Module: EDNGRAMMAR

Includes:
Treetop::Runtime
Included in:
EDNGRAMMARParser
Defined in:
lib/parser/edngrammar.rb

Defined Under Namespace

Modules: AppPrefix0, AppString0, AppString1, Array0, Array1, Array2, Array3, Basenumber0, Basenumber1, Basenumber2, Basenumber3, Basenumber4, Basenumber5, Basenumber6, Decnumber0, Decnumber1, Decnumber2, Decnumber3, DoubleQuoted0, DoubleQuoted1, DoubleQuoted2, DoubleQuoted3, DoubleQuoted4, DoubleQuoted5, Embedded0, Embedded1, Escapable0, Escapable1, Escapable2, Escapable3, Escapable4, Escapable5, Escapable6, Escapable7, Escapable8, Hexchar0, Hexchar1, Hexchar2, HighSurrogate0, HighSurrogate1, Infin0, Infin1, Infin2, Kp0, Kp1, LowSurrogate0, LowSurrogate1, Map0, Map1, Map2, Map3, NonSurrogate0, NonSurrogate1, OC0, S0, S1, Seq0, Seq1, Seq2, Seq3, Simple0, Simple1, Simple2, Simple3, Simple4, Simple5, SingleQuoted0, SingleQuoted1, SingleQuoted2, SingleQuoted3, SingleQuoted4, SingleQuoted5, Spec0, Spec1, Spec10, Spec2, Sqstr0, Sqstr1, Streamstring0, Streamstring1, Streamstring2, Streamstring3, Tagged0, Tagged1, Tstr0, Tstr1, Uint0

Instance Method Summary collapse

Instance Method Details

#_nt_app_prefix ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1116

def _nt_app_prefix
  start_index = index
  if node_cache[:app_prefix].has_key?(index)
    cached = node_cache[:app_prefix][index]
    if cached
      node_cache[:app_prefix][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_lcalpha
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_lcalnum
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(AppPrefix0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:app_prefix][start_index] = r0

  r0
end

#_nt_app_string ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1181

def _nt_app_string
  start_index = index
  if node_cache[:app_string].has_key?(index)
    cached = node_cache[:app_string][index]
    if cached
      node_cache[:app_string][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_app_prefix
  s0 << r1
  if r1
    r2 = _nt_sqstr
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(AppString0)
    r0.extend(AppString1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:app_string][start_index] = r0

  r0
end

#_nt_array ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1487

def _nt_array
  start_index = index
  if node_cache[:array].has_key?(index)
    cached = node_cache[:array][index]
    if cached
      node_cache[:array][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  if (match_len = has_terminal?("[", false, index))
    r1 = true
    @index += match_len
  else
    terminal_parse_failure('"["')
    r1 = nil
  end
  s0 << r1
  if r1
    r2 = _nt_spec
    s0 << r2
    if r2
      i4, s4 = index, []
      r5 = _nt_item
      s4 << r5
      if r5
        r6 = _nt_S
        s4 << r6
        if r6
          s7, i7 = [], index
          loop do
            i8, s8 = index, []
            if (match_len = has_terminal?(",", false, index))
              r9 = true
              @index += match_len
            else
              terminal_parse_failure('","')
              r9 = nil
            end
            s8 << r9
            if r9
              r10 = _nt_S
              s8 << r10
              if r10
                r11 = _nt_item
                s8 << r11
                if r11
                  r12 = _nt_S
                  s8 << r12
                end
              end
            end
            if s8.last
              r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
              r8.extend(Array0)
            else
              @index = i8
              r8 = nil
            end
            if r8
              s7 << r8
            else
              break
            end
          end
          r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
          s4 << r7
          if r7
            r13 = _nt_OC
            s4 << r13
          end
        end
      end
      if s4.last
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
        r4.extend(Array1)
      else
        @index = i4
        r4 = nil
      end
      if r4
        r3 = r4
      else
        r3 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r3
      if r3
        if (match_len = has_terminal?("]", false, index))
          r14 = true
          @index += match_len
        else
          terminal_parse_failure('"]"')
          r14 = nil
        end
        s0 << r14
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Array2)
    r0.extend(Array3)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:array][start_index] = r0

  r0
end

#_nt_basenumber ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 481

def _nt_basenumber
  start_index = index
  if node_cache[:basenumber].has_key?(index)
    cached = node_cache[:basenumber][index]
    if cached
      node_cache[:basenumber][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_sign
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    if (match_len = has_terminal?("0", false, index))
      r3 = true
      @index += match_len
    else
      terminal_parse_failure('"0"')
      r3 = nil
    end
    s0 << r3
    if r3
      i4 = index
      i5, s5 = index, []
      if (match_len = has_terminal?("x", :insens, index))
        r6 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        @index += match_len
      else
        terminal_parse_failure('"x"')
        r6 = nil
      end
      s5 << r6
      if r6
        s7, i7 = [], index
        loop do
          r8 = _nt_HEXDIG
          if r8
            s7 << r8
          else
            break
          end
        end
        if s7.empty?
          @index = i7
          r7 = nil
        else
          r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
        end
        s5 << r7
        if r7
          i10, s10 = index, []
          i12, s12 = index, []
          if (match_len = has_terminal?(".", false, index))
            r13 = true
            @index += match_len
          else
            terminal_parse_failure('"."')
            r13 = nil
          end
          s12 << r13
          if r13
            s14, i14 = [], index
            loop do
              r15 = _nt_HEXDIG
              if r15
                s14 << r15
              else
                break
              end
            end
            if s14.empty?
              @index = i14
              r14 = nil
            else
              r14 = instantiate_node(SyntaxNode,input, i14...index, s14)
            end
            s12 << r14
          end
          if s12.last
            r12 = instantiate_node(SyntaxNode,input, i12...index, s12)
            r12.extend(Basenumber0)
          else
            @index = i12
            r12 = nil
          end
          if r12
            r11 = r12
          else
            r11 = instantiate_node(SyntaxNode,input, index...index)
          end
          s10 << r11
          if r11
            if (match_len = has_terminal?("p", :insens, index))
              r16 = instantiate_node(SyntaxNode,input, index...(index + match_len))
              @index += match_len
            else
              terminal_parse_failure('"p"')
              r16 = nil
            end
            s10 << r16
            if r16
              r18 = _nt_sign
              if r18
                r17 = r18
              else
                r17 = instantiate_node(SyntaxNode,input, index...index)
              end
              s10 << r17
              if r17
                s19, i19 = [], index
                loop do
                  r20 = _nt_DIGIT
                  if r20
                    s19 << r20
                  else
                    break
                  end
                end
                r19 = instantiate_node(SyntaxNode,input, i19...index, s19)
                s10 << r19
              end
            end
          end
          if s10.last
            r10 = instantiate_node(SyntaxNode,input, i10...index, s10)
            r10.extend(Basenumber1)
          else
            @index = i10
            r10 = nil
          end
          if r10
            r9 = r10
          else
            r9 = instantiate_node(SyntaxNode,input, index...index)
          end
          s5 << r9
        end
      end
      if s5.last
        r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
        r5.extend(Basenumber2)
      else
        @index = i5
        r5 = nil
      end
      if r5
        r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
        r4 = r5
      else
        i21, s21 = index, []
        if (match_len = has_terminal?("o", :insens, index))
          r22 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          @index += match_len
        else
          terminal_parse_failure('"o"')
          r22 = nil
        end
        s21 << r22
        if r22
          s23, i23 = [], index
          loop do
            r24 = _nt_ODIGIT
            if r24
              s23 << r24
            else
              break
            end
          end
          if s23.empty?
            @index = i23
            r23 = nil
          else
            r23 = instantiate_node(SyntaxNode,input, i23...index, s23)
          end
          s21 << r23
        end
        if s21.last
          r21 = instantiate_node(SyntaxNode,input, i21...index, s21)
          r21.extend(Basenumber3)
        else
          @index = i21
          r21 = nil
        end
        if r21
          r21 = SyntaxNode.new(input, (index-1)...index) if r21 == true
          r4 = r21
        else
          i25, s25 = index, []
          if (match_len = has_terminal?("b", :insens, index))
            r26 = instantiate_node(SyntaxNode,input, index...(index + match_len))
            @index += match_len
          else
            terminal_parse_failure('"b"')
            r26 = nil
          end
          s25 << r26
          if r26
            s27, i27 = [], index
            loop do
              r28 = _nt_BDIGIT
              if r28
                s27 << r28
              else
                break
              end
            end
            if s27.empty?
              @index = i27
              r27 = nil
            else
              r27 = instantiate_node(SyntaxNode,input, i27...index, s27)
            end
            s25 << r27
          end
          if s25.last
            r25 = instantiate_node(SyntaxNode,input, i25...index, s25)
            r25.extend(Basenumber4)
          else
            @index = i25
            r25 = nil
          end
          if r25
            r25 = SyntaxNode.new(input, (index-1)...index) if r25 == true
            r4 = r25
          else
            @index = i4
            r4 = nil
          end
        end
      end
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Basenumber5)
    r0.extend(Basenumber6)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:basenumber][start_index] = r0

