Module: EDNGRAMMAR

Includes:: Treetop::Runtime

Included in:: EDNGRAMMARParser

Defined in:: lib/parser/edngrammar.rb

Defined Under Namespace

Modules: AppPrefix0, AppPrefix1, AppString0, AppString1, Array0, Array1, Array2, Array3, Array4, Binint0, Binint1, Comment0, Comment1, Decnumber0, Decnumber1, Decnumber2, Decnumber3, Decnumber4, Decnumber5, DoubleQuoted0, DoubleQuoted1, DoubleQuoted2, DoubleQuoted3, DoubleQuoted4, DoubleQuoted5, Ellipsis0, Embedded0, Embedded1, Escapable0, Escapable1, Escapable2, Escapable3, Escapable4, Escapable5, Escapable6, Escapable7, Escapable8, Hexchar0, Hexchar1, Hexchar2, Hexchar3, Hexchar4, Hexchar5, Hexfloat0, Hexfloat1, Hexfloat2, Hexfloat3, Hexfloat4, Hexint0, Hexint1, Hexscalar0, Hexscalar1, HighSurrogate0, HighSurrogate1, Keyp0, Keyp1, LowSurrogate0, LowSurrogate1, MS0, MSC0, MSC1, MSC2, Map0, Map1, Map2, Map3, Map4, NonSurrogate0, NonSurrogate1, Nonfin0, Nonfin1, Nonfin2, Number0, Number1, Octint0, Octint1, S0, S1, SOC0, SOC1, Seq0, Seq1, Seq2, Seq3, Simple0, Simple1, Simple2, Simple3, Simple4, Simple5, SingleQuoted0, SingleQuoted1, SingleQuoted2, SingleQuoted3, SingleQuoted4, SingleQuoted5, Spec0, Spec1, Specms0, Specms1, Sqstr0, Sqstr1, Streamstring0, Streamstring1, Streamstring2, String0, String1, String10, String11, String2, Tagged0, Tagged1, Tstr0, Tstr1, Uint0

Instance Method Summary collapse

Instance Method Details

#_nt_app_prefix ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1609

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 = index
  i1, s1 = index, []
  r2 = _nt_lcalpha
  s1 << r2
  if r2
    s3, i3 = [], index
    loop do
      r4 = _nt_lcalnum
      if r4
        s3 << r4
      else
        break
      end
    end
    r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    s1 << r3
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(AppPrefix0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    i5, s5 = index, []
    r6 = _nt_ucalpha
    s5 << r6
    if r6
      s7, i7 = [], index
      loop do
        r8 = _nt_ucalnum
        if r8
          s7 << r8
        else
          break
        end
      end
      r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
      s5 << r7
    end
    if s5.last
      r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
      r5.extend(AppPrefix1)
    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

  node_cache[:app_prefix][start_index] = r0

  r0
end

#_nt_app_string ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1711

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`

# File 'lib/parser/edngrammar.rb', line 2034

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
    i2 = index
    i3, s3 = index, []
    r4 = _nt_specms
    s3 << r4
    if r4
      r5 = _nt_S
      s3 << r5
      if r5
        r6 = _nt_item
        s3 << r6
        if r6
          s7, i7 = [], index
          loop do
            i8, s8 = index, []
            r9 = _nt_MSC
            s8 << r9
            if r9
              r10 = _nt_item
              s8 << r10
            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)
          s3 << r7
          if r7
            r11 = _nt_SOC
            s3 << r11
          end
        end
      end
    end
    if s3.last
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      r3.extend(Array1)
    else
      @index = i3
      r3 = nil
    end
    if r3
      r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
      r2 = r3
    else
      i12, s12 = index, []
      r13 = _nt_spec
      s12 << r13
      if r13
        r14 = _nt_S
        s12 << r14
      end
      if s12.last
        r12 = instantiate_node(SyntaxNode,input, i12...index, s12)
        r12.extend(Array2)
      else
        @index = i12
        r12 = nil
      end
      if r12
        r12 = SyntaxNode.new(input, (index-1)...index) if r12 == true
        r2 = r12
      else
        @index = i2
        r2 = nil
      end
    end
    s0 << r2
    if r2
      if (match_len = has_terminal?("]", false, index))
        r15 = true
        @index += match_len
      else
        terminal_parse_failure('"]"')
        r15 = nil
      end
      s0 << r15
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Array3)
    r0.extend(Array4)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:array][start_index] = r0

  r0
end

#_nt_BDIGIT ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4663

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_binint ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1149

def _nt_binint
  start_index = index
  if node_cache[:binint].has_key?(index)
    cached = node_cache[:binint][index]
    if cached
      node_cache[:binint][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?("0b", :insens, index))
      r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"0b"')
      r3 = nil
    end
    s0 << r3
    if r3
      s4, i4 = [], index
      loop do
        r5 = _nt_BDIGIT
        if r5
          s4 << r5
        else
          break
        end
      end
      if s4.empty?
        @index = i4
        r4 = nil
      else
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      end
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Binint0)
    r0.extend(Binint1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:binint][start_index] = r0

