def _nt_obs_qp
start_index = index
if node_cache[:obs_qp].has_key?(index)
cached = node_cache[:obs_qp][index]
if cached
cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0, s0 = index, []
if has_terminal?("\\", false, index)
r1 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure("\\")
r1 = nil
end
s0 << r1
if r1
if has_terminal?('\G[\\x00-\\x7F]', true, index)
r2 = true
@index += 1
else
r2 = nil
end
s0 << r2
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(ObsQp0)
else
@index = i0
r0 = nil
end
node_cache[:obs_qp][start_index] = r0
r0
end