Class: Dang::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/dang/parser.rb

Defined Under Namespace

Classes: Code, Filter, Literal, MemoEntry, ParseError, RuleInfo

Constant Summary collapse

DOC_TYPES = 
{
  "html"                 => "<!doctype html>",
  "html5"                => "<!doctype html>",
  "html4"                => '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">',
  "html4 transitional"   => '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">',
  "html4 strict"         => '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">',
  "html4 frameset"       => '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">',

  "xhtml 1"              => '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">',
  "xhtml 1 transitional" => '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">',
  "xhtml 1 strict"       => '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">',
  "xhtml 1 frameset"     => '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Frameset//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-frameset.dtd">',
  "xhtml 1.1"            => '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">',
  "xhtml 1.1 basic"      => '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML Basic 1.1//EN" "http://www.w3.org/TR/xhtml-basic/xhtml-basic11.dtd">',
  "xhtml 1.2 mobile"     => '<!DOCTYPE html PUBLIC "-//WAPFORUM//DTD XHTML Mobile 1.2//EN" "http://www.openmobilealliance.org/tech/DTD/xhtml-mobile12.dtd">',
  "xhtml rdfa"           => '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML+RDFa 1.0//EN" "http://www.w3.org/MarkUp/DTD/xhtml-rdfa-1.dtd">',
  "xhtml 5"              => '<!DOCTYPE html>',

  "xml iso-8859-1"       => "<?xml version='1.0' encoding='iso-8859-1' ?>"
}
Rules = 
{}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str, debug = false) ⇒ Parser

This is distinct from setup_parser so that a standalone parser can redefine #initialize and still have access to the proper parser setup code.



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# File 'lib/dang/parser.rb', line 7

def initialize(str, debug=false)
  setup_parser(str, debug)
end

Instance Attribute Details

#failed_rule ⇒ Object (readonly)

Returns the value of attribute failed_rule.



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# File 'lib/dang/parser.rb', line 148

def failed_rule
  @failed_rule
end

#failing_rule_offset ⇒ Object (readonly)

Returns the value of attribute failing_rule_offset.



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# File 'lib/dang/parser.rb', line 27

def failing_rule_offset
  @failing_rule_offset
end

#pos ⇒ Object

Returns the value of attribute pos.



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# File 'lib/dang/parser.rb', line 28

def pos
  @pos
end

#result ⇒ Object

Returns the value of attribute result.



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# File 'lib/dang/parser.rb', line 28

def result
  @result
end

#string ⇒ Object (readonly)

Returns the value of attribute string.



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# File 'lib/dang/parser.rb', line 26

def string
  @string
end

Class Method Details

.rule_info(name, rendered) ⇒ Object 



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# File 'lib/dang/parser.rb', line 348

def self.rule_info(name, rendered)
  RuleInfo.new(name, rendered)
end

Instance Method Details

#__hyphen_ ⇒ Object

  • bs+



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# File 'lib/dang/parser.rb', line 547

def __hyphen_
  _save = self.pos
  _tmp = apply(:_bs)
  if _tmp
    while true
      _tmp = apply(:_bs)
      break unless _tmp
    end
    _tmp = true
  else
    self.pos = _save
  end
  set_failed_rule :__hyphen_ unless _tmp
  return _tmp
end

#_attr ⇒ Object

attr = (“[data” dattrs:t “]” { [t,true] } | “[” key:k “=” val:v “]” { [k, v] } | “[” key:k “]” { [k,true] })



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# File 'lib/dang/parser.rb', line 1368

def _attr

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = match_string("[data")
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_dattrs)
      t = @result
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = match_string("]")
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  [t,true] ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save2 = self.pos
    while true # sequence
      _tmp = match_string("[")
      unless _tmp
        self.pos = _save2
        break
      end
      _tmp = apply(:_key)
      k = @result
      unless _tmp
        self.pos = _save2
        break
      end
      _tmp = match_string("=")
      unless _tmp
        self.pos = _save2
        break
      end
      _tmp = apply(:_val)
      v = @result
      unless _tmp
        self.pos = _save2
        break
      end
      _tmp = match_string("]")
      unless _tmp
        self.pos = _save2
        break
      end
      @result = begin;  [k, v] ; end
      _tmp = true
      unless _tmp
        self.pos = _save2
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save3 = self.pos
    while true # sequence
      _tmp = match_string("[")
      unless _tmp
        self.pos = _save3
        break
      end
      _tmp = apply(:_key)
      k = @result
      unless _tmp
        self.pos = _save3
        break
      end
      _tmp = match_string("]")
      unless _tmp
        self.pos = _save3
        break
      end
      @result = begin;  [k,true] ; end
      _tmp = true
      unless _tmp
        self.pos = _save3
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_attr unless _tmp
  return _tmp
end

#_attrs ⇒ Object

attrs = (attr:a attrs:l { [a] + l } | attr:a { [a] })



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# File 'lib/dang/parser.rb', line 1478

def _attrs

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = apply(:_attr)
      a = @result
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_attrs)
      l = @result
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  [a] + l ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save2 = self.pos
    while true # sequence
      _tmp = apply(:_attr)
      a = @result
      unless _tmp
        self.pos = _save2
        break
      end
      @result = begin;  [a] ; end
      _tmp = true
      unless _tmp
        self.pos = _save2
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_attrs unless _tmp
  return _tmp
end

#_body ⇒ Object

body = (part:p body:b { join(p,b) } | part)



