Message/Util/PerlCode.dis

Module:
  @QName:
    Util:PerlCode
  @FullName:
    @@lang: en
    @@@:
      Perl Code Constructor
  @Namespace:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/PerlCode#
  
  @Description:
    @@lang:en
    @@@:
      This module provides an object-oriented interface to construct 
      Perl code. 

  @DISCore:author: DISCore|Wakaba
  @License:
    @@@:
      license:Perl+MPL
    @@Original:
      @@@FullName:
        manakai <CODE::lib/manakai/genlib.pl>
      @@@Year:2004
      @@@DISCore:author: DISCore|Wakaba
  @Date:
    @@@:
      $Date: 2006/01/29 07:09:25 $
    @@ContentType:
      dis:Date.RCS
  
  @Require:
    @@Module:
      @@@QName: MDOM|DOMCore
      @@@WithFor: ManakaiDOM|ManakaiDOMLatest

  @DefaultFor: ManakaiDOM|ManakaiDOMLatest

Namespace:
  @DIS:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/DIS#
  @dis:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/lang#dis--
  @dx:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/Error/DOMException#
  @ecore:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/Error/Core/
  @f:
    http://suika.fam.cx/~wakaba/archive/2004/dom/feature#
  @idl:
    http://suika.fam.cx/~wakaba/archive/2004/dis/IDL#
  @kwd:
    http://suika.fam.cx/~wakaba/archive/2005/rfc2119/
  @lang:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/lang#
  @license:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/license#
  @ManakaiDOM:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/manakai-dom#
  @MDOM:
    http://suika.fam.cx/~wakaba/archive/2004/8/18/manakai-dom#ManakaiDOM.
  @MDOMX:
    http://suika.fam.cx/~wakaba/archive/2004/8/4/manakai-dom-exception#
  @mn:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/ManakaiNode#
  @pc:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/PerlCode#
  @pc2:
    http://suika.fam.cx/~wakaba/archive/2005/12/pc/
  @rdf:
    http://www.w3.org/1999/02/22-rdf-syntax-ns#
  @rdfs:
    http://www.w3.org/2000/01/rdf-schema#
  @s:
    http://suika.fam.cx/~wakaba/archive/2004/dis/Markup#
  @test:
    http://suika.fam.cx/~wakaba/archive/2004/dis/Test#
  @Util:
    http://suika.fam.cx/~wakaba/archive/2005/manakai/Util/

## -- Module sets

ResourceDef:
  @QName: Util|
  @For: ManakaiDOM|DOM
  @rdf:type: dis|ModuleGroup
  @FullName:
    @@lang:en
    @@@:
      Manakai support modules
  @DISPerl:packageName:
    Message::Util::
  @DISPerl:interfacePackageName:
    @@@:
      Message::Util::IF::
    @@For: ManakaiDOM|ManakaiDOM !ManakaiDOM|ManakaiDOMLatest
  @DISPerl:interfacePackageName:
    @@@:
      Message::Util::IFLatest::
    @@For: ManakaiDOM|ManakaiDOMLatest
  @ImplNote:
    @@lang:en
    @@@:
      Resources <Q::Util|> for <Q::ManakaiDOM|all> and for <Q::ManakaiDOM|Perl>
      is defined in module <Module::Util|ManakaiNode>.

## -- Features

ElementTypeBinding:
  @Name: FeatureDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DOMFeature|Feature
    @@For: =ManakaiDOM|all

ElementTypeBinding:
  @Name: FeatureVerDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DOMFeature|Feature

ElementTypeBinding:
  @Name: featureQName
  @ElementType:
    DOMFeature:name
  @ShadowContent:
    @@ContentType: DISCore|QName

FeatureDef:
  @QName: CoreFeature
  @featureQName:
    Util:PerlCode
  @FeatureVerDef:
    @@QName: CoreFeature10
    @@Version: 1.0
    @@ISA: CoreFeature
    @@FullName:
      @@@lang:en
      @@@@:
        Perl Code Constructor, version 1.0
    @@Description:
      @@@lang:en
      @@@@:
        Perl Code Constructor, version 1.0.

ElementTypeBinding:
  @Name: IFClsDef
  @ElementType: 
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      @@@@: dis|MultipleResource
      @@@ForCheck: !ManakaiDOM|ForIF !ManakaiDOM|ForClass
    @@resourceFor: ManakaiDOM|ForIF
    @@resourceFor: ManakaiDOM|ForClass
    @@For: ManakaiDOM|ManakaiDOM

    @@rdf:type:
      @@@@: DISLang|Interface
      @@@ForCheck: ManakaiDOM|ForIF

    @@rdf:type:
      @@@@: DISLang|Class
      @@@ForCheck: ManakaiDOM|ForClass
    @@Implement:
      @@@@: ||ManakaiDOM|ManakaiDOM||ManakaiDOM|ForIF
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass ManakaiDOM|ManakaiDOM
    @@Implement:
      @@@@: ||ManakaiDOM|ManakaiDOMLatest||ManakaiDOM|ForIF
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass ManakaiDOM|ManakaiDOMLatest

    @@f:implements: pc|CoreFeature10

ElementTypeBinding:
  @Name: IFClsETDef
  @ElementType: 
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      @@@@: dis|MultipleResource
      @@@ForCheck: !ManakaiDOM|ForIF !ManakaiDOM|ForClass !s|ForML
    @@resourceFor: ManakaiDOM|ForIF
    @@resourceFor: ManakaiDOM|ForClass
    @@resourceFor: s|ForML
    @@For: ManakaiDOM|ManakaiDOM

    @@rdf:type:
      @@@@: DISLang|Interface
      @@@ForCheck: ManakaiDOM|ForIF

    @@rdf:type:
      @@@@: DISLang|Class
      @@@ForCheck: ManakaiDOM|ForClass
    @@Implement:
      @@@@: ||ManakaiDOM|ManakaiDOM||ManakaiDOM|ForIF
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass ManakaiDOM|ManakaiDOM
    @@Implement:
      @@@@: ||ManakaiDOM|ManakaiDOMLatest||ManakaiDOM|ForIF
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass ManakaiDOM|ManakaiDOMLatest

    @@s:elementType:
      @@@@: ||+||s|ForML
      @@@ContentType: DISCore|TFPQNames
      @@@DISCore:stopISARecursive:1

    @@rdf:type:
      @@@@: s|ElementType
      @@@ForCheck: s|ForML

    @@f:implements: pc|CoreFeature10

ElementTypeBinding:
  @Name: IFQName
  @ElementType:
    dis:QName
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForIF

ElementTypeBinding:
  @Name: CQName
  @ElementType:
    dis:QName
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: IFISA
  @ElementType:
    dis:ISA
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForIF

ElementTypeBinding:
  @Name: CISA
  @ElementType:
    dis:ISA
  @ShadowContent:
    @@ForCheck: ManakaiDOM|ForClass

## -- Classes

IFClsDef:
  @IFQName: PerlCode
  @CQName: ManakaiPCCode

  @CISA: DOMCore|ManakaiDOMElement

  @enDesc:
    A class on which another Perl code classes are constructed based. 

  @Attr:
    @@Name: fileNode
    @@enDesc:
      The root <QUOTE::file> node of the tree to which this node belongs.
    @@Type: PerlCode
    @@Get:
      @@@enDesc:
        The <QUOTE::file> node of the tree.
      @@@nullCase:
        @@@@enDesc:
          This node does not belong to any file tree.
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>
                      -><AG::Document.documentElement>;
            if ($r) {
              unless (defined $r-><AG::Node.namespaceURI> and
                      $r-><AG::Node.namespaceURI> eq <Q::pc:> and
                      $r-><AG::Node.localName> eq 'file') {
                $r = null;
              }
            }
          }__;

  @Method:
    @@Name: replaceVariable
    @@enDesc:
      Replaces a variable. 
      \
      {NOTE:: For objects of type <Class::ManakaiPerlFile>, 
              <Class::ManakaiPerlPackageScope>,
              <Class::ManakaiPerlSub> and
              <Class::ManakaiPerlVariable>, the result is undefined.
      \
      }
    @@Param:
      @@@Name: originalVariable
      @@@Type:
        lang:Perl::ManakaiDOM:all
      @@@enDesc:
        Original variable specification, including prefix. 
        \
        {NOTE:: Qualified name variable and hash key is not supported.
        \
        }
    @@Param:
      @@@Name: newValue
      @@@Type: 
        DOMMain:any::ManakaiDOM:all
      @@@enDesc:
        New value to replace.
      @@@InCase:
        @@@@Type: PerlCode
        @@@@enDesc:
          New Perl code fragment to replace by.
      @@@InCase:
        @@@@Type:
          lang:Perl::ManakaiDOM:all
        @@@@enDesc:
          Inline Perl code fragment string to replace by.
    @@Return:
      @@@PerlDef:
          my $ln = $self-><AG::Node.localName>;
          if ($ln eq 'unparsed' or
              $ln eq 'inlineUnparsed') {
            my $new_var = ref $newValue ? $newValue->stringify : ''.$newValue;
            my $val = $self-><AG::Node.textContent>;
            $val =~ s/\Q$originalVariable\E\b/$new_var/g;
            $self-><AS::Node.textContent> ($val);
          } elsif ($ln eq 'stringLiteral' or $ln eq 'atom' or
                   $ln eq 'tokens') {
            # 
          } elsif ($self-><M::Node.hasChildNodes>) {
            __DEEP{
              my @child_nodes = @{$self-><AG::Node.childNodes>};
              for my $child_node (@child_nodes) {
                if (defined $child_node-><AG::Node.namespaceURI> and
                    $child_node-><AG::Node.namespaceURI> eq <Q::pc:>) {
                  if ($child_node-><AG::Node.localName> eq 'variable') {
                    if (substr ($originalVariable, 0, 1) eq
                          $child_node-><AG::PerlVariable.variableType> and
                        not defined $child_node-><AG::PerlVariable.packageName> and
                        substr ($originalVariable, 1) eq
                          $child_node-><AG::PerlVariable.pcLocalName> and
                        not defined $child_node-><AG::PerlVariable.hashKey>) {
                      if (ref $newValue) {
                        $self-><M::Node.replaceChild> ($child_node => $newValue);
                      } else {  ## ISSUE: Is this correct?
                        $child_node-><M::PerlCodeInlines.appendCode> ($newValue);
                      }
                    }
                  } else {  ## Non-variable child
                    $child_node-><M::PerlCode.replaceVariable>
                                              ($originalVariable => $newValue);
                  }
                } else {
                  # 
                }
              }
            }__;
          } # has child

  @ResourceDef:
    @@ForCheck: ManakaiDOM|ForClass
    @@QName: addNameListAttr
    @@rdf:type: DISPerl|BlockCode
    @@PerlDef:
      my $__v = $node-><M::Element.getAttributeNS> (<Q::pc:>, $attrName);
      my %__mn = map {$_ => true}
                 split /\s+/, defined $__v ? $__v : '';
      $__mn{$newName} = true;
      $node-><M::Element.setAttributeNS>
                      (<Q::pc:>, 'pc:'.$attrName => join ' ', keys %__mn);


  @Method:
    @@Name: addUsePerlModuleName
    @@enDesc:
      Adds a Perl module into the list of Perl modules 
      <Perl::use>d by this code fragment.
    @@Param:
      @@@Name: moduleName
      @@@Type: DOMString
      @@@enDesc:
        The name of the module package that should be <Perl::use>d.
    @@Return:
      @@@PerlDef:
          __DEEP{
            __CODE{addNameListAttr::
              $node => {$self},
              $attrName => 'useModuleName',
              $newName => {$moduleName},
            }__;
          }__;

  @Method:
    @@Name: addUseCharClassName
    @@enDesc:
      Adds a Perl module into the list of Perl character classes 
      <Perl::use>d by this code fragment.
    @@Param:
      @@@Name: moduleName
      @@@Type: DOMString
      @@@enDesc:
        The name of the module package that should be <Perl::use>d.
    @@Param:
      @@@Name: charClassName
      @@@Type: DOMString
      @@@enDesc:
        The name of the character class.
    @@Return:
      @@@PerlDef:
          __DEEP{
            __CODE{addNameListAttr::
              $node => {$self},
              $attrName => 'useCharClassName',
              $newName => {$moduleName.'.'.$charClassName},
            }__;
          }__;

  @Method:
    @@Name: addRequirePerlModuleName
    @@enDesc:
      Adds a Perl module into the list of Perl modules 
      <Perl::require>d by this code fragment.
    @@Param:
      @@@Name: moduleName
      @@@Type: DOMString
      @@@enDesc:
        The name of the module package that should be <Perl::require>d.
    @@Return:
      @@@PerlDef:
          __DEEP{
            __CODE{addNameListAttr::
              $node => {$self},
              $attrName => 'requireModuleName',
              $newName => {$moduleName},
            }__;
          }__;

  @Method:
    @@Name: addExceptionInterfacePackageName
    @@enDesc:
      Adds a Perl exception interface into the list of Perl packages.
    @@Param:
      @@@Name: moduleName
      @@@Type: DOMString
      @@@enDesc:
        The name of the interface package.
    @@Return:
      @@@PerlDef:
          __DEEP{
            __CODE{addNameListAttr::
              $node => {$self},
              $attrName => 'exceptionInterfaceName',
              $newName => {$moduleName},
            }__;
          }__;

  @ResourceDef:
    @@ForCheck: ManakaiDOM|ForClass
    @@QName: getNameListAttrR
    @@rdf:type: DISPerl|BlockCode
    @@PerlDef:
      my @__nodes = ($node);
      my %__result;
      while (@__nodes) {
        my $__cnode = shift @__nodes;
        if ($__cnode-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>) {
          my $__v = $__cnode-><M::Element.getAttributeNS>
                               (<Q::pc:>, $attrName);
          for (split /\s+/, defined $__v ? $__v : '') {
            $__result{$_} = true;
          }
          push @__nodes, @{$__cnode-><AG::Node.childNodes>};
        }
      }
      $result = [sort {$a cmp $b} keys %__result];
  @ResourceDef:
    @@ForCheck: ManakaiDOM|ForClass
    @@QName: getNameListAttrRM
    @@rdf:type: DISPerl|BlockCode
    @@enDesc:
      Except <Q::pc:require> subtree.
    @@PerlDef:
      my @__nodes = ();
      my %__result;
      {
        my $__cnode = $node;
        if ($__cnode-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>) {
          my $__v = $__cnode-><M::Element.getAttributeNS>
                               (<Q::pc:>, $attrName);
          for (split /\s+/, defined $__v ? $__v : '') {
            $__result{$_} = true;
          }
          push @__nodes, @{$__cnode-><AG::Node.childNodes>};
        }
      }
      N: while (@__nodes) {
        my $__cnode = shift @__nodes;
        if ($__cnode-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>) {
          if (defined $__cnode-><AG::Node.namespaceURI> and
              $__cnode-><AG::Node.namespaceURI> eq <Q::pc:> and
              $__cnode-><AG::Node.localName> eq 'package') {
            next N;
          }
          my $__v = $__cnode-><M::Element.getAttributeNS>
                               (<Q::pc:>, $attrName);
          for (split /\s+/, defined $__v ? $__v : '') {
            $__result{$_} = true;
          }
          push @__nodes, @{$__cnode-><AG::Node.childNodes>};
        }
      }
      $result = [sort {$a cmp $b} keys %__result];
  @ResourceDef:
    @@ForCheck: ManakaiDOM|ForClass
    @@QName: getNameListAttr
    @@rdf:type: DISPerl|BlockCode
    @@PerlDef:
      my %__result;
      my $__v = $node-><M::Element.getAttributeNS> (<Q::pc:>, $attrName);
      for (split /\s+/, defined $__v ? $__v : '') {                 
        $__result{$_} = true;
      }
      $result = [sort {$a cmp $b} keys %__result];

  @Method:
    @@Name: getUsePerlModuleNameList
    @@enDesc:
      Returns a list of Perl modules names that is <Perl::use>d
      by this code fragment, including all descendant nodes
      except <Q::pc:package> nodes and their descendant nodes. 
    @@Return:
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        A list of module names.  Note that the list is <EM::dead>; 
        any modification to it does not affect to the code fragment
        and vice versa.
      @@@PerlDef:
          __DEEP{
            __CODE{getNameListAttrRM::
              $node => {$self},
              $attrName => 'useModuleName',
              $result => {$r},
            }__;
          }__;

  @Method:
    @@Name: getUseCharClassNameList
    @@enDesc:
      Returns a list of Perl character class names that is <Perl::use>d
      by this code fragment, including all descendant nodes
      except <Q::pc:package> nodes and their descendant nodes. 
    @@Return:
      @@@Type: DISPerl|HASH||ManakaiDOM|all
      @@@enDesc:
        A list of module names.  Note that the list is <EM::dead>; 
        any modification to it does not affect to the code fragment
        and vice versa.
      @@@PerlDef:
          my $mc;
          __DEEP{
            __CODE{getNameListAttrRM::
              $node => {$self},
              $attrName => 'useCharClassName',
              $result => {$mc},
            }__;
          }__;
          for (@$mc) {
            my ($m, $c) = split /\./, $_, 2;
            $r->{$m}->{$c} = true;
          }

  @Method:
    @@Name: getRequirePerlModuleNameList
    @@enDesc:
      Returns a list of Perl modules names that is <Perl::require>d
      by this code fragment, including all descendant nodes. 
    @@Return:
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        A list of module names.  Note that the list is <EM::dead>; 
        any modification to it does not affect to the code fragment
        and vice versa.
      @@@PerlDef:
          __DEEP{
            __CODE{getNameListAttrR::
              $node => {$self},
              $attrName => 'requireModuleName',
              $result => {$r},
            }__;
          }__;

  @Method:
    @@Name: getExceptionInterfacePackageNameList
    @@enDesc:
      Returns a list of Perl exception interface package names 
      by this code fragment, including all descendant nodes. 
    @@Return:
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        A list of package names.  Note that the list is <EM::dead>; 
        any modification to it does not affect to the code fragment
        and vice versa.
      @@@PerlDef:
          __DEEP{
            __CODE{getNameListAttrR::
              $node => {$self},
              $attrName => 'exceptionInterfaceName',
              $result => {$r},
            }__;
          }__;

  @Method:
    @@Name: disAddRequireURI
    @@enDesc:
      Adds a <QUOTE::dis> resource into the list of <Perl::require>d
      resources of this code fragment.
    @@Param:
      @@@Name: uriArg
      @@@Type: DOMString
      @@@enDesc:
        The URI reference of the resource to add.
    @@Return:
      @@@PerlDef:
          __DEEP{
            __CODE{addNameListAttr::
              $node => {$self},
              $attrName => 'requireResourceURI',
              $newName => {$uriArg},
            }__;
          }__;

  @Method:
    @@Name: disGetRequireURIList
    @@enDesc:
      Returns a list of <QUOTE::dis> resource URI references that is
      <Perl::require>d by this code fragment, including all descendant nodes. 
    @@Return:
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        A list of resource URI references.  Note that the list is <EM::dead>; 
        any modification to it does not affect to the code fragment
        and vice versa.
      @@@PerlDef:
          __DEEP{
            __CODE{getNameListAttrR::
              $node => {$self},
              $attrName => 'requireResourceURI',
              $result => {$r},
            }__;
          }__;

  @Method:
    @@ForCheck: ManakaiDOM|ForClass
    @@Operator: DISPerl|CloneMethod
    @@Return:
      @@@Type: PerlCode
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Node.cloneNode> (true);
        }__;
##PerlCode

PropDef:
  @QName: useModuleName
  @enDesc:
    The list of modules. 

