Class: Puppet::Pops::Types::RubyGenerator Private

Inherits:
TypeFormatter show all
Defined in:
lib/puppet/pops/types/ruby_generator.rb

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.

Constant Summary collapse

RUBY_RESERVED_WORDS =

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

{
  'alias' => '_alias',
  'begin' => '_begin',
  'break' => '_break',
  'def' => '_def',
  'do' => '_do',
  'end' => '_end',
  'ensure' => '_ensure',
  'for' => '_for',
  'module' => '_module',
  'next' => '_next',
  'nil' => '_nil',
  'not' => '_not',
  'redo' => '_redo',
  'rescue' => '_rescue',
  'retry' => '_retry',
  'return' => '_return',
  'self' => '_self',
  'super' => '_super',
  'then' => '_then',
  'until' => '_until',
  'when' => '_when',
  'while' => '_while',
  'yield' => '_yield',
}
RUBY_RESERVED_WORDS_REVERSED =

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

Hash[RUBY_RESERVED_WORDS.map { |k, v| [v, k] }]

Constants inherited from TypeFormatter

TypeFormatter::NAME_SEGMENT_SEPARATOR, TypeFormatter::STARTS_WITH_ASCII_CAPITAL

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from TypeFormatter

#alias_expanded_string, #append_callable_params, #append_default, #append_indented_string, #append_string, #capitalize_segments, #debug_string, #expanded, #format_type_alias_type, #indented, #indented_string, #ruby, #ruby_string, singleton, #string, string, #string_Array, #string_FalseClass, #string_Hash, #string_Module, #string_NilClass, #string_Numeric, #string_Object, #string_PAnnotatedMember, #string_PAnyType, #string_PArrayType, #string_PBinaryType, #string_PBooleanType, #string_PCallableType, #string_PCatalogEntryType, #string_PClassType, #string_PCollectionType, #string_PDefaultType, #string_PEnumType, #string_PFloatType, #string_PHashType, #string_PInitType, #string_PIntegerType, #string_PIterableType, #string_PIteratorType, #string_PNotUndefType, #string_PNumericType, #string_PObjectType, #string_PObjectTypeExtension, #string_POptionalType, #string_PPatternType, #string_PRegexpType, #string_PResourceType, #string_PRuntimeType, #string_PScalarDataType, #string_PScalarType, #string_PSemVerRangeType, #string_PSemVerType, #string_PSensitiveType, #string_PStringType, #string_PStructType, #string_PTimespanType, #string_PTimestampType, #string_PTupleType, #string_PTypeAliasType, #string_PTypeReferenceType, #string_PTypeSetType, #string_PTypeType, #string_PURIType, #string_PUndefType, #string_PUnitType, #string_PVariantType, #string_PuppetObject, #string_Regexp, #string_String, #string_Symbol, #string_Timespan, #string_Timestamp, #string_TrueClass, #string_URI, #string_Version, #string_VersionRange, #struct_element_pair, #symbolic_key, #to_s

Class Method Details

.protect_reserved_name(name) ⇒ 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/ruby_generator.rb', line 35

def self.protect_reserved_name(name)
  RUBY_RESERVED_WORDS[name] || name
end

.unprotect_reserved_name(name) ⇒ 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/ruby_generator.rb', line 39

def self.unprotect_reserved_name(name)
  RUBY_RESERVED_WORDS_REVERSED[name] || name
end

Instance Method Details

#array_type?(t) ⇒ 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.


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# File 'lib/puppet/pops/types/ruby_generator.rb', line 434

def array_type?(t)
  case t
  when PArrayType
    true
  when POptionalType
    array_type?(t.optional_type)
  when PNotUndefType
    array_type?(t.type)
  when PVariantType
    t.types.all? { |v| array_type?(v) }
  else
    false
  end
end

#class_body(obj, segments, bld) ⇒ 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/ruby_generator.rb', line 201

def class_body(obj, segments, bld)
  unless obj.parent.is_a?(PObjectType)
    bld << "\n  include " << namespace_relative(segments, Puppet::Pops::Types::PuppetObject.name) << "\n\n" # marker interface
    bld << "  def self.ref(type_string)\n"
    bld << '    ' << namespace_relative(segments, Puppet::Pops::Types::PTypeReferenceType.name) << ".new(type_string)\n"
    bld << "  end\n"
  end