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# File 'lib/dang/parser.rb', line 1110

def _body

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = apply(:_part)
      p = @result
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_body)
      b = @result
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  join(p,b) ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    _tmp = apply(:_part)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_body unless _tmp
  return _tmp
end

#_bs ⇒ Object

bs = (“ ” | “t” | “n”)



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# File 'lib/dang/parser.rb', line 526

def _bs

  _save = self.pos
  while true # choice
    _tmp = match_string(" ")
    break if _tmp
    self.pos = _save
    _tmp = match_string("\t")
    break if _tmp
    self.pos = _save
    _tmp = match_string("\n")
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_bs unless _tmp
  return _tmp
end

#_cc_end ⇒ Object

cc_end = /[eE][dD][fF]/



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# File 'lib/dang/parser.rb', line 1541

def _cc_end
  _tmp = scan(/\A(?-mix:[eE][nN][dD][iI][fF])/)
  set_failed_rule :_cc_end unless _tmp
  return _tmp
end

#_cc_if ⇒ Object

cc_if = /[iI]/



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# File 'lib/dang/parser.rb', line 1534

def _cc_if
  _tmp = scan(/\A(?-mix:[iI][fF])/)
  set_failed_rule :_cc_if unless _tmp
  return _tmp
end

#_chunk ⇒ Object

chunk = < (!marker .)* > { text }



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# File 'lib/dang/parser.rb', line 905

def _chunk

  _save = self.pos
  while true # sequence
    _text_start = self.pos
    while true

      _save2 = self.pos
      while true # sequence
        _save3 = self.pos
        _tmp = apply(:_marker)
        _tmp = _tmp ? nil : true
        self.pos = _save3
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = get_byte
        unless _tmp
          self.pos = _save2
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
    if _tmp
      text = get_text(_text_start)
    end
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  text ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_chunk unless _tmp
  return _tmp
end

#_comment ⇒ Object

comment = (“<!” space+ < “[” space* cc_if (!“]” .)* “]” > space+ “!>” { “<!–#text>” } | “<!” space+ < “[” space* cc_end (!“]” .)* “]” > space+ “!>” { “<!#text–>” } | “<!” < (!“!>” .)* > “!>” { “<!–#text–>” })



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# File 'lib/dang/parser.rb', line 1548

def _comment

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = match_string("<!")
      unless _tmp
        self.pos = _save1
        break
      end
      _save2 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save2
      end
      unless _tmp
        self.pos = _save1
        break
      end
      _text_start = self.pos

      _save3 = self.pos
      while true # sequence
        _tmp = match_string("[")
        unless _tmp
          self.pos = _save3
          break
        end
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
        unless _tmp
          self.pos = _save3
          break
        end
        _tmp = apply(:_cc_if)
        unless _tmp
          self.pos = _save3
          break
        end
        while true

          _save6 = self.pos
          while true # sequence
            _save7 = self.pos
            _tmp = match_string("]")
            _tmp = _tmp ? nil : true
            self.pos = _save7
            unless _tmp
              self.pos = _save6
              break
            end
            _tmp = get_byte
            unless _tmp
              self.pos = _save6
            end
            break
          end # end sequence

          break unless _tmp
        end
        _tmp = true
        unless _tmp
          self.pos = _save3
          break
        end
        _tmp = match_string("]")
        unless _tmp
          self.pos = _save3
        end
        break
      end # end sequence

      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save1
        break
      end
      _save8 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save8
      end
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = match_string("!>")
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  "<!--#{text}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save9 = self.pos
    while true # sequence
      _tmp = match_string("<!")
      unless _tmp
        self.pos = _save9
        break
      end
      _save10 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save10
      end
      unless _tmp
        self.pos = _save9
        break
      end
      _text_start = self.pos

      _save11 = self.pos
      while true # sequence
        _tmp = match_string("[")
        unless _tmp
          self.pos = _save11
          break
        end
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
        unless _tmp
          self.pos = _save11
          break
        end
        _tmp = apply(:_cc_end)
        unless _tmp
          self.pos = _save11
          break
        end
        while true

          _save14 = self.pos
          while true # sequence
            _save15 = self.pos
            _tmp = match_string("]")
            _tmp = _tmp ? nil : true
            self.pos = _save15
            unless _tmp
              self.pos = _save14
              break
            end
            _tmp = get_byte
            unless _tmp
              self.pos = _save14
            end
            break
          end # end sequence

          break unless _tmp
        end
        _tmp = true
        unless _tmp
          self.pos = _save11
          break
        end
        _tmp = match_string("]")
        unless _tmp
          self.pos = _save11
        end
        break
      end # end sequence

      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save9
        break
      end
      _save16 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save16
      end
      unless _tmp
        self.pos = _save9
        break
      end
      _tmp = match_string("!>")
      unless _tmp
        self.pos = _save9
        break
      end
      @result = begin;  "<!#{text}-->" ; end
      _tmp = true
      unless _tmp
        self.pos = _save9
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save17 = self.pos
    while true # sequence
      _tmp = match_string("<!")
      unless _tmp
        self.pos = _save17
        break
      end
      _text_start = self.pos
      while true

