Class: Puppet::Pops::Types::TypeCalculator

Inherits:
Object
  • Object
show all
Defined in:
lib/puppet/pops/types/type_calculator.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ TypeCalculator

Returns a new instance of TypeCalculator.



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# File 'lib/puppet/pops/types/type_calculator.rb', line 147

def initialize
  @@infer_visitor ||= Visitor.new(nil, 'infer',0,0)
  @@extract_visitor ||= Visitor.new(nil, 'extract',0,0)
end

Class Method Details

.assignable?(t1, t2) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 104

def self.assignable?(t1, t2)
  singleton.assignable?(t1,t2)
end

.callable?(callable, args) ⇒ Boolan

Answers, does the given callable accept the arguments given in args (an array or a tuple)

Parameters:

Returns:

  • (Boolan) —

    true if the callable accepts the arguments



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# File 'lib/puppet/pops/types/type_calculator.rb', line 114

def self.callable?(callable, args)
  singleton.callable?(callable, args)
end

.generalize(o) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 124

def self.generalize(o)
  singleton.generalize(o)
end

.infer(o) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 119

def self.infer(o)
  singleton.infer(o)
end

.infer_set(o) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 129

def self.infer_set(o)
  singleton.infer_set(o)
end

.instance?(t, o) ⇒ Boolean

Answers ‘is o an instance of type t’

Returns:

  • (Boolean) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 278

def self.instance?(t, o)
  singleton.instance?(t,o)
end

.is_kind_of_callable?(t, optional = true) ⇒ 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.

Returns:

  • (Boolean) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 736

def self.is_kind_of_callable?(t, optional = true)
  t.is_a?(PAnyType) && t.kind_of_callable?(optional)
end

.iterable(t) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 134

def self.iterable(t)
  singleton.iterable(t)
end

.singleton ⇒ TypeCalculator

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 the singleton instance.

Returns:



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# File 'lib/puppet/pops/types/type_calculator.rb', line 141

def self.singleton
  @tc_instance ||= new
end

Instance Method Details

#assignable?(t, t2) ⇒ Boolean

Answers ‘can an instance of type t2 be assigned to a variable of type t’. Does not accept nil/undef unless the type accepts it.

Returns:

  • (Boolean) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 157

def assignable?(t, t2)
   if t.is_a?(Module)
     t = type(t)
   end
   t.is_a?(PAnyType) ? t.assignable?(t2) : false
end

#callable?(callable, args) ⇒ Boolean

Answers, does the given callable accept the arguments given in args (an array or a tuple)

Returns:

  • (Boolean) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 178

def callable?(callable, args)
  callable.is_a?(PAnyType) && callable.callable?(args)
end

#common_type(t1, t2) ⇒ Object

Answers, ‘What is the common type of t1 and t2?’

TODO: The current implementation should be optimized for performance

Raises:

  • (ArgumentError) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 312

def common_type(t1, t2)
  raise ArgumentError, 'two types expected' unless (is_ptype?(t1) || is_pnil?(t1)) && (is_ptype?(t2) || is_pnil?(t2))

  # TODO: This is not right since Scalar U Undef is Any
  # if either is nil, the common type is the other
  if is_pnil?(t1)
    return t2
  elsif is_pnil?(t2)
    return t1
  end

  # If either side is Unit, it is the other type
  if t1.is_a?(PUnitType)
    return t2
  elsif t2.is_a?(PUnitType)
    return t1
  end

  # Simple case, one is assignable to the other
  if assignable?(t1, t2)
    return t1
  elsif assignable?(t2, t1)
    return t2
  end

  # when both are arrays, return an array with common element type
  if t1.is_a?(PArrayType) && t2.is_a?(PArrayType)
    return PArrayType.new(common_type(t1.element_type, t2.element_type))
  end

  # when both are hashes, return a hash with common key- and element type
  if t1.is_a?(PHashType) && t2.is_a?(PHashType)
    key_type = common_type(t1.key_type, t2.key_type)
    value_type = common_type(t1.value_type, t2.value_type)
    return PHashType.new(key_type, value_type)
  end

  # when both are host-classes, reduce to PHostClass[] (since one was not assignable to the other)
  if t1.is_a?(PHostClassType) && t2.is_a?(PHostClassType)
    return PHostClassType::DEFAULT
  end

  # when both are resources, reduce to Resource[T] or Resource[] (since one was not assignable to the other)
  if t1.is_a?(PResourceType) && t2.is_a?(PResourceType)
    # only Resource[] unless the type name is the same
    return t1.type_name == t2.type_name ?  PResourceType.new(t1.type_name, nil) : PResourceType::DEFAULT
  end

