as doing an eval here.
  code = proc do |resource|
    case @oper
    when "and"; code1.call(resource) and code2.call(resource)
    when "or"; code1.call(resource) or code2.call(resource)
    when "=="
      if match1 == "tag"
        resource.tagged?(match2)
      else
        if resource[match1].is_a?(Array)
          @@compare_operator.include?(resource[match1], match2, scope)
        else
          @@compare_operator.equals(resource[match1], match2)
        end
      end
    when "!="; ! @@compare_operator.equals(resource[match1], match2)
    end
  end

  match = [match1, @oper, match2]
  return match, code
end