module Musicality::Parsing::PositiveInteger

Public Instance Methods

_nt_positive_integer() click to toggle source
# File lib/musicality/notation/parsing/numbers/positive_integer_parsing.rb, line 27
def _nt_positive_integer
  start_index = index
  if node_cache[:positive_integer].has_key?(index)
    cached = node_cache[:positive_integer][index]
    if cached
      node_cache[:positive_integer][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
    if has_terminal?(@regexps[gr = '\A[0]'] ||= Regexp.new(gr), :regexp, index)
      r2 = true
      @index += 1
    else
      terminal_parse_failure('[0]')
      r2 = nil
    end
    if r2
      s1 << r2
    else
      break
    end
  end
  r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
  s0 << r1
  if r1
    if has_terminal?(@regexps[gr = '\A[1-9]'] ||= Regexp.new(gr), :regexp, index)
      r3 = true
      @index += 1
    else
      terminal_parse_failure('[1-9]')
      r3 = nil
    end
    s0 << r3
    if r3
      r5 = _nt_nonnegative_integer
      if r5
        r4 = r5
      else
        r4 = instantiate_node(SyntaxNode,input, index...index)
      end
      s0 << r4
    end
  end
  if s0.last
    r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
    r0.extend(PositiveInteger0)
    r0.extend(PositiveInteger1)
  else
    @index = i0
    r0 = nil
  end

  node_cache[:positive_integer][start_index] = r0

  r0
end
root() click to toggle source
# File lib/musicality/notation/parsing/numbers/positive_integer_parsing.rb, line 10
def root
  @root ||= :positive_integer
end