  # Output constants
  constants, others = obj.attributes(true).values.partition { |a| a.kind == PObjectType::ATTRIBUTE_KIND_CONSTANT }
  constants = constants.select { |ca| ca.container.equal?(obj) }
  unless constants.empty?
    constants.each { |ca| bld << "\n  def self." << rname(ca.name) << "\n    _pcore_type['" << ca.name << "'].value\n  end\n" }
    constants.each { |ca| bld << "\n  def " << rname(ca.name) << "\n    self.class." << ca.name << "\n  end\n" }
  end

  init_params = others.reject { |a| a.kind == PObjectType::ATTRIBUTE_KIND_DERIVED }
  opt, non_opt = init_params.partition { |ip| ip.value? }
  derived_attrs, obj_attrs = others.select { |a| a.container.equal?(obj) }.partition { |ip| ip.kind == PObjectType::ATTRIBUTE_KIND_DERIVED }

  include_type = obj.equality_include_type? && !(obj.parent.is_a?(PObjectType) && obj.parent.equality_include_type?)
  if obj.equality.nil?
    eq_names = obj_attrs.reject { |a| a.kind == PObjectType::ATTRIBUTE_KIND_CONSTANT }.map(&:name)
  else
    eq_names = obj.equality
  end

  # Output type safe hash constructor
  bld << "\n  def self.from_hash(init_hash)\n"
  bld << '    from_asserted_hash(' << namespace_relative(segments, TypeAsserter.name) << '.assert_instance_of('
  bld << "'" << obj.label << " initializer', _pcore_type.init_hash_type, init_hash))\n  end\n\n  def self.from_asserted_hash(init_hash)\n    new"
  unless non_opt.empty? && opt.empty?
    bld << "(\n"
    non_opt.each { |ip| bld << "      init_hash['" << ip.name << "'],\n" }
    opt.each do |ip|
      if ip.value.nil?
        bld << "      init_hash['" << ip.name << "'],\n"
      else
        bld << "      init_hash.fetch('" << ip.name << "') { "
        default_string(bld, ip)
        bld << " },\n"
      end
    end
    bld.chomp!(",\n")
    bld << ')'
  end
  bld << "\n  end\n"

  # Output type safe constructor
  bld << "\n  def self.create"
  if init_params.empty?
    bld << "\n    new"
  else
    bld << '('
    non_opt.each { |ip| bld << rname(ip.name) << ', ' }
    opt.each do |ip|
      bld << rname(ip.name) << ' = '
      default_string(bld, ip)
      bld << ', '
    end
    bld.chomp!(', ')
    bld << ")\n"
    bld << '    ta = ' << namespace_relative(segments, TypeAsserter.name) << "\n"
    bld << "    attrs = _pcore_type.attributes(true)\n"
    init_params.each do |a|
      bld << "    ta.assert_instance_of('" << a.container.name << '[' << a.name << ']'
      bld << "', attrs['" << a.name << "'].type, " << rname(a.name) << ")\n"
    end
    bld << '    new('
    non_opt.each { |a| bld << rname(a.name) << ', ' }
    opt.each { |a| bld << rname(a.name) << ', ' }
    bld.chomp!(', ')
    bld << ')'
  end
  bld << "\n  end\n"

  unless obj.parent.is_a?(PObjectType) && obj_attrs.empty?
    # Output attr_readers
    unless obj_attrs.empty?
      bld << "\n"
      obj_attrs.each { |a| bld << '  attr_reader :' << rname(a.name) << "\n" }
    end

    bld << "  attr_reader :hash\n" if obj.parent.nil?

    derived_attrs.each do |a|
      bld << "\n  def " << rname(a.name) << "\n"
      code_annotation = RubyMethod.annotate(a)
      ruby_body = code_annotation.nil? ? nil: code_annotation.body
      if ruby_body.nil?
        bld << "    raise Puppet::Error, \"no method is implemented for derived #{a.label}\"\n"
      else
        bld << '    ' << ruby_body << "\n"
      end
      bld << "  end\n"
    end

    if init_params.empty?
      bld << "\n  def initialize\n    @hash = " << obj.hash.to_s << "\n  end" if obj.parent.nil?
    else
      # Output initializer
      bld << "\n  def initialize"
      bld << '('
      non_opt.each { |ip| bld << rname(ip.name) << ', ' }
      opt.each do |ip|
        bld << rname(ip.name) << ' = '
        default_string(bld, ip)
        bld << ', '
      end
      bld.chomp!(', ')
      bld << ')'

