misc/translator/TmplTokenType.pm

   1 package TmplTokenType;
   2
   3 use strict;
   4 require Exporter;
   5
   6 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
   7
   8 ###############################################################################
   9
  10 =head1 NAME
  11
  12 TmplTokenType.pm - Types of TmplToken objects
  13
  14 =head1 DESCRIPTION
  15
  16 This is a Java-style "safe enum" singleton class for types of TmplToken objects.
  17 The predefined constants are
  18
  19 =cut
  20
  21 ###############################################################################
  22
  23 $VERSION = 0.01;
  24
  25 @ISA = qw(Exporter);
  26 @EXPORT_OK = qw(
  27     &TEXT
  28     &TEXT_PARAMETRIZED
  29     &CDATA
  30     &TAG
  31     &DECL
  32     &PI
  33     &DIRECTIVE
  34     &COMMENT
  35     &UNKNOWN
  36 );
  37
  38 ###############################################################################
  39
  40 use vars qw( $_text $_text_parametrized $_cdata
  41     $_tag $_decl $_pi $_directive $_comment $_null $_unknown );
  42
  43 BEGIN {
  44     my $new = sub {
  45         my $this = 'TmplTokenType';#shift;
  46         my $class = ref($this) || $this;
  47         my $self = {};
  48         bless $self, $class;
  49         ($self->{'id'}, $self->{'name'}, $self->{'desc'}) = @_;
  50         return $self;
  51     };
  52     $_text              = &$new(0, 'TEXT');
  53     $_text_parametrized = &$new(8, 'TEXT-PARAMETRIZED');
  54     $_cdata             = &$new(1, 'CDATA');
  55     $_tag               = &$new(2, 'TAG');
  56     $_decl              = &$new(3, 'DECL');
  57     $_pi                = &$new(4, 'PI');
  58     $_directive         = &$new(5, 'DIRECTIVE');
  59     $_comment           = &$new(6, 'COMMENT');
  60     $_unknown           = &$new(7, 'UNKNOWN');
  61 }
  62
  63 sub to_string {
  64     my $this = shift;
  65     return $this->{'name'}
  66 }
  67
  68 sub TEXT                () { $_text }
  69 sub TEXT_PARAMETRIZED   () { $_text_parametrized }
  70 sub CDATA               () { $_cdata }
  71 sub TAG                 () { $_tag }
  72 sub DECL                () { $_decl }
  73 sub PI                  () { $_pi }
  74 sub DIRECTIVE           () { $_directive }
  75 sub COMMENT             () { $_comment }
  76 sub UNKNOWN             () { $_unknown }
  77
  78 ###############################################################################
  79
  80 =over
  81
  82 =item TEXT
  83
  84 normal text (#text in the DTD)
  85
  86 =item TEXT_PARAMETRIZED
  87
  88 parametrized normal text
  89 (result of simple recognition of text interspersed with <TMPL_VAR> directives;
  90 this has to be explicitly enabled in the scanner)
  91
  92 =item CDATA
  93
  94 normal text (CDATA in the DTD)
  95
  96 =item TAG
  97
  98 something that has the form of an HTML tag
  99
 100 =item DECL
 101
 102 something that has the form of an SGML declaration
 103
 104 =item PI
 105
 106 something that has the form of an SGML processing instruction
 107
 108 =item DIRECTIVE
 109
 110 a HTML::Template directive (whether or not embedded in an SGML comment)
 111
 112 =item COMMENT
 113
 114 something that has the form of an HTML comment
 115 (and is not recognized as an HTML::Template directive)
 116
 117 =item UNKNOWN
 118
 119 something that is not recognized at all by the scanner
 120
 121 =back
 122
 123 Note that end of file is currently represented by undef,
 124 instead of a constant predefined by this module.
 125
 126 =cut
 127
 128 1;