  r0
end

#_nt_BDIGIT ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3609

def _nt_BDIGIT
  start_index = index
  if node_cache[:BDIGIT].has_key?(index)
    cached = node_cache[:BDIGIT][index]
    if cached
      node_cache[:BDIGIT][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  if has_terminal?(@regexps[gr = '\A[0-1]'] ||= Regexp.new(gr), :regexp, index)
    r0 = instantiate_node(SyntaxNode,input, index...(index + 1))
    @index += 1
  else
    terminal_parse_failure('[0-1]')
    r0 = nil
  end

  node_cache[:BDIGIT][start_index] = r0

  r0
end

#_nt_blank ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1838

def _nt_blank
  start_index = index
  if node_cache[:blank].has_key?(index)
    cached = node_cache[:blank][index]
    if cached
      node_cache[:blank][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  if (match_len = has_terminal?("\t", false, index))
    r1 = true
    @index += match_len
  else
    terminal_parse_failure('"\\t"')
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("\n", false, index))
      r2 = true
      @index += match_len
    else
      terminal_parse_failure('"\\n"')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      if (match_len = has_terminal?("\r", false, index))
        r3 = true
        @index += match_len
      else
        terminal_parse_failure('"\\r"')
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        if (match_len = has_terminal?(" ", false, index))
          r4 = true
          @index += match_len
        else
          terminal_parse_failure('" "')
          r4 = nil
        end
        if r4
          r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
          r0 = r4
        else
          @index = i0
          r0 = nil
        end
      end
    end
  end

  node_cache[:blank][start_index] = r0

  r0
end

#_nt_bstr ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1279

def _nt_bstr
  start_index = index
  if node_cache[:bstr].has_key?(index)
    cached = node_cache[:bstr][index]
    if cached
      node_cache[:bstr][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_app_string
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    r2 = _nt_sqstr
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:bstr][start_index] = r0

  r0
end

#_nt_decnumber ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 315

def _nt_decnumber
  start_index = index
  if node_cache[:decnumber].has_key?(index)
    cached = node_cache[:decnumber][index]
    if cached
      node_cache[:decnumber][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r2 = _nt_sign
  if r2
    r1 = r2
  else
    r1 = instantiate_node(SyntaxNode,input, index...index)
  end
  s0 << r1
  if r1
    s3, i3 = [], index
    loop do
      r4 = _nt_DIGIT
      if r4
        s3 << r4
      else
        break
      end
    end
    if s3.empty?
      @index = i3
      r3 = nil
    else
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    end
    s0 << r3
    if r3
      i6, s6 = index, []
      if (match_len = has_terminal?(".", false, index))
        r7 = true
        @index += match_len
      else
        terminal_parse_failure('"."')
        r7 = nil
      end
      s6 << r7
      if r7
        s8, i8 = [], index
        loop do
          r9 = _nt_DIGIT
          if r9
            s8 << r9
          else
            break
          end
        end
        if s8.empty?
          @index = i8
          r8 = nil
        else
          r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
        end
        s6 << r8
      end
      if s6.last
        r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
        r6.extend(Decnumber0)
      else
        @index = i6
        r6 = nil
      end
      if r6
        r5 = r6
      else
        r5 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r5
      if r5
        i11, s11 = index, []
        if (match_len = has_terminal?("e", :insens, index))
          r12 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          @index += match_len
        else
          terminal_parse_failure('"e"')
          r12 = nil
        end
        s11 << r12
        if r12
          r14 = _nt_sign
          if r14
            r13 = r14
          else
            r13 = instantiate_node(SyntaxNode,input, index...index)
          end
          s11 << r13
          if r13
            s15, i15 = [], index
            loop do
              r16 = _nt_DIGIT
              if r16
                s15 << r16
              else
                break
              end
            end
            if s15.empty?
              @index = i15
              r15 = nil
            else
              r15 = instantiate_node(SyntaxNode,input, i15...index, s15)
            end
            s11 << r15
          end
        end
        if s11.last
          r11 = instantiate_node(SyntaxNode,input, i11...index, s11)
          r11.extend(Decnumber1)
        else
          @index = i11
          r11 = nil
        end
        if r11
          r10 = r11
        else
          r10 = instantiate_node(SyntaxNode,input, index...index)
        end
        s0 << r10
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Decnumber2)
    r0.extend(Decnumber3)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:decnumber][start_index] = r0

