# Autogenerated from a Treetop grammar. Edits may be lost.


module Music
module Transcription
module Parsing

module Link
  include Treetop::Runtime

  def root
    @root ||= :link
  end

  include Pitch

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

    i0 = index
    r1 = _nt_slur_link
    if r1
      r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
      r0 = r1
    else
      r2 = _nt_tie
      if r2
        r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
        r0 = r2
      else
        r3 = _nt_legato_link
        if r3
          r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
          r0 = r3
        else
          r4 = _nt_glissando
          if r4
            r4 = SyntaxNode.new(input, (index-1)...index) if r4 == true
            r0 = r4
          else
            r5 = _nt_portamento
            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[:link][start_index] = r0

    r0
  end

  module SlurLink0
    def target
      elements[1]
    end
  end

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

    i0, s0 = index, []
    if (match_len = has_terminal?("=", false, index))
      r1 = true
      @index += match_len
    else
      terminal_parse_failure("=")
      r1 = nil
    end
    s0 << r1
    if r1
      r2 = _nt_pitch
      s0 << r2
    end
    if s0.last
      r0 = instantiate_node(SlurNode,input, i0...index, s0)
      r0.extend(SlurLink0)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:slur_link][start_index] = r0

    r0
  end

  def _nt_tie
    start_index = index
    if node_cache[:tie].has_key?(index)
      cached = node_cache[:tie][index]
      if cached
        node_cache[:tie][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(TieNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure("=")
      r0 = nil
    end

    node_cache[:tie][start_index] = r0

    r0
  end

  module LegatoLink0
    def target
      elements[1]
    end
  end

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

    i0, s0 = index, []
    if (match_len = has_terminal?("|", false, index))
      r1 = true
      @index += match_len
    else
      terminal_parse_failure("|")
      r1 = nil
    end
    s0 << r1
    if r1
      r2 = _nt_pitch
      s0 << r2
    end
    if s0.last
      r0 = instantiate_node(LegatoNode,input, i0...index, s0)
      r0.extend(LegatoLink0)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:legato_link][start_index] = r0

    r0
  end

  module Glissando0
    def target
      elements[1]
    end
  end

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

    i0, s0 = index, []
    if (match_len = has_terminal?("~", false, index))
      r1 = true
      @index += match_len
    else
      terminal_parse_failure("~")
      r1 = nil
    end
    s0 << r1
    if r1
      r2 = _nt_pitch
      s0 << r2
    end
    if s0.last
      r0 = instantiate_node(GlissandoNode,input, i0...index, s0)
      r0.extend(Glissando0)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:glissando][start_index] = r0

    r0
  end

  module Portamento0
    def target
      elements[1]
    end
  end

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

    i0, s0 = index, []
    if (match_len = has_terminal?("/", false, index))
      r1 = true
      @index += match_len
    else
      terminal_parse_failure("/")
      r1 = nil
    end
    s0 << r1
    if r1
      r2 = _nt_pitch
      s0 << r2
    end
    if s0.last
      r0 = instantiate_node(PortamentoNode,input, i0...index, s0)
      r0.extend(Portamento0)
    else
      @index = i0
      r0 = nil
    end

    node_cache[:portamento][start_index] = r0

    r0
  end

end

class LinkParser < Treetop::Runtime::CompiledParser
  include Link
end


end
end
end