PropDef:
  @QName: pc|exceptionInterfaceName
  @enDesc:
    The list of exception interface packages.

PropDef:
  @QName: useCharClassName
  @enDesc:
    The list of modules. 

PropDef:
  @QName: requireResourceURI
  @enDesc:
    The list of resources.

ElementTypeBinding:
  @Name: ETQName
  @ElementType:
    dis:AppName
  @ShadowContent:
    @@ForCheck: s|ForML
    @@ContentType: DISCore|QName

IFClsETDef:
  @IFQName: PerlFile
  @CQName: ManakaiPCFile
  @ETQName: pc|file
  @QName:
    @@@: pc|file
    @@ForCheck: s|ForML

  @IFISA: PerlCode

  @IFISA: PerlCodeStatements
  @CISA: ManakaiPCCodeStatements

  @enDesc:
    Perl source code files.

  @Method:
    @@Name: appendNewPackage
    @@enDesc:
      Appends a new package scope block. 
    @@Param:
      @@@Name: packageName
      @@@Type: DOMString
      @@@enDesc:
        The fully-qualified name of the package to create. 
    @@Return:
      @@@Type: PerlPackage
      @@@enDesc:
        The newly created package scope object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                          (<Q::pc:>, 'package');
            $r-><AS::PerlPackage.packageName> ($packageName);
            $self-><M::Node.appendChild> ($r);
          }__;

  @Method:
    @@Name: appendPackage
    @@enDesc:
      Appends a Perl package scope object.
    @@Param:
      @@@Name: codeArg
      @@@Type: PerlPackage
      @@@enDesc:
        The package to append.
    @@Return:
      @@@RaiseException:
        @@@@@:IN_USE_NODE_ERR
        @@@@enDesc:
          An attempt is made to set a subroutine that is 
          already used elsewhere. 
      @@@PerlDef:
          if ($codeArg-><AG::Node.parentNode>) {
            __EXCEPTION{IN_USE_NODE_ERR::
              pc:childNode => {$codeArg},
              MDOMX:param-name => 'codeArg',
            }__;
          }
          __DEEP{
            $self-><AG::Node.ownerDocument>-><M::Document.adoptNode> ($codeArg);
            $self-><M::Node.appendChild> ($codeArg);
          }__;

  @Method:
    @@Name: getLastPackage
    @@enDesc:
      Gets the last package scope block of a name. 
    @@Param:
      @@@Name: packageName
      @@@@Type: DOMString
      @@@@enDesc:
        The fully-qualified name of the package to get. 
    @@NamedParam:
      @@@Name: makeNewPackage
      @@@Type: idl|boolean||ManakaiDOM|all
      @@@enDesc:
        Whether a new package scope object should be created if 
        no package of <P::packageName> found. 
      @@@TrueCase:
        @@@@enDesc:
          Makes a new object if not found. 
      @@@FalseCase:
        @@@@enDesc:
          Don't make a new object. 
    @@Return:
      @@@Type: PerlPackage
      @@@enDesc:
        The last package scope object whose name is equal to 
        <P::packageName>.
      @@@nullCase:
        @@@@enDesc:
          There is no <P::packageName> package object and 
          the <P::makeNewPackage> parameter is set to <DOM::false>. 
      @@@PerlDef:
          __DEEP{
            for my $child (@{$self-><AG::Node.childNodes>}) {
              if ($child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                  defined $child-><AG::Node.namespaceURI> and
                  $child-><AG::Node.namespaceURI> eq <Q::pc:> and
                  $child-><AG::Node.localName> eq 'package') {
                my $v = $child-><M::Element.getAttributeNS>
                               (<Q::pc:>, 'packageName');
                if (defined $v and $v eq $packageName) {
                  $r = $child;
                }
              }
            }
            if (not $r and $makeNewPackage) {
              $r = $self-><M::PerlFile.appendNewPackage> ($packageName);
            }
          }__;

  @ATTR:
    @@Name: sourceFile
    @@ATTRQName: pc|sourceFile
    @@enDesc:
      The file name of the source file from which this 
      Perl code is primary generated. 
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ATTR:
    @@Name: sourceModule
    @@ATTRQName: pc|sourceModule
    @@enDesc:
      The name URI reference of the source module that this package defines.
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ATTR:
    @@Name: sourceFor
    @@ATTRQName: pc|sourceFor
    @@enDesc:
      The URI reference of the source module <QUOTE::for> for which this 
      package is. 
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        The Perl code generated. 
      @@@PerlDef:
          __DEEP{
            ## -- Header
            $r = qq<#!/usr/bin/perl \n>;
            $r .= <ClassM::ManakaiPCImplementation.perlComment>
                    (q<This file is automatically generated>);
            $r .= <ClassM::ManakaiPCImplementation.perlComment>
                   (q<  at >.<ClassM::ManakaiPCImplementation
                                             .rfc3339DateTime> (time).q<,>);
            $r .= <ClassM::ManakaiPCImplementation.perlComment>
                    (q< from file ">.$self-><AG::PerlFile.sourceFile>.q<",>);
            $r .= <ClassM::ManakaiPCImplementation.perlComment>
                    (q[ module <].$self-><AG::PerlFile.sourceModule>.q[>,]);
            $r .= <ClassM::ManakaiPCImplementation.perlComment>
                    (q[ for <].$self-><AG::PerlFile.sourceFor>.q[>.]);
            $r .= <ClassM::ManakaiPCImplementation.perlComment>
                    (q<Don't edit by hand!>);
            $r .= qq<use strict;\n>;
            $self-><AS::PerlFile.currentPackage> ('main');
            $self-><AS::PerlFile.currentChunkNumber> (0);

            ## -- |require| Perl Modules
            my $req = $self-><M::PerlCode.getRequirePerlModuleNameList>;
            for my $pack (sort {$a cmp $b} @$req) {
              $r .= qq<require $pack;\n>;
            }

            ## -- |use| Perl Modules
            for my $pack (sort {$a cmp $b} @{$self-><M::PerlCode
                                                 .getUsePerlModuleNameList>}) {
              $r .= 'use ' . $pack . ";\n";
            }

            ## -- |use| Character Classes
            my $cls = $self-><M::PerlCode.getUseCharClassNameList>;
            for my $pack (sort {$a cmp $b} keys %$cls) {
              $r .= 'use ' . $pack . ' ' .
                <ClassM::ManakaiPCImplementation.perlList>
                   ([sort {$a cmp $b} grep {$cls->{$pack}->{$_}}
                     keys %{$cls->{$pack}}]) . ";\n";
            }

            ## -- Packages and global objects
            my $pack = {};
            for my $child (@{$self-><AG::Node.childNodes>}) {
              $r .= $child->stringify;
              if ($child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                  defined $child-><AG::Node.namespaceURI> and
                  $child-><AG::Node.namespaceURI> eq <Q::pc:> and
                  $child-><AG::Node.localName> eq 'package') {
                for my $ipack (@{$child-><M::PerlPackage
                                             .getImplementPackageNameList>}) {
                  $pack->{$ipack} ||= true; # not defined
                }
                $pack->{$child-><AG::PerlPackage.packageName>} = []; # defined
              }
            }

            ## -- Exception interface packages
            for (sort {$a cmp $b} @{$self-><M::PerlCode
                                     .getExceptionInterfacePackageNameList>}) {
              next if ref $pack->{$_};
              $pack->{$_} = [];
              $r .= sprintf q<push @%s::ISA, 'Message::Util::Error' >.
                            q<unless @%s::ISA;%s>, $_, $_, "\n";
            }

            ## -- Enables interface packages
            my @packs = map {'$' . $_ . '::'}
                        sort {$a cmp $b}
                        grep {not ref $pack->{$_} and $pack->{$_}}
                        keys %$pack;
            $r .= q<for (>. join (', ', @packs) . qq<){}\n> if @packs;

            ## -- Footer
            $r .= <ClassM::ManakaiPCImplementation.perlComment>
                    (q[License: <].$self-><AG::PerlFile.licenseURI>.qq[>\n]);
            $r .= qq<1;\n>;
          }__;

  @Attr:
    @@Name: currentPackage
    @@enDesc:
      The current Perl package (used in stringify method).

      {NOTE:: This attribute is not preserved by the <Perl::clone> operation.
      }
    @@Type: DOMString
    @@Get:
      @@@disDef:
        @@@@GetProp: currentPackage
    @@Set:
      @@@disDef:
        @@@@SetProp: currentPackage

  @Attr:
    @@Name: currentChunkNumber
    @@enDesc:
      The current code chunk number (used in stringify method). 
  
      {NOTE:: This attribute is not preserved by the <Perl::clone> operation.
      }
    @@Type: idl|unsignedLong||ManakaiDOM|all
    @@Get:
      @@@disDef:
        @@@@GetProp: currentChunk
    @@Set:
      @@@disDef:
        @@@@SetProp: currentChunk

  @Method:
    @@Name: getNextChunkNumber
    @@enDesc:
      Increments the current chunk number of this file 
      and returns it. 
    @@Return:
      @@@Type: idl|unsignedLong||ManakaiDOM|all
      @@@enDesc:
        The next chunk number.
      @@@PerlDef:
        $r = ++$self->{<H::mn:node>}->{<H::pc:currentChunk>};
  
  @ATTR:
    @@Name: licenseURI
    @@ATTRQName: pc|license
    @@enDesc:
      The license term URI reference for this code. 
    @@ReflectCDATA:
    @@Get:
    @@Set:
##PerlFile

PropDef:
  @QName: pc|currentChunk
  @enDesc:
    The current chunk number.

PropDef:
  @QName: pc|currentPackage
  @enDesc:
    The current package fully qualified name.

ElementTypeBinding:
  @Name: ReflectCDATA
  @ElementType:
    dis:Type
  @ShadowContent:
    @@@: DOMString
  @ShadowSibling:
    @@actualType: CDATADOMString

ResourceDef:
  @QName: DOMString
  @For: ManakaiDOM|Perl
  @AliasFor: DOMMain|DOMString||ManakaiDOM|ManakaiDOMLatest

ReflectTypeDef:
  @QName: CDATADOMString
  @enDesc:
    <IF::DOMMain:DOMString> for DOM attributes reflecting
    <SGML::CDATA> element attributes.
  @rdfs:subClassOf: DOMString
  @ResourceDef:
    @@rdf:type: DOMMain|ReflectGet
    @@enDesc:
      The DOM attribute returns the current value of the element attribute
      in a transparent, case-sensitive manner.
      \
      If the element attribute is absent, the default value, if any,
      or an empty string is returned.
    @@PerlCDef:
      my $attr_stem;
      __CODE{DOMCore:selectAttrNodeObjectNS::
        $namespaceURI => $NS_URI_NO_NULL,
        $localName => $LOCAL_NAME,
        $r => $attr_stem,
      }__;
      if ($attr_stem) {
        my $attr;
        __CODE{ManakaiNode:getWeakReference||ManakaiDOM:Perl::
          $object => $attr_stem,
          $ref => $attr,
          $class => {<ClassName::DOMCore:ManakaiDOMAttr>},
        }__;
        __CODE{DOMCore:getNodeTextContent::
          $node => $attr,
          $result => $r,
        }__;
      }
      # else : default : empty string

  @ResourceDef:
    @@QName: CDATADOMStringSet
    @@rdf:type: DOMMain|ReflectSet
    @@enDesc:
      The corresponding element attribute is set to the given value,
      in a transparent, case-sensitive manner.
    @@ImplNote:
      @@@lang:en
      @@@@: 
        What will happen if the <DOM::null> value is given?
    @@PerlCDef:
      if (defined $given) {
        my $prefix;
        __CODE{DOMCore:setAttrValueNS::
          $namespaceURI => $NS_URI_NO_NULL,
          $localName => $LOCAL_NAME,
          $prefix => $prefix,
          $element => $self,
          $value => $given,
        }__;
      } else {
        __DEEP{
          $self-><M::Element.removeAttributeNS> ($NS_URI_NO_NULL, $LOCAL_NAME);
        }__;
      }

ElementTypeBinding:
  @Name: ReflectTypeDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: DISLang|DataType
    @@ForCheck: !ManakaiDOM|IDL
    @@For: ManakaiDOM|DOM

ElementTypeBinding:
  @Name: ATTR
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      @@@@: s|Attribute
      @@@ForCheck: s|ForML
    @@rdf:type:
      @@@@: DISLang|Attribute
      @@@ForCheck: ManakaiDOM|ForClass
    @@rdf:type:
      @@@@: DISLang|Attribute
      @@@ForCheck: ManakaiDOM|ForIF
    @@DocAttr:
      @@@@: ||+||s|ForML
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForClass
    @@DocAttr:
      @@@@: ||+||s|ForML
      @@@ContentType: DISCore|TFPQNames
      @@@ForCheck: ManakaiDOM|ForIF
    @@ForCheck: !=ManakaiDOM|ManakaiDOM

ElementTypeBinding:
  @Name: ATTRQName
  @ElementType:
    dis:AppName
  @ShadowContent:
    @@ForCheck: s|ForML
    @@ContentType: DISCore|QName

IFClsETDef:
  @IFQName: PerlPackage
  @CQName: ManakaiPCPackage
  @ETQName: pc|package

  @IFISA: PerlCode

  @IFISA: PerlCodeStatements
  @CISA: ManakaiPCCodeStatements

  @enDesc:
    A Perl lexical lines for which a <Perl::package> declaration
    in effect. 

  @ATTR:
    @@Name: packageName
    @@ATTRQName: pc|packageName
    @@ReflectCDATA:
    @@enDesc:
      The fully-qualified package name. 
    @@Get: 
    @@Set:

  @Method:
    @@Name: getSub
    @@enDesc:
      Gets a subroutine. 
    @@Param:
      @@@Name: subName
      @@@Type: DOMString
      @@@enDesc:
        The name of subroutine to get. 
    @@NamedParam:
      @@@Name: makeNewNode
      @@@Type: idl|boolean||ManakaiDOM|all
      @@@enDesc:
        Whether a new subroutine object should be created, 
        if it is not exist, or not. 
    @@Return:
      @@@Type: PerlSub
      @@@enDesc:
        The subroutine object. 
      @@@nullCase:
        @@@@enDesc:
          Either the specified subroutine is not found and 
          the <P::makeNewNode> parameter is set to <DOM::false> or
          the subroutine is defined as an alias. 
      @@@PerlDef:
          __DEEP{
            F: {
              for my $child (@{$self-><AG::Node.childNodes>}) {
                if ($child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                    defined $child-><AG::Node.namespaceURI> and
                    $child-><AG::Node.namespaceURI> eq <Q::pc:> and
                    $child-><AG::Node.localName> eq 'sub') {
                  if ($child-><M::PerlSub.hasPerlName> ($subName)) {
                    $r = $child;
                    last F;
                  }
                }
              }
              if ($makeNewNode) {
                $r = $self-><AG::Node.ownerDocument>
                          -><M::Document.createElementNS>
                               (<Q::pc:>, 'sub');
                $r-><M::PerlSub.addPerlName> ($subName);
                $self-><M::Node.appendChild> ($r);
              }
            } # F
          }__;

  @Method:
    @@Name: setSubNode
    @@enDesc:
      Sets a subrotine. 
    @@Param:
      @@@Name: subArg
      @@@Type: PerlSub
      @@@enDesc:
        The subroutine object.
    @@Return:
      @@@RaiseException:
        @@@@@:IN_USE_NODE_ERR
        @@@@enDesc:
          An attempt is made to set a subroutine that is 
          already used elsewhere. 
      @@@PerlDef:
          __DEEP{
            if ($subArg-><AG::Node.parentNode>) {
              __UNDEEP{__EXCEPTION{IN_USE_NODE_ERR::
                pc:childNode => {$subArg},
              }__}__;
            }
            $self-><AG::Node.ownerDocument>-><M::Document.adoptNode> ($subArg);
            $self-><M::Node.appendChild> ($subArg);
          }__;

  @Method:
    @@Name: getOverloadSub
    @@enDesc:
      Gets an overloading subroutine. 
    @@Param:
      @@@Name: opName
      @@@Type:
        DISLang:String::ManakaiDOM:all
      @@@enDesc:
        The name of the overloaded operator. 
    @@NamedParam:
      @@@Name: makeNewNode
      @@@Type:
        DOMMain:boolean::ManakaiDOM:all
      @@@enDesc:
        Whether a new subroutine object should be created, 
        if it is not exist, or not. 
    @@Return:
      @@@Type: PerlSub
      @@@enDesc:
        The subroutine object. 
      @@@nullCase:
        @@@@enDesc:
          Either the specified subroutine is not found and 
          the <P::makeNewNode> parameter is set to <DOM::false> or
          the specified operator is overloaded by specifying method name. 
      @@@UnknownOperatorException:
      @@@PerlDef:
          unless (<Code::operatorNameList>->{$opName}) {
            __EXCEPTION{UNSUPPORTED_OPERATOR_ERR::
              pc:operator => {$opName},
              MDOMX:param-name => 'opName',
            }__;
          }
          __DEEP{
            F: {
              for my $child (@{$self-><AG::Node.childNodes>}) {
                if ($child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                    defined $child-><AG::Node.namespaceURI> and
                    $child-><AG::Node.namespaceURI> eq <Q::pc:> and
                    $child-><AG::Node.localName> eq 'sub') {
                  if ($child-><M::PerlSub.hasPerlOperator> ($opName)) {
                    $r = $child;
                    last F;
                  }
                }
              }
              if ($makeNewNode) {
                $r = $self-><AG::Node.ownerDocument>
                          -><M::Document.createElementNS>
                               (<Q::pc:>, 'sub');
                $r-><M::PerlSub.addPerlOperator> ($opName);
                $self-><M::Node.appendChild> ($r);
              }
            } # F
          }__;