      hash_participants = init_params.select { |ip| eq_names.include?(ip.name) }
      if obj.parent.nil?
        bld << "\n    @hash = "
        bld << obj.hash.to_s << "\n" if hash_participants.empty?
      else
        bld << "\n    super("
        super_args = (non_opt + opt).select { |ip| !ip.container.equal?(obj) }
        unless super_args.empty?
          super_args.each { |ip| bld << rname(ip.name) << ', ' }
          bld.chomp!(', ')
        end
        bld << ")\n"
        bld << '    @hash = @hash ^ ' unless hash_participants.empty?
      end
      unless hash_participants.empty?
        hash_participants.each { |a| bld << rname(a.name) << '.hash ^ ' if a.container.equal?(obj) }
        bld.chomp!(' ^ ')
        bld << "\n"
      end
      init_params.each { |a| bld << '    @' << rname(a.name) << ' = ' << rname(a.name) << "\n" if a.container.equal?(obj) }
      bld << "  end\n"
    end
  end

  unless obj_attrs.empty? && obj.parent.nil?
    bld << "\n  def _pcore_init_hash\n"
    bld << '    result = '
    bld << (obj.parent.nil? ? '{}' : 'super')
    bld << "\n"
    obj_attrs.each do |a|
      bld << "    result['" << a.name << "'] = @" << rname(a.name)
      if a.value?
        bld << ' unless '
        equals_default_string(bld, a)
      end
      bld << "\n"
    end
    bld << "    result\n  end\n"
  end

  content_participants = init_params.select { |a| content_participant?(a) }
  if content_participants.empty?
    unless obj.parent.is_a?(PObjectType)
      bld << "\n  def _pcore_contents\n  end\n"
      bld << "\n  def _pcore_all_contents(path)\n  end\n"
    end
  else
    bld << "\n  def _pcore_contents\n"
    content_participants.each do |cp|
      if array_type?(cp.type)
        bld << '    @' << rname(cp.name) << ".each { |value| yield(value) }\n"
      else
        bld << '    yield(@' << rname(cp.name) << ') unless @' << rname(cp.name)  << ".nil?\n"
      end
    end
    bld << "  end\n\n  def _pcore_all_contents(path, &block)\n    path << self\n"
    content_participants.each do |cp|
      if array_type?(cp.type)
        bld << '    @' << rname(cp.name) << ".each do |value|\n"
        bld << "      block.call(value, path)\n"
        bld << "      value._pcore_all_contents(path, &block)\n"
      else
        bld << '    unless @' << rname(cp.name) << ".nil?\n"
        bld << '      block.call(@' << rname(cp.name) << ", path)\n"
        bld << '      @' << rname(cp.name) << "._pcore_all_contents(path, &block)\n"
      end
      bld << "    end\n"
    end
    bld << "    path.pop\n  end\n"
  end

  # Output function placeholders
  obj.functions(false).each_value do |func|
    code_annotation = RubyMethod.annotate(func)
    if code_annotation
      body = code_annotation.body
      params = code_annotation.parameters
      bld << "\n  def " << rname(func.name)
      unless params.nil? || params.empty?
        bld << '(' << params << ')'
      end
      bld << "\n    " << body << "\n"
    else
      bld << "\n  def " << rname(func.name) << "(*args)\n"
      bld << "    # Placeholder for #{func.type}\n"
      bld << "    raise Puppet::Error, \"no method is implemented for #{func.label}\"\n"
    end
    bld << "  end\n"
  end

  unless eq_names.empty? && !include_type
    bld << "\n  def eql?(o)\n"
    bld << "    super &&\n" unless obj.parent.nil?
    bld << "    o.instance_of?(self.class) &&\n" if include_type
    eq_names.each { |eqn| bld << '    @' << rname(eqn) << '.eql?(o.' <<  rname(eqn) << ") &&\n" }
    bld.chomp!(" &&\n")
    bld << "\n  end\n  alias == eql?\n"
  end
end

#class_definition(obj, namespace_segments, bld, class_name, *impl_subst) ⇒ 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/ruby_generator.rb', line 165

def class_definition(obj, namespace_segments, bld, class_name, *impl_subst)
  module_segments = remove_common_namespace(namespace_segments, class_name)
  leaf_name = module_segments.pop
  module_segments.each { |segment| bld << 'module ' << segment << "\n" }
  scoped_class_definition(obj,leaf_name, bld, class_name, *impl_subst)
  module_segments.size.times { bld << "end\n" }
  module_segments << leaf_name
  module_segments.join(TypeFormatter::NAME_SEGMENT_SEPARATOR)
end

#content_participant?(a) ⇒ 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.