        _save19 = self.pos
        while true # sequence
          _save20 = self.pos
          _tmp = match_string("!>")
          _tmp = _tmp ? nil : true
          self.pos = _save20
          unless _tmp
            self.pos = _save19
            break
          end
          _tmp = get_byte
          unless _tmp
            self.pos = _save19
          end
          break
        end # end sequence

        break unless _tmp
      end
      _tmp = true
      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save17
        break
      end
      _tmp = match_string("!>")
      unless _tmp
        self.pos = _save17
        break
      end
      @result = begin;  "<!--#{text}-->" ; end
      _tmp = true
      unless _tmp
        self.pos = _save17
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_comment unless _tmp
  return _tmp
end

#_dattr ⇒ Object

dattr = “[” key:k “=” val:v “]” { “data-#k=‘#v’” }



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# File 'lib/dang/parser.rb', line 1284

def _dattr

  _save = self.pos
  while true # sequence
    _tmp = match_string("[")
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_key)
    k = @result
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string("=")
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_val)
    v = @result
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string("]")
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  "data-#{k}='#{v}'" ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_dattr unless _tmp
  return _tmp
end

#_dattrs ⇒ Object

dattrs = (dattr:a dattrs:l { “#a #l” } | dattr)



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# File 'lib/dang/parser.rb', line 1328

def _dattrs

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = apply(:_dattr)
      a = @result
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_dattrs)
      l = @result
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  "#{a} #{l}" ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    _tmp = apply(:_dattr)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_dattrs unless _tmp
  return _tmp
end

#_doctype ⇒ Object

doctype = “!!!” space* rest:r { @doctype = r.empty? ? “html” : r }



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# File 'lib/dang/parser.rb', line 644

def _doctype

  _save = self.pos
  while true # sequence
    _tmp = match_string("!!!")
    unless _tmp
      self.pos = _save
      break
    end
    while true
      _tmp = apply(:_space)
      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_rest)
    r = @result
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  @doctype = r.empty? ? "html" : r ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_doctype unless _tmp
  return _tmp
end

#_end ⇒ Object

end = name:n “>” { n }



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# File 'lib/dang/parser.rb', line 815

def _end

  _save = self.pos
  while true # sequence
    _tmp = apply(:_name)
    n = @result
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string(">")
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  n ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_end unless _tmp
  return _tmp
end

#_end_filter(n) ⇒ Object

end_filter = bs* < /[a-zA-Z]+/ > &{ n == text } “:>”



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# File 'lib/dang/parser.rb', line 1974

def _end_filter(n)

  _save = self.pos
  while true # sequence
    while true
      _tmp = apply(:_bs)
      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
      break
    end
    _text_start = self.pos
    _tmp = scan(/\A(?-mix:[a-zA-Z]+)/)
    if _tmp
      text = get_text(_text_start)
    end
    unless _tmp
      self.pos = _save
      break
    end
    _save2 = self.pos
    _tmp = begin;  n == text ; end
    self.pos = _save2
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string(":>")
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_end_filter unless _tmp
  return _tmp
end

#_eof ⇒ Object

eof = !.



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# File 'lib/dang/parser.rb', line 571

def _eof
  _save = self.pos
  _tmp = get_byte
  _tmp = _tmp ? nil : true
  self.pos = _save
  set_failed_rule :_eof unless _tmp
  return _tmp
end

#_eol ⇒ Object

eol = “n”



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# File 'lib/dang/parser.rb', line 564

def _eol
  _tmp = match_string("\n")
  set_failed_rule :_eol unless _tmp
  return _tmp
end

#_filter ⇒ Object

filter = “<:” name:n bs* < (!end_filter(n) .)* > end_filter(n) { Filter.new(n, text) }



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# File 'lib/dang/parser.rb', line 2015

def _filter

  _save = self.pos
  while true # sequence
    _tmp = match_string("<:")
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_name)
    n = @result
    unless _tmp
      self.pos = _save
      break
    end
    while true
      _tmp = apply(:_bs)
      break unless _tmp
    end
    _tmp = true
    unless _tmp
      self.pos = _save
      break
    end
    _text_start = self.pos
    while true

      _save3 = self.pos
      while true # sequence
        _save4 = self.pos
        _tmp = apply_with_args(:_end_filter, n)
        _tmp = _tmp ? nil : true
        self.pos = _save4
        unless _tmp
          self.pos = _save3
          break
        end
        _tmp = get_byte
        unless _tmp
          self.pos = _save3
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
    if _tmp
      text = get_text(_text_start)
    end
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply_with_args(:_end_filter, n)
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  Filter.new(n, text) ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_filter unless _tmp
  return _tmp
end

#_key ⇒ Object

key = (name | “‘” < /[^’n]*/ > “‘” { text })



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# File 'lib/dang/parser.rb', line 1150

def _key

  _save = self.pos
  while true # choice
    _tmp = apply(:_name)
    break if _tmp
    self.pos = _save

    _save1 = self.pos
    while true # sequence
      _tmp = match_string("'")
      unless _tmp
        self.pos = _save1
        break
      end
      _text_start = self.pos
      _tmp = scan(/\A(?-mix:[^'\n]*)/)
      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = match_string("'")
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  text ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_key unless _tmp
  return _tmp
end

#_marker ⇒ Object

marker = (start | “<!” | “<=” | “<-” | - end)



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# File 'lib/dang/parser.rb', line 864

def _marker

  _save = self.pos
  while true # choice
    _tmp = apply(:_start)
    break if _tmp
    self.pos = _save
    _tmp = match_string("<!")
    break if _tmp
    self.pos = _save
    _tmp = match_string("<=")
    break if _tmp
    self.pos = _save
    _tmp = match_string("<-")
    break if _tmp
    self.pos = _save