  @Method:
    @@Name: addISAPackage
    @@enDesc:
      Adds a class package that this class inherits. 
    @@Param:
      @@@Name: packageName
      @@@Type: DOMString
      @@@enDesc:
        The name of package to add. 
    @@Return:
      @@@PerlDef:
        __DEEP{
          my $v = $self-><M::Element.getAttributeNS> (<Q::pc:>, 'extends');
          $self-><M::Element.setAttributeNS>
              (<Q::pc:>, 'pc:extends' =>
               join ' ', (split /\s+/, defined $v ? $v : ''), $packageName);
        }__;

  @Method:
    @@Name: getISAPackageNameList
    @@enDesc:
      Returns a list of names of packages extended by the package.
    @@Return:
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        An ordered snapshot list of superpackage names.
      @@@PerlDef:
        __DEEP{
          my $v = $self-><M::Element.getAttributeNS> (<Q::pc:>, 'extends');
          $r = [split /\s+/, defined $v ? $v : ''];
        }__;

  @Method:
    @@Name: addImplementPackage
    @@enDesc:
      Adds a interface package that this class implements. 
    @@Param:
      @@@Name: packageName
      @@@Type: DOMString
      @@@enDesc:
        The name of package to add.
    @@Return:
      @@@PerlDef:
          __DEEP{
            __CODE{addNameListAttr::
              $node => {$self},
              $attrName => 'implements',
              $newName => {$packageName},
            }__;
          }__;

  @Method:
    @@Name: getImplementPackageNameList
    @@enDesc:
      Returns a list of names of packages implemented by the package.
    @@Return:
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        An unordered snapshot list of interface packages.
      @@@PerlDef:
          __DEEP{
            __CODE{getNameListAttr::
              $node => {$self},
              $attrName => 'implements',
              $result => {$r},
            }__;
          }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            my $file = $self-><AG::PerlCode.fileNode>;

            ## Package name
            my $pn = $self-><AG::PerlPackage.packageName>;
            $r .= q<package > . $pn . ";\n";
            $file-><AS::PerlFile.currentPackage> ($pn) if $file;

            ## Package version
            $r .= 'our $VERSION = '.
                <ClassM::ManakaiPCImplementation.versionDateTime> (time).
                ";\n";

            ## Inheritance
            my @isa = (@{$self-><M::PerlPackage.getISAPackageNameList>},
                       sort {$a cmp $b} @{$self-><M::PerlPackage
                                               .getImplementPackageNameList>});
            if (@isa) {
              $r .= 'push our @ISA, ' .
                <ClassM::ManakaiPCImplementation.perlList> (\@isa) .
                ";\n";
            }

            ## |use| Perl Modules
            for my $pack (sort {$a cmp $b} @{$self-><M::PerlCode
                                                 .getUsePerlModuleNameList>}) {
              $r .= 'use ' . $pack . ";\n";
            }

            ## |use| Character Classes
            my $cls = $self-><M::PerlCode.getUseCharClassNameList>;
            for my $pack (sort {$a cmp $b} keys %$cls) {
              $r .= 'use ' . $pack . ' ' .
                <ClassM::ManakaiPCImplementation.perlList>
                   ([sort {$a cmp $b} grep {$cls->{$pack}->{$_}}
                     keys %{$cls->{$pack}}]) . ";\n";
            }

            ## Package-scope objects
            my $has_bool;
            my $op = '';
            for my $child (@{$self-><AG::Node.childNodes>}) {
              if ($child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                  defined $child-><AG::Node.namespaceURI> and
                  $child-><AG::Node.namespaceURI> eq <Q::pc:>) {
                my $ln = $child-><AG::Node.localName>;
                if ($ln eq 'sub') {
                  my $names = $child-><M::PerlSub.getPerlNameList>;
                  my $ops = $child-><M::PerlSub.getPerlOperatorList>;
                  if (@$names) {
                    $r .= $child->stringify;
                    if (@$names > 1) {
                      $r .= sprintf q<*%s = \&%s;%s>,
                                  $_, $names->[0], "\n" for @$names[1..$#$names];
                    }
                    for (@$ops) {
                      $op .= sprintf q['%s' => '%s', %s],
                                     $_ => $names->[0], "\n";
                      $has_bool = true if $_ eq 'bool';
                    }
                  } else {
                    my $v = $child->stringify;
                    for (@$ops) {
                      $op .= sprintf q['%s' => %s, %s], $_ => $v, "\n";
                      $has_bool = true if $_ eq 'bool';
                    }
                  }
                } else {
                  $r .= $child->stringify;
                }
              } elsif ($child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>) {
                $r .= $child;
              }
            } # children 

            if (length $op) {
              $r .= "use overload \n";
              $r .= "bool => sub () {1}, \n" unless $has_bool;
              $r .= $op . "fallback => 1;\n";
            }

            ## -- Exports
            my $xport = $self-><M::PerlPackage.getExportList>;
            if (map {values %$_} values %$xport) {
              $r .= q[our %EXPORT_TAG = (] . 
                    <ClassM::ManakaiPCImplementation.perlList>
                       ([map {$_ => [sort {$a cmp $b} keys %{$xport->{$_}}]}
                         sort {$a cmp $b} grep {length}
                         keys %$xport]) . qq[);\n];
              $r .= q[our @EXPORT_OK = (] .
                    <ClassM::ManakaiPCImplementation.perlList>
                       ([map {sort {$a cmp $b} keys %{$xport->{$_}}}
                         sort {$a cmp $b} keys %$xport]) . qq[);\n];
              $r .= q[use Exporter; push our @ISA, 'Exporter';] . qq[\n];
            }
          }__;

  @Method:
    @@Name: getExportList
    @@enDesc:
      Returns a list of export tag and names.
    @@Return:
      @@@Type: DISPerl|HASH||ManakaiDOM|all
      @@@enDesc:
        Snapshot list of lists.
      @@@PerlDef:
          my $mc;
          __DEEP{
            __CODE{getNameListAttr::
              $node => {$self},
              $attrName => 'export',
              $result => {$mc},
            }__;
          }__;
          for (@$mc) {
            my ($m, $c) = split /\./, $_, 2;
            $r->{$m}->{$c} = true;
          }

  @Method:
    @@Name: addExport
    @@enDesc:
      Adds a name to the list of exported items (<Perl::@EXPORT_OK>).
    @@Param:
      @@@Name: exportTag
      @@@Type: DOMString
      @@@enDesc:
        The name of the tag (without <CHAR::COLON> prefix). 
        The <P::exportName> is added both to <Perl::@EXPORT_OK>
        and <Perl::$EXPORT_OK{<P::exportTag>}>.
      @@@nullCase:
        @@@@enDesc:
          The <P::exportName> is added only to the <Perl::@EXPORT_OK>.
    @@Param:
      @@@Name: exportName
      @@@Type: DOMString
      @@@enDesc:
        The name to be exported.
    @@Return:
      @@@PerlDef:
          __DEEP{
            __CODE{addNameListAttr::
              $node => {$self},
              $attrName => 'export',
              $newName => {$exportTag.'.'.$exportName},
            }__;
          }__;
##PCPackage

ElementTypeBinding:
  @Name: UnknownOperatorException
  @ElementType:
    ManakaiDOM:raises
  @ShadowContent:
    @@@:UNSUPPORTED_OPERATOR_ERR
    @@enDesc:
      An attempt is made to overload an unknown operator. 

XParamDef:
  @QName:
    pc:operator
  @enDesc:
    An operator to overload. 

ResourceDef:
  @For: ManakaiDOM|Perl
  @QName: operatorNameList
  @enDesc:
    The list of valid operators for <PerlModule::operator> pragma. 
  @rdf:type: DISPerl|InlineCode
  @PerlCDef:
    {qw[
                    +  1 -  1 *  1 /  1 %  1 **  1 <<  1 >>  1 x  1 .  1
                    += 1 -= 1 *= 1 /= 1 %= 1 **= 1 <<= 1 >>= 1 x= 1 .= 1
                    <  1 <= 1 >  1 >= 1 == 1 != 1 <=> 1
                    lt 1 le 1 gt 1 ge 1 eq 1 ne 1 cmp 1
                    & 1 | 1 ^ 1 neg 1 ! 1 ~ 1
                    ++ 1 -- 1 = 1
                    atan2 1 cos 1 sin 1 exp 1 abs 1 log 1 sqrt 1
                    bool 1 "" 1 0+ 1 ${} 1 @{} 1 %{} 1 &{} 1 *{} 1 <> 1
                    nomethod 1
    ]}

IFClsETDef:
  @IFQName: PerlCodeStatements
  @CQName: ManakaiPCCodeStatements
  @ETQName:
    @@@: pc|statementContainer
    @@ImplNote:
      @@@lang:en
      @@@@: Dummy.

  @IFISA: PerlCodeUnits
  @CISA: ManakaiPCCodeUnits

  @enDesc:
    A base class for node types that contains zero or more
    statements and/or blocks.

  @ATTR:
    @@Name: sourceFile
    @@ATTRQName: pc|sourceFile
    @@enDesc:
      The source file name of this fragment. 
    @@ReflectCDATA:
    @@Get:
      @@@enDesc:
        Any string identifying the source. 
      @@@nullCase:
        @@@@enDesc: No source file name is set. 
    @@Set:
      @@@nullCase:
        @@@@enDesc: No (or unknown) source file. 

  @ATTR:
    @@Name: sourceLine
    @@ATTRQName: pc|sourceLine
    @@enDesc:
      Source file line number of the first line of this fragment. 
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ATTR:
    @@Name: currentSourceFile
    @@ATTRQName: pc|currentSourceFile
    @@enDesc:
      The current source file name that is referred when 
      a code fragment is added. 
    @@ReflectCDATA:
    @@Get:
      @@@nullCase:
        @@@@enDesc: No source file name is set. 
    @@Set:
      @@@nullCase:
        @@@@enDesc: No (or unknown) source file. 

  @ATTR:
    @@Name: currentSourceLine
    @@ATTRQName: pc|currentSourceLine
    @@enDesc:
      The current line number in source file that is referred when 
      a code fragment is added. 
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @Method:
    @@Name: appendCodeFragment
    @@enDesc:
      Appends a <Class::ManakaiPerlCodeFragment> object. 
    @@Param:
      @@@Name: codeArg
      @@@Type: PerlCode
      @@@enDesc:
        A code fragment object. 
    @@Return:
      @@@RaiseException:
        @@@@@:BAD_CHILD_ERR
        @@@@enDesc:
          An attempt is made to append a child
          that is not a <Class::ManakaiPerlUnparsedCode>.
      @@@RaiseException:
        @@@@@:IN_USE_NODE_ERR
        @@@@enDesc:
          An attempt is made to append a node that is 
          already used elsewhere. 
      @@@PerlDef:
          if ({
            unparsed => 1, if => 1, statement => 1, block => 1,
            choose => true,
            blockContainer => true,
            inlineUnparsed => 1, variable => 1, tokens => 1, atom => 1,
            inlineContainer => 1, stringLiteral => 1, assignment => 1,
            list => true, arrayRefLiteral => true, hashRefLiteral => true,
          }->{$codeArg-><AG::Node.localName>}) {
            if ($codeArg-><AG::Node.parentNode>) {
              __EXCEPTION{IN_USE_NODE_ERR::
                pc:childNode => {$codeArg},
                MDOMX:param-name => 'codeArg',
              }__;
            }
            __DEEP{
              $self-><AG::Node.ownerDocument>
                   -><M::Document.adoptNode> ($codeArg);
              $self-><M::Node.appendChild> ($codeArg);
            }__;
          } else {
            __EXCEPTION{BAD_CHILD_ERR::
              pc:parentNode => {$self},
              pc:childNode => {$codeArg},
              MDOMX:param-name => 'codeArg',
            }__;
          }

  @Method:
    @@Name: appendCode
    @@enDesc:
      Appends an unparsed Perl code fragment. 
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        An unparsed Perl code fragment. 
    @@Return:
      @@@Type: PerlUnparsedCode
      @@@enDesc:
        The newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                      (<Q::pc:>, 'unparsed');
            $r-><AS::Node.textContent> ($codeArg);
            $r-><AS::PerlCodeStatements.sourceFile>
               ($self-><AG::PerlCodeStatements.currentSourceFile>);
            my $sl = $self-><AG::PerlCodeStatements.currentSourceLine>;
            $r-><AS::PerlCodeStatements.sourceLine> ($sl);
            $self-><AG::PerlCodeStatements.currentSourceLine>
                      ($sl + ($codeArg =~ tr/\x0A/\x0A/));
            $self-><M::Node.appendChild> ($r);
          }__;

  @Method:
    @@Name: skipLines
    @@enDesc:
      Skips lines in a code. 
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        A code fragment, which is counted lines. 
    @@Return:
      @@@PerlDef:
        __DEEP{
          $self-><AS::PerlCodeStatements.currentSourceLine>
                   ($self-><AG::PerlCodeStatements.currentSourceLine>
                        + ($codeArg =~ tr/\x0A/\x0A/));
        }__;

  @ATTR:
    @@Name: label
    @@ATTRQName: pc|label
    @@enDesc:
      Label for this block.
    @@ReflectCDATA:
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          No label.
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          No label.

  @Method:
    @@Name: appendBlock
    @@enDesc:
      Appends a Perl block code.
    @@Return:
      @@@Type: PerlBlock
      @@@enDesc:
        The newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                         (<Q::pc:>, 'block');
            $self-><M::Node.appendChild> ($r);
          }__;

  @Method:
    @@Name: appendStatement
    @@enDesc:
      Appends a Perl statement.
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        A Perl statement without terminating <Perl::;>.
      @@@nullCase:
        @@@@enDesc:
          No initial content.
    @@Return:
      @@@Type: PerlStatement
      @@@enDesc:
        The newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                         (<Q::pc:>, 'statement');
            if (defined $codeArg) {
              $r-><M::PerlCodeUnits.appendBare> ($codeArg);
            }
            $self-><M::Node.appendChild> ($r);
          }__;

  @Method:
    @@Name: appendNewPCBlock
    @@enDesc:
      Creates a <Q::pc2:block> and appends it to the node.
    @@Return:
      @@@Type: PCBlock
      @@@enDesc:
        The newly created block element.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>-><M::PCDocument.createPCBlock>;
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewPCChoose
    @@enDesc:
      Creates a <Q::pc:choose> and appends it to the node.
    @@Return:
      @@@Type: PCChoose
      @@@enDesc:
        The newly created choose element.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>-><M::PCDocument.createPCChoose>;
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewPCWhile
    @@enDesc:
      Creates a <Q::pc:while> and appends it to the node.
    @@Return:
      @@@Type: PCWhile
      @@@enDesc:
        The newly created while element.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>-><M::PCDocument.createPCWhile>;
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewIf
    @@enDesc:
      Appends a newly created <Class::ManakaiPerlIf> object. 
    @@Param:
      @@@Name: conditionArg
      @@@Type: PerlCode
      @@@enDesc:
        Conditoon code fragment object.
    @@Param:
      @@@Name: trueArg
      @@@Type: PerlCode
      @@@enDesc:
        A true code fragment object. 
      @@@nullCase:
        @@@@enDesc: No true code.
    @@Param:
      @@@Name: falseArg
      @@@Type: PerlCode
      @@@enDesc:
        A false code fragment object. 
      @@@nullCase:
        @@@@enDesc: No false code.
    @@Return:
      @@@Type: PerlIf
      @@@enDesc:
        The newly created element.
      @@@RaiseException:
        @@@@@:BAD_CHILD_ERR
        @@@@enDesc:
          An attempt is made to append a child
          that is not valid type.
      @@@RaiseException:
        @@@@@:IN_USE_NODE_ERR
        @@@@enDesc:
          An attempt is made to append a node that is 
          already used elsewhere. 
      @@@PerlDef:
          for my $arg ([conditionArg => $conditionArg]) {
            if ({
              atom => 1, tokens => 1, inlineContainer => 1, assignment => true,
              inlineUnparsed => 1, variable => 1, stringLiteral => true,
              list => true, arrayRefLiteral => true, hashRefLiteral => true,
            }->{$arg->[1]-><AG::Node.localName>}) {
              if ($arg->[1]-><AG::Node.parentNode>) {
                __EXCEPTION{IN_USE_NODE_ERR::
                  pc:childNode => {$arg->[1]},
                  MDOMX:param-name => {$arg->[0]},
                }__;
              }
            } else {
              __EXCEPTION{BAD_CHILD_ERR::
                pc:parentNode => {$self},
                pc:childNode => {$arg->[1]},
                MDOMX:param-name => {$arg->[0]},
              }__;
            }
          } # c

          for my $arg ([trueArg => $trueArg],
                       [falseArg => $falseArg]) {
            next unless $arg->[1];
            if ({
                  blockContainer => true,
                }->{$arg->[1]-><AG::Node.localName>}) {
              if ($arg->[1]-><AG::Node.parentNode>) {
                __EXCEPTION{IN_USE_NODE_ERR::
                  pc:childNode => {$arg->[1]},
                  MDOMX:param-name => {$arg->[0]},
                }__;
              }
            } else {
              __EXCEPTION{BAD_CHILD_ERR::
                pc:parentNode => {$self},
                pc:childNode => {$arg->[1]},
                MDOMX:param-name => {$arg->[0]},
              }__;
            }
          } # t/f

          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                   (<Q::pc:>, 'if');
            $r-><AS::PerlIf.condition> ($conditionArg);
            $r-><AS::PerlIf.trueCode> ($trueArg) if $trueArg;
            $r-><AS::PerlIf.falseCode> ($falseArg) if $falseArg;
            $self-><M::Node.appendChild> ($r);
          }__;
##PCIf

IFClsETDef:
  @IFQName: PerlSub
  @CQName: ManakaiPCSub
  @ETQName: pc|sub

  @IFISA: PerlCode

  @IFISA: PerlCodeStatements
  @CISA: ManakaiPCCodeStatements

  @enDesc:
    Perl subroutines.   