  r0
end

#_nt_blank ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 2417

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`

# File 'lib/parser/edngrammar.rb', line 1804

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
      r3 = _nt_embedded
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        @index = i0
        r0 = nil
      end
    end
  end

  node_cache[:bstr][start_index] = r0

  r0
end

#_nt_comment ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 2621

def _nt_comment
  start_index = index
  if node_cache[:comment].has_key?(index)
    cached = node_cache[:comment][index]
    if cached
      node_cache[:comment][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
    s3, i3 = [], index
    loop do
      r4 = _nt_non_slash
      if r4
        s3 << r4
      else
        break
      end
    end
    r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    s1 << r3
    if r3
      if (match_len = has_terminal?("/", false, index))
        r5 = true
        @index += match_len
      else
        terminal_parse_failure('"/"')
        r5 = nil
      end
      s1 << r5
    end
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(Comment0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  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
      s8, i8 = [], index
      loop do
        r9 = _nt_non_lf
        if r9
          s8 << r9
        else
          break
        end
      end
      r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
      s6 << r8
      if r8
        if (match_len = has_terminal?("\n", false, index))
          r10 = true
          @index += match_len
        else
          terminal_parse_failure('"\\n"')
          r10 = nil
        end
        s6 << r10
      end
    end
    if s6.last
      r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
      r6.extend(Comment1)
    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

  node_cache[:comment][start_index] = r0

  r0
end

#_nt_decnumber ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 604

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
    i3 = index
    i4, s4 = index, []
    s5, i5 = [], index
    loop do
      r6 = _nt_DIGIT
      if r6
        s5 << r6
      else
        break
      end
    end
    if s5.empty?
      @index = i5
      r5 = nil
    else
      r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
    end
    s4 << r5
    if r5
      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
        s10, i10 = [], index
        loop do
          r11 = _nt_DIGIT
          if r11
            s10 << r11
          else
            break
          end
        end
        r10 = instantiate_node(SyntaxNode,input, i10...index, s10)
        s8 << r10
      end
      if s8.last
        r8 = instantiate_node(SyntaxNode,input, i8...index, s8)
        r8.extend(Decnumber0)
      else
        @index = i8
        r8 = nil
      end
      if r8
        r7 = r8
      else
        r7 = instantiate_node(SyntaxNode,input, index...index)
      end
      s4 << r7
    end
    if s4.last
      r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      r4.extend(Decnumber1)
    else
      @index = i4
      r4 = nil
    end
    if r4
      r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
      r3 = r4
    else
      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_DIGIT
          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(Decnumber2)
      else
        @index = i12
        r12 = nil
      end
      if r12
        r12 = SyntaxNode.new(input, (index-1)...index) if r12 == true
        r3 = r12
      else
        @index = i3
        r3 = nil
      end
    end
    s0 << r3
    if r3
      i17, s17 = index, []
      if (match_len = has_terminal?("e", :insens, index))
        r18 = instantiate_node(SyntaxNode,input, index...(index + match_len))
        @index += match_len
      else
        terminal_parse_failure('"e"')
        r18 = nil
      end
      s17 << r18
      if r18
        r20 = _nt_sign
        if r20
          r19 = r20
        else
          r19 = instantiate_node(SyntaxNode,input, index...index)
        end
        s17 << r19
        if r19
          s21, i21 = [], index
          loop do
            r22 = _nt_DIGIT
            if r22
              s21 << r22
            else
              break
            end
          end
          if s21.empty?
            @index = i21
            r21 = nil
          else
            r21 = instantiate_node(SyntaxNode,input, i21...index, s21)
          end
          s17 << r21
        end
      end
      if s17.last
        r17 = instantiate_node(SyntaxNode,input, i17...index, s17)
        r17.extend(Decnumber3)
      else
        @index = i17
        r17 = nil
      end
      if r17
        r16 = r17
      else
        r16 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r16
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Decnumber4)
    r0.extend(Decnumber5)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:decnumber][start_index] = r0

  r0
end

#_nt_DIGIT ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4591

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`

# File 'lib/parser/edngrammar.rb', line 4615

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`

# File 'lib/parser/edngrammar.rb', line 3304

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
    r2 = _nt_SQUOTE
    r2.extend(DoubleQuoted1)
    r2.extend(DoubleQuoted1)
    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`

# File 'lib/parser/edngrammar.rb', line 4543

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_ellipsis ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 289

