Class: Puppet::Pops::Binder::Producers::EvaluatingProducer

Inherits:

Producer

• Object
• Producer
• Puppet::Pops::Binder::Producers::EvaluatingProducer

Defined in:

lib/puppet/pops/binder/producers.rb

Overview

Evaluates a Puppet Expression and returns the result. This is typically used for strings with interpolated expressions.

Instance Attribute Summary

• #expression ⇒ Object readonly

  A Puppet 3 AST Expression.

Attributes inherited from Producer

#transformer

Instance Method Summary

• #initialize(injector, binding, scope, options) ⇒ EvaluatingProducer constructor

  A new instance of EvaluatingProducer.

• #internal_produce(scope) ⇒ Object private

Methods inherited from Producer

#produce, #producer

Constructor Details

#initialize(injector, binding, scope, options) ⇒ EvaluatingProducer

Returns a new instance of EvaluatingProducer.

Parameters:

• injector (Injector) —

  The injector where the lookup originates

• binding (Bindings::Binding, nil) —

  The binding using this producer

• scope (Puppet::Parser::Scope) —

  The scope to use for evaluation

• options (Hash) —

  a customizable set of options

Options Hash (options):

• :transformer (Model::LambdaExpression) — default: nil —

  a transformer of produced value

• :expression (Array<Model::Expression>) —

  The expression to evaluate

Raises:

• (ArgumentError)

# File 'lib/puppet/pops/binder/producers.rb', line 301

def initialize(injector, binding, scope, options)
  super
  @expression = options[:expression]
  raise ArgumentError, "Option 'expression' must be given to an EvaluatingProducer." unless @expression
end

Instance Attribute Details

#expression ⇒ Object (readonly)

A Puppet 3 AST Expression

# File 'lib/puppet/pops/binder/producers.rb', line 292

def expression
  @expression
end

Instance Method Details

#internal_produce(scope) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

# File 'lib/puppet/pops/binder/producers.rb', line 308

def internal_produce(scope)
  Parser::EvaluatingParser.new.evaluate(scope, expression)
end