  @Attr:
    @@Name: pcLocalName
    @@enDesc:
      The name of this subroutine. 
    @@Type: DOMString
    @@Get: 
      @@@nullCase:
        @@@@enDesc:
          This subroutine has no name. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::PerlSub.getPerlNameList>->[0];
          }__;

  @Method:
    @@Name: addPerlName
    @@enDesc:
      Adds a subroutine name.
    @@Param:
      @@@Name: subName
      @@@Type: DOMString
      @@@enDesc: The name to add.
    @@Return:
      @@@PerlDef:
        __DEEP{
          __CODE{addNameListAttr::
            $node => {$self},
            $attrName => 'localName',
            $newName => {$subName},
          }__;
        }__;

  @Method:
    @@Name: getPerlNameList
    @@enDesc:
      Returns a list of names of the subroutine.
    @@Return:
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        An unordered snapshot list of names.
      @@@PerlDef:
        __DEEP{
          __CODE{getNameListAttr::
            $node => {$self},
            $attrName => 'localName',
            $result => {$r},
          }__;
        }__;

  @Method:
    @@Name: hasPerlName
    @@enDesc:
      Returns whether the subroutine has a name or not.
    @@Param:
      @@@Name: subName
      @@@Type: DOMString
      @@@enDesc: The name.
    @@Return:
      @@@Type: idl|boolean||ManakaiDOM|all
      @@@PerlDef:
        __DEEP{
          my $l;
          __CODE{getNameListAttr::
            $node => {$self},
            $attrName => 'localName',
            $result => {$l},
          }__;
          F: for (@$l) {
            if ($_ eq $subName) {
              $r = true;
              last F;
            }
          }
        }__;

  @Method:
    @@Name: clearPerlName
    @@enDesc:
      Removes all Perl name associated to the <IF::PerlSub>.
    @@Return:
      @@@PerlDef:
        __DEEP{
          $self-><M::Element.removeAttributeNS> (<Q::pc:>, 'localName');
        }__;

  @Method:
    @@Name: addPerlOperator
    @@enDesc:
      Adds an operator overloaded by the method.
    @@Param:
      @@@Name: op
      @@@Type: DOMString
      @@@enDesc: The operator to add.
    @@Return:
      @@@PerlDef:
        __DEEP{
          __CODE{addNameListAttr::
            $node => {$self},
            $attrName => 'operator',
            $newName => {$op},
          }__;
        }__;

  @Method:
    @@Name: getPerlOperatorList
    @@enDesc:
      Returns a list of operators of the subroutine.
    @@Return:
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        An unordered snapshot list of operators.
      @@@PerlDef:
        __DEEP{
          __CODE{getNameListAttr::
            $node => {$self},
            $attrName => 'operator',
            $result => {$r},
          }__;
        }__;

  @Method:
    @@Name: hasPerlOperator
    @@enDesc:
      Returns whether the subroutine has an operator or not.
    @@Param:
      @@@Name: op
      @@@Type: DOMString
      @@@enDesc: The operator.
    @@Return:
      @@@Type: idl|boolean||ManakaiDOM|all
      @@@PerlDef:
        __DEEP{
          my $l;
          __CODE{getNameListAttr::
            $node => {$self},
            $attrName => 'operator',
            $result => {$l},
          }__;
          F: for (@$l) {
            if ($_ eq $op) {
              $r = true;
              last F;
            }
          }
        }__;

  @ATTR:
    @@Name: prototype
    @@ATTRQName: pc|prototype
    @@enDesc:
      The prototype of this subroutine. 
    @@ReflectCDATA:
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          No prototype is set. 
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          No prototype declaration. 

    @@Test:
      @@@QName: PCSub.prototype.empty.test
      @@@enDesc:
        Getting value after setting empty value must return an empty string.
      @@@PerlDef:
        my $impl = <Class::ManakaiPCImplementation>->_new;
        my $sub = $impl-><M::PCImplementation.createPerlSub> ("sub_name");
        $test->assert_not_null ($sub);
        
        $sub-><AS::PerlSub.prototype> ('');
        $test->assert_string (actual_value => $sub-><AG::PerlSub.prototype>,
                              expected_value => '');
        $test->assert_true ($sub->stringify =~ /^sub sub_name \(\)/);
  
  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            $r = q<sub>;
            my $nm = $self-><M::PerlSub.getPerlNameList>;
            $r .= q< > . $nm->[0] if @$nm;
            if ($self-><M::Element.hasAttributeNS> (<Q::pc:>, 'prototype')) {
              $r .= q< (> . $self-><AG::PerlSub.prototype> . q<)>;
            }
            $r .= qq< {\n>;
            for my $child (@{$self-><AG::Node.childNodes>}) {
              $r .= $child->stringify;
            }
            $r .= qq<}\n>;
          }__;

  @NumValMethod:
    @@Return:
      @@@Type: idl|unsignedLong||ManakaiDOM|all
      @@@PerlDef:
          __DEEP{
            $r = 0 + $self-><AG::Node.lastChild>;
          }__;
##PerlSub

ElementTypeBinding:
  @Name: Test
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: test|StandaloneTest
    @@ForCheck: ManakaiDOM|ForClass

XParamDef:
  @QName: parentNode
  @enDesc:
    Parent node. 

XParamDef:
  @QName: childNode
  @enDesc:
    Child node. 

IFClsETDef:
  @IFQName: PerlUnparsedCode
  @CQName: ManakaiPCUnparsedCode
  @ETQName: pc|unparsed

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    Unparsed Perl code fragments. 

  @ATTR:
    @@Name: sourceFile
    @@ATTRQName: pc|sourceFile
    @@enDesc:
      The source file name of this fragment. 
    @@ReflectCDATA:
    @@Get:
      @@@enDesc:
        Any string identifying the source. 
      @@@nullCase:
        @@@@enDesc: No source file name is set. 
    @@Set:
      @@@nullCase:
        @@@@enDesc: No (or unknown) source file. 

  @ATTR:
    @@Name: sourceLine
    @@ATTRQName: pc|sourceLine
    @@enDesc:
      Source file line number of the first line of this fragment. 
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            $r = "\x0A" . $self-><AG::Node.textContent> . "\x0A";
            my $file = $self-><AG::PerlCode.fileNode>;
            my $src_file = $file ? $file-><AG::PerlFile.sourceFile>
                                 : $self->{<H::mn:node>}->{<H::mn:nodeID>};
            if ($self-><AG::Node.ownerDocument>
                     -><AG::Document.domConfig>
                     -><M::DOMCore:DOMConfiguration.getParameter>
                          (<Q::pc:line>)) {
              my $nxt_cnum = $file ? $file-><M::PerlFile.getNextChunkNumber> : 0;
              $r = sprintf qq<\n#line %d "%s [u] (Chunk #%d)"%s>.
                           qq<#line 1 "%s [/u] (Chunk #%d)"\n>,
                         $self-><AG::PerlUnparsedCode.sourceLine> || 1,
                         $self-><AG::PerlUnparsedCode.sourceFile> || $src_file,
                         $file ? $file-><M::PerlFile.getNextChunkNumber> : 0,
                         $r,
                         $src_file,
                         $file ? $file-><M::PerlFile.getNextChunkNumber> : 0;
            }
          }__;
##PerlUnparsedCode

IFClsETDef:
  @IFQName: PerlInlineUnparsedCode
  @CQName: ManakaiPCInlineUnparsedCode
  @ETQName: pc|inlineUnparsed

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    Unparsed Perl inline code fragments.   

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code.
      @@@disDef:
        @@@@DISPerl:cloneCode: DOMCore|ManakaiDOMNode.textContent.get
##PCInlineUnparsedCode

IFClsETDef:
  @IFQName: PCNumberLiteral
  @CQName: ManakaiPCNumberLiteral
  @ETQName: pc|numberLiteral
 
  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    A <IF::PCNumberLiteral> object represents a Perl number literal.
    The <A::Node.textContent> of a <IF::PCNumberLiteral> object
    is a Perl source code representation of the number for the object.

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.textContent>;
        }__;
##PCNumberLiteral

IFClsETDef:
  @IFQName: PerlStringLiteral
  @CQName: ManakaiPCPerlStringLiteral
  @ETQName: pc|stringLiteral

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    Perl string literal.  

  @NumValMethod:
    @@Return:
      @@@Type: idl|unsignedLong||ManakaiDOM|all
      @@@enDesc:
        Numeric value of the Perl code. 
      @@@PerlDef:
          __DEEP{
            $r = 0 + $self-><AG::Node.textContent>;
          }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.textContent>;
            $r =~ s/(['\\])/\\$1/g;
            $r = q<'> . $r . q<'>;
          }__;
##PerlStringLiteral

IFClsETDef:
  @IFQName: PCList
  @CQName: ManakaiPCList
  @ETQName: pc|list

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    A <IF::PCList> is a Perl list, i.e. <CHAR::COMMA> separated
    list of values.

  @Method:
    @@Name: item
    @@enDesc:
      Returns the <P::index>th item in the list.
    @@Param:
      @@@Name: index
      @@@Type: unsignedLong
      @@@enDesc:
        The ordinal index of the item.
    @@Return:
      @@@Type: PerlCodeInlines
      @@@enDesc:
        The <P::index>th item in the list.
      @@@nullCase:
        @@@@enDesc:
          Either <P::index> is negative or the <P::index> is 
          greater than the number of the items in the list.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.childNodes>-><M::NodeList.item> ($index);
        }__;

  @Attr:
    @@Name: length
    @@enDesc:
      The number of items in the list.
    @@Type: unsignedLong
    @@Get:
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.childNodes>-><AG::NodeList.length>;
        }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
        __DEEP{
          my @r = map {$_->stringify} @{$self-><AG::Node.childNodes>};
          $r = '(' . join (', ', @r) . ')';
        }__;
##PCList

IFClsETDef:
  @IFQName: PCArrayRefLiteral
  @CQName: ManakaiPCArrayRefLiteral
  @ETQName: pc|arrayRefLiteral

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    A <IF::PCArrayRefLiteral> is a Perl array reference literal.

  @Method:
    @@Name: item
    @@enDesc:
      Returns the <P::index>th item in the list.
    @@Param:
      @@@Name: index
      @@@Type: unsignedLong
      @@@enDesc:
        The ordinal index of the item.
    @@Return:
      @@@Type: PerlCodeInlines
      @@@enDesc:
        The <P::index>th item in the list.
      @@@nullCase:
        @@@@enDesc:
          Either <P::index> is negative or the <P::index> is 
          greater than the number of the items in the list.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.childNodes>-><M::NodeList.item> ($index);
        }__;

  @Attr:
    @@Name: length
    @@enDesc:
      The number of items in the list.
    @@Type: unsignedLong
    @@Get:
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.childNodes>-><AG::NodeList.length>;
        }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
        __DEEP{
          my @r = map {$_->stringify} @{$self-><AG::Node.childNodes>};
          $r = '[' . join (', ', @r) . ']';
        }__;
##PCArrayRefLiteral

IFClsETDef:
  @IFQName: PCHashRefLiteral
  @CQName: ManakaiPCHashRefLiteral
  @ETQName: pc|hashRefLiteral

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    A <IF::PCHashRefLiteral> is a Perl hash reference literal.

  @Method:
    @@Name: key
    @@enDesc:
      Returns the <P::index>th key in the list.

        {NOTE:: Although the order of key-value pairs is
                preserved in the object, it is not preserved
                in Perl source codes and in Perl language.
        }
    @@Param:
      @@@Name: index
      @@@Type: unsignedLong
      @@@enDesc:
        The ordinal index of the key.
    @@Return:
      @@@Type: PerlCodeInlines
      @@@enDesc:
        The <P::index>th key in the list.
      @@@nullCase:
        @@@@enDesc:
          Either <P::index> is negative or the <P::index> is 
          greater than the number of the keys in the list.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.childNodes>-><M::NodeList.item> ($index * 2);
        }__;

  @Method:
    @@Name: value
    @@enDesc:
      Returns the <P::index>th value in the list.

        {NOTE:: Although the order of key-value pairs is
                preserved in the object, it is not preserved
                in Perl source codes and in Perl language.
        }
    @@Param:
      @@@Name: index
      @@@Type: unsignedLong
      @@@enDesc:
        The ordinal index of the value.
    @@Return:
      @@@Type: PerlCodeInlines
      @@@enDesc:
        The <P::index>th value in the list.
      @@@nullCase:
        @@@@enDesc:
          Either <P::index> is negative or the <P::index> is 
          greater than the number of the values in the list.

            {NOTE:: <MATH::<A::PCHashRefLiteral.length> - 1>th
                    value might not be found.
            }
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.childNodes>-><M::NodeList.item> ($index * 2 + 1);
        }__;

  @Attr:
    @@Name: length
    @@enDesc:
      The number of key-value pairs in the list.
    @@Type: unsignedLong
    @@Get:
      @@@PerlDef:
        __DEEP{
          my $length = $self-><AG::Node.childNodes>-><AG::NodeList.length>;
          $r = int ($length / 2) + ($length % 2);
        }__;

  @Method:
    @@Name: setNamedItem
    @@enDesc:
      Set a named item.
    @@Param:
      @@@Name: key
      @@@Type: DOMString
      @@@enDesc:
        The key.
    @@Param:
      @@@Name: value
      @@@Type: PerlCodeInlines
      @@@enDesc:
        The value.
    @@Return:
      @@@PerlDef:
        __DEEP{
          my @children = @{$self-><AG::Node.childNodes>};
          R: {
            while (@children) {
              my $ckey = shift @children;
              my $cval = shift @children;
              if ($ckey-><AG::Node.textContent> eq $key) {
                $self-><M::Node.replaceChild> ($value, $cval);
                last R;
              }
            }

            $self-><M::Node.appendChild>
              ($self-><AG::Node.ownerDocument>
                    -><M::Document.createElementNS>
                        (<Q::pc:>, 'stringLiteral'))
                 -><AS::Node.textContent> ($key);
            $self-><M::Node.appendChild> ($value);
          } # R
        }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
        __DEEP{
          my %r = map {$_->stringify} @{$self-><AG::Node.childNodes>};
                  ## Different values with same key are not preserved.
          $r = '{' . join (', ', map {$_ => $r{$_}}
                                 sort {$a cmp $b} keys %r) . '}';
        }__;
##PCHashRefLiteral

ResourceDef:
  @QName: unsignedLong
  @AliasFor: idl|unsignedLong||ManakaiDOM|all
  @For: ManakaiDOM|DOM

IFClsETDef:
  @IFQName: PerlTokens
  @CQName: ManakaiPCTokens
  @ETQName: pc|tokens

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    Unparsed Perl inline code fragments.   

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.textContent>;
          }__;
##PCTokens

IFClsETDef:
  @IFQName: PerlAtom
  @CQName: ManakaiPCAtom
  @ETQName: pc|atom

  @IFISA: PerlCode
  @CISA: ManakaiPCTokens

  @enDesc:
    Unparsed Perl atomic code fragments (such as numeric literal). 
  
  @NumValMethod:
    @@Return:
      @@@Type: idl|unsignedLong||ManakaiDOM|all
      @@@enDesc:
        Numeric value of the Perl code. 
      @@@PerlDef:
          __DEEP{
            $r = 0 + $self-><AG::Node.textContent>;
          }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.textContent>;
          }__;
##PerlAtom

IFClsETDef:
  @IFQName: PerlVariable
  @CQName: ManakaiPCVariable
  @ETQName: pc|variable

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    Unparsed Perl variable. 
    \
    {NOTE:: Future version of the implementation may 
            support to specify array index or hash key.
     \
    }  

  @ATTR:
    @@Name: variableType
    @@ATTRQName: pc|variableType
    @@enDesc:
      Perl variable type (<CODE::$>, <CODE::@>, <CODE::%>,
      <CODE::&> or empty string). 
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ATTR:
    @@Name: packageName
    @@ATTRQName: pc|packageName
    @@enDesc:
      The name of the package to which this variable belongs.
    @@ReflectCDATA:
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          This package belongs to the current package or 
          does not belong to any package.
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          This package belongs to the current package or
          does not belong to any package.

  @ATTR:
    @@Name: pcLocalName
    @@ATTRQName: pc|localName
    @@enDesc:
      The local variable name.
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ATTR:
    @@Name: variableScope
    @@ATTRQName: pc|variableScope
    @@enDesc:
      Scope modifier (<CODE::my> or <CODE::our> or <CODE::local>).
    @@ReflectCDATA:
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          This variable does not have scope modifier.
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          This variable does not have scope modifier.

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            my $t = $self-><AG::PerlVariable.variableScope>;
            $r .= $t . ' ' if length $t;
            $r .= $self-><AG::PerlVariable.variableType>;
            my $v = $self-><AG::PerlVariable.packageName>;
            $r .= $v . '::' if length $v;
            $r .= $self-><AG::PerlVariable.pcLocalName>;
            $v = $self-><AG::PerlVariable.hashKey>;
            if ($t eq '$' and length $v) {
              $v =~ s/(['\\])/\\$1/g;
              $r .= q<{'> . $v . q<'}>;
            }
          }__;

  @ATTR:
    @@Name: hashKey
    @@ATTRQName: pc|hashKey
    @@enDesc:
      The key for hash. 
      \
      {NOTE:: Using Perl code for key is not supported in the current
              version of the implementation.
      \
      }
    @@ReflectCDATA:
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          This variable is not for hash value access.
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          This variable is not for hash value access.
##PerlVariable

IFClsDef:
  @IFQName: PerlCodeUnits
  @CQName: ManakaiPCCodeUnits

  @CISA: ManakaiPCCode

  @enDesc:
    A base class implemented by both inline container and
    block-level container.
  