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

  s0, i0 = [], index
  loop do
    if (match_len = has_terminal?(".", false, index))
      r1 = true
      @index += match_len
    else
      terminal_parse_failure('"."')
      r1 = nil
    end
    if r1
      s0 << r1
    else
      break
    end
  end
  if s0.size < 3
    @index = i0
    r0 = nil
  else
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Ellipsis0)
    r0.extend(Ellipsis0)
  end

  node_cache[:ellipsis][start_index] = r0

  r0
end

#_nt_embedded ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1921

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`

# File 'lib/parser/edngrammar.rb', line 3546

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`

# File 'lib/parser/edngrammar.rb', line 3713

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
  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
    i3 = index
    i4, s4 = index, []
    s5, i5 = [], index
    loop do
      if (match_len = has_terminal?("0", false, index))
        r6 = true
        @index += match_len
      else
        terminal_parse_failure('"0"')
        r6 = nil
      end
      if r6
        s5 << r6
      else
        break
      end
    end
    if s5.empty?
      @index = i5
      r5 = nil
    else
      r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
    end
    s4 << r5
    if r5
      r8 = _nt_hexscalar
      if r8
        r7 = r8
      else
        r7 = instantiate_node(SyntaxNode,input, index...index)
      end
      s4 << r7
    end
    if s4.last
      r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      r4.extend(Hexchar0)
    else
      @index = i4
      r4 = nil
    end
    if r4
      r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
      r3 = r4
    else
      r9 = _nt_hexscalar
      if r9
        r9 = SyntaxNode.new(input, (index-1)...index) if r9 == true
        r3 = r9
      else
        @index = i3
        r3 = nil
      end
    end
    s1 << r3
    if r3
      if (match_len = has_terminal?("}", false, index))
        r10 = true
        @index += match_len
      else
        terminal_parse_failure('"}"')
        r10 = nil
      end
      s1 << r10
    end
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(Hexchar1)
    r1.extend(Hexchar2)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    r11 = _nt_non_surrogate
    r11.extend(Hexchar3)
    r11.extend(Hexchar3)
    if r11
      r11 = SyntaxNode.new(input, (index-1)...index) if r11 == true
      r0 = r11
    else
      i12, s12 = index, []
      r13 = _nt_high_surrogate
      s12 << r13
      if r13
        if (match_len = has_terminal?("\\", false, index))
          r14 = true
          @index += match_len
        else
          terminal_parse_failure('"\\\\"')
          r14 = nil
        end
        s12 << r14
        if r14
          if (match_len = has_terminal?("u", false, index))
            r15 = true
            @index += match_len
          else
            terminal_parse_failure('"u"')
            r15 = nil
          end
          s12 << r15
          if r15
            r16 = _nt_low_surrogate
            s12 << r16
          end
        end
      end
      if s12.last
        r12 = instantiate_node(SyntaxNode,input, i12...index, s12)
        r12.extend(Hexchar4)
        r12.extend(Hexchar5)
      else
        @index = i12
        r12 = nil
      end
      if r12
        r12 = SyntaxNode.new(input, (index-1)...index) if r12 == true
        r0 = r12
      else
        @index = i0
        r0 = nil
      end
    end
  end

  node_cache[:hexchar][start_index] = r0

  r0
end

#_nt_HEXDIG ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4687

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_HEXDIG1 ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4785

def _nt_HEXDIG1
  start_index = index
  if node_cache[:HEXDIG1].has_key?(index)
    cached = node_cache[:HEXDIG1][index]
    if cached
      node_cache[:HEXDIG1][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_DIGIT1
  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[:HEXDIG1][start_index] = r0