  # Integers have range, expand the range to the common range
  if t1.is_a?(PIntegerType) && t2.is_a?(PIntegerType)
    return PIntegerType.new([t1.numeric_from, t2.numeric_from].min, [t1.numeric_to, t2.numeric_to].max)
  end

  # Floats have range, expand the range to the common range
  if t1.is_a?(PFloatType) && t2.is_a?(PFloatType)
    return PFloatType.new([t1.numeric_from, t2.numeric_from].min, [t1.numeric_to, t2.numeric_to].max)
  end

  if t1.is_a?(PStringType) && (t2.is_a?(PStringType) || t2.is_a?(PEnumType))
    if(t2.is_a?(PEnumType))
      return t1.value.nil? ? PEnumType::DEFAULT : PEnumType.new(t2.values | [t1.value])
    end

    if t1.size_type.nil? || t2.size_type.nil?
      return t1.value.nil? || t2.value.nil? ? PStringType::DEFAULT : PEnumType.new([t1.value, t2.value])
    end

    return PStringType.new(common_type(t1.size_type, t2.size_type))
  end

  if t1.is_a?(PPatternType) && t2.is_a?(PPatternType)
    return PPatternType.new(t1.patterns | t2.patterns)
  end

  if t1.is_a?(PEnumType) && (t2.is_a?(PStringType) || t2.is_a?(PEnumType))
    # The common type is one that complies with either set
    if t2.is_a?(PEnumType)
      return PEnumType.new(t1.values | t2.values)
    end

    return t2.value.nil? ? PEnumType::DEFAULT : PEnumType.new(t1.values | [t2.value])
  end

  if t1.is_a?(PVariantType) && t2.is_a?(PVariantType)
    # The common type is one that complies with either set
    return PVariantType.maybe_create(t1.types | t2.types)
  end

  if t1.is_a?(PRegexpType) && t2.is_a?(PRegexpType)
    # if they were identical, the general rule would return a parameterized regexp
    # since they were not, the result is a generic regexp type
    return PRegexpType::DEFAULT
  end

  if t1.is_a?(PCallableType) && t2.is_a?(PCallableType)
    # They do not have the same signature, and one is not assignable to the other,
    # what remains is the most general form of Callable
    return PCallableType::DEFAULT
  end

  # Common abstract types, from most specific to most general
  if common_numeric?(t1, t2)
    return PNumericType::DEFAULT
  end

  if common_scalar_data?(t1, t2)
    return PScalarDataType::DEFAULT
  end

  if common_scalar?(t1, t2)
    return PScalarType::DEFAULT
  end

  if common_data?(t1,t2)
    return TypeFactory.data
  end

  # Meta types Type[Integer] + Type[String] => Type[Data]
  if t1.is_a?(PType) && t2.is_a?(PType)
    return PType.new(common_type(t1.type, t2.type))
  end

  if common_rich_data?(t1,t2)
    return TypeFactory.rich_data
  end

  # If both are Runtime types
  if t1.is_a?(PRuntimeType) && t2.is_a?(PRuntimeType)
    if t1.runtime == t2.runtime && t1.runtime_type_name == t2.runtime_type_name
      return t1
    end
    # finding the common super class requires that names are resolved to class
    # NOTE: This only supports runtime type of :ruby
    c1 = ClassLoader.provide_from_type(t1)
    c2 = ClassLoader.provide_from_type(t2)
    if c1 && c2
      c2_superclasses = superclasses(c2)
      superclasses(c1).each do|c1_super|
        c2_superclasses.each do |c2_super|
          if c1_super == c2_super
            return PRuntimeType.new(:ruby, c1_super.name)
          end
        end
      end
    end
  end

  # They better both be Any type, or the wrong thing was asked and nil is returned
  t1.is_a?(PAnyType) && t2.is_a?(PAnyType) ? PAnyType::DEFAULT : nil
end

#enumerable(t) ⇒ Object

Returns an iterable if the t represents something that can be iterated



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# File 'lib/puppet/pops/types/type_calculator.rb', line 165

def enumerable(t)
  Puppet.deprecation_warning('TypeCalculator.enumerable is deprecated. Use iterable')
  iterable(t)
end

#equals(left, right) ⇒ Object

Answers if the two given types describe the same type



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# File 'lib/puppet/pops/types/type_calculator.rb', line 183

def equals(left, right)
  return false unless left.is_a?(PAnyType) && right.is_a?(PAnyType)
  # Types compare per class only - an extra test must be made if the are mutually assignable
  # to find all types that represent the same type of instance
  #
  left == right || (assignable?(right, left) && assignable?(left, right))
end

#generalize(o) ⇒ Object

Generalizes value specific types. The generalized type is returned.



