def _nt_repetition_suffix
start_index = index
if node_cache[:repetition_suffix].has_key?(index)
cached = node_cache[:repetition_suffix][index]
if cached
node_cache[:repetition_suffix][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?('+', false, index))
r1 = instantiate_node(OneOrMore,input, index...(index + match_len))
@index += match_len
else
terminal_parse_failure('\'+\'')
r1 = nil
end
if r1
r1 = SyntaxNode.new(input, (index-1)...index) if r1 == true
r0 = r1
else
if (match_len = has_terminal?('*', false, index))
r2 = instantiate_node(ZeroOrMore,input, index...(index + match_len))
@index += match_len
else
terminal_parse_failure('\'*\'')
r2 = nil
end
if r2
r2 = SyntaxNode.new(input, (index-1)...index) if r2 == true
r0 = r2
else
r3 = _nt_occurrence_range
if r3
r3 = SyntaxNode.new(input, (index-1)...index) if r3 == true
r0 = r3
else
@index = i0
r0 = nil
end
end
end
node_cache[:repetition_suffix][start_index] = r0
r0
end