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# File 'lib/puppet/pops/types/ruby_generator.rb', line 413

def content_participant?(a)
  a.kind != PObjectType::ATTRIBUTE_KIND_REFERENCE && obj_type?(a.type)
end

#create_class(obj) ⇒ 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.

Raises:

  • (ArgumentError)

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# File 'lib/puppet/pops/types/ruby_generator.rb', line 56

def create_class(obj)
  @dynamic_classes ||= Hash.new do |hash, key|
    cls = key.implementation_class(false)
    if cls.nil?
      rp = key.resolved_parent
      parent_class = rp.is_a?(PObjectType) ? rp.implementation_class : Object
      class_def = ''
      class_body(key, EMPTY_ARRAY, class_def)
      cls = Class.new(parent_class)
      cls.class_eval(class_def)
      cls.define_singleton_method(:_pcore_type) { return key }
      key.implementation_class = cls
    end
    hash[key] = cls
  end
  raise ArgumentError, "Expected a Puppet Type, got '#{obj.class.name}'" unless obj.is_a?(PAnyType)
  @dynamic_classes[obj]
end

#default_string(bld, a) ⇒ 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/ruby_generator.rb', line 449

def default_string(bld, a)
  case a.value
  when nil, true, false, Numeric, String
    bld << a.value.inspect
  else
    bld << "_pcore_type['" << a.name << "'].value"
  end
end

#end_module(common_prefix, aliases, class_names, bld) ⇒ 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/ruby_generator.rb', line 135

def end_module(common_prefix, aliases, class_names, bld)
  # Emit registration of contained type aliases
  unless aliases.empty?
    bld << "Puppet::Pops::Pcore.register_aliases({\n"
    aliases.each { |name, type| bld << "  '" << name << "' => " << TypeFormatter.string(type.to_s) << "\n" }
    bld.chomp!(",\n")
    bld << "})\n\n"
  end

  # Emit registration of contained types
  unless class_names.empty?
    bld << "Puppet::Pops::Pcore.register_implementations([\n"
    class_names.each { |class_name| bld << '  ' << class_name << ",\n" }
    bld.chomp!(",\n")
    bld << "])\n\n"
  end
  bld.chomp!("\n")

  common_prefix.size.times { bld << "end\n" }
end

#equals_default_string(bld, a) ⇒ 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/ruby_generator.rb', line 458

def equals_default_string(bld, a)
  case a.value
  when nil, true, false, Numeric, String
    bld << '@' << a.name << ' == ' << a.value.inspect
  else
    bld << "_pcore_type['" << a.name << "'].default_value?(@" << a.name << ')'
  end
end

#implementation_names(object_types) ⇒ 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/ruby_generator.rb', line 156

def implementation_names(object_types)
  object_types.map do |type|
    ir = Loaders.implementation_registry
    impl_name = ir.module_name_for_type(type)
    raise Puppet::Error, "Unable to create an instance of #{type.name}. No mapping exists to runtime object" if impl_name.nil?
    impl_name
  end
end

#module_definition(types, comment, *impl_subst) ⇒ 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/ruby_generator.rb', line 82

def module_definition(types, comment, *impl_subst)
  object_types, aliased_types = types.partition { |type| type.is_a?(PObjectType) }
  if impl_subst.empty?
    impl_names = implementation_names(object_types)
  else
    impl_names = object_types.map { |type| type.name.gsub(*impl_subst) }
  end

  # extract common implementation module prefix
  names_by_prefix = Hash.new { |hash, key| hash[key] = [] }
  index = 0
  min_prefix_length = impl_names.reduce(Float::INFINITY) do |len, impl_name|
    segments = impl_name.split(TypeFormatter::NAME_SEGMENT_SEPARATOR)
    leaf_name = segments.pop
    names_by_prefix[segments.freeze] << [index, leaf_name, impl_name]
    index += 1
    len > segments.size ? segments.size : len
  end
  min_prefix_length = 0 if min_prefix_length == Float::INFINITY

  common_prefix = []
  segments_array = names_by_prefix.keys
  min_prefix_length.times do |idx|
    segment = segments_array[0][idx]
    break unless segments_array.all? { |sn| sn[idx] == segment }
    common_prefix << segment
  end