  r0
end

#_nt_DIGIT ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3537

def _nt_DIGIT
  start_index = index
  if node_cache[:DIGIT].has_key?(index)
    cached = node_cache[:DIGIT][index]
    if cached
      node_cache[:DIGIT][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  if has_terminal?(@regexps[gr = '\A[0-9]'] ||= Regexp.new(gr), :regexp, index)
    r0 = instantiate_node(SyntaxNode,input, index...(index + 1))
    @index += 1
  else
    terminal_parse_failure('[0-9]')
    r0 = nil
  end

  node_cache[:DIGIT][start_index] = r0

  r0
end

#_nt_DIGIT1 ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3561

def _nt_DIGIT1
  start_index = index
  if node_cache[:DIGIT1].has_key?(index)
    cached = node_cache[:DIGIT1][index]
    if cached
      node_cache[:DIGIT1][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  if has_terminal?(@regexps[gr = '\A[1-9]'] ||= Regexp.new(gr), :regexp, index)
    r0 = instantiate_node(SyntaxNode,input, index...(index + 1))
    @index += 1
  else
    terminal_parse_failure('[1-9]')
    r0 = nil
  end

  node_cache[:DIGIT1][start_index] = r0

  r0
end

#_nt_double_quoted ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 2522

def _nt_double_quoted
  start_index = index
  if node_cache[:double_quoted].has_key?(index)
    cached = node_cache[:double_quoted][index]
    if cached
      node_cache[:double_quoted][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_unescaped
  r1.extend(DoubleQuoted0)
  r1.extend(DoubleQuoted0)
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("'", false, index))
      r2 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      r2.extend(DoubleQuoted1)
      @index += match_len
    else
      terminal_parse_failure('"\'"')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      i3, s3 = index, []
      if (match_len = has_terminal?("\\", false, index))
        r4 = true
        @index += match_len
      else
        terminal_parse_failure('"\\\\"')
        r4 = nil
      end
      s3 << r4
      if r4
        r5 = _nt_DQUOTE
        s3 << r5
      end
      if s3.last
        r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
        r3.extend(DoubleQuoted2)
        r3.extend(DoubleQuoted3)
      else
        @index = i3
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        i6, s6 = index, []
        if (match_len = has_terminal?("\\", false, index))
          r7 = true
          @index += match_len
        else
          terminal_parse_failure('"\\\\"')
          r7 = nil
        end
        s6 << r7
        if r7
          r8 = _nt_escapable
          s6 << r8
        end
        if s6.last
          r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
          r6.extend(DoubleQuoted4)
          r6.extend(DoubleQuoted5)
        else
          @index = i6
          r6 = nil
        end
        if r6
          r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
          r0 = r6
        else
          @index = i0
          r0 = nil
        end
      end
    end
  end

  node_cache[:double_quoted][start_index] = r0

  r0
end

#_nt_DQUOTE ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3513

def _nt_DQUOTE
  start_index = index
  if node_cache[:DQUOTE].has_key?(index)
    cached = node_cache[:DQUOTE][index]
    if cached
      node_cache[:DQUOTE][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  if (match_len = has_terminal?("\"", false, index))
    r0 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    @index += match_len
  else
    terminal_parse_failure('"\\""')
    r0 = nil
  end

  node_cache[:DQUOTE][start_index] = r0

  r0
end

#_nt_embedded ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1390

def _nt_embedded
  start_index = index
  if node_cache[:embedded].has_key?(index)
    cached = node_cache[:embedded][index]
    if cached
      node_cache[:embedded][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  if (match_len = has_terminal?("<<", false, index))
    r1 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    @index += match_len
  else
    terminal_parse_failure('"<<"')
    r1 = nil
  end
  s0 << r1
  if r1
    r2 = _nt_seq
    s0 << r2
    if r2
      if (match_len = has_terminal?(">>", false, index))
        r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        @index += match_len
      else
        terminal_parse_failure('">>"')
        r3 = nil
      end
      s0 << r3
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Embedded0)
    r0.extend(Embedded1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:embedded][start_index] = r0

  r0
end

#_nt_escapable ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 2772

def _nt_escapable
  start_index = index
  if node_cache[:escapable].has_key?(index)
    cached = node_cache[:escapable][index]
    if cached
      node_cache[:escapable][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  if (match_len = has_terminal?("b", false, index))
    r1 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    r1.extend(Escapable0)
    @index += match_len
  else
    terminal_parse_failure('"b"')
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("f", false, index))
      r2 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      r2.extend(Escapable1)
      @index += match_len
    else
      terminal_parse_failure('"f"')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      if (match_len = has_terminal?("n", false, index))
        r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        r3.extend(Escapable2)
        @index += match_len
      else
        terminal_parse_failure('"n"')
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        if (match_len = has_terminal?("r", false, index))
          r4 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          r4.extend(Escapable3)
          @index += match_len
        else
          terminal_parse_failure('"r"')
          r4 = nil
        end
        if r4
          r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
          r0 = r4
        else
          if (match_len = has_terminal?("t", false, index))
            r5 = instantiate_node(SyntaxNode,input, index...(index + match_len))
            r5.extend(Escapable4)
            @index += match_len
          else
            terminal_parse_failure('"t"')
            r5 = nil
          end
          if r5
            r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
            r0 = r5
          else
            if (match_len = has_terminal?("/", false, index))
              r6 = instantiate_node(SyntaxNode,input, index...(index + match_len))
              r6.extend(Escapable5)
              @index += match_len
            else
              terminal_parse_failure('"/"')
              r6 = nil
            end
            if r6
              r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
              r0 = r6
            else
              if (match_len = has_terminal?("\\", false, index))
                r7 = instantiate_node(SyntaxNode,input, index...(index + match_len))
                r7.extend(Escapable6)
                @index += match_len
              else
                terminal_parse_failure('"\\\\"')
                r7 = nil
              end
              if r7
                r7 = SyntaxNode.new(input, (index-1)...index) if r7 == true
                r0 = r7
              else
                i8, s8 = index, []
                if (match_len = has_terminal?("u", false, index))
                  r9 = true
                  @index += match_len
                else
                  terminal_parse_failure('"u"')
                  r9 = nil
                end
                s8 << r9
                if r9
                  r10 = _nt_hexchar
                  s8 << r10
                end
                if s8.last
                  r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
                  r8.extend(Escapable7)
                  r8.extend(Escapable8)
                else
                  @index = i8
                  r8 = nil
                end
                if r8
                  r8 = SyntaxNode.new(input, (index-1)...index) if r8 == true
                  r0 = r8
                else
                  @index = i0
                  r0 = nil
                end
              end
            end
          end
        end
      end
    end
  end

