Module: Music::Transcription::Parsing::PositiveRational
Defined Under Namespace
Modules: PositiveRational0, PositiveRational1
Instance Method Summary
collapse
#_nt_positive_integer
#_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
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#root ⇒ Object
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# File 'lib/music-transcription/parsing/numbers/positive_rational_parsing.rb', line 11
def root
@root ||= :positive_rational
end
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