  # Create class definition of all contained types
  bld = ''
  start_module(common_prefix, comment, bld)
  class_names = []
  names_by_prefix.each_pair do |seg_array, index_and_name_array|
    added_to_common_prefix = seg_array[common_prefix.length..-1]
    added_to_common_prefix.each { |name| bld << 'module ' << name << "\n" }
    index_and_name_array.each do |idx, name, full_name|
      scoped_class_definition(object_types[idx], name, bld, full_name, *impl_subst)
      class_names << (added_to_common_prefix + [name]).join(TypeFormatter::NAME_SEGMENT_SEPARATOR)
      bld << "\n"
    end
    added_to_common_prefix.size.times { bld << "end\n" }
  end

  aliases = Hash[aliased_types.map { |type| [type.name, type.resolved_type] }]
  end_module(common_prefix, aliases, class_names, bld)
  bld
end

#module_definition_from_typeset(typeset, *impl_subst) ⇒ 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/ruby_generator.rb', line 75

def module_definition_from_typeset(typeset, *impl_subst)
  module_definition(
    typeset.types.values,
    "# Generated by #{self.class.name} from TypeSet #{typeset.name} on #{Date.new}\n",
    *impl_subst)
end

#namespace_relative(namespace_segments, name) ⇒ 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/ruby_generator.rb', line 52

def namespace_relative(namespace_segments, name)
  remove_common_namespace(namespace_segments, name).join(TypeFormatter::NAME_SEGMENT_SEPARATOR)
end

#obj_type?(t) ⇒ 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.


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# File 'lib/puppet/pops/types/ruby_generator.rb', line 417

def obj_type?(t)
  case t
  when PObjectType
    true
  when POptionalType
    obj_type?(t.optional_type)
  when PNotUndefType
    obj_type?(t.type)
  when PArrayType
    obj_type?(t.element_type)
  when PVariantType
    t.types.all? { |v| obj_type?(v) }
  else
    false
  end
end

#remove_common_namespace(namespace_segments, name) ⇒ 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/ruby_generator.rb', line 43

def remove_common_namespace(namespace_segments, name)
  segments = name.split(TypeFormatter::NAME_SEGMENT_SEPARATOR)
  namespace_segments.size.times do |idx|
    break if segments.empty? || namespace_segments[idx] != segments[0]
    segments.shift
  end
  segments
end

#rname(name) ⇒ 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/ruby_generator.rb', line 467

def rname(name)
  RUBY_RESERVED_WORDS[name] || name
end

#scoped_class_definition(obj, leaf_name, bld, class_name, *impl_subst) ⇒ 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/ruby_generator.rb', line 175

def scoped_class_definition(obj, leaf_name, bld, class_name, *impl_subst)
  bld << 'class ' << leaf_name
  segments = class_name.split(TypeFormatter::NAME_SEGMENT_SEPARATOR)

  unless obj.parent.nil?
    if impl_subst.empty?
      ir = Loaders.implementation_registry
      parent_name = ir.module_name_for_type(obj.parent)
      raise Puppet::Error, "Unable to create an instance of #{obj.parent.name}. No mapping exists to runtime object" if parent_name.nil?
    else
      parent_name = obj.parent.name.gsub(*impl_subst)
    end
    bld << ' < ' << namespace_relative(segments, parent_name)
  end

  bld << "\n"
  bld << "  def self._pcore_type\n"
  bld << '    @_pcore_type ||= ' << namespace_relative(segments, obj.class.name) << ".new('" << obj.name << "', "
  bld << TypeFormatter.singleton.ruby('ref').indented(2).string(obj._pcore_init_hash(false)) << ")\n"
  bld << "  end\n"

  class_body(obj, segments, bld)

  bld << "end\n"
end

#start_module(common_prefix, comment, bld) ⇒ 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/ruby_generator.rb', line 130

def start_module(common_prefix, comment, bld)
  bld << '# ' << comment << "\n"
  common_prefix.each { |cp| bld << 'module ' << cp << "\n" }
end