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# File 'lib/puppet/pops/types/type_calculator.rb', line 230

def generalize(o)
  o.is_a?(PAnyType) ? o.generalize : o
end

#infer(o) ⇒ Object

Answers ‘what is the single common Puppet Type describing o’, or if o is an Array or Hash, what is the single common type of the elements (or keys and elements for a Hash).



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# File 'lib/puppet/pops/types/type_calculator.rb', line 238

def infer(o)
  # Optimize the most common cases into direct calls.
  # Explicit if/elsif/else is faster than case
  if o.is_a?(String)
    infer_String(o)
  elsif o.is_a?(Integer) # need subclasses for Ruby < 2.4
    infer_Integer(o)
  elsif o.is_a?(Array)
    infer_Array(o)
  elsif o.is_a?(Hash)
    infer_Hash(o)
  elsif o.is_a?(Evaluator::PuppetProc)
    infer_PuppetProc(o)
  else
    @@infer_visitor.visit_this_0(self, o)
  end
end

#infer_and_reduce_type(enumerable) ⇒ Object

Reduce an enumerable of objects to a single common type



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# File 'lib/puppet/pops/types/type_calculator.rb', line 483

def infer_and_reduce_type(enumerable)
  reduce_type(enumerable.map {|o| infer(o) })
end

#infer_Array(o) ⇒ 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/types/type_calculator.rb', line 636

def infer_Array(o)
  if o.instance_of?(Array)
    if o.empty?
      PArrayType::EMPTY
    else
      PArrayType.new(infer_and_reduce_type(o), size_as_type(o))
    end
  else
    infer_Object(o)
  end
end

#infer_Binary(o) ⇒ 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/types/type_calculator.rb', line 649

def infer_Binary(o)
  PBinaryType::DEFAULT
end

#infer_Closure(o) ⇒ 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/types/type_calculator.rb', line 495

def infer_Closure(o)
  o.type
end

#infer_FalseClass(o) ⇒ 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/types/type_calculator.rb', line 620

def infer_FalseClass(o)
  PBooleanType::DEFAULT
end

#infer_Float(o) ⇒ 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/types/type_calculator.rb', line 542

def infer_Float(o)
  PFloatType.new(o, o)
end

#infer_Function(o) ⇒ 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/types/type_calculator.rb', line 505

def infer_Function(o)
  o.class.dispatcher.to_type
end

#infer_generic(o) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 256

def infer_generic(o)
  generalize(infer(o))
end

#infer_Hash(o) ⇒ 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/types/type_calculator.rb', line 664

def infer_Hash(o)
  if o.instance_of?(Hash)
    if o.empty?
      PHashType::EMPTY
    else
      ktype = infer_and_reduce_type(o.keys)
      etype = infer_and_reduce_type(o.values)
      PHashType.new(ktype, etype, size_as_type(o))
    end
  else
    infer_Object(o)
  end
end

#infer_Integer(o) ⇒ 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/types/type_calculator.rb', line 547

def infer_Integer(o)
  PIntegerType.new(o, o)
end

#infer_Iterator(o) ⇒ 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/types/type_calculator.rb', line 500

def infer_Iterator(o)
  PIteratorType.new(o.element_type)
end

#infer_Module(o) ⇒ 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.

The type of all modules is PType



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# File 'lib/puppet/pops/types/type_calculator.rb', line 490

def infer_Module(o)
  PType::new(PRuntimeType.new(:ruby, o.name))
end

#infer_NilClass(o) ⇒ 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/types/type_calculator.rb', line 557

def infer_NilClass(o)
  PUndefType::DEFAULT
end

#infer_Object(o) ⇒ 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/types/type_calculator.rb', line 510

def infer_Object(o)
  if o.is_a?(PuppetObject)
    o._pcore_type
  else
    name = o.class.name
    ir = Loaders.implementation_registry
    type = ir.nil? ? nil : ir.type_for_module(name)
    type.nil? ? PRuntimeType.new(:ruby, name) : type
  end
end

#infer_PAnyType(o) ⇒ 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.

The type of all types is PType



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# File 'lib/puppet/pops/types/type_calculator.rb', line 524

def infer_PAnyType(o)
  PType.new(o)
end

#infer_Proc(o) ⇒ 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.

