Module: Musicality::Parsing::Key

Includes:
Pitch, Treetop::Runtime
Included in:
KeyParser
Defined in:
lib/musicality/notation/parsing/key_parsing.rb

Defined Under Namespace

Modules: Key0, Key1

Instance Method Summary collapse

Methods included from Pitch

#_nt_cent, #_nt_letter_a, #_nt_letter_b, #_nt_letter_c, #_nt_letter_d, #_nt_letter_e, #_nt_letter_f, #_nt_letter_g, #_nt_octave, #_nt_pitch, #_nt_pitch_letter

Methods included from NonnegativeInteger

#_nt_nonnegative_integer

Instance Method Details

#_nt_key ⇒ Object 



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# File 'lib/musicality/notation/parsing/key_parsing.rb', line 51

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

  i0, s0 = index, []
  r1 = _nt_pitch_letter
  s0 << r1
  if r1
    if has_terminal?(@regexps[gr = '\A[#b]'] ||= Regexp.new(gr), :regexp, index)
      r3 = true
      @index += 1
    else
      terminal_parse_failure('[#b]')
      r3 = nil
    end
    if r3
      r2 = r3
    else
      r2 = instantiate_node(SyntaxNode,input, index...index)
    end
    s0 << r2
    if r2
      r4 = _nt_major_minor
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(Key0)
    r0.extend(Key1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:key][start_index] = r0

  r0
end

#_nt_major_minor ⇒ Object 



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# File 'lib/musicality/notation/parsing/key_parsing.rb', line 98

def _nt_major_minor
  start_index = index
  if node_cache[:major_minor].has_key?(index)
    cached = node_cache[:major_minor][index]
    if cached
      node_cache[:major_minor][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?("maj", false, index))
    r1 = instantiate_node(SyntaxNode,input, index...(index + match_len))
    @index += match_len
  else
    terminal_parse_failure('"maj"')
    r1 = nil
  end
  if r1
    r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
    r0 = r1
  else
    if (match_len = has_terminal?("min", false, index))
      r2 = instantiate_node(SyntaxNode,input, index...(index + match_len))
      @index += match_len
    else
      terminal_parse_failure('"min"')
      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[:major_minor][start_index] = r0

  r0
end

#root ⇒ Object 



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

def root
  @root ||= :key
end