  r0
end

#_nt_hexfloat ⇒ `Object`

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

def _nt_hexfloat
  start_index = index
  if node_cache[:hexfloat].has_key?(index)
    cached = node_cache[:hexfloat][index]
    if cached
      node_cache[:hexfloat][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?("0x", :insens, index))
      r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"0x"')
      r3 = nil
    end
    s0 << r3
    if r3
      i4 = index
      i5, s5 = index, []
      s6, i6 = [], index
      loop do
        r7 = _nt_HEXDIG
        if r7
          s6 << r7
        else
          break
        end
      end
      if s6.empty?
        @index = i6
        r6 = nil
      else
        r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
      end
      s5 << r6
      if r6
        i9, s9 = index, []
        if (match_len = has_terminal?(".", false, index))
          r10 = true
          @index += match_len
        else
          terminal_parse_failure('"."')
          r10 = nil
        end
        s9 << r10
        if r10
          s11, i11 = [], index
          loop do
            r12 = _nt_HEXDIG
            if r12
              s11 << r12
            else
              break
            end
          end
          r11 = instantiate_node(SyntaxNode,input, i11...index, s11)
          s9 << r11
        end
        if s9.last
          r9 = instantiate_node(SyntaxNode,input, i9...index, s9)
          r9.extend(Hexfloat0)
        else
          @index = i9
          r9 = nil
        end
        if r9
          r8 = r9
        else
          r8 = instantiate_node(SyntaxNode,input, index...index)
        end
        s5 << r8
      end
      if s5.last
        r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
        r5.extend(Hexfloat1)
      else
        @index = i5
        r5 = nil
      end
      if r5
        r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
        r4 = r5
      else
        i13, s13 = index, []
        if (match_len = has_terminal?(".", false, index))
          r14 = true
          @index += match_len
        else
          terminal_parse_failure('"."')
          r14 = nil
        end
        s13 << r14
        if r14
          s15, i15 = [], index
          loop do
            r16 = _nt_HEXDIG
            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
          s13 << r15
        end
        if s13.last
          r13 = instantiate_node(SyntaxNode,input, i13...index, s13)
          r13.extend(Hexfloat2)
        else
          @index = i13
          r13 = nil
        end
        if r13
          r13 = SyntaxNode.new(input, (index-1)...index) if r13 == true
          r4 = r13
        else
          @index = i4
          r4 = nil
        end
      end
      s0 << r4
      if r4
        if (match_len = has_terminal?("p", :insens, index))
          r17 = instantiate_node(SyntaxNode,input, index...(index + match_len))
          @index += match_len
        else
          terminal_parse_failure('"p"')
          r17 = nil
        end
        s0 << r17
        if r17
          r19 = _nt_sign
          if r19
            r18 = r19
          else
            r18 = instantiate_node(SyntaxNode,input, index...index)
          end
          s0 << r18
          if r18
            s20, i20 = [], index
            loop do
              r21 = _nt_DIGIT
              if r21
                s20 << r21
              else
                break
              end
            end
            if s20.empty?
              @index = i20
              r20 = nil
            else
              r20 = instantiate_node(SyntaxNode,input, i20...index, s20)
            end
            s0 << r20
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Hexfloat3)
    r0.extend(Hexfloat4)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:hexfloat][start_index] = r0

  r0
end

#_nt_hexint ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1013

def _nt_hexint
  start_index = index
  if node_cache[:hexint].has_key?(index)
    cached = node_cache[:hexint][index]
    if cached
      node_cache[:hexint][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?("0x", :insens, index))
      r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"0x"')
      r3 = nil
    end
    s0 << r3
    if r3
      s4, i4 = [], index
      loop do
        r5 = _nt_HEXDIG
        if r5
          s4 << r5
        else
          break
        end
      end
      if s4.empty?
        @index = i4
        r4 = nil
      else
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      end
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Hexint0)
    r0.extend(Hexint1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:hexint][start_index] = r0

  r0
end

#_nt_hexscalar ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4303

def _nt_hexscalar
  start_index = index
  if node_cache[:hexscalar].has_key?(index)
    cached = node_cache[:hexscalar][index]
    if cached
      node_cache[:hexscalar][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?("10", false, index))
    r2 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    @index += match_len
  else
    terminal_parse_failure('"10"')
    r2 = nil
  end
  s1 << r2
  if r2
    s3, i3 = [], index
    loop do
      r4 = _nt_HEXDIG
      if r4
        s3 << r4
      else
        break
      end
      if s3.size == 4
        break
      end
    end
    if s3.size < 4
      @index = i3
      r3 = nil
    else
      if s3.size < 4
        @terminal_failures.pop
      end
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    end
    s1 << r3
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(Hexscalar0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    i5, s5 = index, []
    r6 = _nt_HEXDIG1
    s5 << r6
    if r6
      s7, i7 = [], index
      loop do
        r8 = _nt_HEXDIG
        if r8
          s7 << r8
        else
          break
        end
        if s7.size == 4
          break
        end
      end
      if s7.size < 4
        @index = i7
        r7 = nil
      else
        if s7.size < 4
          @terminal_failures.pop
        end
        r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
      end
      s5 << r7
    end
    if s5.last
      r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
      r5.extend(Hexscalar1)
    else
      @index = i5
      r5 = nil
    end
    if r5
      r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
      r0 = r5
    else
      r9 = _nt_non_surrogate
      if r9
        r9 = SyntaxNode.new(input, (index-1)...index) if r9 == true
        r0 = r9
      else
        s10, i10 = [], index
        loop do
          r11 = _nt_HEXDIG
          if r11
            s10 << r11
          else
            break
          end
          if s10.size == 3
            break
          end
        end
        if s10.size < 1
          @index = i10
          r10 = nil
        else
          if s10.size < 3
            @terminal_failures.pop
          end
          r10 = instantiate_node(SyntaxNode,input, i10...index, s10)
        end
        if r10
          r10 = SyntaxNode.new(input, (index-1)...index) if r10 == true
          r0 = r10
        else
          @index = i0
          r0 = nil
        end
      end
    end
  end

  node_cache[:hexscalar][start_index] = r0

  r0
end

#_nt_high_surrogate ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4062

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_item ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 130