Parameters:

  • o (Proc) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 563

def infer_Proc(o)
  min = 0
  max = 0
  mapped_types = o.parameters.map do |p|
    case p[0]
    when :rest
      max = :default
      break PAnyType::DEFAULT
    when :req
      min += 1
    end
    max += 1
    PAnyType::DEFAULT
  end
  param_types = Types::PTupleType.new(mapped_types, Types::PIntegerType.new(min, max))
  Types::PCallableType.new(param_types)
end

#infer_PType(o) ⇒ 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.

The type of all types is PType This is the metatype short circuit.



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# File 'lib/puppet/pops/types/type_calculator.rb', line 532

def infer_PType(o)
  PType.new(o)
end

#infer_PuppetProc(o) ⇒ 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/types/type_calculator.rb', line 582

def infer_PuppetProc(o)
  infer_Closure(o.closure)
end

#infer_Regexp(o) ⇒ 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/types/type_calculator.rb', line 552

def infer_Regexp(o)
  PRegexpType.new(o.source)
end

#infer_Resource(o) ⇒ 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.

A Puppet::Parser::Resource, or Puppet::Resource



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# File 'lib/puppet/pops/types/type_calculator.rb', line 627

def infer_Resource(o)
  # Only Puppet::Resource can have a title that is a symbol :undef, a PResource cannot.
  # A mapping must be made to empty string. A nil value will result in an error later
  title = o.title
  title = '' if :undef == title
  PType.new(PResourceType.new(o.type.to_s, title))
end

#infer_Sensitive(o) ⇒ 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/types/type_calculator.rb', line 600

def infer_Sensitive(o)
  PSensitiveType.new(infer(o.unwrap))
end

#infer_set(o) ⇒ Object

Answers ‘what is the set of Puppet Types of o’



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# File 'lib/puppet/pops/types/type_calculator.rb', line 263

def infer_set(o)
  if o.instance_of?(Array)
    infer_set_Array(o)
  elsif o.instance_of?(Hash)
    infer_set_Hash(o)
  elsif o.instance_of?(SemanticPuppet::Version)
    infer_set_Version(o)
  else
    infer(o)
  end
end

#infer_set_Array(o) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 688

def infer_set_Array(o)
  if o.empty?
    PArrayType::EMPTY
  else
    PTupleType.new(o.map {|x| infer_set(x) })
  end
end

#infer_set_Hash(o) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 696

def infer_set_Hash(o)
  if o.empty?
    PHashType::EMPTY
  elsif o.keys.all? {|k| PStringType::NON_EMPTY.instance?(k) }
    PStructType.new(o.each_pair.map { |k,v| PStructElement.new(PStringType.new(k), infer_set(v)) })
  else
    ktype = PVariantType.maybe_create(o.keys.map {|k| infer_set(k) })
    etype = PVariantType.maybe_create(o.values.map {|e| infer_set(e) })
    PHashType.new(unwrap_single_variant(ktype), unwrap_single_variant(etype), size_as_type(o))
  end
end

#infer_set_Object(o) ⇒ Object

Common case for everything that intrinsically only has a single type



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# File 'lib/puppet/pops/types/type_calculator.rb', line 684

def infer_set_Object(o)
  infer(o)
end

#infer_set_Version(o) ⇒ 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/types/type_calculator.rb', line 709

def infer_set_Version(o)
  PSemVerType.new([SemanticPuppet::VersionRange.new(o, o)])
end

#infer_String(o) ⇒ 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/types/type_calculator.rb', line 537

def infer_String(o)
  PStringType.new(o)
end

#infer_Symbol(o) ⇒ 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.

Inference of :default as PDefaultType, and all other are Ruby



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# File 'lib/puppet/pops/types/type_calculator.rb', line 588

def infer_Symbol(o)
  case o
  when :default
    PDefaultType::DEFAULT
  when :undef
    PUndefType::DEFAULT
  else
    infer_Object(o)
  end
end

#infer_Timespan(o) ⇒ 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/types/type_calculator.rb', line 605

def infer_Timespan(o)
  PTimespanType.new(o, o)
end

#infer_Timestamp(o) ⇒ 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/types/type_calculator.rb', line 610

def infer_Timestamp(o)
  PTimestampType.new(o, o)
end

#infer_TrueClass(o) ⇒ 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/types/type_calculator.rb', line 615

def infer_TrueClass(o)
  PBooleanType::DEFAULT
end

#infer_Version(o) ⇒ 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/types/type_calculator.rb', line 654

def infer_Version(o)
  PSemVerType::DEFAULT
end

#infer_VersionRange(o) ⇒ 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/types/type_calculator.rb', line 659

def infer_VersionRange(o)
  PSemVerRangeType::DEFAULT
end

#instance?(t, o) ⇒ Boolean

Answers ‘is o an instance of type t’

