def _nt_day_of_week
start_index = index
if node_cache[:day_of_week].has_key?(index)
cached = node_cache[:day_of_week][index]
if cached
cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0 = index
i1, s1 = index, []
r3 = _nt_FWS
if r3
r2 = r3
else
r2 = instantiate_node(SyntaxNode,input, index...index)
end
s1 << r2
if r2
r4 = _nt_day_name
s1 << r4
end
if s1.last
r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
r1.extend(DayOfWeek0)
else
@index = i1
r1 = nil
end
if r1
r0 = r1
else
r5 = _nt_obs_day_of_week
if r5
r0 = r5
else
@index = i0
r0 = nil
end
end
node_cache[:day_of_week][start_index] = r0
r0
end