  node_cache[:escapable][start_index] = r0

  r0
end

#_nt_hexchar ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 2929

def _nt_hexchar
  start_index = index
  if node_cache[:hexchar].has_key?(index)
    cached = node_cache[:hexchar][index]
    if cached
      node_cache[:hexchar][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_non_surrogate
  r1.extend(Hexchar0)
  r1.extend(Hexchar0)
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    i2, s2 = index, []
    r3 = _nt_high_surrogate
    s2 << r3
    if r3
      if (match_len = has_terminal?("\\", false, index))
        r4 = true
        @index += match_len
      else
        terminal_parse_failure('"\\\\"')
        r4 = nil
      end
      s2 << r4
      if r4
        if (match_len = has_terminal?("u", false, index))
          r5 = true
          @index += match_len
        else
          terminal_parse_failure('"u"')
          r5 = nil
        end
        s2 << r5
        if r5
          r6 = _nt_low_surrogate
          s2 << r6
        end
      end
    end
    if s2.last
      r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
      r2.extend(Hexchar1)
      r2.extend(Hexchar2)
    else
      @index = i2
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:hexchar][start_index] = r0

  r0
end

#_nt_HEXDIG ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3633

def _nt_HEXDIG
  start_index = index
  if node_cache[:HEXDIG].has_key?(index)
    cached = node_cache[:HEXDIG][index]
    if cached
      node_cache[:HEXDIG][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_DIGIT
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("a", :insens, index))
      r2 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"A"')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      if (match_len = has_terminal?("b", :insens, index))
        r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        @index += match_len
      else
        terminal_parse_failure('"B"')
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        if (match_len = has_terminal?("c", :insens, index))
          r4 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          @index += match_len
        else
          terminal_parse_failure('"C"')
          r4 = nil
        end
        if r4
          r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
          r0 = r4
        else
          if (match_len = has_terminal?("d", :insens, index))
            r5 = instantiate_node(SyntaxNode,input, index...(index + match_len))
            @index += match_len
          else
            terminal_parse_failure('"D"')
            r5 = nil
          end
          if r5
            r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
            r0 = r5
          else
            if (match_len = has_terminal?("e", :insens, index))
              r6 = instantiate_node(SyntaxNode,input, index...(index + match_len))
              @index += match_len
            else
              terminal_parse_failure('"E"')
              r6 = nil
            end
            if r6
              r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
              r0 = r6
            else
              if (match_len = has_terminal?("f", :insens, index))
                r7 = instantiate_node(SyntaxNode,input, index...(index + match_len))
                @index += match_len
              else
                terminal_parse_failure('"F"')
                r7 = nil
              end
              if r7
                r7 = SyntaxNode.new(input, (index-1)...index) if r7 == true
                r0 = r7
              else
                @index = i0
                r0 = nil
              end
            end
          end
        end
      end
    end
  end

  node_cache[:HEXDIG][start_index] = r0

  r0
end

#_nt_high_surrogate ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3190

def _nt_high_surrogate
  start_index = index
  if node_cache[:high_surrogate].has_key?(index)
    cached = node_cache[:high_surrogate][index]
    if cached
      node_cache[:high_surrogate][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  if (match_len = has_terminal?("d", :insens, index))
    r1 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    @index += match_len
  else
    terminal_parse_failure('"D"')
    r1 = nil
  end
  s0 << r1
  if r1
    i2 = index
    if (match_len = has_terminal?("8", false, index))
      r3 = true
      @index += match_len
    else
      terminal_parse_failure('"8"')
      r3 = nil
    end
    if r3
      r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
      r2 = r3
    else
      if (match_len = has_terminal?("9", false, index))
        r4 = true
        @index += match_len
      else
        terminal_parse_failure('"9"')
        r4 = nil
      end
      if r4
        r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
        r2 = r4
      else
        if (match_len = has_terminal?("a", :insens, index))
          r5 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          @index += match_len
        else
          terminal_parse_failure('"A"')
          r5 = nil
        end
        if r5
          r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
          r2 = r5
        else
          if (match_len = has_terminal?("b", :insens, index))
            r6 = instantiate_node(SyntaxNode,input, index...(index + match_len))
            @index += match_len
          else
            terminal_parse_failure('"B"')
            r6 = nil
          end
          if r6
            r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
            r2 = r6
          else
            @index = i2
            r2 = nil
          end
        end
      end
    end
    s0 << r2
    if r2
      s7, i7 = [], index
      loop do
        r8 = _nt_HEXDIG
        if r8
          s7 << r8
        else
          break
        end
        if s7.size == 2
          break
        end
      end
      if s7.size < 2
        @index = i7
        r7 = nil
      else
        if s7.size < 2
          @terminal_failures.pop
        end
        r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
      end
      s0 << r7
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(HighSurrogate0)
    r0.extend(HighSurrogate1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:high_surrogate][start_index] = r0

  r0
end

#_nt_infin ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 747

def _nt_infin
  start_index = index
  if node_cache[:infin].has_key?(index)
    cached = node_cache[:infin][index]
    if cached
      node_cache[:infin][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  if (match_len = has_terminal?("Infinity", false, index))
    r1 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    r1.extend(Infin0)
    @index += match_len
  else
    terminal_parse_failure('"Infinity"')
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("-Infinity", false, index))
      r2 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      r2.extend(Infin1)
      @index += match_len
    else
      terminal_parse_failure('"-Infinity"')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      if (match_len = has_terminal?("NaN", false, index))
        r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        r3.extend(Infin2)
        @index += match_len
      else
        terminal_parse_failure('"NaN"')
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        @index = i0
        r0 = nil
      end
    end
  end

  node_cache[:infin][start_index] = r0

  r0
end

#_nt_item ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 163

def _nt_item
  start_index = index
  if node_cache[:item].has_key?(index)
    cached = node_cache[:item][index]
    if cached
      node_cache[:item][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_map
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    r2 = _nt_array
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      r3 = _nt_tagged
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        r4 = _nt_basenumber
        if r4
          r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
          r0 = r4
        else
          r5 = _nt_decnumber
          if r5
            r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
            r0 = r5
          else
            r6 = _nt_infin
            if r6
              r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
              r0 = r6
            else
              r7 = _nt_simple
              if r7
                r7 = SyntaxNode.new(input, (index-1)...index) if r7 == true
                r0 = r7
              else
                r8 = _nt_tstr
                if r8
                  r8 = SyntaxNode.new(input, (index-1)...index) if r8 == true
                  r0 = r8
                else
                  r9 = _nt_bstr
                  if r9
                    r9 = SyntaxNode.new(input, (index-1)...index) if r9 == true
                    r0 = r9
                  else
                    r10 = _nt_embedded
                    if r10
                      r10 = SyntaxNode.new(input, (index-1)...index) if r10 == true
                      r0 = r10
                    else
                      r11 = _nt_streamstring
                      if r11
                        r11 = SyntaxNode.new(input, (index-1)...index) if r11 == true
                        r0 = r11
                      else
                        @index = i0
                        r0 = nil
                      end
                    end
                  end
                end
              end
            end
          end
        end
      end
    end
  end