Returns:

  • (Boolean) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 285

def instance?(t, o)
  if t.is_a?(Module)
    t = type(t)
  end
  t.is_a?(PAnyType) ? t.instance?(o) : false
end

#is_pnil?(t) ⇒ Boolean

Answers if t represents the puppet type PUndefType

Returns:

  • (Boolean) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 302

def is_pnil?(t)
  t.nil? || t.is_a?(PUndefType)
end

#is_ptype?(t) ⇒ Boolean

Answers if t is a puppet type

Returns:

  • (Boolean) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 295

def is_ptype?(t)
  t.is_a?(PAnyType)
end

#iterable(t) ⇒ Object

Returns an iterable if the t represents something that can be iterated



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# File 'lib/puppet/pops/types/type_calculator.rb', line 171

def iterable(t)
  # Create an iterable on the type if possible
  Iterable.on(t)
end

#max(a, b) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 740

def max(a,b)
  a >=b ? a : b
end

#min(a, b) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 744

def min(a,b)
  a <= b ? a : b
end

#reduce_type(enumerable) ⇒ Object

Reduces an enumerable of types to a single common type.



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# File 'lib/puppet/pops/types/type_calculator.rb', line 476

def reduce_type(enumerable)
  enumerable.reduce(nil) {|memo, t| common_type(memo, t) }
end

#size_as_type(collection) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 678

def size_as_type(collection)
  size = collection.size
  PIntegerType.new(size, size)
end

#size_range(range) ⇒ Object

Transform int range to a size constraint if range == nil the constraint is 1,1 if range.from == nil min size = 1 if range.to == nil max size == Infinity



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# File 'lib/puppet/pops/types/type_calculator.rb', line 726

def size_range(range)
  return [1,1] if range.nil?
  from = range.from
  to = range.to
  x = from.nil? ? 1 : from
  y = to.nil? ? TheInfinity : to
  [x, y]
end

#superclasses(c) ⇒ Object

Produces the superclasses of the given class, including the class



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# File 'lib/puppet/pops/types/type_calculator.rb', line 464

def superclasses(c)
  result = [c]
  while s = c.superclass
    result << s
    c = s
  end
  result
end

#to_s ⇒ Object

Debugging to_s to reduce the amount of output



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# File 'lib/puppet/pops/types/type_calculator.rb', line 768

def to_s
  '[a TypeCalculator]'
end

#tuple_entry_at(tuple_t, from, to, index) ⇒ 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 the tuple entry at the given index given a tuple type, its from/to constraints on the last type, and an index. Produces nil if the index is out of bounds from must be less than to, and from may not be less than 0



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# File 'lib/puppet/pops/types/type_calculator.rb', line 755

def tuple_entry_at(tuple_t, from, to, index)
  regular = (tuple_t.types.size - 1)
  if index < regular
    tuple_t.types[index]
  elsif index < regular + to
    # in the varargs part
    tuple_t.types[-1]
  else
    nil
  end
end

#type(c) ⇒ Object

Answers ‘what is the Puppet Type corresponding to the given Ruby class’

Parameters:

  • c (Module) —

    the class for which a puppet type is wanted

Raises:

  • (ArgumentError) 


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# File 'lib/puppet/pops/types/type_calculator.rb', line 195

def type(c)
  raise ArgumentError, 'Argument must be a Module' unless c.is_a? Module

  # Can't use a visitor here since we don't have an instance of the class
  case
  when c <= Integer
    type = PIntegerType::DEFAULT
  when c == Float
    type = PFloatType::DEFAULT
  when c == Numeric
    type = PNumericType::DEFAULT
  when c == String
    type = PStringType::DEFAULT
  when c == Regexp
    type = PRegexpType::DEFAULT
  when c == NilClass
    type = PUndefType::DEFAULT
  when c == FalseClass, c == TrueClass
    type = PBooleanType::DEFAULT
  when c == Class
    type = PType::DEFAULT
  when c == Array
    # Assume array of any
    type = PArrayType::DEFAULT
  when c == Hash
    # Assume hash of any
    type = PHashType::DEFAULT
 else
    type = PRuntimeType.new(:ruby, c.name)
  end
  type
end

#unwrap_single_variant(possible_variant) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 713

def unwrap_single_variant(possible_variant)
  if possible_variant.is_a?(PVariantType) && possible_variant.types.size == 1
    possible_variant.types[0]
  else
    possible_variant
  end
end