Module: Music::Transcription::Parsing::PositiveRational

Includes:
PositiveInteger, Treetop::Runtime
Included in:
PositiveRationalParser, Tempo
Defined in:
lib/music-transcription/parsing/numbers/positive_rational_parsing.rb

Defined Under Namespace

Modules: PositiveRational0, PositiveRational1

Instance Method Summary collapse

Methods included from PositiveInteger

#_nt_positive_integer

Methods included from NonnegativeInteger

#_nt_nonnegative_integer

Instance Method Details

#_nt_positive_rational ⇒ Object 



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# File 'lib/music-transcription/parsing/numbers/positive_rational_parsing.rb', line 35

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

  i0, s0 = index, []
  r1 = _nt_positive_integer
  s0 << r1
  if r1
    if (match_len = has_terminal?("/", false, index))
      r2 = true
      @index += match_len
    else
      terminal_parse_failure("/")
      r2 = nil
    end
    s0 << r2
    if r2
      r3 = _nt_positive_integer
      s0 << r3
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(PositiveRational0)
    r0.extend(PositiveRational1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:positive_rational][start_index] = r0

  r0
end

#root ⇒ Object 



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# File 'lib/music-transcription/parsing/numbers/positive_rational_parsing.rb', line 11

def root
  @root ||= :positive_rational
end