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# File 'lib/biodiversity/parser/scientific_name_dirty.rb', line 918
def _nt_double_year
start_index = index
if node_cache[:double_year].has_key?(index)
cached = node_cache[:double_year][index]
if cached
node_cache[:double_year][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0, s0 = index, []
r1 = _nt_year_number
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
s3, i3 = [], index
loop do
if has_terminal?(@regexps[gr = '\A[0-9]'] ||= Regexp.new(gr), :regexp, index)
r4 = true
@index += 1
else
terminal_parse_failure('[0-9]')
r4 = nil
end
if r4
s3 << r4
else
break
end
end
if s3.empty?
@index = i3
r3 = nil
else
r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
end
s0 << r3
if r3
if has_terminal?(@regexps[gr = '\A[A-Za-z]'] ||= Regexp.new(gr), :regexp, index)
r6 = true
@index += 1
else
terminal_parse_failure('[A-Za-z]')
r6 = nil
end
if r6
r5 = r6
else
r5 = instantiate_node(SyntaxNode,input, index...index)
end
s0 << r5
if r5
if has_terminal?(@regexps[gr = '\A[\\?]'] ||= Regexp.new(gr), :regexp, index)
r8 = true
@index += 1
else
terminal_parse_failure('[\\?]')
r8 = nil
end
if r8
r7 = r8
else
r7 = instantiate_node(SyntaxNode,input, index...index)
end
s0 << r7
end
end
end
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(DoubleYear0)
r0.extend(DoubleYear1)
else
@index = i0
r0 = nil
end
node_cache[:double_year][start_index] = r0
r0
end
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