  @Attr:
    @@Name: length
    @@enDesc:
      The number of child code fragments. 
    @@Type: idl|unsignedLong||ManakaiDOM|all
    @@Get:
      @@@PerlDef:
          __DEEP{
            $r = @{$self-><AG::Node.childNodes>};
          }__;

  @Method:
    @@Name: appendStringLiteral
    @@enDesc:
      Appends a Perl string literal (<CODE::q>).
    @@Param:
      @@@Name: stringArg
      @@@Type: DOMString
      @@@enDesc:
        A string.
    @@Return:
      @@@Type: PerlStringLiteral
      @@@enDesc:
        The newly created Perl string literal object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                           (<Q::pc:>, 'stringLiteral');
            $r-><AS::Node.textContent> ($stringArg);
            $self-><M::Node.appendChild> ($r);
          }__;

  @Method:
    @@Name: appendNewPCLiteral
    @@enDesc:
      Creates a <IF::PCLiteral> object and appends it to the node.
    @@Param:
      @@@Name: value
      @@@Type: DISPerl|Any
      @@@enDesc: The value.
    @@Return:
      @@@Type: PerlCode
      @@@enDesc:
        The newly created object.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>
                    -><M::PCDocument.createPCLiteral> ($value);
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewPCNumberLiteral
    @@enDesc:
      Creates a <IF::PCNumberLiteral> object and appends it to the node.
    @@Param:
      @@@Name: value
      @@@Type: DISPerl|NumberValue
      @@@enDesc:
        The value.
    @@Return:
      @@@Type: PCNumberLiteral
      @@@enDesc:
        The newly created node.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>
                    -><M::PCDocument.createPCNumberLiteral> ($value);
          $self-><M::Node.appendChild> ($r);
        }__; 

  @Method:
    @@Name: appendAtom
    @@enDesc:
      Appends a Perl atomic code fragment.
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        An atom.
    @@Return:
      @@@Type: PerlAtom
      @@@enDesc:
        The newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                   (<Q::pc:>, 'atom');
            $r-><AS::Node.textContent> ($codeArg);
            $self-><M::Node.appendChild> ($r);
          }__;

  @Method:
    @@Name: appendBare
    @@enDesc:
      Appends a Perl bare code fragment.
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        An bare code.
    @@Return:
      @@@Type: PerlBare
      @@@enDesc:
        The newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                   (<Q::pc:>, 'tokens');
            $r-><AS::Node.textContent> ($codeArg);
            $self-><M::Node.appendChild> ($r);
          }__;

  @Method:
    @@Name: appendNewPCVariable
    @@enDesc:
      Creates a variable object and appends it to the children list of 
      the node.
    @@Param:
      @@@Name: variableTypeArg
      @@@Type: DOMString
      @@@enDesc:
        The variable type prefix such as <Perl::$>, if any, or an empty string.
    @@Param:
      @@@Name: packageNameArg
      @@@Type: DOMString
      @@@enDesc:
        The name of the package to which the variable belongs.
      @@@nullCase:
        @@@@enDesc:
          The variable does not belong to any package or belongs
          to the current package.
    @@Param:
      @@@Name: localNameArg
      @@@Type: DOMString
      @@@enDesc:
        The local part of the variable name.
    @@Return:
      @@@Type: PerlVariable
      @@@enDesc:
        The newly created variable object.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>
                    -><M::PCDocument.createPCVariable>
                        ($variableTypeArg, $packageNameArg, $localNameArg);
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewPCDereference
    @@enDesc:
      Creates a <IF::PCDereference> object and appends it to the child
      node list of the node.
    @@Param:
      @@@Name: variableTypeArg
      @@@Type: DOMString
      @@@enDesc:
        The type of the referenced value, such as <Perl::$>.
    @@Return:
      @@@Type: PCDereference
      @@@enDesc:
        The newly created element node.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>
                    -><M::PCDocument.createPCDereference>
                        ($variableTypeArg);
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewPCReference
    @@enDesc:
      Creates a <IF::PCReference> object and appends it to the child
      node list of the node.
    @@Return:
      @@@Type: PCReference
      @@@enDesc:
        The newly created element node.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>
                    -><M::PCDocument.createPCReference>;
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewPCExpression
    @@enDesc:
      Appends a newly created <IF::PCExpression> node.
    @@Param:
      @@@Name: operatorArg
      @@@Type: DOMString
      @@@enDesc:
        The operator of the expression.
    @@Return:
      @@@Type: PCExpression
      @@@enDesc:
        The newly created expression object.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>
                    -><M::PCDocument.createPCExpression> ($operatorArg);
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewAssignment
    @@enDesc:
      Appends a newly created <Class::ManakaiPerlAssign> object. 
    @@Param:
      @@@Name: leftArg
      @@@Type: PerlCode
      @@@enDesc:
        A left hand side code fragment object. 
    @@Param:
      @@@Name: rightArg
      @@@Type: PerlCode
      @@@enDesc:
        A right hand side code fragment object. 
    @@Return:
      @@@Type: PerlAssignment
      @@@RaiseException:
        @@@@@:BAD_CHILD_ERR
        @@@@enDesc:
          An attempt is made to append a child
          that is not valid type.
      @@@RaiseException:
        @@@@@:IN_USE_NODE_ERR
        @@@@enDesc:
          An attempt is made to append a node that is 
          already used elsewhere. 
      @@@PerlDef:
          for my $arg ([leftArg => $leftArg], [rightArg => $rightArg]) {
            if ({
              atom => 1, tokens => 1, inlineContainer => 1, assignment => true,
              inlineUnparsed => 1, variable => 1, stringLiteral => true,
              list => true, arrayRefLiteral => true, hashRefLiteral => true,
            }->{$arg->[1]-><AG::Node.localName>}) {
              if ($arg->[1]-><AG::Node.parentNode>) {
                __EXCEPTION{IN_USE_NODE_ERR::
                  pc:childNode => {$arg->[1]},
                  MDOMX:param-name => {$arg->[0]},
                }__;
              }
            } else {
              __EXCEPTION{BAD_CHILD_ERR::
                pc:parentNode => {$self},
                pc:childNode => {$arg->[1]},
                MDOMX:param-name => {$arg->[0]},
              }__;
            }
          } # left/right

          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                (<Q::pc:>, 'assignment');
            $r-><AS::PerlAssignment.leftCode> ($leftArg);
            $r-><AS::PerlAssignment.rightCode> ($rightArg);
            $self-><M::Node.appendChild> ($r);
          }__;

  @Method:
    @@Name: appendNewPCApply
    @@enDesc:
      Creates a <IF::PCApply> object and appends it to the children list
      of the node.
    @@Return:
      @@@Type: PCApply
      @@@enDesc: The newly created node.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>-><M::PCDocument.createPCApply>;
          $self-><M::Node.appendChild> ($r);
        }__;

  @Method:
    @@Name: appendNewPCFunctionCall
    @@enDesc:
      Appends a newly created <IF::PCFunctionCall> node.
    @@Param:
      @@@Name: packageArg
      @@@Type: DOMString
      @@@enDesc:
        The package name of the function.
      @@@nullCase:
        @@@@enDesc: No package name.
    @@Param:
      @@@Name: localNameArg
      @@@Type: DOMString
      @@@enDesc:
        The local part of the function name.
    @@Return:
      @@@Type: PCFunctionCall
      @@@enDesc:
        The newly created functin call object.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::Node.ownerDocument>
                    -><M::PCDocument.createPCFunctionCall>
                        ($packageArg, $localNameArg);
          $self-><M::Node.appendChild> ($r);
        }__;
##PCCodeUnits

IFClsETDef:
  @IFQName: PerlStatement
  @CQName: ManakaiPCStatement
  @ETQName: pc|statement

  @IFISA: PerlCode
  @IFISA: PerlCodeInlines
  @CISA: ManakaiPCCodeInlines

  @enDesc:
    Perl statements.   

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
        $r = $self->SUPER::stringify;
        $r .= ";\n" if length $r;
##PerlStatement

IFClsETDef:
  @IFQName: PerlCodeInlines
  @CQName: ManakaiPCCodeInlines
  @ETQName: pc|inlineContainer

  @CISA: ManakaiPCCodeUnits

  @enDesc:
    Perl inline code block.   

  @Method:
    @@Name: appendCodeFragment
    @@enDesc:
      Appends a <IF::PerlCode> object. 
    @@Param:
      @@@Name: codeArg
      @@@Type: PerlCode
      @@@enDesc:
        A code fragment object. 
    @@Return:
      @@@RaiseException:
        @@@@@:BAD_CHILD_ERR
        @@@@enDesc:
          An attempt is made to append a child
          that is not a <Class::ManakaiPerlUnparsedCode>.
      @@@RaiseException:
        @@@@@:IN_USE_NODE_ERR
        @@@@enDesc:
          An attempt is made to append a node that is 
          already used elsewhere. 
      @@@PerlDef:
          if ({
            atom => 1, tokens => 1, inlineContainer => 1, assignment => true,
            inlineUnparsed => 1, variable => 1, stringLiteral => true,
            list => true, arrayRefLiteral => true, hashRefLiteral => true,
          }->{$codeArg-><AG::Node.localName>}) {
            if ($codeArg-><AG::Node.parentNode>) {
              __EXCEPTION{IN_USE_NODE_ERR::
                pc:childNode => {$codeArg},
              }__;
            }
            __DEEP{
              $self-><AG::Node.ownerDocument>
                   -><M::Document.adoptNode> ($codeArg);
              $self-><M::Node.appendChild> ($codeArg);
            }__;
          } else {
            __EXCEPTION{BAD_CHILD_ERR::
              pc:parentNode => {$self},
              pc:childNode => {$codeArg},
            }__;
          }

  @Method:
    @@Name: appendCode
    @@enDesc:
      Appends an unparsed Perl code fragment. 
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        An unparsed Perl code fragment. 
    @@Return:
      @@@Type: PerlInlineUnparsedCode
      @@@enDesc:
        The newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::Node.ownerDocument>-><M::Document.createElementNS>
                                                (<Q::pc:>, 'inlineUnparsed');
            $r-><AS::Node.textContent> ($codeArg);
            $self-><M::Node.appendChild> ($r);
          }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            my @child = @{$self-><AG::Node.childNodes>};
            for my $child (@child) {
              if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                  $child-><AG::Node.localName> eq 'inlineContainer' and
                  1 == @child) {
                $r .= '(' . $child->stringify . ')';
              } else {
                $r .= $child->stringify;
              }
            }
          }__;
##PCCodeInlines

IFClsETDef:
  @IFQName: PerlBlock
  @CQName: ManakaiPerlBlock
  @ETQName: pc|block

  @IFISA: PerlCode
  @IFISA: PerlCodeStatements
  @CISA: ManakaiPCCodeStatements

  @enDesc:
    Perl block-level code block.   

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
        __DEEP{        
          my @child = @{$self-><AG::Node.childNodes>};
          my $label = $self-><AG::PerlCodeStatements.label>;
          if (not $label and @child == 1 and 
              $child[0]-><AG::Node.localName> eq 'block') {
            $r = "\x0A" . $child[0]->stringify . "\x0A";
          } elsif (not $label and @child == 1 and
                   $child[0]-><AG::Node.localName> eq 'unparsed' and
                   $child[0]-><AG::Node.textContent> =~ /^\s*$/) {
            # 
          } else {
            $r = "\x0A";
            for my $child (@child) {
              if ($child-><AG::Node.localName> eq 'inlineContainer' and
                  1 == @child) {
                $r .= '(' . $child->stringify . ')';
              } else {
                $r .= $child->stringify;
              }
            }
            $r .= "\x0A";

              if ($self-><AG::Node.ownerDocument>
                       -><AG::Document.domConfig>
                       -><M::DOMCore:DOMConfiguration.getParameter>
                            (<Q::pc:line>)) {
                my $file = $self-><AG::PerlCode.fileNode>;
                my $sfile = $file ? $file-><AG::PerlFile.sourceFile>
                                  : $self->{<H::mn:node>}->{<H::mn:nodeID>};
                $r = sprintf qq<\n{\n#line %d "%s [b] (Chunk #%d)"%s>.
                             qq<#line 1 "%s [/b] (Chunk #%d)"\n;}\n>,
                           $self-><AG::PerlCodeStatements.sourceLine> || 1,
                           $self-><AG::PerlCodeStatements.sourceFile> || $sfile,
                           $file ? $file-><M::PerlFile.getNextChunkNumber> : 0,
                           $r,
                           $sfile,
                           $file ? $file-><M::PerlFile.getNextChunkNumber> : 0
                  if 2 < length $r;
              } else {
                $r = "\n{\n$r\n;}\n" if 2 < length $r;
              }

              $r = "\n" . $label . ':' . $r if $label;
            }
          }__;
##PerlBlock

IFClsETDef:
  @IFQName: PerlCodeBlocks
  @CQName: ManakaiPCCodeBlocks
  @ETQName: pc|blockContainer

  @IFISA: PerlCodeStatements
  @CISA: ManakaiPCCodeStatements

  @enDesc:
    Perl block-level code container whose content may or may
    not semantically be self-contained. 
  
  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          my @child = @{$self-><AG::Node.childNodes>};
          if (@child == 1 and 
              {
                block => true, blockContainer => true,
              }->{$child[0]-><AG::Node.localName>}) {
            $r = $child[0]->stringify;
          } else {
            for my $child (@child) {
              if ($child-><AG::Node.localName> eq 'inlineContainer' and
                  1 == @child) {
                $r .= '(' . $child->stringify . ')';
              } else {
                $r .= $child->stringify;
              }
            }

            __DEEP{
              if ($self-><AG::Node.ownerDocument>
                       -><AG::Document.domConfig>
                       -><M::DOMCore:DOMConfiguration.getParameter>
                            (<Q::pc:line>)) {
                my $file = $self-><AG::PerlCode.fileNode>;
                my $sfile = $file ? $file-><AG::PerlFile.sourceFile>
                                  : $self->{<H::mn:node>}->{<H::mn:nodeID>};
                $r = sprintf qq<\n#line %d "%s [bc] (Chunk #%d)"\n%s>.
                             qq<\n#line 1 "%s [/bc] (Chunk #%d)"\n>,
                           $self-><AG::PerlCodeStatements.sourceLine> || 1,
                           $self-><AG::PerlCodeStatements.sourceFile> || $sfile,
                           $file ? $file-><M::PerlFile.getNextChunkNumber> : 0,
                           $r,
                           $sfile,
                           $file ? $file-><M::PerlFile.getNextChunkNumber> : 0;
              }
            }__;
          }
##PCCodeBlocks

IFClsETDef:
  @IFQName: PCDereference
  @CQName: ManakaiPCDereference
  @ETQName: pc|dereference
  
  @IFISA: PerlCode
  @IFISA: PerlCodeInlines
  @CISA: ManakaiPCCodeInlines

  @enDesc:
    A <IF::PCDereference> object represents a dereference.

  @ATTR:
    @@Name: variableType
    @@ATTRQName: pc|variableType
    @@enDesc:
      The type of the value, such as <Perl::$>.
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::PCDereference.variableType> . '{';
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            $r .= $child;
          }
          $r .= '}';
        }__;
##PCDereference

IFClsETDef:
  @IFQName: PCReference
  @CQName: ManakaiPCReference
  @ETQName: pc|reference
  
  @IFISA: PerlCode
  @IFISA: PerlCodeInlines
  @CISA: ManakaiPCCodeInlines

  @enDesc:
    A <IF::PCReference> object represents a reference (<Perl::\>) operation.

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          $r = '\(undef)';
          no warnings 'uninitialized';
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> ==
                          <C::Node.ELEMENT_NODE>;
            $r = $child;
            unless ({
              <Q::pc:variable> => true,
            }->{$child-><AG::Node.namespaceURI>.
                $child-><AG::Node.localName>}) {
              $r = '('.$r.')';
            }
            last A;
          }
        }__;
##PCReference

IFClsETDef:
  @IFQName: PCApply
  @CQName: ManakaiPCApply
  @ETQName: pc|apply

  @IFISA: PerlCode
  @IFISA: PerlCodeInlines
  @CISA: ManakaiPCCodeInlines

  @enDesc:
    A <IF::PCApply> object represents a function call.

    The first child element must be an expression results in a function name
    (such as bare function or operator name represented
    as a <IF::PCVariable> object or an <IF::PCExpression> with
    operator <Perl::-<gt>> whose last operand is a method name.
    
    The second child element, if any, is an expression intended to be
    an argument for the function.  It is possible to specify more than
    one arguments by <IF::PCExpression> with operator <Perl::,>.

    The third child element, if any, is an expression that is put
    into the indirect object slot.

  @Attr:
    @@Name: function
    @@enDesc:
      The function child element of the element.
    @@Type: PerlCode
    @@Get:
      @@@nullCase:
        @@@@enDesc: There is no child element.
      @@@PerlDef:
        __DEEP{
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            $r = $child;
            last A;
          }
        }__;

  @Attr:
    @@Name: argument
    @@enDesc:
      The argument child element of the element.
    @@Type: PerlCode
    @@Get:
      @@@nullCase:
        @@@@enDesc: There is no argument element.
      @@@PerlDef:
        __DEEP{
          my $x;
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            if ($x) {
              $r = $child;
              last A;
            } else {
              $x = true;
            }
          }
        }__;

  @Attr:
    @@Name: indirect
    @@enDesc:
      The indirect object slot child element of the element.
    @@Type: PerlCode
    @@Get:
      @@@nullCase:
        @@@@enDesc: There is no indirect object element.
      @@@PerlDef:
        __DEEP{
          my $x = 0;
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            if ($x++ == 2) {
              $r = $child;
              last A;
            }
          }
        }__;


  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          my $f;
          my $arg;
          my $obj;
          no warnings 'uninitialized';
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            if (not defined $f) {
              $f = ''.$child;
            } elsif (not defined $arg) {
              $arg = ''.$child;
            } else {
              $obj = ''.$child;
              last A;
            }
          }

          $r = $f;
          $r .= ' ' . $obj if defined $obj;

          if ({
                'die' => true,
                'last' => true,
                'next' => true,
                'redo' => true,
                'return' => true,
                'warn' => true,
              }->{$r}) {
            $r .= ' ' . $arg;
          } else {
            $r .= ' (' . $arg . ')';
          }
        }__;
##PCApply

IFClsETDef:
  @IFQName: PCExpression
  @CQName: ManakaiPCExpression
  @ETQName: pc|expression

  @IFISA: PerlCode
  @IFISA: PerlCodeInlines
  @CISA: ManakaiPCCodeInlines

  @enDesc:
    A <IF::PCExpression> object represents a sequence of one or more
    expression fragments (operands) separated by the same operator.

