def _nt_feature_sub
start_index = index
if node_cache[:feature_sub].has_key?(index)
cached = node_cache[:feature_sub][index]
@index = cached.interval.end if cached
return cached
end
i0, s0 = index, []
r1 = _nt_white
s0 << r1
if r1
r2 = _nt_comment
s0 << r2
if r2
r3 = _nt_white
s0 << r3
if r3
r4 = _nt_tags
s0 << r4
if r4
r5 = _nt_white
s0 << r5
if r5
s6, i6 = [], index
loop do
i7, s7 = index, []
i8 = index
i9 = index
r10 = _nt_scenario_outline
if r10
r9 = r10
else
r11 = _nt_scenario
if r11
r9 = r11
else
r12 = _nt_background
if r12
r9 = r12
else
@index = i9
r9 = nil
end
end
end
if r9
r8 = nil
else
@index = i8
r8 = instantiate_node(SyntaxNode,input, index...index)
end
s7 << r8
if r8
if index < input_length
r13 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure("any character")
r13 = nil
end
s7 << r13
end
if s7.last
r7 = instantiate_node(SyntaxNode,input, i7...index, s7)
r7.extend(FeatureSub0)
else
@index = i7
r7 = nil
end
if r7
s6 << r7
else
break
end
end
r6 = instantiate_node(SyntaxNode,input, i6...index, s6)
s0 << r6
if r6
r15 = _nt_background
if r15
r14 = r15
else
r14 = instantiate_node(SyntaxNode,input, index...index)
end
s0 << r14
if r14
r16 = _nt_feature_elements
s0 << r16
if r16
r18 = _nt_comment
if r18
r17 = r18
else
r17 = instantiate_node(SyntaxNode,input, index...index)
end
s0 << r17
end
end
end
end
end
end
end
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(FeatureSub1)
r0.extend(FeatureSub2)
else
@index = i0
r0 = nil
end
node_cache[:feature_sub][start_index] = r0
r0
end