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_number
        if r4
          r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
          r0 = r4
        else
          r5 = _nt_simple
          if r5
            r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
            r0 = r5
          else
            r6 = _nt_string
            if r6
              r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
              r0 = r6
            else
              r7 = _nt_streamstring
              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[:item][start_index] = r0

  r0
end

#_nt_keyp ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 2367

def _nt_keyp
  start_index = index
  if node_cache[:keyp].has_key?(index)
    cached = node_cache[:keyp][index]
    if cached
      node_cache[:keyp][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(Keyp0)
    r0.extend(Keyp1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:keyp][start_index] = r0

  r0
end

#_nt_lcalnum ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4907

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`

# File 'lib/parser/edngrammar.rb', line 4883

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`

# File 'lib/parser/edngrammar.rb', line 4181

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`

# File 'lib/parser/edngrammar.rb', line 2221

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
    i2 = index
    i3, s3 = index, []
    r4 = _nt_specms
    s3 << r4
    if r4
      r5 = _nt_S
      s3 << r5
      if r5
        r6 = _nt_keyp
        s3 << r6
        if r6
          s7, i7 = [], index
          loop do
            i8, s8 = index, []
            r9 = _nt_MSC
            s8 << r9
            if r9
              r10 = _nt_keyp
              s8 << r10
            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)
          s3 << r7
          if r7
            r11 = _nt_SOC
            s3 << r11
          end
        end
      end
    end
    if s3.last
      r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
      r3.extend(Map1)
    else
      @index = i3
      r3 = nil
    end
    if r3
      r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
      r2 = r3
    else
      i12, s12 = index, []
      r13 = _nt_spec
      s12 << r13
      if r13
        r14 = _nt_S
        s12 << r14
      end
      if s12.last
        r12 = instantiate_node(SyntaxNode,input, i12...index, s12)
        r12.extend(Map2)
      else
        @index = i12
        r12 = nil
      end
      if r12
        r12 = SyntaxNode.new(input, (index-1)...index) if r12 == true
        r2 = r12
      else
        @index = i2
        r2 = nil
      end
    end
    s0 << r2
    if r2
      if (match_len = has_terminal?("}", false, index))
        r15 = true
        @index += match_len
      else
        terminal_parse_failure('"}"')
        r15 = nil
      end
      s0 << r15
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Map3)
    r0.extend(Map4)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:map][start_index] = r0

  r0
end

#_nt_MS ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 2816

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

  i0, s0 = index, []
  i1 = index
  r2 = _nt_blank
  if r2
    r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
    r1 = r2
  else
    r3 = _nt_comment
    if r3
      r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
      r1 = r3
    else
      @index = i1
      r1 = nil
    end
  end
  s0 << r1
  if r1
    r4 = _nt_S
    s0 << r4
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(MS0)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:MS][start_index] = r0

  r0
end

#_nt_MSC ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 2880

def _nt_MSC
  start_index = index
  if node_cache[:MSC].has_key?(index)
    cached = node_cache[:MSC][index]
    if cached
      node_cache[:MSC][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_S
    s1 << r3
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(MSC0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    i4, s4 = index, []
    r5 = _nt_MS
    s4 << r5
    if r5
      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
      end
      if s7.last
        r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
        r7.extend(MSC1)
      else
        @index = i7
        r7 = nil
      end
      if r7
        r6 = r7
      else
        r6 = instantiate_node(SyntaxNode,input, index...index)
      end
      s4 << r6
    end
    if s4.last
      r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      r4.extend(MSC2)
    else
      @index = i4
      r4 = nil
    end
    if r4
      r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
      r0 = r4
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:MSC][start_index] = r0

  r0
end

#_nt_non_lf ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 2547

def _nt_non_lf
  start_index = index
  if node_cache[:non_lf].has_key?(index)
    cached = node_cache[:non_lf][index]
    if cached
      node_cache[:non_lf][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?("\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
          @index = i0
          r0 = nil
        end
      end
    end
  end

  node_cache[:non_lf][start_index] = r0

  r0
end

#_nt_non_slash ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 2485

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
        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
          @index = i0
          r0 = nil
        end
      end
    end
  end

  node_cache[:non_slash][start_index] = r0

  r0
end

#_nt_non_surrogate ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 3879

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_nonfin ⇒ `Object`

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

def _nt_nonfin
  start_index = index
  if node_cache[:nonfin].has_key?(index)
    cached = node_cache[:nonfin][index]
    if cached
      node_cache[:nonfin][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(Nonfin0)
    @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(Nonfin1)
      @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(Nonfin2)
        @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[:nonfin][start_index] = r0

