def _nt_obs_phrase_list
start_index = index
if node_cache[:obs_phrase_list].has_key?(index)
cached = node_cache[:obs_phrase_list][index]
@index = cached.interval.end if cached
return cached
end
i0 = index
r1 = _nt_phrase
if r1
r0 = r1
else
i2, s2 = index, []
s3, i3 = [], index
loop do
i4, s4 = index, []
r6 = _nt_phrase
if r6
r5 = r6
else
r5 = instantiate_node(SyntaxNode,input, index...index)
end
s4 << r5
if r5
r8 = _nt_CFWS
if r8
r7 = r8
else
r7 = instantiate_node(SyntaxNode,input, index...index)
end
s4 << r7
if r7
if has_terminal?(",", false, index)
r9 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure(",")
r9 = nil
end
s4 << r9
if r9
r11 = _nt_CFWS
if r11
r10 = r11
else
r10 = instantiate_node(SyntaxNode,input, index...index)
end
s4 << r10
end
end
end
if s4.last
r4 = instantiate_node(SyntaxNode,input, i4...index, s4)
r4.extend(ObsPhraseList0)
else
@index = i4
r4 = nil
end
if r4
s3 << r4
else
break
end
end
if s3.empty?
@index = i3
r3 = nil
else
r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
end
s2 << r3
if r3
r13 = _nt_phrase
if r13
r12 = r13
else
r12 = instantiate_node(SyntaxNode,input, index...index)
end
s2 << r12
end
if s2.last
r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
r2.extend(ObsPhraseList1)
else
@index = i2
r2 = nil
end
if r2
r0 = r2
else
@index = i0
r0 = nil
end
end
node_cache[:obs_phrase_list][start_index] = r0
r0
end