    _save1 = self.pos
    while true # sequence
      _tmp = apply(:__hyphen_)
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_end)
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_marker unless _tmp
  return _tmp
end

#_name ⇒ Object

name = < /[a-zA-Z0-9_-:]+/ > { text }



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# File 'lib/dang/parser.rb', line 681

def _name

  _save = self.pos
  while true # sequence
    _text_start = self.pos
    _tmp = scan(/\A(?-mix:[a-zA-Z0-9_\-:]+)/)
    if _tmp
      text = get_text(_text_start)
    end
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  text ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_name unless _tmp
  return _tmp
end

#_part ⇒ Object

part = (ruby | puby | filter | comment | tag | chunk)



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# File 'lib/dang/parser.rb', line 1080

def _part

  _save = self.pos
  while true # choice
    _tmp = apply(:_ruby)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_puby)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_filter)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_comment)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_tag)
    break if _tmp
    self.pos = _save
    _tmp = apply(:_chunk)
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_part unless _tmp
  return _tmp
end

#_pclose ⇒ Object

pclose = “=>”



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# File 'lib/dang/parser.rb', line 1016

def _pclose
  _tmp = match_string("=>")
  set_failed_rule :_pclose unless _tmp
  return _tmp
end

#_pts ⇒ Object

pts = (space+ { “” } | < eol bs* > { text })



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# File 'lib/dang/parser.rb', line 735

def _pts

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _save2 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save2
      end
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  "" ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save3 = self.pos
    while true # sequence
      _text_start = self.pos

      _save4 = self.pos
      while true # sequence
        _tmp = apply(:_eol)
        unless _tmp
          self.pos = _save4
          break
        end
        while true
          _tmp = apply(:_bs)
          break unless _tmp
        end
        _tmp = true
        unless _tmp
          self.pos = _save4
        end
        break
      end # end sequence

      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save3
        break
      end
      @result = begin;  text ; end
      _tmp = true
      unless _tmp
        self.pos = _save3
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_pts unless _tmp
  return _tmp
end

#_puby ⇒ Object

puby = “<=” < (!pclose .)* > pclose { code(text) }



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# File 'lib/dang/parser.rb', line 1023

def _puby

  _save = self.pos
  while true # sequence
    _tmp = match_string("<=")
    unless _tmp
      self.pos = _save
      break
    end
    _text_start = self.pos
    while true

      _save2 = self.pos
      while true # sequence
        _save3 = self.pos
        _tmp = apply(:_pclose)
        _tmp = _tmp ? nil : true
        self.pos = _save3
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = get_byte
        unless _tmp
          self.pos = _save2
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
    if _tmp
      text = get_text(_text_start)
    end
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_pclose)
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  code(text) ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_puby unless _tmp
  return _tmp
end

#_rclose ⇒ Object

rclose = “->”



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# File 'lib/dang/parser.rb', line 952

def _rclose
  _tmp = match_string("->")
  set_failed_rule :_rclose unless _tmp
  return _tmp
end

#_rest ⇒ Object

rest = < (!eol .)* > (eol | eof) { text }



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# File 'lib/dang/parser.rb', line 581

def _rest

  _save = self.pos
  while true # sequence
    _text_start = self.pos
    while true

      _save2 = self.pos
      while true # sequence
        _save3 = self.pos
        _tmp = apply(:_eol)
        _tmp = _tmp ? nil : true
        self.pos = _save3
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = get_byte
        unless _tmp
          self.pos = _save2
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
    if _tmp
      text = get_text(_text_start)
    end
    unless _tmp
      self.pos = _save
      break
    end

    _save4 = self.pos
    while true # choice
      _tmp = apply(:_eol)
      break if _tmp
      self.pos = _save4
      _tmp = apply(:_eof)
      break if _tmp
      self.pos = _save4
      break
    end # end choice

    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  text ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_rest unless _tmp
  return _tmp
end

#_root ⇒ Object

root = doctype? body:b eof { @output = join(b,“”) }



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# File 'lib/dang/parser.rb', line 2597

def _root

  _save = self.pos
  while true # sequence
    _save1 = self.pos
    _tmp = apply(:_doctype)
    unless _tmp
      _tmp = true
      self.pos = _save1
    end
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_body)
    b = @result
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_eof)
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  @output = join(b,"") ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_root unless _tmp
  return _tmp
end

#_ruby ⇒ Object

ruby = “<-” < (!rclose .)* > rclose { code(text, false) }



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# File 'lib/dang/parser.rb', line 959

def _ruby

  _save = self.pos
  while true # sequence
    _tmp = match_string("<-")
    unless _tmp
      self.pos = _save
      break
    end
    _text_start = self.pos
    while true

      _save2 = self.pos
      while true # sequence
        _save3 = self.pos
        _tmp = apply(:_rclose)
        _tmp = _tmp ? nil : true
        self.pos = _save3
        unless _tmp
          self.pos = _save2
          break
        end
        _tmp = get_byte
        unless _tmp
          self.pos = _save2
        end
        break
      end # end sequence

      break unless _tmp
    end
    _tmp = true
    if _tmp
      text = get_text(_text_start)
    end
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_rclose)
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  code(text, false) ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_ruby unless _tmp
  return _tmp
end

#_select ⇒ Object

select = (“#” < simple > { [“id”, text] } | “.” < simple > { [“class”, text] })



