def _nt_sequence_primary
start_index = index
if node_cache[:sequence_primary].has_key?(index)
cached = node_cache[:sequence_primary][index]
@index = cached.interval.end if cached
return cached
end
i0 = index
i1, s1 = index, []
r2 = _nt_prefix
s1 << r2
if r2
r3 = _nt_atomic
s1 << r3
end
if s1.last
r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
r1.extend(SequencePrimary0)
r1.extend(SequencePrimary1)
else
self.index = i1
r1 = nil
end
if r1
r0 = r1
else
i4, s4 = index, []
r5 = _nt_atomic
s4 << r5
if r5
r6 = _nt_suffix
s4 << r6
end
if s4.last
r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
r4.extend(SequencePrimary2)
r4.extend(SequencePrimary3)
else
self.index = i4
r4 = nil
end
if r4
r0 = r4
else
r7 = _nt_atomic
if r7
r0 = r7
else
self.index = i0
r0 = nil
end
end
end
node_cache[:sequence_primary][start_index] = r0
return r0
end