def _nt_day
start_index = index
if node_cache[:day].has_key?(index)
cached = node_cache[:day][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_DIGIT
s1 << r4
if r4
r6 = _nt_DIGIT
if r6
r5 = r6
else
r5 = instantiate_node(SyntaxNode,input, index...index)
end
s1 << r5
end
end
if s1.last
r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
r1.extend(Day0)
else
@index = i1
r1 = nil
end
if r1
r0 = r1
else
r7 = _nt_obs_day
if r7
r0 = r7
else
@index = i0
r0 = nil
end
end
node_cache[:day][start_index] = r0
r0
end