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# File 'lib/dang/parser.rb', line 1852

def _select

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = match_string("#")
      unless _tmp
        self.pos = _save1
        break
      end
      _text_start = self.pos
      _tmp = apply(:_simple)
      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  ["id", text] ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save2 = self.pos
    while true # sequence
      _tmp = match_string(".")
      unless _tmp
        self.pos = _save2
        break
      end
      _text_start = self.pos
      _tmp = apply(:_simple)
      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save2
        break
      end
      @result = begin;  ["class", text] ; end
      _tmp = true
      unless _tmp
        self.pos = _save2
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_select unless _tmp
  return _tmp
end

#_selects ⇒ Object

selects = (select:s selects:t { [s] + t } | select:s { [s] })



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# File 'lib/dang/parser.rb', line 1918

def _selects

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = apply(:_select)
      s = @result
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_selects)
      t = @result
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  [s] + t ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save2 = self.pos
    while true # sequence
      _tmp = apply(:_select)
      s = @result
      unless _tmp
        self.pos = _save2
        break
      end
      @result = begin;  [s] ; end
      _tmp = true
      unless _tmp
        self.pos = _save2
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_selects unless _tmp
  return _tmp
end

#_simple ⇒ Object

simple = /[a-zA-Z0-9_-]+/



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# File 'lib/dang/parser.rb', line 1845

def _simple
  _tmp = scan(/\A(?-mix:[a-zA-Z0-9_\-]+)/)
  set_failed_rule :_simple unless _tmp
  return _tmp
end

#_slash ⇒ Object

slash = - “/>”



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# File 'lib/dang/parser.rb', line 843

def _slash

  _save = self.pos
  while true # sequence
    _tmp = apply(:__hyphen_)
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = match_string("/>")
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_slash unless _tmp
  return _tmp
end

#_space ⇒ Object

space = (“ ” | “t”)



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# File 'lib/dang/parser.rb', line 508

def _space

  _save = self.pos
  while true # choice
    _tmp = match_string(" ")
    break if _tmp
    self.pos = _save
    _tmp = match_string("\t")
    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_space unless _tmp
  return _tmp
end

#_start ⇒ Object

start = “<” name:n { n }



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# File 'lib/dang/parser.rb', line 707

def _start

  _save = self.pos
  while true # sequence
    _tmp = match_string("<")
    unless _tmp
      self.pos = _save
      break
    end
    _tmp = apply(:_name)
    n = @result
    unless _tmp
      self.pos = _save
      break
    end
    @result = begin;  n ; end
    _tmp = true
    unless _tmp
      self.pos = _save
    end
    break
  end # end sequence

  set_failed_rule :_start unless _tmp
  return _tmp
end

#_tag ⇒ Object

tag = (start:l slash { “<#l />” } | start:l space+ end:r { “<#l></#r>” } | start:l attrs:a slash { “<#l #attrs(a) />” } | start:l selects:t slash { “<#l #attrs(t) />” } | start:l selects:t attrs:a slash { “<#l #attrs(t,a) />” } | start:l attrs:a space+ end:r { “<#l #attrs(a)></#r>” } | start:l selects:t space+ end:r { “<#l #attrs(t)></#r>” } | start:l selects:t attrs:a space+ end:r { “<#l #attrs(t,a)></#r>” } | start:l selects:t attrs:a pts body:b pts:es end:r { joinm “<#l #attrs(a,t)>”,b,es,“</#r>” } | start:l attrs:a pts body:b pts:es end:r { joinm “<#l #attrs(a)>”, b, es, “</#r>” } | start:l selects:t pts:s body:b pts:es end:r { joinm “<#l #attrs(t)>”,s, b, es, “</#r>” } | start:l pts:s body:b pts:es end:r { joinm “<#l>”, s, b, es, “</#r>” })



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# File 'lib/dang/parser.rb', line 2087

