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

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

#each

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 = {}) ⇒ CollExpr

Returns a new instance of CollExpr.

Raises:

  • (ArgumentError) 


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# File 'lib/vendor/puppet/parser/ast/collexpr.rb', line 51

def initialize(hash = {})
  super

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

Instance Attribute Details

#form ⇒ Object

Returns the value of attribute form.



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

def form
  @form
end

#oper ⇒ Object

Returns the value of attribute oper.



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

def oper
  @oper
end

#parens ⇒ Object

Returns the value of attribute parens.



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

def parens
  @parens
end

#test1 ⇒ Object

Returns the value of attribute test1.



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

def test1
  @test1
end

#test2 ⇒ Object

Returns the value of attribute test2.



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

def test2
  @test2
end

#type ⇒ Object

Returns the value of attribute type.



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

def type
  @type
end

Instance Method Details

#evaluate(scope) ⇒ Object

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



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# File 'lib/vendor/puppet/parser/ast/collexpr.rb', line 12

def evaluate(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