  @ATTR:
    @@Name: operator
    @@ATTRQName: pc|operator
    @@enDesc:
      The operator.
    @@ReflectCDATA:
    @@Get:
    @@Set:
 
  @Attr:
    @@Name: operandNumber
    @@enDesc:
      The number of operands.
    @@Type: idl|unsignedLong||ManakaiDOM|all
    @@Get:
      @@@PerlDef:
        __DEEP{
          $r = @{$self-><AG::Node.childNodes>};
        }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          my @r;
          no warnings 'uninitialized';
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            my $xuri = $child-><AG::Node.namespaceURI>
                     . $child-><AG::Node.localName>;
            push @r, [$child.'', $child, $xuri];
          }
          if (@r > 1) {
            my $op = $self-><AG::PCExpression.operator>;
            for (@r) {
              if ($_->[2] ne <Q::pc:expression> and not {
                <Q::pc:apply> => true,
                <Q::pc:arrayRefLiteral> => true,
                <Q::pc:atom> => true,
                <Q::pc:dereference> => true,
                <Q::pc:hashRefLiteral> => true,
                <Q::pc:numberLiteral> => true,
                <Q::pc:stringLiteral> => true,
                <Q::pc:tokens> => true,
                <Q::pc:variable> => true,
              }->{$_->[2]}) {
                $_ = '(' . $_->[0] . ')';
              } elsif ($_->[2] eq <Q::pc:expression> and
              (not {
                '**'  => {'->' => true},
                '=~'  => {'->' => true},
                '!~'  => {'->' => true},
                '*'   => {'->' => true, '*' => true},
                '/'   => {'->' => true},
                '%'   => {'->' => true},
                'x'   => {'->' => true},
                '+'   => {'->' => true, '*' => true, '+' => true, '-' => true},
                '-'   => {'->' => true, '*' => true},
                '.'   => {'->' => true},
                '<'   => {'->' => true},
                '>'   => {'->' => true},
                '<='  => {'->' => true},
                '>='  => {'->' => true},
                'lt'  => {'->' => true},
                'gt'  => {'->' => true},
                'le'  => {'->' => true},
                'gr'  => {'->' => true},
                '=='  => {'->' => true},
                '!='  => {'->' => true},
                '<=>' => {'->' => true},
                'eq'  => {'->' => true},
                'ne'  => {'->' => true},
                'cmp' => {'->' => true},
                '&&'  => {'->' => true, '&&' => true},
                '||'  => {'->' => true, '||' => true},
                '..'  => {'->' => true},
                '='   => {'->' => true},
                ','   => {'->' => true, ',' => true, '=>' => true},
                '=>'  => {'->' => true, ',' => true, '=>' => true},
                'and' => {'->' => true, 'and' => true},
                'or'  => {'->' => true, 'or' => true},
              }->{$op}->{$_->[1]-><AG::PCExpression.operator>}) and
              $_->[1]-><AG::PCExpression.operandNumber> > 1) {
                $_ = '(' . $_->[0] . ')';
              } else {
                $_ = $_->[0];
              }
            }
            $op = ' '.$op unless {
              ',' => true,
              '->' => true,
              '..' => true,
              '...' => true,
            }->{$op};
            $op = $op.' ' unless {
              '->' => true,
              '..' => true,
              '...' => true,
            }->{$op};
            $r = join $op, @r;
          } elsif (@r) {
            $r = $r[0]->[0];
          } elsif ($self-><AG::PCExpression.operator> eq ',') {
            $r = '()';
          } else {
            $r = 'undef';
          }
        }__;
##PCExpression

IFClsETDef:
  @IFQName: PerlAssignment
  @CQName: ManakaiPCAssignment
  @ETQName: pc|assignment

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    Perl variable assignment.  

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><AG::PerlAssignment.leftCode>->stringify
               . ' = '
               . $self-><AG::PerlAssignment.rightCode>->stringify;
          }__;

  @Attr:
    @@Name: leftCode
    @@enDesc:
      Left-hand expression.
    @@Type: PerlCodeInlines
    @@Get:
      @@@nullCase:
        @@@@enDesc: Left-hand code not yet specified.
      @@@PerlDef:
        __DEEP{
          F: for my $child (@{$self-><AG::Node.childNodes>}) {
            if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                $child-><AG::Node.localName> eq 'left') {
              $r = $child-><AG::Node.lastChild>;
              last F;
            }
          }
        }__;
    @@Set:
      @@@PerlDef:
        __DEEP{
          $self-><AG::Node.ownerDocument>-><M::Document.adoptNode> ($given);
          F: {
            for my $child (@{$self-><AG::Node.childNodes>}) {
              if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                  $child-><AG::Node.localName> eq 'left') {
                $child-><AS::Node.textContent> ('');
                $child-><M::Node.appendChild> ($given);
                last F;
              }
            }
            my $node = $self-><AG::Node.ownerDocument>
                            -><M::Document.createElementNS>
                                   (<Q::pc:>, 'left');
            $node-><M::Node.appendChild> ($given);
            $self-><M::Node.appendChild> ($node);
          }
        }__;

  @Attr:
    @@Name: rightCode
    @@enDesc:
      Right-hand expression.
    @@Type: PerlCodeInlines
    @@Get:
      @@@nullCase:
        @@@@enDesc: Right-hand code not yet specified.
      @@@PerlDef:
        __DEEP{
          F: for my $child (@{$self-><AG::Node.childNodes>}) {
            if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                $child-><AG::Node.localName> eq 'right') {
              $r = $child-><AG::Node.lastChild>;
              last F;
            }
          }
        }__;
    @@Set:
      @@@PerlDef:
        __DEEP{
          $self-><AG::Node.ownerDocument>-><M::Document.adoptNode> ($given);
          F: {
            for my $child (@{$self-><AG::Node.childNodes>}) {
              if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                  $child-><AG::Node.localName> eq 'right') {
                $child-><AS::Node.textContent> ('');
                $child-><M::Node.appendChild> ($given);
                last F;
              }
            }
            my $node = $self-><AG::Node.ownerDocument>
                            -><M::Document.createElementNS>
                                   (<Q::pc:>, 'right');
            $node-><M::Node.appendChild> ($given);
            $self-><M::Node.appendChild> ($node);
          }
        }__;
##PerlAssignment

IFClsETDef:
  @IFQName: PCCondition
  @CQName: ManakaiPCCondition
  @ETQName: pc2|condition

  @IFISA: PerlCode
  @IFISA: PerlCodeInlines
  @CISA: ManakaiPCCodeInlines

  @enDesc:
    A <IF::PCCondition> object represents a condition expression
    part of an <Perl::if> or <Perl::while> statement.

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            $r .= $child;
          }
        }__;
##PCCondition

IFClsETDef:
  @IFQName: PCBlock
  @CQName: ManakaiPCBlock
  @ETQName: pc2|block

  @IFISA: PerlCode
  @IFISA: PerlCodeStatements
  @CISA: ManakaiPCCodeStatements

  @enDesc:
    A <Q::PCBlock> object represents a Perl code block, i.e. 
    a set of statements enclosed by <CHAR::{> and <CHAR::}> pair.

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{        
          my @child = @{$self-><AG::Node.childNodes>};
          my $label = $self-><AG::PerlCodeStatements.label>;

            $r = "\x0A";
            for my $child (@child) {
              if ($child-><AG::Node.localName> eq 'inlineContainer' and
                  1 == @child) {
                $r .= '(' . $child->stringify . ')';
              } else {
                $r .= $child->stringify;
              }
            }
            $r .= "\x0A";
            $r .= ';' unless @child;

              if ($self-><AG::Node.ownerDocument>
                       -><AG::Document.domConfig>
                       -><M::DOMCore:DOMConfiguration.getParameter>
                            (<Q::pc:line>)) {
                my $file = $self-><AG::PerlCode.fileNode>;
                my $sfile = $file ? $file-><AG::PerlFile.sourceFile>
                                  : $self->{<H::mn:node>}->{<H::mn:nodeID>};
                $r = sprintf qq<\n{\n#line %d "%s [b] (Chunk #%d)"%s>.
                             qq<#line 1 "%s [/b] (Chunk #%d)"\n}\n>,
                           $self-><AG::PerlCodeStatements.sourceLine> || 1,
                           $self-><AG::PerlCodeStatements.sourceFile> || $sfile,
                           $file ? $file-><M::PerlFile.getNextChunkNumber> : 0,
                           $r,
                           $sfile,
                           $file ? $file-><M::PerlFile.getNextChunkNumber> : 0;
              } else {
                $r = "\n{\n$r\n}\n";
              }

              $r = "\n" . $label . ':' . $r . '# ' . $label . "\n"
                if length $label;

          }__;
##PCBlock

IFClsETDef:
  @IFQName: PCWhile
  @CQName: ManakaiPCWhile
  @ETQName: pc|while
  
  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    A <IF::PCWhile> object represents a <Perl::while> statement.
    It can contain two child elements: <Q::pc2|condition> and <Q::pc2|block>,
    each represents the condition expression and the block of the <Perl::while>
    statement.

  @ATTR:
    @@Name: label
    @@ATTRQName: pc|label
    @@enDesc:
      Label for this block.
    @@ReflectCDATA:
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          No label.
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          No label.

  @Attr:
    @@Name: condition
    @@enDesc:
      The condition object.
    @@Type: PCCondition
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          There is no condition element.
      @@@PerlDef:
        __CODE{getChildElementByType::
          $namespaceURI => {<Q::pc2:>},
          $localName => {'condition'},
          $parent => $self,
          $result => $r,
        }__;

  @Attr:
    @@Name: block
    @@enDesc:
      The code block that is executed while the <A::PCWhile.condition> met.
    @@Type: PCBlock
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          There is no <Q::pc2:block> child element.
      @@@PerlDef:
        __CODE{getChildElementByType::
          $namespaceURI => {<Q::pc2:>},
          $localName => {'block'},
          $parent => $self,
          $result => $r,
        }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          $r = 'while (';
          my $cond = $self-><AG::PCWhile.condition>;
          if ($cond) {
            $r .= $cond->stringify;
          } else {
            $r .= '0';
          }
          $r .= ') ';
          my $block = $self-><AG::PCWhile.block>;
          if ($block) {
            $r .= $block->stringify;
          } else {
            $r .= "{ }\n";
          }

          my $label = $self-><AG::PCWhile.label>;
          $r = "\n" . $label . ': ' . $r . ' # ' . $label . "\n"
            if length $label;
        }__;
##PCWhile

IFClsETDef:
  @IFQName: PCChoose
  @CQName: ManakaiPCChoose
  @ETQName: pc|choose

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    A <IF::PCChoose> object, or a <Q::pc|choose> element, represents
    a set of <Perl::if>, <Perl::elsif>, and <Perl::else> statements.

  @Method:
    @@Name: getWhen
    @@enDesc:
      Returns a <IF::PCWhen> by its ordinal index.
    @@Param:
      @@@Name: index
      @@@Type: idl|unsignedLong||ManakaiDOM|all
      @@@enDesc:
        The ordinal index of the <Q::pc|when> element.
    @@Return:
      @@@Type: PCWhen
      @@@enDesc:
        The <P::index>th <Q::pc|when> object.
      @@@nullCase:
        @@@@enDesc:
          There is no <P::index>th element.
      @@@PerlDef:
        __DEEP{
          my $i = 0;
          no warnings 'uninitialized';
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            if ($child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
                $child-><AG::Node.namespaceURI> eq <Q::pc:> and
                $child-><AG::Node.localName> eq 'when' and
                ++$i == $index) {
              $r = $child;
              last A;
            }
          }
        }__;

  @Method:
    @@Name: appendNewPCWhen
    @@enDesc:
      Appends a new <Q::pc|when> element.
    @@Return:
      @@@Type: PCWhen
      @@@enDesc:
        The newly created <Q::pc|when> element.
      @@@PerlDef:
        __DEEP{
          my $od = $self-><AG::Node.ownerDocument>;
          $r = $od-><M::Document.createElementNS> (<Q::pc:>, 'when');
          my $cond = $od-><M::Document.createElementNS>
                              (<Q::pc2:>, 'condition');
          $r-><M::Node.appendChild> ($cond);
          my $block = $od-><M::Document.createElementNS>
                              (<Q::pc2:>, 'block');
          $r-><M::Node.appendChild> ($block);
          $self-><M::Node.insertBefore> ($r, $self-><AG::PCChoose.otherwise>);
        }__;

  @Attr:
    @@Name: otherwise
    @@enDesc:
      Returns the <IF::PCOtherwise> by its ordinal index.
    @@Type: PCOtherwise
    @@Get:
      @@@enDesc:
        The <Q::pc|otherwise> object.
      @@@nullCase:
        @@@@enDesc:
          There is no <Q::pc|otherwise> element.
      @@@PerlDef:
        __CODE{getChildElementByType::
          $namespaceURI => {<Q::pc:>},
          $localName => {'otherwise'},
          $parent => $self,
          $result => $r,
        }__;

  @Method:
    @@Name: appendNewPCOtherwise
    @@enDesc:
      Appends a new <Q::pc|otherwise> element.  If there is already the
      <Q::pc|otherwise> element, then no element is created and
      the element is returned.
    @@Return:
      @@@Type: PCOtherwise
      @@@enDesc:
        The <Q::pc|otherwise> element.
      @@@PerlDef:
        __DEEP{
          $r = $self-><AG::PCChoose.otherwise>;
          unless ($r) {
            my $od = $self-><AG::Node.ownerDocument>;
            $r = $od-><M::Document.createElementNS> (<Q::pc:>, 'otherwise');
            my $block = $od-><M::Document.createElementNS>
                              (<Q::pc2:>, 'block');
            $r-><M::Node.appendChild> ($block);
            $self-><M::Node.appendChild> ($r);
          }
        }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          S: for my $child (@{$self-><AG::Node.childNodes>}) {
            next S unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            next S unless $child-><AG::Node.namespaceURI> eq <Q::pc:>;
            my $ln = $child-><AG::Node.localName>;
            if ($ln eq 'when') {
              $r .= 'els' if length $r;
              $r .= $child->stringify;
            } elsif ($ln eq 'otherwise') {
              $r .= $child->stringify;
              last S;
            }
          } # S
        }__;
##PCChoose

IFClsETDef:
  @IFQName: PCWhen
  @CQName: ManakaiPCWhen
  @ETQName: pc|when
  
  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    A <IF::PCWhen> object, or a <Q::pc|when> element, represents an
    <Perl::if> or <Perl::elsif> block.

  @Attr:
    @@Name: condition
    @@enDesc:
      The condition object.
    @@Type: PCCondition
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          There is no condition element.
      @@@PerlDef:
        __CODE{getChildElementByType::
          $namespaceURI => {<Q::pc2:>},
          $localName => {'condition'},
          $parent => $self,
          $result => $r,
        }__;

  @Attr:
    @@Name: block
    @@enDesc:
      The code block that is executed when the <A::PCWhen.condition> met.
    @@Type: PCBlock
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          There is no <Q::pc2:block> child element.
      @@@PerlDef:
        __CODE{getChildElementByType::
          $namespaceURI => {<Q::pc2:>},
          $localName => {'block'},
          $parent => $self,
          $result => $r,
        }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          $r = 'if (';
          my $cond = $self-><AG::PCWhen.condition>;
          if ($cond) {
            $r .= $cond->stringify;
          } else {
            $r .= '0';
          }
          $r .= ') ';
          my $block = $self-><AG::PCWhen.block>;
          if ($block) {
            $r .= $block->stringify;
          } else {
            $r .= "{ }\n";
          }
        }__;
##PCWhen

IFClsETDef:
  @IFQName: PCOtherwise
  @CQName: ManakaiPCOtherwise
  @ETQName: pc|otherwise
  
  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    A <IF::PCOtherwise> object, or a <Q::pc|otherwise> element, represents an
    <Perl::else> clause.

  @Attr:
    @@Name: block
    @@enDesc:
      The code block that is executed.
    @@Type: PCBlock
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          There is no <Q::pc2:block> child element.
      @@@PerlDef:
        __CODE{getChildElementByType::
          $namespaceURI => {<Q::pc2:>},
          $localName => {'block'},
          $parent => $self,
          $result => $r,
        }__;

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          my $block = $self-><AG::PCOtherwise.block>;
          if ($block) {
            $r = 'else ' . $block->stringify;
          }
        }__;
##PCOtherwise

ResourceDef:
  @For: ManakaiDOM|ManakaiDOM
  @QName: getChildElementByType
  @rdf:type: DISPerl|BlockCode
  @enDesc:
    Returns the first element of a type.
  @PerlCDef:
    __DEEP{
      no warnings 'uninitialized';
      A: for my $__child (@{$parent-><AG::Node.childNodes>}) {
        if ($__child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE> and
            $__child-><AG::Node.namespaceURI> eq $namespaceURI and
            $__child-><AG::Node.localName> eq $localName) {
          $result = $__child;
          last A;
        }
      }
    }__;

IFClsETDef:
  @IFQName: PerlIf
  @CQName: ManakaiPCIf
  @ETQName: pc|if

  @IFISA: PerlCode
  @CISA: ManakaiPCCode

  @enDesc:
    Perl variable assignment.

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        Perl code. 
      @@@PerlDef:
          __DEEP{
            my $tcode = $self-><AG::PerlIf.trueCode>;
            my $fcode = $self-><AG::PerlIf.falseCode>;
            my $ccode = $self-><AG::PerlIf.condition>;
            if (defined $tcode) {
              if (defined $fcode) {
                $r = q<if (> . $ccode->stringify . q<) {> . $tcode->stringify .
                     q<} else {> . $fcode->stringify . qq<}\n>;
              } else {
                $r = q<if (> . $ccode->stringify . q<) {> . $tcode->stringify .
                     qq<}\n>;
              }
            } else {
              $r = q<unless (> . $ccode->stringify . q<) {> . $fcode->stringify .
                   qq<}\n>;
            }
          }__;

  @Attr:
    @@Name: condition
    @@enDesc:
      Condition expression.
    @@Type: PerlCodeInlines
    @@Get:
      @@@nullCase:
        @@@@enDesc: Condition code not yet specified.
      @@@PerlDef:
        __DEEP{
          F: for my $child (@{$self-><AG::Node.childNodes>}) {
            if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                $child-><AG::Node.localName> eq 'condition') {
              $r = $child-><AG::Node.lastChild>;
              last F;
            }
          }
        }__;
    @@Set:
      @@@PerlDef:
        __DEEP{
          $self-><AG::Node.ownerDocument>-><M::Document.adoptNode> ($given);
          F: {
            for my $child (@{$self-><AG::Node.childNodes>}) {
              if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                  $child-><AG::Node.localName> eq 'condition') {
                $child-><AS::Node.textContent> ('');
                $child-><M::Node.appendChild> ($given);
                last F;
              }
            }
            my $node = $self-><AG::Node.ownerDocument>
                            -><M::Document.createElementNS>
                                   (<Q::pc:>, 'condition');
            $node-><M::Node.appendChild> ($given);
            $self-><M::Node.appendChild> ($node);
          }
        }__;

  @Attr:
    @@Name: trueCode
    @@enDesc:
      True-case code.
    @@Type: PerlCodeBlocks
    @@Get:
      @@@nullCase:
        @@@@enDesc: True-case code not yet specified.
      @@@PerlDef:
        __DEEP{
          F: for my $child (@{$self-><AG::Node.childNodes>}) {
            if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                $child-><AG::Node.localName> eq 'tr'.'ue') {
              $r = $child-><AG::Node.lastChild>;
              last F;
            }
          }
        }__;
    @@Set:
      @@@PerlDef:
        __DEEP{
          $self-><AG::Node.ownerDocument>-><M::Document.adoptNode> ($given);
          F: {
            for my $child (@{$self-><AG::Node.childNodes>}) {
              if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                  $child-><AG::Node.localName> eq 'tr'.'ue') {
                $child-><AS::Node.textContent> ('');
                $child-><M::Node.appendChild> ($given);
                last F;
              }
            }
            my $node = $self-><AG::Node.ownerDocument>
                            -><M::Document.createElementNS>
                                   (<Q::pc:>, 'tr'.'ue');
            $node-><M::Node.appendChild> ($given);
            $self-><M::Node.appendChild> ($node);
          }
        }__;

  @Attr:
    @@Name: falseCode
    @@enDesc:
      False-case code.
    @@Type: PerlCodeBlocks
    @@Get:
      @@@nullCase:
        @@@@enDesc: True-case code not yet specified.
      @@@PerlDef:
        __DEEP{
          F: for my $child (@{$self-><AG::Node.childNodes>}) {
            if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                $child-><AG::Node.localName> eq 'fal'.'se') {
              $r = $child-><AG::Node.lastChild>;
              last F;
            }
          }
        }__;
    @@Set:
      @@@PerlDef:
        __DEEP{
          $self-><AG::Node.ownerDocument>-><M::Document.adoptNode> ($given);
          F: {
            for my $child (@{$self-><AG::Node.childNodes>}) {
              if ($child-><AG::Node.namespaceURI> eq <Q::pc:> and
                  $child-><AG::Node.localName> eq 'fal'.'se') {
                $child-><AS::Node.textContent> ('');
                $child-><M::Node.appendChild> ($given);
                last F;
              }
            }
            my $node = $self-><AG::Node.ownerDocument>
                            -><M::Document.createElementNS>
                                   (<Q::pc:>, 'fal'.'se');
            $node-><M::Node.appendChild> ($given);
            $self-><M::Node.appendChild> ($node);
          }
        }__;
##PerlIf

PropDef:
  @QName:condition
  @enDesc:
    Condition.
PropDef:
  @QName:true
  @enDesc:
    If true.
PropDef:
  @QName:false
  @enDesc:
    If false.