def _tag

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = apply(:_slash)
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  "<#{l} />" ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save2 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save2
        break
      end
      _save3 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save3
      end
      unless _tmp
        self.pos = _save2
        break
      end
      _tmp = apply(:_end)
      r = @result
      unless _tmp
        self.pos = _save2
        break
      end
      @result = begin;  "<#{l}></#{r}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save2
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save4 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save4
        break
      end
      _tmp = apply(:_attrs)
      a = @result
      unless _tmp
        self.pos = _save4
        break
      end
      _tmp = apply(:_slash)
      unless _tmp
        self.pos = _save4
        break
      end
      @result = begin;  "<#{l} #{attrs(a)} />" ; end
      _tmp = true
      unless _tmp
        self.pos = _save4
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save5 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save5
        break
      end
      _tmp = apply(:_selects)
      t = @result
      unless _tmp
        self.pos = _save5
        break
      end
      _tmp = apply(:_slash)
      unless _tmp
        self.pos = _save5
        break
      end
      @result = begin;  "<#{l} #{attrs(t)} />" ; end
      _tmp = true
      unless _tmp
        self.pos = _save5
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save6 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save6
        break
      end
      _tmp = apply(:_selects)
      t = @result
      unless _tmp
        self.pos = _save6
        break
      end
      _tmp = apply(:_attrs)
      a = @result
      unless _tmp
        self.pos = _save6
        break
      end
      _tmp = apply(:_slash)
      unless _tmp
        self.pos = _save6
        break
      end
      @result = begin;  "<#{l} #{attrs(t,a)} />" ; end
      _tmp = true
      unless _tmp
        self.pos = _save6
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save7 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save7
        break
      end
      _tmp = apply(:_attrs)
      a = @result
      unless _tmp
        self.pos = _save7
        break
      end
      _save8 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save8
      end
      unless _tmp
        self.pos = _save7
        break
      end
      _tmp = apply(:_end)
      r = @result
      unless _tmp
        self.pos = _save7
        break
      end
      @result = begin;  "<#{l} #{attrs(a)}></#{r}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save7
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save9 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save9
        break
      end
      _tmp = apply(:_selects)
      t = @result
      unless _tmp
        self.pos = _save9
        break
      end
      _save10 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save10
      end
      unless _tmp
        self.pos = _save9
        break
      end
      _tmp = apply(:_end)
      r = @result
      unless _tmp
        self.pos = _save9
        break
      end
      @result = begin;  "<#{l} #{attrs(t)}></#{r}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save9
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save11 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save11
        break
      end
      _tmp = apply(:_selects)
      t = @result
      unless _tmp
        self.pos = _save11
        break
      end
      _tmp = apply(:_attrs)
      a = @result
      unless _tmp
        self.pos = _save11
        break
      end
      _save12 = self.pos
      _tmp = apply(:_space)
      if _tmp
        while true
          _tmp = apply(:_space)
          break unless _tmp
        end
        _tmp = true
      else
        self.pos = _save12
      end
      unless _tmp
        self.pos = _save11
        break
      end
      _tmp = apply(:_end)
      r = @result
      unless _tmp
        self.pos = _save11
        break
      end
      @result = begin;  "<#{l} #{attrs(t,a)}></#{r}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save11
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save13 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save13
        break
      end
      _tmp = apply(:_selects)
      t = @result
      unless _tmp
        self.pos = _save13
        break
      end
      _tmp = apply(:_attrs)
      a = @result
      unless _tmp
        self.pos = _save13
        break
      end
      _tmp = apply(:_pts)
      unless _tmp
        self.pos = _save13
        break
      end
      _tmp = apply(:_body)
      b = @result
      unless _tmp
        self.pos = _save13
        break
      end
      _tmp = apply(:_pts)
      es = @result
      unless _tmp
        self.pos = _save13
        break
      end
      _tmp = apply(:_end)
      r = @result
      unless _tmp
        self.pos = _save13
        break
      end
      @result = begin;  joinm "<#{l} #{attrs(a,t)}>",b,es,"</#{r}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save13
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save14 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save14
        break
      end
      _tmp = apply(:_attrs)
      a = @result
      unless _tmp
        self.pos = _save14
        break
      end
      _tmp = apply(:_pts)
      unless _tmp
        self.pos = _save14
        break
      end
      _tmp = apply(:_body)
      b = @result
      unless _tmp
        self.pos = _save14
        break
      end
      _tmp = apply(:_pts)
      es = @result
      unless _tmp
        self.pos = _save14
        break
      end
      _tmp = apply(:_end)
      r = @result
      unless _tmp
        self.pos = _save14
        break
      end
      @result = begin;  joinm "<#{l} #{attrs(a)}>", b, es, "</#{r}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save14
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save15 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save15
        break
      end
      _tmp = apply(:_selects)
      t = @result
      unless _tmp
        self.pos = _save15
        break
      end
      _tmp = apply(:_pts)
      s = @result
      unless _tmp
        self.pos = _save15
        break
      end
      _tmp = apply(:_body)
      b = @result
      unless _tmp
        self.pos = _save15
        break
      end
      _tmp = apply(:_pts)
      es = @result
      unless _tmp
        self.pos = _save15
        break
      end
      _tmp = apply(:_end)
      r = @result
      unless _tmp
        self.pos = _save15
        break
      end
      @result = begin;  joinm "<#{l} #{attrs(t)}>",s, b, es, "</#{r}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save15
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save16 = self.pos
    while true # sequence
      _tmp = apply(:_start)
      l = @result
      unless _tmp
        self.pos = _save16
        break
      end
      _tmp = apply(:_pts)
      s = @result
      unless _tmp
        self.pos = _save16
        break
      end
      _tmp = apply(:_body)
      b = @result
      unless _tmp
        self.pos = _save16
        break
      end
      _tmp = apply(:_pts)
      es = @result
      unless _tmp
        self.pos = _save16
        break
      end
      _tmp = apply(:_end)
      r = @result
      unless _tmp
        self.pos = _save16
        break
      end
      @result = begin;  joinm "<#{l}>", s, b, es, "</#{r}>" ; end
      _tmp = true
      unless _tmp
        self.pos = _save16
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_tag unless _tmp
  return _tmp
end

#_val ⇒ Object

val = (“‘” < /[^’n]*/ > “‘” { text } | < (!“]” .)* > { text })



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# File 'lib/dang/parser.rb', line 1197

def _val

  _save = self.pos
  while true # choice

    _save1 = self.pos
    while true # sequence
      _tmp = match_string("'")
      unless _tmp
        self.pos = _save1
        break
      end
      _text_start = self.pos
      _tmp = scan(/\A(?-mix:[^'\n]*)/)
      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save1
        break
      end
      _tmp = match_string("'")
      unless _tmp
        self.pos = _save1
        break
      end
      @result = begin;  text ; end
      _tmp = true
      unless _tmp
        self.pos = _save1
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save

    _save2 = self.pos
    while true # sequence
      _text_start = self.pos
      while true