  node_cache[:item][start_index] = r0

  r0
end

#_nt_kp ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1788

def _nt_kp
  start_index = index
  if node_cache[:kp].has_key?(index)
    cached = node_cache[:kp][index]
    if cached
      node_cache[:kp][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_item
  s0 << r1
  if r1
    r2 = _nt_S
    s0 << r2
    if r2
      if (match_len = has_terminal?(":", false, index))
        r3 = true
        @index += match_len
      else
        terminal_parse_failure('":"')
        r3 = nil
      end
      s0 << r3
      if r3
        r4 = _nt_S
        s0 << r4
        if r4
          r5 = _nt_item
          s0 << r5
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Kp0)
    r0.extend(Kp1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:kp][start_index] = r0

  r0
end

#_nt_lcalnum ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3755

def _nt_lcalnum
  start_index = index
  if node_cache[:lcalnum].has_key?(index)
    cached = node_cache[:lcalnum][index]
    if cached
      node_cache[:lcalnum][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_lcalpha
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    r2 = _nt_DIGIT
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:lcalnum][start_index] = r0

  r0
end

#_nt_lcalpha ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3731

def _nt_lcalpha
  start_index = index
  if node_cache[:lcalpha].has_key?(index)
    cached = node_cache[:lcalpha][index]
    if cached
      node_cache[:lcalpha][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  if has_terminal?(@regexps[gr = '\A[a-z]'] ||= Regexp.new(gr), :regexp, index)
    r0 = instantiate_node(SyntaxNode,input, index...(index + 1))
    @index += 1
  else
    terminal_parse_failure('[a-z]')
    r0 = nil
  end

  node_cache[:lcalpha][start_index] = r0

  r0
end

#_nt_low_surrogate ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3309

def _nt_low_surrogate
  start_index = index
  if node_cache[:low_surrogate].has_key?(index)
    cached = node_cache[:low_surrogate][index]
    if cached
      node_cache[:low_surrogate][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  if (match_len = has_terminal?("d", :insens, index))
    r1 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    @index += match_len
  else
    terminal_parse_failure('"D"')
    r1 = nil
  end
  s0 << r1
  if r1
    i2 = index
    if (match_len = has_terminal?("c", :insens, index))
      r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"C"')
      r3 = nil
    end
    if r3
      r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
      r2 = r3
    else
      if (match_len = has_terminal?("d", :insens, index))
        r4 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        @index += match_len
      else
        terminal_parse_failure('"D"')
        r4 = nil
      end
      if r4
        r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
        r2 = r4
      else
        if (match_len = has_terminal?("e", :insens, index))
          r5 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          @index += match_len
        else
          terminal_parse_failure('"E"')
          r5 = nil
        end
        if r5
          r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
          r2 = r5
        else
          if (match_len = has_terminal?("f", :insens, index))
            r6 = instantiate_node(SyntaxNode,input, index...(index + match_len))
            @index += match_len
          else
            terminal_parse_failure('"F"')
            r6 = nil
          end
          if r6
            r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
            r2 = r6
          else
            @index = i2
            r2 = nil
          end
        end
      end
    end
    s0 << r2
    if r2
      s7, i7 = [], index
      loop do
        r8 = _nt_HEXDIG
        if r8
          s7 << r8
        else
          break
        end
        if s7.size == 2
          break
        end
      end
      if s7.size < 2
        @index = i7
        r7 = nil
      else
        if s7.size < 2
          @terminal_failures.pop
        end
        r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
      end
      s0 << r7
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(LowSurrogate0)
    r0.extend(LowSurrogate1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:low_surrogate][start_index] = r0

  r0
end

#_nt_map ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1650

def _nt_map
  start_index = index
  if node_cache[:map].has_key?(index)
    cached = node_cache[:map][index]
    if cached
      node_cache[:map][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  if (match_len = has_terminal?("{", false, index))
    r1 = true
    @index += match_len
  else
    terminal_parse_failure('"{"')
    r1 = nil
  end
  s0 << r1
  if r1
    r2 = _nt_spec
    s0 << r2
    if r2
      i4, s4 = index, []
      r5 = _nt_kp
      s4 << r5
      if r5
        r6 = _nt_S
        s4 << r6
        if r6
          s7, i7 = [], index
          loop do
            i8, s8 = index, []
            if (match_len = has_terminal?(",", false, index))
              r9 = true
              @index += match_len
            else
              terminal_parse_failure('","')
              r9 = nil
            end
            s8 << r9
            if r9
              r10 = _nt_S
              s8 << r10
              if r10
                r11 = _nt_kp
                s8 << r11
                if r11
                  r12 = _nt_S
                  s8 << r12
                end
              end
            end
            if s8.last
              r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
              r8.extend(Map0)
            else
              @index = i8
              r8 = nil
            end
            if r8
              s7 << r8
            else
              break
            end
          end
          r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
          s4 << r7
          if r7
            r13 = _nt_OC
            s4 << r13
          end
        end
      end
      if s4.last
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
        r4.extend(Map1)
      else
        @index = i4
        r4 = nil
      end
      if r4
        r3 = r4
      else
        r3 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r3
      if r3
        if (match_len = has_terminal?("}", false, index))
          r14 = true
          @index += match_len
        else
          terminal_parse_failure('"}"')
          r14 = nil
        end
        s0 << r14
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Map2)
    r0.extend(Map3)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:map][start_index] = r0

  r0
end

#_nt_non_slash ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1906

def _nt_non_slash
  start_index = index
  if node_cache[:non_slash].has_key?(index)
    cached = node_cache[:non_slash][index]
    if cached
      node_cache[:non_slash][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_blank
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if has_terminal?(@regexps[gr = '\A[!-\\.]'] ||= Regexp.new(gr), :regexp, index)
      r2 = true
      @index += 1
    else
      terminal_parse_failure('[!-\\.]')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      if has_terminal?(@regexps[gr = '\A[0-􏿿]'] ||= Regexp.new(gr), :regexp, index)
        r3 = true
        @index += 1
      else
        terminal_parse_failure('[0-􏿿]')
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        @index = i0
        r0 = nil
      end
    end
  end