PropDef:
  @QName:left
  @FullName:
    @@lang:en
    @@@: Left hand side
PropDef:
  @QName:right
  @FullName:
    @@lang:en
    @@@: Right hand side

PropDef:
  @QName:label
  @enDesc:
    Perl statement / block label.


IFClsETDef:
  @IFQName: PCFunctionCall
  @CQName: ManakaiPCFunctionCall
  @ETQName: pc|call

  @IFISA: PerlCode
  @IFISA: PerlCodeInlines
  @CISA: ManakaiPCCodeInlines

  @enDesc:
    A <IF::PCFunctionCall> object represents a function call or
    function-like statement such as <Perl::next>.

  @ATTR:
    @@Name: variableType
    @@ATTRQName: pc|variableType
    @@enDesc:
      The value of the attribute <kwd:MAY> be <Perl::&>,
      which introduces a subroutine name.
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ATTR:
    @@Name: packageName
    @@ATTRQName: pc|packageName
    @@enDesc:
      The name of the package to which the subroutine belongs.
    @@ReflectCDATA:
    @@Get:
      @@@nullCase:
        @@@@enDesc:
          The object belongs to the current package or 
          does not belong to any package.
    @@Set:
      @@@nullCase:
        @@@@enDesc:
          The object belongs to the current package or
          does not belong to any package.

  @ATTR:
    @@Name: pcLocalName
    @@ATTRQName: pc|localName
    @@enDesc:
      The local part of the subroutine name.
    @@ReflectCDATA:
    @@Get:
    @@Set:

  @ToStringMethod:
    @@Return:
      @@@Type: DOMString
      @@@PerlDef:
        __DEEP{
          $r .= $self-><AG::PCFunctionCall.variableType>;
          my $v = $self-><AG::PCFunctionCall.packageName>;
          $r .= $v . '::' if length $v;
          $r .= $self-><AG::PCFunctionCall.pcLocalName>;

          my @arg;
          no warnings 'uninitialized';
          A: for my $child (@{$self-><AG::Node.childNodes>}) {
            next A unless $child-><AG::Node.nodeType> == <C::Node.ELEMENT_NODE>;
            push @arg, ''.$child;
          }
          my $arg = join ', ', @arg;
          if ({
                'die' => true,
                'last' => true,
                'next' => true,
                'redo' => true,
                'return' => true,
                'warn' => true,
              }->{$r}) {
            $r .= ' ' . $arg;
          } else {
            $r .= ' (' . $arg . ')';
          }
        }__;
##PCFunctionCall

ElementTypeBinding:
  @Name: RaiseException
  @ElementType:
    dx:raises

## -- Configuration Parameters

boolCParam:
  @QName: pc|line
  @nodeProp: pcline
  @IsSupportRequired:1
  @DOMCore:targetType: DOMCore|Document
  @TrueCase:
    @@DOMCore:isSupported:1
    @@enDesc:
      Inserts <Perl::#line> directives.
  @FalseCase:
    @@DOMCore:isSupported:1
    @@IsSupportRequired:1
    @@IsDefault:1
      Does not insert any <Perl::#line> directive.

CParam:
  @QName: pc|split-resolver
  @nodeProp: pcsres
  @IsSupportRequired:1
  @DOMCore:targetType: DOMCore|Document
  @Type: DISPerl|CODE||ManakaiDOM|all
  @enDesc:
    Splits module file.  The parameter value <kwd:MUST> be
    a Perl code reference.  The serializer would invoke
    the code with arguments: a reserved parameter, a <IF::PerlFile>
    whose serialization is being split, and a string
    that identifies the split part.  The code is expected
    to return a <IF::DOMLS:LSOutput> object to which the module part
    is written.  Note that splitting serialized module file
    does not affect to the <IF::PerlFile> tree.
  @nullCase:
    @@enDesc:
      Does not split module file.

ElementTypeBinding:
  @Name: nodeProp
  @ElementType:
    DOMCore:nodeProp
  @ShadowContent:
    @@For: =ManakaiDOM|all

ElementTypeBinding:
  @Name: CParam
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      @@@@: DOMCore|DOMConfigurationParameter
      @@@For: ManakaiDOM|DOM
    @@rdf:type:
      @@@@: DISCore|Property
      @@@For: =ManakaiDOM|all
    @@For: ManakaiDOM|DOM3
    @@For: =ManakaiDOM|all

ElementTypeBinding:
  @Name: boolCParam
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      @@@@: DOMCore|DOMConfigurationParameter
      @@@For: ManakaiDOM|DOM
    @@rdf:type:
      @@@@: DISCore|Property
      @@@For: =ManakaiDOM|all
    @@For: ManakaiDOM|DOM3
    @@For: =ManakaiDOM|all
    @@Type: idl|boolean||ManakaiDOM|all

## -- PCDocument

IFClsDef:
  @IFQName: PCDocument
  @CQName: ManakaiPCDocument

  @IFISA: Document
  @CISA: DOMCore|ManakaiDOMDocument

  @enDesc:
    A <IF::PCDocument> is a <IF::Document> that represents a Perl code.

  @s:rootElementType: pc|file

  @Method:
    @@Name: createPCLiteral
    @@enDesc:
      Creates a literal object.

        {NOTE:: If a member of <P::value> is a <IF::PerlCode> object,
                then it is appended to the tree as is, except when
                the object comes from different document than the
                document, in which case the object is being adopted
                to the document by <M::Document.adoptNode> method.
                If that method fails, then the result is undefined.
        }
    @@Param:
      @@@Name: value
      @@@Type: DISPerl|Any
      @@@enDesc:
        The value.
      @@@InCase:
        @@@@Type: DISPerl|StringValue
        @@@@enDesc:
          A <IF::PerlStringLiteral> whose value is <P::value> is created.
      @@@InCase:
        @@@@Type: DISPerl|ARRAY
        @@@@enDesc:
          A <IF::PCArrayRefLiteral> is created.  If <P::value>
          has items, then objects are recursively created.
      @@@InCase:
        @@@@Type: DISPerl|HASH
        @@@@enDesc:
          A <IF::PCHashRefLiteral> is created.  If <P::value>
          has key-value pairs, then objects are recursively created.
    @@Return:
      @@@Type: PerlCode
      @@@enDesc: The newly created value object.
      @@@PerlDef:
        __DEEP{
          if (ref $value eq 'HASH' or ref $value eq 'ARRAY') {
            $r = $self-><M::Document.createElementNS>
                     (<Q::pc:>, ref $value eq 'HASH' ? 'hashRefLiteral'
                                                     : 'arrayRefLiteral');
            for my $v (ref $value eq 'HASH' ? %$value : @$value) {
              my $vo;
              if (UNIVERSAL::isa ($v, <IFName::PerlCode>)) {
                $vo = $self-><M::Document.adoptNode> ($v);
              } else {
                $vo = $self-><M::PCDocument.createPCLiteral> ($v);
              }
              $r-><M::Node.appendChild> ($vo);
            }
          } elsif (defined $value) {
            $r = $self-><M::Document.createElementNS>
                   (<Q::pc:>, 'stringLiteral');
            $r-><AS::Node.textContent> ($value);
          } else {
            $r = $self-><M::Document.createElementNS>
                          (<Q::pc:>, 'atom');
            $r-><AS::Node.textContent> ('undef');
          }
        }__;
    @@Test:
      @@@QName: PCDocument.createPCLiteral.undef.test
      @@@PerlDef:
        my $doc;
        __CODE{createPCDocumentForTest:: $doc => $doc}__;

        $test->id ('undef.element');
        my $e1 = $doc-><M::PCDocument.createPCLiteral> (null);
        $test->assert_isa ($e1, <IFName::PerlAtom>);
        $test->assert_equals ($e1-><AG::Node.textContent>, 'undef');

        $test->id ('string.empty.element');
        my $e2 = $doc-><M::PCDocument.createPCLiteral> ('');
        $test->assert_isa ($e2, <IFName::PerlStringLiteral>);
        $test->assert_equals ($e2-><AG::Node.textContent>, '');

        $test->id ('string.zero.element');
        my $e3 = $doc-><M::PCDocument.createPCLiteral> ('0');
        $test->assert_isa ($e3, <IFName::PerlStringLiteral>);
        $test->assert_equals ($e3-><AG::Node.textContent>, '0');

  @Method:
    @@Name: createPCNumberLiteral
    @@enDesc:
      Creates a number literal object.
    @@Param:
      @@@Name: value
      @@@Type: DISPerl|NumberValue
      @@@enDesc:
        The value.
    @@Return:
      @@@Type: PCNumberValue
      @@@enDesc: The newly created value object.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS>
                   (<Q::pc:>, 'numberLiteral');
          $r-><AS::Node.textContent> ($value);
        }__;

  @Method:
    @@Name: createPCVariable
    @@enDesc:
      Creates a new <IF::PerlVariable> object. 
    @@Param:
      @@@Name: variableType
      @@@Type: DOMString
      @@@enDesc:
        Variable prefix.
      @@@nullCase:
        @@@@enDesc:
          If the <P::packageName> is <DOM::null>, then 
          the <P::variableType> is detected by the prefix of
          <P::localName>.  Otherwise, it is an unprefixed variable
          such as file handle.
    @@Param:
      @@@Name: packageName
      @@@Type: DOMString
      @@@enDesc:
        Package name.
      @@@nullCase:
        @@@@enDesc:
          The variable belongs to the current package or a 
          lexical-scoped variable.
    @@Param:
      @@@Name: localName
      @@@Type: DOMString
      @@@enDesc:
        Variable name.  If both <P::variableType> and <P::packageName>
        is <DOM::null>, the <P::localName> value may be prefixed
        by any possible <P::variableType> value.
    @@Return:
      @@@Type: PerlVariable
      @@@enDesc: 
        Newly created Perl variable object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::Document.createElementNS> (<Q::pc:>, 'variable');
            if (not $variableType and not $packageName and
                $localName =~ s/^(\\?[\$\@%&*])//) {
              $variableType = $1;
            }
            $r-><AS::PerlVariable.variableType> ($variableType)
                                                  if defined $variableType;
            $r-><AS::PerlVariable.packageName> ($packageName)
                                                  if defined $packageName;
            $r-><AS::PerlVariable.pcLocalName> ($localName);
          }__;

  @Method:
    @@Name: createPCDereference
    @@enDesc:
      Creates a <IF::PCDereference> object.
    @@Param:
      @@@Name: variableType
      @@@Type: DOMString
      @@@enDesc:
        The type of the referenced value, such as <Perl::$>.
    @@Return:
      @@@Type: PCDereference
      @@@enDesc:
        The newly created element node.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS>
                        (<Q::pc:>, 'dereference');
          $r-><AS::PCDereference.variableType> ($variableType);
        }__;

  @Method:
    @@Name: createPCReference
    @@enDesc:
      Creates a <IF::PCReference> object.
    @@Return:
      @@@Type: PCReference
      @@@enDesc:
        The newly created element node.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS>
                        (<Q::pc:>, 'reference');
        }__;

  @Method:
    @@Name: createPCExpression
    @@enDesc:
      Creates a <Q::pc:expression> element node.
    @@Param:
      @@@Name: operator
      @@@Type: DOMString
      @@@enDesc:
        The operator of the expression.
    @@Return:
      @@@Type: PCExpression
      @@@enDesc:
        The newly created expression object.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS> (<Q::pc:>, 'expression');
          $r-><AS::PCExpression.operator> ($operator);
        }__;

  @Method:
    @@Name: createPCApply
    @@enDesc:
      Creates a <Q::pc:apply> element node.
    @@Return:
      @@@Type: PCApply
      @@@enDesc: The newly created element node.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS> (<Q::pc:>, 'apply');
        }__;

  @Method:
    @@Name: createPCFunctionCall
    @@enDesc:
      Creates a function call element node.
    @@Param:
      @@@Name: package
      @@@Type: DOMString
      @@@enDesc:
        The package to which the function belongs.
      @@@nullCase:
        @@@@enDesc: No package name.
    @@Param:
      @@@Name: localName
      @@@Type: DOMString
      @@@enDesc:
        The local part of the function name.
    @@Return:
      @@@Type: PCApply
      @@@enDesc:
        The newly created function object.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS> (<Q::pc:>, 'apply');
          my $func = $self-><M::PCDocument.createPCVariable>
                              ('', $package, $localName);
          $r-><M::Node.appendChild> ($func);
        }__;

  @Method:
    @@Name: createPCStatement
    @@enDesc:
      Creates a statement object.
    @@Return:
      @@@Type: PerlStatement
      @@@enDesc:
        The newly created statement element node.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS> (<Q::pc:>, 'statement');
        }__;      

  @Method:
    @@Name: createPCBlock
    @@enDesc:
      Creates a <Q::pc2:block> element node.
    @@Return:
      @@@Type: PCBlock
      @@@enDesc:
        The newly created <Q::pc2:block> element.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS> (<Q::pc2:>, 'block');
        }__;

  @Method:
    @@Name: createPCChoose
    @@enDesc:
      Creates a <Q::pc:choose> element node.
    @@Return:
      @@@Type: PCChoose
      @@@enDesc:
        The newly created <Q::pc:choose> element.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS> (<Q::pc:>, 'choose');
        }__;

  @Method:
    @@Name: createPCWhile
    @@enDesc:
      Creates a <Q::pc:while> element node.
    @@Return:
      @@@Type: PCWhile
      @@@enDesc:
        The newly created <Q::pc:while> element.
      @@@PerlDef:
        __DEEP{
          $r = $self-><M::Document.createElementNS> (<Q::pc:>, 'while');
          $r-><M::Node.appendChild>
                ($self-><M::Document.createElementNS> (<Q::pc2:>, 'condition'));
          $r-><M::Node.appendChild>
                ($self-><M::Document.createElementNS> (<Q::pc2:>, 'block'));
        }__;

  @Method:
    @@Name: createPerlSub
    @@enDesc:
      Creates a new <IF::PerlSub> object. 
    @@Param:
      @@@Name: subName
      @@@Type: DOMString
      @@@enDesc:
        The name of the subroutine to create.
      @@@nullCase:
        @@@@enDesc:
          The subroutine created has no name. 
    @@Return:
      @@@Type: PerlSub
      @@@enDesc: 
        Newly created Perl subroutine object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::Document.createElementNS> (<Q::pc:>, 'sub');
            $r-><M::PerlSub.addPerlName> ($subName) if defined $subName;
          }__;

  @ResourceDef:
    @@ForCheck: ManakaiDOM|ForClass
    @@QName: createPCDocumentForTest
    @@rdf:type: DISPerl|BlockCode
    @@PerlDef:
      my $impl = <Class::ManakaiPCImplementation>->_new;
      $doc = $impl-><M::DOMImpl.createDocument> (<Q::pc:>, 'file');
##PCDocument

## -- Implementation

IFClsDef:
  @IFQName: PCImplementation
  @CQName: ManakaiPCImplementation

  @enDesc:
    The class that provides factory methods. 