        _save4 = self.pos
        while true # sequence
          _save5 = self.pos
          _tmp = match_string("]")
          _tmp = _tmp ? nil : true
          self.pos = _save5
          unless _tmp
            self.pos = _save4
            break
          end
          _tmp = get_byte
          unless _tmp
            self.pos = _save4
          end
          break
        end # end sequence

        break unless _tmp
      end
      _tmp = true
      if _tmp
        text = get_text(_text_start)
      end
      unless _tmp
        self.pos = _save2
        break
      end
      @result = begin;  text ; end
      _tmp = true
      unless _tmp
        self.pos = _save2
      end
      break
    end # end sequence

    break if _tmp
    self.pos = _save
    break
  end # end choice

  set_failed_rule :_val unless _tmp
  return _tmp
end

#apply(rule) ⇒ Object 



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# File 'lib/dang/parser.rb', line 283

def apply(rule)
  if m = @memoizations[rule][@pos]
    @pos = m.pos
    if !m.set
      m.left_rec = true
      return nil
    end

    @result = m.result

    return m.ans
  else
    m = MemoEntry.new(nil, @pos)
    @memoizations[rule][@pos] = m
    start_pos = @pos

    ans = __send__ rule

    lr = m.left_rec

    m.move! ans, @pos, @result

    # Don't bother trying to grow the left recursion
    # if it's failing straight away (thus there is no seed)
    if ans and lr
      return grow_lr(rule, nil, start_pos, m)
    else
      return ans
    end

    return ans
  end
end

#apply_with_args(rule, *args) ⇒ Object 



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# File 'lib/dang/parser.rb', line 248

def apply_with_args(rule, *args)
  memo_key = [rule, args]
  if m = @memoizations[memo_key][@pos]
    @pos = m.pos
    if !m.set
      m.left_rec = true
      return nil
    end

    @result = m.result

    return m.ans
  else
    m = MemoEntry.new(nil, @pos)
    @memoizations[memo_key][@pos] = m
    start_pos = @pos

    ans = __send__ rule, *args

    lr = m.left_rec

    m.move! ans, @pos, @result

    # Don't bother trying to grow the left recursion
    # if it's failing straight away (thus there is no seed)
    if ans and lr
      return grow_lr(rule, args, start_pos, m)
    else
      return ans
    end

    return ans
  end
end

#attrs(at, sel = []) ⇒ Object 



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# File 'lib/dang/parser.rb', line 431

def attrs(at,sel=[])
  out = []
  classes = []

  (at+sel).each do |key,val|
    if key == "class"
      classes.unshift val
    elsif val == true
      out << "#{key}"
    else
      out << "#{key}='#{val}'"
    end
  end

  unless classes.empty?
    out.unshift "class='#{classes.join(' ')}'"
  end

  out.join(' ')
end

#code(str, print = true) ⇒ Object 



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# File 'lib/dang/parser.rb', line 499

def code(str, print=true)
  Code.new(str, print)
end

#compile ⇒ Object 



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# File 'lib/dang/parser.rb', line 394

def compile
  strings = @output.flatten.map do |i|
    case i
    when Literal
      "_out << #{i.str.dump}"
    when Code
      if i.print
        "_out << (#{i.str}).to_s"
      else
        i.str
      end
    when Filter
      "_out << Dang.run_filter('#{i.name}', #{i.str.dump}).to_s"
    end
  end

  "_out = '';\n" + strings.join(";") + ";_out"
end

#current_column(target = pos) ⇒ Object 



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# File 'lib/dang/parser.rb', line 31

def current_column(target=pos)
  if c = string.rindex("\n", target-1)
    return target - c - 1
  end

  target + 1
end

#current_line(target = pos) ⇒ Object 



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# File 'lib/dang/parser.rb', line 39

def current_line(target=pos)
  cur_offset = 0
  cur_line = 0

  string.each_line do |line|
    cur_line += 1
    cur_offset += line.size
    return cur_line if cur_offset >= target
  end

  -1
end

#external_invoke(other, rule, *args) ⇒ Object 



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# File 'lib/dang/parser.rb', line 227

def external_invoke(other, rule, *args)
  old_pos = @pos
  old_string = @string

  @pos = other.pos
  @string = other.string

  begin
    if val = __send__(rule, *args)
      other.pos = @pos
      other.result = @result
    else
      other.set_failed_rule "#{self.class}##{rule}"
    end
    val
  ensure
    @pos = old_pos
    @string = old_string
  end
end

#failure_caret ⇒ Object 



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# File 'lib/dang/parser.rb', line 85

def failure_caret
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset

  line = lines[l-1]
  "#{line}\n#{' ' * (c - 1)}^"
end

#failure_character ⇒ Object 



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# File 'lib/dang/parser.rb', line 93

def failure_character
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset
  lines[l-1][c-1, 1]
end

#failure_info ⇒ Object 



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# File 'lib/dang/parser.rb', line 73

def failure_info
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset

  if @failed_rule.kind_of? Symbol
    info = self.class::Rules[@failed_rule]
    "line #{l}, column #{c}: failed rule '#{info.name}' = '#{info.rendered}'"
  else
    "line #{l}, column #{c}: failed rule '#{@failed_rule}'"
  end
end

#failure_oneline ⇒ Object 



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# File 'lib/dang/parser.rb', line 99

def failure_oneline
  l = current_line @failing_rule_offset
  c = current_column @failing_rule_offset

  char = lines[l-1][c-1, 1]

  if @failed_rule.kind_of? Symbol
    info = self.class::Rules[@failed_rule]
    "@#{l}:#{c} failed rule '#{info.name}', got '#{char}'"
  else
    "@#{l}:#{c} failed rule '#{@failed_rule}', got '#{char}'"
  end
end