  node_cache[:non_slash][start_index] = r0

  r0
end

#_nt_non_surrogate ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3007

def _nt_non_surrogate
  start_index = index
  if node_cache[:non_surrogate].has_key?(index)
    cached = node_cache[:non_surrogate][index]
    if cached
      node_cache[:non_surrogate][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  i1, s1 = index, []
  i2 = index
  r3 = _nt_DIGIT
  if r3
    r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
    r2 = r3
  else
    if (match_len = has_terminal?("a", :insens, index))
      r4 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"A"')
      r4 = nil
    end
    if r4
      r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
      r2 = r4
    else
      if (match_len = has_terminal?("b", :insens, index))
        r5 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        @index += match_len
      else
        terminal_parse_failure('"B"')
        r5 = nil
      end
      if r5
        r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
        r2 = r5
      else
        if (match_len = has_terminal?("c", :insens, index))
          r6 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          @index += match_len
        else
          terminal_parse_failure('"C"')
          r6 = nil
        end
        if r6
          r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
          r2 = r6
        else
          if (match_len = has_terminal?("e", :insens, index))
            r7 = instantiate_node(SyntaxNode,input, index...(index + match_len))
            @index += match_len
          else
            terminal_parse_failure('"E"')
            r7 = nil
          end
          if r7
            r7 = SyntaxNode.new(input, (index-1)...index) if r7 == true
            r2 = r7
          else
            if (match_len = has_terminal?("f", :insens, index))
              r8 = instantiate_node(SyntaxNode,input, index...(index + match_len))
              @index += match_len
            else
              terminal_parse_failure('"F"')
              r8 = nil
            end
            if r8
              r8 = SyntaxNode.new(input, (index-1)...index) if r8 == true
              r2 = r8
            else
              @index = i2
              r2 = nil
            end
          end
        end
      end
    end
  end
  s1 << r2
  if r2
    s9, i9 = [], index
    loop do
      r10 = _nt_HEXDIG
      if r10
        s9 << r10
      else
        break
      end
      if s9.size == 3
        break
      end
    end
    if s9.size < 3
      @index = i9
      r9 = nil
    else
      if s9.size < 3
        @terminal_failures.pop
      end
      r9 = instantiate_node(SyntaxNode,input, i9...index, s9)
    end
    s1 << r9
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(NonSurrogate0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    i11, s11 = index, []
    if (match_len = has_terminal?("d", :insens, index))
      r12 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"D"')
      r12 = nil
    end
    s11 << r12
    if r12
      r13 = _nt_ODIGIT
      s11 << r13
      if r13
        s14, i14 = [], index
        loop do
          r15 = _nt_HEXDIG
          if r15
            s14 << r15
          else
            break
          end
          if s14.size == 2
            break
          end
        end
        if s14.size < 2
          @index = i14
          r14 = nil
        else
          if s14.size < 2
            @terminal_failures.pop
          end
          r14 = instantiate_node(SyntaxNode,input, i14...index, s14)
        end
        s11 << r14
      end
    end
    if s11.last
      r11 = instantiate_node(SyntaxNode,input, i11...index, s11)
      r11.extend(NonSurrogate1)
    else
      @index = i11
      r11 = nil
    end
    if r11
      r11 = SyntaxNode.new(input, (index-1)...index) if r11 == true
      r0 = r11
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:non_surrogate][start_index] = r0

  r0
end

#_nt_OC ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 2068

def _nt_OC
  start_index = index
  if node_cache[:OC].has_key?(index)
    cached = node_cache[:OC][index]
    if cached
      node_cache[:OC][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i1, s1 = index, []
  if (match_len = has_terminal?(",", false, index))
    r2 = true
    @index += match_len
  else
    terminal_parse_failure('","')
    r2 = nil
  end
  s1 << r2
  if r2
    r3 = _nt_S
    s1 << r3
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(OC0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r0 = r1
  else
    r0 = instantiate_node(SyntaxNode,input, index...index)
  end

  node_cache[:OC][start_index] = r0

  r0
end

#_nt_ODIGIT ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3585

def _nt_ODIGIT
  start_index = index
  if node_cache[:ODIGIT].has_key?(index)
    cached = node_cache[:ODIGIT][index]
    if cached
      node_cache[:ODIGIT][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  if has_terminal?(@regexps[gr = '\A[0-7]'] ||= Regexp.new(gr), :regexp, index)
    r0 = instantiate_node(SyntaxNode,input, index...(index + 1))
    @index += 1
  else
    terminal_parse_failure('[0-7]')
    r0 = nil
  end

  node_cache[:ODIGIT][start_index] = r0

  r0
end

#_nt_S ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1962

def _nt_S
  start_index = index
  if node_cache[:S].has_key?(index)
    cached = node_cache[:S][index]
    if cached
      node_cache[:S][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  s1, i1 = [], index
  loop do
    r2 = _nt_blank
    if r2
      s1 << r2
    else
      break
    end
  end
  r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
  s0 << r1
  if r1
    s3, i3 = [], index
    loop do
      i4, s4 = index, []
      if (match_len = has_terminal?("/", false, index))
        r5 = true
        @index += match_len
      else
        terminal_parse_failure('"/"')
        r5 = nil
      end
      s4 << r5
      if r5
        s6, i6 = [], index
        loop do
          r7 = _nt_non_slash
          if r7
            s6 << r7
          else
            break
          end
        end
        r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
        s4 << r6
        if r6
          if (match_len = has_terminal?("/", false, index))
            r8 = true
            @index += match_len
          else
            terminal_parse_failure('"/"')
            r8 = nil
          end
          s4 << r8
          if r8
            s9, i9 = [], index
            loop do
              r10 = _nt_blank
              if r10
                s9 << r10
              else
                break
              end
            end
            r9 = instantiate_node(SyntaxNode,input, i9...index, s9)
            s4 << r9
          end
        end
      end
      if s4.last
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
        r4.extend(S0)
      else
        @index = i4
        r4 = nil
      end
      if r4
        s3 << r4
      else
        break
      end
    end
    r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    s0 << r3
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(S1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:S][start_index] = r0

  r0
end

#_nt_seq ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 65

def _nt_seq
  start_index = index
  if node_cache[:seq].has_key?(index)
    cached = node_cache[:seq][index]
    if cached
      node_cache[:seq][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_S
  s0 << r1
  if r1
    i3, s3 = index, []
    r4 = _nt_item
    s3 << r4
    if r4
      r5 = _nt_S
      s3 << r5
      if r5
        s6, i6 = [], index
        loop do
          i7, s7 = index, []
          if (match_len = has_terminal?(",", false, index))
            r8 = true
            @index += match_len
          else
            terminal_parse_failure('","')
            r8 = nil
          end
          s7 << r8
          if r8
            r9 = _nt_S
            s7 << r9
            if r9
              r10 = _nt_item
              s7 << r10
              if r10
                r11 = _nt_S
                s7 << r11
              end
            end
          end
          if s7.last
            r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
            r7.extend(Seq0)
          else
            @index = i7
            r7 = nil
          end
          if r7
            s6 << r7
          else
            break
          end
        end
        r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
        s3 << r6
        if r6
          r12 = _nt_OC
          s3 << r12
        end
      end
    end
    if s3.last
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      r3.extend(Seq1)
    else
      @index = i3
      r3 = nil
    end
    if r3
      r2 = r3
    else
      r2 = instantiate_node(SyntaxNode,input, index...index)
    end
    s0 << r2
    if r2
      r13 = _nt_S
      s0 << r13
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Seq2)
    r0.extend(Seq3)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:seq][start_index] = r0

