def _nt_obs_FWS
start_index = index
if node_cache[:obs_FWS].has_key?(index)
cached = node_cache[:obs_FWS][index]
@index = cached.interval.end if cached
return cached
end
i0, s0 = index, []
s1, i1 = [], index
loop do
r2 = _nt_WSP
if r2
s1 << r2
else
break
end
end
if s1.empty?
@index = i1
r1 = nil
else
r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
end
s0 << r1
if r1
s3, i3 = [], index
loop do
i4, s4 = index, []
r5 = _nt_CRLF
s4 << r5
if r5
s6, i6 = [], index
loop do
r7 = _nt_WSP
if r7
s6 << r7
else
break
end
end
if s6.empty?
@index = i6
r6 = nil
else
r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
end
s4 << r6
end
if s4.last
r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
r4.extend(ObsFWS0)
else
@index = i4
r4 = nil
end
if r4
s3 << r4
else
break
end
end
r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
s0 << r3
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(ObsFWS1)
else
@index = i0
r0 = nil
end
node_cache[:obs_FWS][start_index] = r0
r0
end