  r0
end

#_nt_number ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 461

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

  i0, s0 = index, []
  i1 = index
  r2 = _nt_hexfloat
  if r2
    r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
    r1 = r2
  else
    r3 = _nt_hexint
    if r3
      r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
      r1 = r3
    else
      r4 = _nt_octint
      if r4
        r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
        r1 = r4
      else
        r5 = _nt_binint
        if r5
          r5 = SyntaxNode.new(input, (index-1)...index) if r5 == true
          r1 = r5
        else
          r6 = _nt_decnumber
          if r6
            r6 = SyntaxNode.new(input, (index-1)...index) if r6 == true
            r1 = r6
          else
            r7 = _nt_nonfin
            if r7
              r7 = SyntaxNode.new(input, (index-1)...index) if r7 == true
              r1 = r7
            else
              @index = i1
              r1 = nil
            end
          end
        end
      end
    end
  end
  s0 << r1
  if r1
    r8 = _nt_spec
    s0 << r8
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Number0)
    r0.extend(Number1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:number][start_index] = r0

  r0
end

#_nt_octint ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1081

def _nt_octint
  start_index = index
  if node_cache[:octint].has_key?(index)
    cached = node_cache[:octint][index]
    if cached
      node_cache[:octint][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?("0o", :insens, index))
      r3 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"0o"')
      r3 = nil
    end
    s0 << r3
    if r3
      s4, i4 = [], index
      loop do
        r5 = _nt_ODIGIT
        if r5
          s4 << r5
        else
          break
        end
      end
      if s4.empty?
        @index = i4
        r4 = nil
      else
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
      end
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Octint0)
    r0.extend(Octint1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:octint][start_index] = r0

  r0
end

#_nt_ODIGIT ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4639

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`

# File 'lib/parser/edngrammar.rb', line 2739

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, []
      r5 = _nt_comment
      s4 << r5
      if r5
        s6, i6 = [], index
        loop do
          r7 = _nt_blank
          if r7
            s6 << r7
          else
            break
          end
        end
        r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
        s4 << r6
      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`

# File 'lib/parser/edngrammar.rb', line 54

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
      s5, i5 = [], index
      loop do
        i6, s6 = index, []
        r7 = _nt_MSC
        s6 << r7
        if r7
          r8 = _nt_item
          s6 << r8
        end
        if s6.last
          r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
          r6.extend(Seq0)
        else
          @index = i6
          r6 = nil
        end
        if r6
          s5 << r6
        else
          break
        end
      end
      r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
      s3 << r5
      if r5
        r9 = _nt_SOC
        s3 << r9
      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
  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`

# File 'lib/parser/edngrammar.rb', line 531

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`

# File 'lib/parser/edngrammar.rb', line 1316

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`

# File 'lib/parser/edngrammar.rb', line 3420

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
        r5 = _nt_SQUOTE
        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_SOC ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 2981

def _nt_SOC
  start_index = index
  if node_cache[:SOC].has_key?(index)
    cached = node_cache[:SOC][index]
    if cached
      node_cache[:SOC][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(SOC0)
    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(SOC1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:SOC][start_index] = r0

  r0
end

#_nt_spec ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 3160

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

  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
    s3, i3 = [], index
    loop do
      r4 = _nt_wordchar
      if r4
        s3 << r4
      else
        break
      end
    end
    r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    s1 << r3
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(Spec0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r0 = r1
  else
    r0 = instantiate_node(SyntaxNode,input, index...index)
  end

  node_cache[:spec][start_index] = r0

  r0
end

#_nt_specms ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 3221

def _nt_specms
  start_index = index
  if node_cache[:specms].has_key?(index)
    cached = node_cache[:specms][index]
    if cached
      node_cache[:specms][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
    s3, i3 = [], index
    loop do
      r4 = _nt_wordchar
      if r4
        s3 << r4
      else
        break
      end
    end
    r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
    s1 << r3
    if r3
      r5 = _nt_MS
      s1 << r5
    end
  end
  if s1.last
    r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
    r1.extend(Specms0)
  else
    @index = i1
    r1 = nil
  end
  if r1
    r0 = r1
  else
    r0 = instantiate_node(SyntaxNode,input, index...index)
  end

  node_cache[:specms][start_index] = r0

  r0
end

#_nt_sqstr ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1759

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, []
  r1 = _nt_SQUOTE
  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
      r4 = _nt_SQUOTE
      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_SQUOTE ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4567

def _nt_SQUOTE
  start_index = index
  if node_cache[:SQUOTE].has_key?(index)
    cached = node_cache[:SQUOTE][index]
    if cached
      node_cache[:SQUOTE][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[:SQUOTE][start_index] = r0

