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

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

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Concurrent::ThreadLocalSingleton

singleton

Constructor Details

#initialize ⇒ TypeCalculator

Returns a new instance of TypeCalculator.



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# File 'lib/puppet/pops/types/type_calculator.rb', line 170

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 109

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

.callable?(callable, args) ⇒ Boolean

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

Parameters:

Returns:

  • (Boolean) —

    true if the callable accepts the arguments



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

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 154

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

.infer(o) ⇒ Object 



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

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

.infer_callable_methods_t(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.

Infers a type if given object may have callable members, else returns nil. Caller must check for nil or if returned type supports members. This is a much cheaper call than doing a call to the general infer(o) method.



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# File 'lib/puppet/pops/types/type_calculator.rb', line 133

def self.infer_callable_methods_t(o)
  # If being a value that cannot have Pcore based methods callable from Puppet Language
  if o.is_a?(String) ||
     o.is_a?(Numeric) ||
     o.is_a?(TrueClass) ||
     o.is_a?(FalseClass) ||
     o.is_a?(Regexp) ||
     o.instance_of?(Array) ||
     o.instance_of?(Hash) ||
     Types::PUndefType::DEFAULT.instance?(o)

    return nil
  end

  # For other objects (e.g. PObjectType instances, and runtime types) full inference needed, since that will
  # cover looking into the runtime type registry.
  #
  infer(o)
end

.infer_set(o) ⇒ Object 



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# File 'lib/puppet/pops/types/type_calculator.rb', line 159

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 296

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 768

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 164

def self.iterable(t)
  singleton.iterable(t)
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 180

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 195

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 330

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?(PClassType) && t2.is_a?(PClassType)
    return PClassType::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?(PTypeType) && t2.is_a?(PTypeType)
    return PTypeType.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

#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 200

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 247

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 255

def infer(o)
  # Optimize the most common cases into direct calls.
  # Explicit if/elsif/else is faster than case
  case o
  when String
    infer_String(o)
  when Integer # need subclasses for Ruby < 2.4
    infer_Integer(o)
  when Array
    infer_Array(o)
  when Hash
    infer_Hash(o)
  when 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 502

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 667

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 680

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 514

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 646

def infer_FalseClass(o)
  PBooleanType::FALSE
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 568

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 524

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 274

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 695

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 573

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 519

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 PTypeType



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# File 'lib/puppet/pops/types/type_calculator.rb', line 509

def infer_Module(o)
  PTypeType.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 583

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 529

def infer_Object(o)
  if o.is_a?(PuppetObject)
    o._pcore_type
  else
    name = o.class.name
    return PRuntimeType.new(:ruby, nil) if name.nil? # anonymous class that doesn't implement PuppetObject is impossible to infer

    ir = Loaders.implementation_registry
    type = ir.nil? ? nil : ir.type_for_module(name)
    return PRuntimeType.new(:ruby, name) if type.nil?

    if type.is_a?(PObjectType) && type.parameterized?
      type = PObjectTypeExtension.create_from_instance(type, o)
    end
    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 PTypeType



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# File 'lib/puppet/pops/types/type_calculator.rb', line 550

def infer_PAnyType(o)
  PTypeType.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 589

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_PTypeType(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 PTypeType This is the metatype short circuit.



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# File 'lib/puppet/pops/types/type_calculator.rb', line 558

def infer_PTypeType(o)
  PTypeType.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 608

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 578

def infer_Regexp(o)
  PRegexpType.new(o)
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 658

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
  PTypeType.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 626

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 281

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 719

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 727

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 715

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 740

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 563

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 614

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 631

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 636

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 641

def infer_TrueClass(o)
  PBooleanType::TRUE
end

#infer_URI(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 651

def infer_URI(o)
  PURIType.new(o)
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 685

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 690

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 303

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 320

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 313

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 188

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 772

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 776

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 495

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 709

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 757

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 483

def superclasses(c)
  result = [c]
  while s = c.superclass # rubocop:disable Lint/AssignmentInCondition
    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 800

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 787

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 213

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
  if c <= Integer
    type = PIntegerType::DEFAULT
  elsif c == Float
    type = PFloatType::DEFAULT
  elsif c == Numeric
    type = PNumericType::DEFAULT
  elsif c == String
    type = PStringType::DEFAULT
  elsif c == Regexp
    type = PRegexpType::DEFAULT
  elsif c == NilClass
    type = PUndefType::DEFAULT
  elsif c == FalseClass || c == TrueClass
    type = PBooleanType::DEFAULT
  elsif c == Class
    type = PTypeType::DEFAULT
  elsif c == Array
    # Assume array of any
    type = PArrayType::DEFAULT
  elsif 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 744

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