def _nt_obs_references
start_index = index
if node_cache[:obs_references].has_key?(index)
cached = node_cache[:obs_references][index]
@index = cached.interval.end if cached
return cached
end
i0, s0 = index, []
if has_terminal?("References", false, index)
r1 = instantiate_node(SyntaxNode,input, index...(index + 10))
@index += 10
else
terminal_parse_failure("References")
r1 = nil
end
s0 << r1
if r1
s2, i2 = [], index
loop do
r3 = _nt_WSP
if r3
s2 << r3
else
break
end
end
r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
s0 << r2
if r2
if has_terminal?(":", false, index)
r4 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure(":")
r4 = nil
end
s0 << r4
if r4
s5, i5 = [], index
loop do
i6 = index
r7 = _nt_phrase
if r7
r6 = r7
else
r8 = _nt_msg_id
if r8
r6 = r8
else
@index = i6
r6 = nil
end
end
if r6
s5 << r6
else
break
end
end
r5 = instantiate_node(SyntaxNode,input, i5...index, s5)
s0 << r5
if r5
r9 = _nt_CRLF
s0 << r9
end
end
end
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(ObsReferences0)
else
@index = i0
r0 = nil
end
node_cache[:obs_references][start_index] = r0
r0
end