  r0
end

#_nt_streamstring ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 3071

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, 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_MS
    s0 << r2
    if r2
      r3 = _nt_string
      s0 << r3
      if r3
        s4, i4 = [], index
        loop do
          i5, s5 = index, []
          r6 = _nt_MSC
          s5 << r6
          if r6
            r7 = _nt_string
            s5 << r7
          end
          if s5.last
            r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
            r5.extend(Streamstring0)
          else
            @index = i5
            r5 = nil
          end
          if r5
            s4 << r5
          else
            break
          end
        end
        r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
        s0 << r4
        if r4
          r8 = _nt_SOC
          s0 << r8
          if r8
            if (match_len = has_terminal?(")", false, index))
              r9 = true
              @index += match_len
            else
              terminal_parse_failure('")"')
              r9 = nil
            end
            s0 << r9
          end
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Streamstring1)
    r0.extend(Streamstring2)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:streamstring][start_index] = r0

  r0
end

#_nt_string ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 375

def _nt_string
  start_index = index
  if node_cache[:string].has_key?(index)
    cached = node_cache[:string][index]
    if cached
      node_cache[: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_string1e
  s0 << r1
  if r1
    s2, i2 = [], index
    loop do
      i3, s3 = index, []
      r4 = _nt_S
      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
        if r5
          r6 = _nt_S
          s3 << r6
          if r6
            r7 = _nt_string1e
            s3 << r7
          end
        end
      end
      if s3.last
        r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
        r3.extend(String0)
      else
        @index = i3
        r3 = nil
      end
      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(String1)
    r0.extend(String2)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:string][start_index] = r0

  r0
end

#_nt_string1 ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 207

def _nt_string1
  start_index = index
  if node_cache[:string1].has_key?(index)
    cached = node_cache[:string1][index]
    if cached
      node_cache[:string1][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0, s0 = index, []
  i1 = index
  r2 = _nt_tstr
  if r2
    r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
    r1 = r2
  else
    r3 = _nt_bstr
    if r3
      r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
      r1 = r3
    else
      @index = i1
      r1 = nil
    end
  end
  s0 << r1
  if r1
    r4 = _nt_spec
    s0 << r4
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(String10)
    r0.extend(String11)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:string1][start_index] = r0

  r0
end

#_nt_string1e ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 253

def _nt_string1e
  start_index = index
  if node_cache[:string1e].has_key?(index)
    cached = node_cache[:string1e][index]
    if cached
      node_cache[:string1e][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
      @index = cached.interval.end
    end
    return cached
  end

  i0 = index
  r1 = _nt_string1
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    r2 = _nt_ellipsis
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:string1e][start_index] = r0

  r0
end

#_nt_tagged ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1531

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
    r2 = _nt_spec
    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
          if r5
            r6 = _nt_S
            s0 << r6
            if r6
              if (match_len = has_terminal?(")", false, index))
                r7 = true
                @index += match_len
              else
                terminal_parse_failure('")"')
                r7 = nil
              end
              s0 << r7
            end
          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`

# File 'lib/parser/edngrammar.rb', line 1858

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_ucalnum ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4963

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

  i0 = index
  r1 = _nt_ucalpha
  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[:ucalnum][start_index] = r0

  r0
end

#_nt_ucalpha ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4939

def _nt_ucalpha
  start_index = index
  if node_cache[:ucalpha].has_key?(index)
    cached = node_cache[:ucalpha][index]
    if cached
      node_cache[:ucalpha][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[:ucalpha][start_index] = r0

  r0
end

#_nt_uint ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 1439

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`

# File 'lib/parser/edngrammar.rb', line 4439

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
              if has_terminal?(@regexps[gr = '\A[-􏿿]'] ||= Regexp.new(gr), :regexp, index)
                r7 = true
                @index += 1
              else
                terminal_parse_failure('[-􏿿]')
                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[:unescaped][start_index] = r0

  r0
end

#_nt_wordchar ⇒ `Object`

# File 'lib/parser/edngrammar.rb', line 4995

def _nt_wordchar
  start_index = index
  if node_cache[:wordchar].has_key?(index)
    cached = node_cache[:wordchar][index]
    if cached
      node_cache[:wordchar][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
    r2 = _nt_lcalnum
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      r3 = _nt_ucalpha
      if r3
        r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
        r0 = r3
      else
        @index = i0
        r0 = nil
      end
    end
  end

