Class: Puppet::Parser::AST::CaseStatement

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

Overview

The basic logical structure in Puppet. Supports a list of tests and statement arrays.

Instance Attribute Summary collapse

Attributes inherited from Branch

#children, #pin

Instance Method Summary collapse

Methods inherited from Branch

#initialize

Constructor Details

This class inherits a constructor from Puppet::Parser::AST::Branch

Instance Attribute Details

#default ⇒ Object 



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# File 'lib/puppet/parser/ast/casestatement.rb', line 7

def default
  @default
end

#options ⇒ Object 



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# File 'lib/puppet/parser/ast/casestatement.rb', line 7

def options
  @options
end

#test ⇒ Object 



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# File 'lib/puppet/parser/ast/casestatement.rb', line 7

def test
  @test
end

Instance Method Details

#each ⇒ Object 



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# File 'lib/puppet/parser/ast/casestatement.rb', line 37

def each
  [@test,@options].each { |child| yield child }
end

#evaluate(scope) ⇒ Object

Short-curcuit evaluation. Return the value of the statements for the first option that matches.



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# File 'lib/puppet/parser/ast/casestatement.rb', line 13

def evaluate(scope)
  level = scope.ephemeral_level

  value = @test.safeevaluate(scope)

  # Iterate across the options looking for a match.
  default = nil
  @options.each do |option|
    option.eachopt do |opt|
      return option.safeevaluate(scope) if opt.evaluate_match(value, scope)
    end

    default = option if option.default?
  end

  # Unless we found something, look for the default.
  return default.safeevaluate(scope) if default

  Puppet.debug "No true answers and no default"
  return nil
ensure
  scope.unset_ephemeral_var(level)
end