Module: Musicality::Parsing::Meter

Includes:
PositiveInteger, Treetop::Runtime
Included in:
MeterParser
Defined in:
lib/musicality/notation/parsing/meter_parsing.rb

Defined Under Namespace

Modules: Meter10, Meter11, Meter20, Meter21

Instance Method Summary collapse

Methods included from PositiveInteger

#_nt_positive_integer

Methods included from NonnegativeInteger

#_nt_nonnegative_integer

Instance Method Details

#_nt_meter ⇒ Object 



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# File 'lib/musicality/notation/parsing/meter_parsing.rb', line 16

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

  i0 = index
  r1 = _nt_meter1
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    r2 = _nt_meter2
    if r2
      r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
      r0 = r2
    else
      @index = i0
      r0 = nil
    end
  end

  node_cache[:meter][start_index] = r0

  r0
end

#_nt_meter1 ⇒ Object 



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# File 'lib/musicality/notation/parsing/meter_parsing.rb', line 64

def _nt_meter1
  start_index = index
  if node_cache[:meter1].has_key?(index)
    cached = node_cache[:meter1][index]
    if cached
      node_cache[:meter1][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(Meter10)
    r0.extend(Meter11)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:meter1][start_index] = r0

  r0
end

#_nt_meter2 ⇒ Object 



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# File 'lib/musicality/notation/parsing/meter_parsing.rb', line 126

def _nt_meter2
  start_index = index
  if node_cache[:meter2].has_key?(index)
    cached = node_cache[:meter2][index]
    if cached
      node_cache[:meter2][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
      if r3
        if (match_len = has_terminal?("/", false, index))
          r4 = true
          @index += match_len
        else
          terminal_parse_failure('"/"')
          r4 = nil
        end
        s0 << r4
        if r4
          r5 = _nt_positive_integer
          s0 << r5
        end
      end
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Meter20)
    r0.extend(Meter21)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:meter2][start_index] = r0

  r0
end

#root ⇒ Object 



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# File 'lib/musicality/notation/parsing/meter_parsing.rb', line 10

def root
  @root ||= :meter
end