  r0
end

#_nt_sign ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 249

def _nt_sign
  start_index = index
  if node_cache[:sign].has_key?(index)
    cached = node_cache[:sign][index]
    if cached
      node_cache[:sign][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  if (match_len = has_terminal?("+", false, index))
    r1 = true
    @index += match_len
  else
    terminal_parse_failure('"+"')
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("-", false, index))
      r2 = true
      @index += match_len
    else
      terminal_parse_failure('"-"')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:sign][start_index] = r0

  r0
end

#_nt_simple ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 841

def _nt_simple
  start_index = index
  if node_cache[:simple].has_key?(index)
    cached = node_cache[:simple][index]
    if cached
      node_cache[:simple][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  if (match_len = has_terminal?("false", false, index))
    r1 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    r1.extend(Simple0)
    @index += match_len
  else
    terminal_parse_failure('"false"')
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("true", false, index))
      r2 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      r2.extend(Simple1)
      @index += match_len
    else
      terminal_parse_failure('"true"')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      if (match_len = has_terminal?("null", false, index))
        r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        r3.extend(Simple2)
        @index += match_len
      else
        terminal_parse_failure('"null"')
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        if (match_len = has_terminal?("undefined", false, index))
          r4 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          r4.extend(Simple3)
          @index += match_len
        else
          terminal_parse_failure('"undefined"')
          r4 = nil
        end
        if r4
          r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
          r0 = r4
        else
          i5, s5 = index, []
          if (match_len = has_terminal?("simple(", false, index))
            r6 = instantiate_node(SyntaxNode,input, index...(index + match_len))
            @index += match_len
          else
            terminal_parse_failure('"simple("')
            r6 = nil
          end
          s5 << r6
          if r6
            r7 = _nt_S
            s5 << r7
            if r7
              r8 = _nt_item
              s5 << r8
              if r8
                r9 = _nt_S
                s5 << r9
                if r9
                  if (match_len = has_terminal?(")", false, index))
                    r10 = true
                    @index += match_len
                  else
                    terminal_parse_failure('")"')
                    r10 = nil
                  end
                  s5 << r10
                end
              end
            end
          end
          if s5.last
            r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
            r5.extend(Simple4)
            r5.extend(Simple5)
          else
            @index = i5
            r5 = nil
          end
          if r5
            r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
            r0 = r5
          else
            @index = i0
            r0 = nil
          end
        end
      end
    end
  end

  node_cache[:simple][start_index] = r0

  r0
end

#_nt_single_quoted ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 2640

def _nt_single_quoted
  start_index = index
  if node_cache[:single_quoted].has_key?(index)
    cached = node_cache[:single_quoted][index]
    if cached
      node_cache[:single_quoted][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_unescaped
  r1.extend(SingleQuoted0)
  r1.extend(SingleQuoted0)
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    r2 = _nt_DQUOTE
    r2.extend(SingleQuoted1)
    r2.extend(SingleQuoted1)
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      i3, s3 = index, []
      if (match_len = has_terminal?("\\", false, index))
        r4 = true
        @index += match_len
      else
        terminal_parse_failure('"\\\\"')
        r4 = nil
      end
      s3 << r4
      if r4
        if (match_len = has_terminal?("'", false, index))
          r5 = true
          @index += match_len
        else
          terminal_parse_failure('"\'"')
          r5 = nil
        end
        s3 << r5
      end
      if s3.last
        r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
        r3.extend(SingleQuoted2)
        r3.extend(SingleQuoted3)
      else
        @index = i3
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        i6, s6 = index, []
        if (match_len = has_terminal?("\\", false, index))
          r7 = true
          @index += match_len
        else
          terminal_parse_failure('"\\\\"')
          r7 = nil
        end
        s6 << r7
        if r7
          r8 = _nt_escapable
          s6 << r8
        end
        if s6.last
          r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
          r6.extend(SingleQuoted4)
          r6.extend(SingleQuoted5)
        else
          @index = i6
          r6 = nil
        end
        if r6
          r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
          r0 = r6
        else
          @index = i0
          r0 = nil
        end
      end
    end
  end

  node_cache[:single_quoted][start_index] = r0

  r0
end

#_nt_spec ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 2387

def _nt_spec
  start_index = index
  if node_cache[:spec].has_key?(index)
    cached = node_cache[:spec][index]
    if cached
      node_cache[:spec][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_S
  s0 << r1
  if r1
    i3, s3 = index, []
    if (match_len = has_terminal?("_", false, index))
      r4 = true
      @index += match_len
    else
      terminal_parse_failure('"_"')
      r4 = nil
    end
    s3 << r4
    if r4
      r5 = _nt_S
      s3 << r5
    end
    if s3.last
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      r3.extend(Spec0)
    else
      @index = i3
      r3 = nil
    end
    if r3
      r2 = r3
    else
      r2 = instantiate_node(SyntaxNode,input, index...index)
    end
    s0 << r2
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Spec1)
    r0.extend(Spec2)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:spec][start_index] = r0

  r0
end

#_nt_spec1 ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 2453

def _nt_spec1
  start_index = index
  if node_cache[:spec1].has_key?(index)
    cached = node_cache[:spec1][index]
    if cached
      node_cache[:spec1][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_S
  s0 << r1
  if r1
    if (match_len = has_terminal?("_", false, index))
      r2 = true
      @index += match_len
    else
      terminal_parse_failure('"_"')
      r2 = nil
    end
    s0 << r2
    if r2
      r3 = _nt_S
      s0 << r3
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Spec10)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:spec1][start_index] = r0

  r0
end

#_nt_sqstr ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1222

def _nt_sqstr
  start_index = index
  if node_cache[:sqstr].has_key?(index)
    cached = node_cache[:sqstr][index]
    if cached
      node_cache[:sqstr][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  if (match_len = has_terminal?("'", false, index))
    r1 = true
    @index += match_len
  else
    terminal_parse_failure('"\'"')
    r1 = nil
  end
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_single_quoted
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      if (match_len = has_terminal?("'", false, index))
        r4 = true
        @index += match_len
      else
        terminal_parse_failure('"\'"')
        r4 = nil
      end
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Sqstr0)
    r0.extend(Sqstr1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:sqstr][start_index] = r0