  @CISA: DOMCore|ManakaiDOMImplementation||ManakaiDOM|ManakaiDOMLatest
  @CISA: dx|ManakaiDefaultExceptionHandler||ManakaiDOM|Perl

  @f:provides: pc|CoreFeature10

  @Method:
    @@Name: createPerlFile
    @@enDesc:
      Creates a Perl code file. 
    @@Return:
      @@@Type: PerlFile
      @@@enDesc: A newly created Perl source file object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><AG::Document.documentElement>;
          }__;

  @Method:
    @@Name: createPerlPackage
    @@enDesc:
      Creates a new package scope block. 
    @@Param:
      @@@Name: packageName
      @@@Type: DOMString
      @@@enDesc:
        The fully-qualified name of the package to create. 
    @@Return:
      @@@Type: PerlPackage
      @@@enDesc:
        The newly created package scope object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS> (<Q::pc:>, 'package');
            $r-><AS::PerlPackage.packageName> ($packageName);
          }__;

  @IntMethod:
    @@ForCheck: ManakaiDOM|ForClass
    @@Name: perlComment
    @@ManakaiDOM:isStatic:1
    @@enDesc:
      Generates a Perl comment string. 
    @@Param:
      @@@Name: str
      @@@Type: DOMString
      @@@enDesc:
        A comment text. 
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        A Perl comment string.
      @@@PerlDef:
        $r = $str;
        $r =~ s/\n/\n## /g;
        $r =~ s/\n## $/\n/s;
        $r .= "\n" unless $r =~ /\n$/;
        $r = q<## > . $r;

  @IntMethod:
    @@ForCheck: ManakaiDOM|ForClass
    @@Name: rfc3339DateTime
    @@ManakaiDOM:isStatic:1
    @@enDesc:
      Returns RFC 3339 <CODE::date-time> representation of a date. 
    @@Param:
      @@@Name: perlDate
      @@@Type: idl|unsignedLong||ManakaiDOM|all
      @@@enDesc:
        A Perl representation of date. 
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        RFC 3339 date string. 
      @@@PerlDef:
        my @time = gmtime $perlDate;
        $r = sprintf q<%04d-%02d-%02dT%02d:%02d:%02d+00:00>,
                     $time[5] + 1900, $time[4] + 1, @time[3,2,1,0];

  @IntMethod:
    @@ForCheck: ManakaiDOM|ForClass
    @@Name: versionDateTime
    @@ManakaiDOM:isStatic:1
    @@enDesc:
      Returns date for version. 
    @@Param:
      @@@Name: perlDate
      @@@Type: idl|unsignedLong||ManakaiDOM|all
      @@@enDesc:
        A Perl representation of date. 
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        A Perl number literal. 
      @@@PerlDef:
        my @time = gmtime $perlDate;
        $r = sprintf q<%04d%02d%02d.%02d%02d>,
                     $time[5] + 1900, $time[4] + 1, @time[3,2,1];
  
  @Method:
    @@Name: perlLiteral
    @@enDesc:
      Perl code representation. 
    @@Param:
      @@@Name: val
      @@@Type: DISPerl|Any||ManakaiDOM|all
      @@@enDesc:
        A Perl value. 
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        A Perl lexical representation of <P::val>. 
      @@@PerlDef:
        unless (defined $val) {
          $r = q<undef>;
        } elsif (ref $val eq 'ARRAY') {
          __DEEP{
            $r = q<[> . <ClassM::ManakaiPCImplementation
                                            .perlList> ($val) . q<]>;
          }__;
        } elsif (ref $val eq 'HASH') {
          __DEEP{
            $r = q<{>
               . <ClassM::ManakaiPCImplementation.perlList>
                   ([map {$_ => $val->{$_}} sort {$a cmp $b} keys %$val])
               . q<}>;
          }__;
        } elsif (ref $val eq 'manakai::code') {
          $r = $$val;
        } else {
          $val =~ s/(['\\])/\\$1/g;
          $r = q<'> . $val . q<'>;
        }

  @Method:
    @@Name: perlList
    @@enDesc:
      Perl code representation of a list. 
    @@Param:
      @@@Name: val
      @@@Type: DISPerl|ARRAY||ManakaiDOM|all
      @@@enDesc:
        A Perl array reference. 
    @@Return:
      @@@Type: DOMString
      @@@enDesc:
        A Perl lexical representation of <CODE::@$val>. 
      @@@PerlDef:
        __DEEP{
          $r = join (q<, >, map {<ClassM::ManakaiPCImplementation
                                              .perlLiteral> ($_)} @{$val});
        }__;

  @Method:
    @@Name: createPerlSub
    @@enDesc:
      Creates a new <IF::PerlSub> object. 
    @@Param:
      @@@Name: subName
      @@@Type: DOMString
      @@@enDesc:
        The name of the subroutine to create.
      @@@nullCase:
        @@@@enDesc:
          The subroutine created has no name. 
    @@Return:
      @@@Type: PerlSub
      @@@enDesc: 
        Newly created Perl subroutine object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS> (<Q::pc:>, 'sub');
            $r-><M::PerlSub.addPerlName> ($subName) if defined $subName;
          }__;

  @Method:
    @@Name: createPerlUnparsedCode
    @@enDesc:
      Creates a new <Class::ManakaiPerlUnparsedCode> object. 
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        The code fragment. 
      @@@nullCase:
        @@@@enDesc:
          The fragment initially has no code. 
    @@Return:
      @@@Type: PerlUnparsedCode
      @@@enDesc: 
        Newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS> (<Q::pc:>, 'unparsed');
            $r-><AS::Node.textContent> ($codeArg) if defined $codeArg;
          }__;

  @Method:
    @@Name: createPerlInlineContainer
    @@enDesc:
      Creates a new <IF::PerlInlineContainer> object. 
    @@Return:
      @@@Type: PerlCodeInlines
      @@@enDesc: 
        Newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                  -><M::Document.createElementNS> (<Q::pc:>, 'inlineContainer');
          }__;

  @Method:
    @@Name: createPerlInlineUnparsedCode
    @@enDesc:
      Creates a new <IF::PerlInlineUnparsedCode> object. 
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        The code fragment. 
      @@@nullCase:
        @@@@enDesc:
          The fragment initially has no code. 
    @@Return:
      @@@Type: PerlInlineUnparsedCode
      @@@enDesc: 
        Newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                   -><M::Document.createElementNS> (<Q::pc:>, 'inlineUnparsed');
            $r-><AS::Node.textContent> ($codeArg) if defined $codeArg;
          }__;

  @Method:
    @@Name: createPerlBare
    @@enDesc:
      Creates a new <IF::PerlTokens> object. 
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        The code fragment. 
    @@Return:
      @@@Type: PerlTokens
      @@@enDesc: 
        Newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS> (<Q::pc:>, 'tokens');
            $r-><AS::Node.textContent> ($codeArg) if defined $codeArg;
          }__;

  @Method:
    @@Name: createPerlAtom
    @@enDesc:
      Creates a new <IF::PerlAtom> object. 
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        The code fragment. 
    @@Return:
      @@@Type: PerlAtom
      @@@enDesc: 
        Newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS> (<Q::pc:>, 'atom');
            $r-><AS::Node.textContent> ($codeArg) if defined $codeArg;
          }__;

  @Method:
    @@Name: createPerlStringLiteral
    @@enDesc:
      Creates a new <IF::PerlStringLiteral> object. 
    @@Param:
      @@@Name: stringArg
      @@@Type: DOMString
      @@@enDesc: A string.
    @@Return:
      @@@Type: PerlStringLiteral
      @@@enDesc: 
        Newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                   -><M::Document.createElementNS> (<Q::pc:>, 'stringLiteral');
            $r-><AS::Node.textContent> ($stringArg);
          }__;

  @Method:
    @@Name: createPerlVariable
    @@enDesc:
      Creates a new <IF::PerlVariable> object. 
    @@Param:
      @@@Name: variableType
      @@@Type: DOMString
      @@@enDesc:
        Variable prefix.
      @@@nullCase:
        @@@@enDesc:
          If the <P::packageName> is <DOM::null>, then 
          the <P::variableType> is detected by the prefix of
          <P::localName>.  Otherwise, it is an unprefixed variable
          such as file handle.
    @@Param:
      @@@Name: packageName
      @@@Type: DOMString
      @@@enDesc:
        Package name.
      @@@nullCase:
        @@@@enDesc:
          The variable belongs to the current package or a 
          lexical-scoped variable.
    @@Param:
      @@@Name: localName
      @@@Type: DOMString
      @@@enDesc:
        Variable name.  If both <P::variableType> and <P::packageName>
        is <DOM::null>, the <P::localName> value may be prefixed
        by any possible <P::variableType> value.
    @@Return:
      @@@Type: PerlVariable
      @@@enDesc: 
        Newly created Perl variable object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS> (<Q::pc:>, 'variable');
            if (not $variableType and not $packageName and
                $localName =~ s/^(\\?[\$\@%&*])//) {
              $variableType = $1;
            }
            $r-><AS::PerlVariable.variableType> ($variableType)
                                                  if defined $variableType;
            $r-><AS::PerlVariable.packageName> ($packageName)
                                                  if defined $packageName;
            $r-><AS::PerlVariable.pcLocalName> ($localName);
          }__;

  @Method:
    @@Name: createPerlBlock
    @@enDesc:
      Creates a new <IF::PerlBlock> object. 
    @@Return:
      @@@Type: PerlBlock
      @@@enDesc: 
        Newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS> (<Q::pc:>, 'block');
          }__;

  @Method:
    @@Name: createPerlBlockContainer
    @@enDesc:
      Creates a new <Class::ManakaiPerlBlockContainer> object. 
    @@Return:
      @@@Type: PerlCodeBlocks
      @@@enDesc: 
        Newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                    -><M::Document.createElementNS> (<Q::pc:>, 'blockContainer');
          }__;

  @Method:
    @@Name: createPerlStatement
    @@enDesc:
      Creates a new Perl statement.
    @@Param:
      @@@Name: codeArg
      @@@Type: DOMString
      @@@enDesc:
        A Perl statement without terminating <Perl::;>.
      @@@nullCase:
        @@@@enDesc:
          No initial content.
    @@Return:
      @@@Type: PerlStatement
      @@@enDesc:
        The newly created Perl code object. 
      @@@PerlDef:
          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS> (<Q::pc:>, 'statement');
            if (defined $codeArg) {
              $r-><M::PerlCodeUnits.appendBare> ($codeArg);
            }
          }__;

  @Method:
    @@Name: createPerlIf
    @@enDesc:
      Creates a <IF::PerlIf> object. 
    @@Param:
      @@@Name: conditionArg
      @@@Type: PerlCodeInlines
      @@@enDesc:
        Conditoon code fragment object.
    @@Param:
      @@@Name: trueArg
      @@@Type: PerlCodeBlocks
      @@@enDesc:
        A true code fragment object. 
      @@@nullCase:
        @@@@enDesc: No true code.
    @@Param:
      @@@Name: falseArg
      @@@Type: PerlCodeBlocks
      @@@enDesc:
        A false code fragment object. 
      @@@nullCase:
        @@@@enDesc: No false code.
    @@Return:
      @@@Type: PerlIf
      @@@RaiseException:
        @@@@@:BAD_CHILD_ERR
        @@@@enDesc:
          An attempt is made to append a child
          that is not valid type.
      @@@RaiseException:
        @@@@@:IN_USE_NODE_ERR
        @@@@enDesc:
          An attempt is made to append a node that is 
          already used elsewhere. 
      @@@PerlDef:
          for my $arg ([conditionArg => $conditionArg]) {
            if ({
              atom => 1, tokens => 1, inlineContainer => 1, assignment => true,
              inlineUnparsed => 1, variable => 1, stringLiteral => true,
              list => true, arrayRefLiteral => true, hashRefLiteral => true,
            }->{$arg->[1]-><AG::Node.localName>}) {
              if ($arg->[1]-><AG::Node.parentNode>) {
                __EXCEPTION{IN_USE_NODE_ERR::
                  pc:childNode => {$arg->[1]},
                  MDOMX:param-name => {$arg->[0]},
                }__;
              }
            } else {
              __EXCEPTION{BAD_CHILD_ERR::
                pc:parentNode => {$self},
                pc:childNode => {$arg->[1]},
                MDOMX:param-name => {$arg->[0]},
              }__;
            }
          } # c

          for my $arg ([trueArg => $trueArg],
                       [falseArg => $falseArg]) {
            next unless $arg->[1];
            if ({
                  blockContainer => true,
                }->{$arg->[1]-><AG::Node.localName>}) {
              if ($arg->[1]-><AG::Node.parentNode>) {
                __EXCEPTION{IN_USE_NODE_ERR::
                  pc:childNode => {$arg->[1]},
                  MDOMX:param-name => {$arg->[0]},
                }__;
              }
            } else {
              __EXCEPTION{BAD_CHILD_ERR::
                pc:parentNode => {$self},
                pc:childNode => {$arg->[1]},
                MDOMX:param-name => {$arg->[0]},
              }__;
            }
          } # t/f

          __DEEP{
            $r = $self-><M::DOMImpl.createDocument> (<Q::pc:>, 'file')
                      -><M::Document.createElementNS>
                            (<Q::pc:>, 'if');
            $r-><AS::PerlIf.condition> ($conditionArg) if $conditionArg;
            $r-><AS::PerlIf.trueCode> ($trueArg) if $trueArg;
            $r-><AS::PerlIf.falseCode> ($falseArg) if $falseArg;
          }__;
##PCImplementation

ResourceDef:
  @QName: DOMImpl
  @AliasFor: DOMCore|DOMImplementation
  @For: ManakaiDOM|DOM

ResourceDef:
  @QName: NodeList
  @AliasFor: DOMCore|NodeList
  @For: ManakaiDOM|DOM

ResourceDef:
  @QName: Node
  @AliasFor: DOMCore|Node
  @For: ManakaiDOM|DOM

ResourceDef:
  @QName: Element
  @AliasFor: DOMCore|Element
  @For: ManakaiDOM|DOM

ResourceDef:
  @QName: Document
  @AliasFor: DOMCore|Document
  @For: ManakaiDOM|DOM

## -- Exceptions

ResourceDef:
  @rdf:type:
    @@@: dis|MultipleResource
    @@ForCheck: !ManakaiDOM|ForIF !ManakaiDOM|ForClass
  @resourceFor: ManakaiDOM|ForIF
  @resourceFor: ManakaiDOM|ForClass

  @For: ManakaiDOM|Perl

  @rdf:type:
    @@@: dx|Interface
    @@ForCheck: ManakaiDOM|ForIF

  @rdf:type:
    @@@: dx|Class
    @@ForCheck: ManakaiDOM|ForClass

  @Implement:
    @@@: ||ManakaiDOM|ManakaiDOM|ManakaiDOM||ManakaiDOM|ForIF
    @@ContentType: DISCore|TFPQNames
    @@ForCheck: ManakaiDOM|ForClass
  @Implement:
    @@@: ||ManakaiDOM|ManakaiDOM|ManakaiDOMLatest||ManakaiDOM|ForIF
    @@ContentType: DISCore|TFPQNames
    @@ForCheck: ManakaiDOM|ForClass
  @dx:implementedBy: ||ManakaiDOM|ManakaiDOMLatest||ManakaiDOM|ForClass

  @f:implements: pc|CoreFeature10

  @ISA:
    @@@: dx|Exception||ManakaiDOM|Perl
    @@ForCheck: ManakaiDOM|ForClass

  @IFQName: PCException
  @QName:
    @@@: ManakaiPCException
    @@ForCheck: ManakaiDOM|ForClass

  @enDesc:
    Exceptions for the <Module::Util:PerlCode> module.

  @ResourceDef:
    @@ForCheck: ManakaiDOM|ForIF
    @@rdf:type: DISLang|ConstGroup

    @@IFQName: PCExceptionCode

    @@enDesc:
      Exception codes for <IF::PCException>. 

    @@Type: idl|unsignedShort||ManakaiDOM|all
    @@rdfs:subClassOf: idl|unsignedShort||ManakaiDOM|all

    @@XConstDef:
      @@@Name: HIERARCHY_REQUEST_ERR
      @@@Value:
        @@@@@:3
        @@@@ContentType: DISCore|Integer
      @@@enDesc:
        An attempt is made to break the hierarchy. 
      @@@XSubTypeDef:
        @@@@QName: BAD_CHILD_ERR
        @@@@enDesc:
          An attempt is made to append a node as a child whose type 
          is not allowed. 
        @@@@XParam:
          @@@@@QName: childNode
          @@@@@enDesc:
            The node attempted to append. 
        @@@@XParam:
          @@@@@QName: parentNode
          @@@@@enDesc:
            The node to whose child list an attempt to append is made. 
      @@@XSubTypeDef:
        @@@@QName: IN_USE_NODE_ERR
        @@@@enDesc:
          An attempt is made to append a node that has already been used
          elsewhere. 
        @@@@XParam:
          @@@@@QName: childNode
          @@@@@enDesc:
            The node attempted to append. 
        @@@@XParam:
          @@@@@QName: parentNode
          @@@@@enDesc:
            The parent node of the <XP::childNode>. 
    @@XConstDef:
      @@@Name: NOT_SUPPORTED_ERR
      @@@Value:
        @@@@@:9
        @@@@ContentType: DISCore|Integer
      @@@enDesc:
        An attempt is made to do something the implementation does not support. 
      @@@XSubTypeDef:
        @@@@QName: UNSUPPORTED_OPERATOR_ERR
        @@@@enDesc:
          The implementation does not support the specified operator. 
        @@@@XParam:
          @@@@@QName: operator
          @@@@@enDesc:
            The operator that is not supported. 
        @@@@enMufDef:
          Operator "%p (name => {<Q::pc:operator>});" is not supported
##PCException

ElementTypeBinding:
  @Name: XConstDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: dx|ErrorCode

ElementTypeBinding:
  @Name: XSubTypeDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: dx|ErrorSubCode

ElementTypeBinding:
  @Name: XParam
  @ElementType:
    ecore:hasParameter

ElementTypeBinding:
  @Name: XParamDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type: ecore|Parameter
    @@For: =ManakaiDOM|all

ElementTypeBinding:
  @Name: enMufDef
  @ElementType:
    ecore:defaultMessage
  @ShadowContent:
    @@ContentType:
      lang:muf
    @@lang:en

ElementTypeBinding:
  @Name: Method
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:Method

ElementTypeBinding:
  @Name: ToStringMethod
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:Method
    @@Operator:
      @@@@:
        DISPerl:AsStringMethod
      @@@ContentType: DISCore|QName
    @@Description:
      @@@lang:en
      @@@@:
        Returns the textual Perl source code representation of this object. 

ElementTypeBinding:
  @Name: NumValMethod
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:Method
    @@Operator:
      @@@@: 0+
      @@@ContentType:
        lang:Perl
    @@Description:
      @@@lang:en
      @@@@:
        Returns the numeric value of this object.

ElementTypeBinding:
  @Name: IntMethod
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:Method
    @@ManakaiDOM:isForInternal:1

ElementTypeBinding:
  @Name: Attr
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:Attribute

ElementTypeBinding:
  @Name: Return
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:MethodReturn

ElementTypeBinding:
  @Name: Get
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:AttributeGet

ElementTypeBinding:
  @Name: Set
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:AttributeSet

ElementTypeBinding:
  @Name: Param
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:MethodParameter

ElementTypeBinding:
  @Name: PerlDef
  @ElementType:
    dis:Def
  @ShadowContent:
    @@ContentType:
      lang:Perl
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: PerlCDef
  @ElementType:
    dis:Def
  @ShadowContent:
    @@ContentType:
      lang:Perl

ElementTypeBinding:
  @Name: disDef
  @ElementType:
    dis:Def
  @ShadowContent:
    @@ContentType:
      lang:dis
    @@ForCheck: ManakaiDOM|ForClass

ElementTypeBinding:
  @Name: InCase
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      ManakaiDOM:InCase

ElementTypeBinding:
  @Name: nullCase
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      ManakaiDOM:InCase
    @@Value:
      @@@is-null:1

ElementTypeBinding:
  @Name: TrueCase
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      ManakaiDOM:InCase
    @@Value:
      @@@@:1
      @@@ContentType: DISCore|Boolean
    @@Type:
      DOMMain:boolean::ManakaiDOM:all


ElementTypeBinding:
  @Name: FalseCase
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      ManakaiDOM:InCase
    @@Value:
      @@@@:0
      @@@ContentType: DISCore|Boolean
    @@Type:
      DOMMain:boolean::ManakaiDOM:all

ElementTypeBinding:
  @Name: enDesc
  @ElementType:
    dis:Description
  @ShadowContent:
    @@lang:en

ElementTypeBinding:
  @Name: PropDef
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      rdf:Property
    @@For: =ManakaiDOM|all

ElementTypeBinding:
  @Name: NamedParam
  @ElementType:
    dis:ResourceDef
  @ShadowContent:
    @@rdf:type:
      DISLang:MethodParameter
    @@DISPerl:isNamedParameter:1