#get_byte ⇒ Object 



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# File 'lib/dang/parser.rb', line 171

def get_byte
  if @pos >= @string.size
    return nil
  end

  s = @string.getbyte @pos
  @pos += 1
  s
end

#get_text(start) ⇒ Object 



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# File 'lib/dang/parser.rb', line 60

def get_text(start)
  @string[start..@pos-1]
end

#grow_lr(rule, args, start_pos, m) ⇒ Object 



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# File 'lib/dang/parser.rb', line 317

def grow_lr(rule, args, start_pos, m)
  while true
    @pos = start_pos
    @result = m.result

    if args
      ans = __send__ rule, *args
    else
      ans = __send__ rule
    end
    return nil unless ans

    break if @pos <= m.pos

    m.move! ans, @pos, @result
  end

  @result = m.result
  @pos = m.pos
  return m.ans
end

#html_doctype ⇒ Object 



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# File 'lib/dang/parser.rb', line 383

def html_doctype
  return "" unless @doctype

  unless DOC_TYPES.key? @doctype
    warn "doctype '#{@doctype}' not understood, using 'html'"
    @doctype = "html"
  end

  DOC_TYPES[@doctype].dup
end

#join(f, b) ⇒ Object 



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# File 'lib/dang/parser.rb', line 488

def join(f,b)
  f = Literal.new(f) if f.kind_of? String
  b = Literal.new(b) if b.kind_of? String

  if b.kind_of? Array
    [f] + b
  else
    [f,b]
  end
end

#joinm(*elems) ⇒ Object 



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# File 'lib/dang/parser.rb', line 478

def joinm(*elems)
  elems.map do |i|
    if i.kind_of? String
      Literal.new(i)
    else
      i
    end
  end
end

#lines ⇒ Object 



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# File 'lib/dang/parser.rb', line 52

def lines
  lines = []
  string.each_line { |l| lines << l }
  lines
end

#match_string(str) ⇒ Object 



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# File 'lib/dang/parser.rb', line 150

def match_string(str)
  len = str.size
  if @string[pos,len] == str
    @pos += len
    return str
  end

  return nil
end

#output(env = nil) ⇒ Object 



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# File 'lib/dang/parser.rb', line 413

def output(env=nil)
  out = eval(compile, env || binding).strip

  doctype = html_doctype

  if doctype.empty?
    str = out
  else
    if out.empty?
      str = doctype
    else
      str = doctype << "\n" << out
    end
  end

  str
end

#parse(rule = nil) ⇒ Object 



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# File 'lib/dang/parser.rb', line 192

def parse(rule=nil)
  # We invoke the rules indirectly via apply
  # instead of by just calling them as methods because
  # if the rules use left recursion, apply needs to
  # manage that.

  if !rule
    apply(:_root)
  else
    method = rule.gsub("-","_hyphen_")
    apply :"_#{method}"
  end
end

#raise_error ⇒ Object

Raises:



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# File 'lib/dang/parser.rb', line 116

def raise_error
  raise ParseError, failure_oneline
end

#scan(reg) ⇒ Object 



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# File 'lib/dang/parser.rb', line 160

def scan(reg)
  if m = reg.match(@string[@pos..-1])
    width = m.end(0)
    @pos += width
    return true
  end

  return nil
end

#set_failed_rule(name) ⇒ Object 



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# File 'lib/dang/parser.rb', line 141

def set_failed_rule(name)
  if @pos > @failing_rule_offset
    @failed_rule = name
    @failing_rule_offset = @pos
  end
end

#setup_foreign_grammar ⇒ Object

:stopdoc:



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# File 'lib/dang/parser.rb', line 505

def setup_foreign_grammar; end

#setup_parser(str, debug = false) ⇒ Object

Prepares for parsing str. If you define a custom initialize you must call this method before #parse



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# File 'lib/dang/parser.rb', line 15

def setup_parser(str, debug=false)
  @string = str
  @pos = 0
  @memoizations = Hash.new { |h,k| h[k] = {} }
  @result = nil
  @failed_rule = nil
  @failing_rule_offset = -1

  setup_foreign_grammar
end

#show_error(io = STDOUT) ⇒ Object 



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# File 'lib/dang/parser.rb', line 120

def show_error(io=STDOUT)
  error_pos = @failing_rule_offset
  line_no = current_line(error_pos)
  col_no = current_column(error_pos)

  io.puts "On line #{line_no}, column #{col_no}:"

  if @failed_rule.kind_of? Symbol
    info = self.class::Rules[@failed_rule]
    io.puts "Failed to match '#{info.rendered}' (rule '#{info.name}')"
  else
    io.puts "Failed to match rule '#{@failed_rule}'"
  end

  io.puts "Got: #{string[error_pos,1].inspect}"
  line = lines[line_no-1]
  io.puts "=> #{line}"
  io.print(" " * (col_no + 3))
  io.puts "^"
end

#show_pos ⇒ Object 



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# File 'lib/dang/parser.rb', line 64

def show_pos
  width = 10
  if @pos < width
    "#{@pos} (\"#{@string[0,@pos]}\" @ \"#{@string[@pos,width]}\")"
  else
    "#{@pos} (\"... #{@string[@pos - width, width]}\" @ \"#{@string[@pos,width]}\")"
  end
end