  r0
end

#_nt_streamstring ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 2176

def _nt_streamstring
  start_index = index
  if node_cache[:streamstring].has_key?(index)
    cached = node_cache[:streamstring][index]
    if cached
      node_cache[:streamstring][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  i1, s1 = index, []
  if (match_len = has_terminal?("(", false, index))
    r2 = true
    @index += match_len
  else
    terminal_parse_failure('"("')
    r2 = nil
  end
  s1 << r2
  if r2
    r3 = _nt_spec1
    s1 << r3
    if r3
      r4 = _nt_tstr
      s1 << r4
      if r4
        r5 = _nt_S
        s1 << r5
        if r5
          s6, i6 = [], index
          loop do
            i7, s7 = index, []
            if (match_len = has_terminal?(",", false, index))
              r8 = true
              @index += match_len
            else
              terminal_parse_failure('","')
              r8 = nil
            end
            s7 << r8
            if r8
              r9 = _nt_S
              s7 << r9
              if r9
                r10 = _nt_tstr
                s7 << r10
                if r10
                  r11 = _nt_S
                  s7 << r11
                end
              end
            end
            if s7.last
              r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
              r7.extend(Streamstring0)
            else
              @index = i7
              r7 = nil
            end
            if r7
              s6 << r7
            else
              break
            end
          end
          r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
          s1 << r6
          if r6
            r12 = _nt_OC
            s1 << r12
            if r12
              if (match_len = has_terminal?(")", false, index))
                r13 = true
                @index += match_len
              else
                terminal_parse_failure('")"')
                r13 = nil
              end
              s1 << r13
            end
          end
        end
      end
    end
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(Streamstring1)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    i14, s14 = index, []
    if (match_len = has_terminal?("(", false, index))
      r15 = true
      @index += match_len
    else
      terminal_parse_failure('"("')
      r15 = nil
    end
    s14 << r15
    if r15
      r16 = _nt_spec1
      s14 << r16
      if r16
        r17 = _nt_sqstr
        s14 << r17
        if r17
          r18 = _nt_S
          s14 << r18
          if r18
            s19, i19 = [], index
            loop do
              i20, s20 = index, []
              if (match_len = has_terminal?(",", false, index))
                r21 = true
                @index += match_len
              else
                terminal_parse_failure('","')
                r21 = nil
              end
              s20 << r21
              if r21
                r22 = _nt_S
                s20 << r22
                if r22
                  r23 = _nt_sqstr
                  s20 << r23
                  if r23
                    r24 = _nt_S
                    s20 << r24
                  end
                end
              end
              if s20.last
                r20 = instantiate_node(SyntaxNode,input, i20...index, s20)
                r20.extend(Streamstring2)
              else
                @index = i20
                r20 = nil
              end
              if r20
                s19 << r20
              else
                break
              end
            end
            r19 = instantiate_node(SyntaxNode,input, i19...index, s19)
            s14 << r19
            if r19
              r25 = _nt_OC
              s14 << r25
              if r25
                if (match_len = has_terminal?(")", false, index))
                  r26 = true
                  @index += match_len
                else
                  terminal_parse_failure('")"')
                  r26 = nil
                end
                s14 << r26
              end
            end
          end
        end
      end
    end
    if s14.last
      r14 = instantiate_node(SyntaxNode,input, i14...index, s14)
      r14.extend(Streamstring3)
    else
      @index = i14
      r14 = nil
    end
    if r14
      r14 = SyntaxNode.new(input, (index-1)...index) if r14 == true
      r0 = r14
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:streamstring][start_index] = r0

  r0
end

#_nt_tagged ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1049

def _nt_tagged
  start_index = index
  if node_cache[:tagged].has_key?(index)
    cached = node_cache[:tagged][index]
    if cached
      node_cache[:tagged][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_uint
  s0 << r1
  if r1
    if (match_len = has_terminal?("(", false, index))
      r2 = true
      @index += match_len
    else
      terminal_parse_failure('"("')
      r2 = nil
    end
    s0 << r2
    if r2
      r3 = _nt_S
      s0 << r3
      if r3
        r4 = _nt_item
        s0 << r4
        if r4
          r5 = _nt_S
          s0 << r5
          if r5
            if (match_len = has_terminal?(")", false, index))
              r6 = true
              @index += match_len
            else
              terminal_parse_failure('")"')
              r6 = nil
            end
            s0 << r6
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Tagged0)
    r0.extend(Tagged1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:tagged][start_index] = r0

  r0
end

#_nt_tstr ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 1327

def _nt_tstr
  start_index = index
  if node_cache[:tstr].has_key?(index)
    cached = node_cache[:tstr][index]
    if cached
      node_cache[:tstr][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  r1 = _nt_DQUOTE
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      r3 = _nt_double_quoted
      if r3
        s2 << r3
      else
        break
      end
    end
    r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
    s0 << r2
    if r2
      r4 = _nt_DQUOTE
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Tstr0)
    r0.extend(Tstr1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:tstr][start_index] = r0

  r0
end

#_nt_uint ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 964

def _nt_uint
  start_index = index
  if node_cache[:uint].has_key?(index)
    cached = node_cache[:uint][index]
    if cached
      node_cache[:uint][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  if (match_len = has_terminal?("0", false, index))
    r1 = true
    @index += match_len
  else
    terminal_parse_failure('"0"')
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    i2, s2 = index, []
    r3 = _nt_DIGIT1
    s2 << r3
    if r3
      s4, i4 = [], index
      loop do
        r5 = _nt_DIGIT
        if r5
          s4 << r5
        else
          break
        end
      end
      r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      s2 << r4
    end
    if s2.last
      r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
      r2.extend(Uint0)
    else
      @index = i2
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:uint][start_index] = r0

  r0
end

#_nt_unescaped ⇒ Object 



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# File 'lib/parser/edngrammar.rb', line 3421

def _nt_unescaped
  start_index = index
  if node_cache[:unescaped].has_key?(index)
    cached = node_cache[:unescaped][index]
    if cached
      node_cache[:unescaped][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  if (match_len = has_terminal?("\n", false, index))
    r1 = true
    @index += match_len
  else
    terminal_parse_failure('"\\n"')
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("\r", false, index))
      r2 = true
      @index += match_len
    else
      terminal_parse_failure('"\\r"')
      r2 = nil
    end
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      if has_terminal?(@regexps[gr = '\A[\\ -!]'] ||= Regexp.new(gr), :regexp, index)
        r3 = true
        @index += 1
      else
        terminal_parse_failure('[\\ -!]')
        r3 = nil
      end
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        if has_terminal?(@regexps[gr = '\A[\\#-&]'] ||= Regexp.new(gr), :regexp, index)
          r4 = true
          @index += 1
        else
          terminal_parse_failure('[\\#-&]')
          r4 = nil
        end
        if r4
          r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
          r0 = r4
        else
          if has_terminal?(@regexps[gr = '\A[\\(-\\[]'] ||= Regexp.new(gr), :regexp, index)
            r5 = true
            @index += 1
          else
            terminal_parse_failure('[\\(-\\[]')
            r5 = nil
          end
          if r5
            r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
            r0 = r5
          else
            if has_terminal?(@regexps[gr = '\A[\\]-􏿿]'] ||= Regexp.new(gr), :regexp, index)
              r6 = true
              @index += 1
            else
              terminal_parse_failure('[\\]-􏿿]')
              r6 = nil
            end
            if r6
              r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
              r0 = r6
            else
              @index = i0
              r0 = nil
            end
          end
        end
      end
    end
  end

  node_cache[:unescaped][start_index] = r0

  r0
end

#root ⇒ Object 



8
9
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# File 'lib/parser/edngrammar.rb', line 8

def root
  @root ||= :seq
end