Class: Puppet::Parser::AST::IfStatement

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

Overview

A basic ‘if/elsif/else’ statement.

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

#else ⇒ Object 



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

def else
  @else
end

#statements ⇒ Object 



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

def statements
  @statements
end

#test ⇒ Object 



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

def test
  @test
end

Instance Method Details

#each ⇒ Object 



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

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

#evaluate(scope) ⇒ Object

Short-curcuit evaluation. If we’re true, evaluate our statements, else if there’s an ‘else’ setting, evaluate it. the first option that matches.



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# File 'lib/puppet/parser/ast/ifstatement.rb', line 18

def evaluate(scope)
  level = scope.ephemeral_level
  value = @test.safeevaluate(scope)

  # let's emulate a new scope for each branches
  begin
    if Puppet::Parser::Scope.true?(value)
      return @statements.safeevaluate(scope)
    else
      return defined?(@else) ? @else.safeevaluate(scope) : nil
    end
  ensure
    scope.unset_ephemeral_var(level)
  end
end