Class: Puppet::Pops::Functions::Dispatcher Private

Inherits:
Object
  • Object
show all
Defined in:
lib/puppet/pops/functions/dispatcher.rb

Overview

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

Evaluate the dispatches defined as Dispatch instances to call the appropriate method on the Function instance.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Dispatcher

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.

Returns a new instance of Dispatcher.



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# File 'lib/puppet/pops/functions/dispatcher.rb', line 10

def initialize()
  @dispatchers = [ ]
end

Instance Attribute Details

#dispatchers ⇒ Object (readonly)

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. 



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# File 'lib/puppet/pops/functions/dispatcher.rb', line 7

def dispatchers
  @dispatchers
end

Instance Method Details

#add(a_dispatch) ⇒ 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.

Adds a dispatch directly to the set of dispathers.



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# File 'lib/puppet/pops/functions/dispatcher.rb', line 54

def add(a_dispatch)
  @dispatchers << a_dispatch
end

#add_dispatch(type, method_name, param_names, block_name, injections, weaving, last_captures) ⇒ 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.

Adds a regular dispatch for one method name



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# File 'lib/puppet/pops/functions/dispatcher.rb', line 48

def add_dispatch(type, method_name, param_names, block_name, injections, weaving, last_captures)
  add(Puppet::Pops::Functions::Dispatch.new(type, method_name, param_names, block_name, injections, weaving, last_captures))
end

#dispatch(instance, calling_scope, args, &block) ⇒ 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.

Dispatches the call to the first found signature (entry with matching type).



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# File 'lib/puppet/pops/functions/dispatcher.rb', line 30

def dispatch(instance, calling_scope, args, &block)
  tc = Puppet::Pops::Types::TypeCalculator.singleton
  actual = tc.infer_set(block_given? ? args + [block] : args)
  found = @dispatchers.find { |d| tc.callable?(d.type, actual) }
  if found
    found.invoke(instance, calling_scope, args, &block)
  else
    raise ArgumentError, Puppet::Pops::Types::TypeMismatchDescriber.describe_signatures(instance.class.name, @dispatchers, actual)
  end
end

#empty? ⇒ Boolean

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.

Answers if dispatching has been defined



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# File 'lib/puppet/pops/functions/dispatcher.rb', line 18

def empty?
  @dispatchers.empty?
end

#signatures ⇒ 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. 



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# File 'lib/puppet/pops/functions/dispatcher.rb', line 73

def signatures
  @dispatchers
end

#to_type ⇒ 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.

Produces a CallableType for a single signature, and a Variant otherwise



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# File 'lib/puppet/pops/functions/dispatcher.rb', line 61

def to_type()
  # make a copy to make sure it can be contained by someone else (even if it is not contained here, it
  # should be treated as immutable).
  #
  callables = dispatchers.map { | dispatch | dispatch.type }

  # multiple signatures, produce a Variant type of Callable1-n (must copy them)
  # single signature, produce single Callable
  callables.size > 1 ?  Puppet::Pops::Types::TypeFactory.variant(*callables) : callables.pop
end