  node_cache[:wordchar][start_index] = r0

  r0
end

#root ⇒ `Object`



8
9
10

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

def root
  @root ||= :seq
end

Module: EDNGRAMMAR

Defined Under Namespace

Instance Method Summary collapse

Instance Method Details

#_nt_app_prefix ⇒ Object

#_nt_app_string ⇒ Object

#_nt_array ⇒ Object

#_nt_BDIGIT ⇒ Object

#_nt_binint ⇒ Object

#_nt_blank ⇒ Object

#_nt_bstr ⇒ Object

#_nt_comment ⇒ Object

#_nt_decnumber ⇒ Object

#_nt_DIGIT ⇒ Object

#_nt_DIGIT1 ⇒ Object

#_nt_double_quoted ⇒ Object

#_nt_DQUOTE ⇒ Object

#_nt_ellipsis ⇒ Object

#_nt_embedded ⇒ Object

#_nt_escapable ⇒ Object

#_nt_hexchar ⇒ Object

#_nt_HEXDIG ⇒ Object

#_nt_HEXDIG1 ⇒ Object

#_nt_hexfloat ⇒ Object

#_nt_hexint ⇒ Object

#_nt_hexscalar ⇒ Object

#_nt_high_surrogate ⇒ Object

#_nt_item ⇒ Object

#_nt_keyp ⇒ Object

#_nt_lcalnum ⇒ Object

#_nt_lcalpha ⇒ Object

#_nt_low_surrogate ⇒ Object

#_nt_map ⇒ Object

#_nt_MS ⇒ Object

#_nt_MSC ⇒ Object

#_nt_non_lf ⇒ Object

#_nt_non_slash ⇒ Object

#_nt_non_surrogate ⇒ Object

#_nt_nonfin ⇒ Object

#_nt_number ⇒ Object

#_nt_octint ⇒ Object

#_nt_ODIGIT ⇒ Object

#_nt_S ⇒ Object

#_nt_seq ⇒ Object

#_nt_sign ⇒ Object

#_nt_simple ⇒ Object

#_nt_single_quoted ⇒ Object

#_nt_SOC ⇒ Object

#_nt_spec ⇒ Object

#_nt_specms ⇒ Object

#_nt_sqstr ⇒ Object

#_nt_SQUOTE ⇒ Object

#_nt_streamstring ⇒ Object

#_nt_string ⇒ Object

#_nt_string1 ⇒ Object

#_nt_string1e ⇒ Object

#_nt_tagged ⇒ Object

#_nt_tstr ⇒ Object

#_nt_ucalnum ⇒ Object

#_nt_ucalpha ⇒ Object

#_nt_uint ⇒ Object

#_nt_unescaped ⇒ Object

#_nt_wordchar ⇒ Object

#root ⇒ Object

#_nt_app_prefix ⇒ `Object`

#_nt_app_string ⇒ `Object`

#_nt_array ⇒ `Object`

#_nt_BDIGIT ⇒ `Object`

#_nt_binint ⇒ `Object`

#_nt_blank ⇒ `Object`

#_nt_bstr ⇒ `Object`

#_nt_comment ⇒ `Object`

#_nt_decnumber ⇒ `Object`

#_nt_DIGIT ⇒ `Object`

#_nt_DIGIT1 ⇒ `Object`

#_nt_double_quoted ⇒ `Object`

#_nt_DQUOTE ⇒ `Object`

#_nt_ellipsis ⇒ `Object`

#_nt_embedded ⇒ `Object`

#_nt_escapable ⇒ `Object`

#_nt_hexchar ⇒ `Object`

#_nt_HEXDIG ⇒ `Object`

#_nt_HEXDIG1 ⇒ `Object`

#_nt_hexfloat ⇒ `Object`

#_nt_hexint ⇒ `Object`

#_nt_hexscalar ⇒ `Object`

#_nt_high_surrogate ⇒ `Object`

#_nt_item ⇒ `Object`

#_nt_keyp ⇒ `Object`

#_nt_lcalnum ⇒ `Object`

#_nt_lcalpha ⇒ `Object`

#_nt_low_surrogate ⇒ `Object`

#_nt_map ⇒ `Object`

#_nt_MS ⇒ `Object`

#_nt_MSC ⇒ `Object`

#_nt_non_lf ⇒ `Object`

#_nt_non_slash ⇒ `Object`

#_nt_non_surrogate ⇒ `Object`

#_nt_nonfin ⇒ `Object`

#_nt_number ⇒ `Object`

#_nt_octint ⇒ `Object`

#_nt_ODIGIT ⇒ `Object`

#_nt_S ⇒ `Object`

#_nt_seq ⇒ `Object`

#_nt_sign ⇒ `Object`

#_nt_simple ⇒ `Object`

#_nt_single_quoted ⇒ `Object`

#_nt_SOC ⇒ `Object`

#_nt_spec ⇒ `Object`

#_nt_specms ⇒ `Object`

#_nt_sqstr ⇒ `Object`

#_nt_SQUOTE ⇒ `Object`

#_nt_streamstring ⇒ `Object`

#_nt_string ⇒ `Object`

#_nt_string1 ⇒ `Object`

#_nt_string1e ⇒ `Object`

#_nt_tagged ⇒ `Object`

#_nt_tstr ⇒ `Object`

#_nt_ucalnum ⇒ `Object`

#_nt_ucalpha ⇒ `Object`

#_nt_uint ⇒ `Object`

#_nt_unescaped ⇒ `Object`

#_nt_wordchar ⇒ `Object`

#root ⇒ `Object`