def _nt_tag
start_index = index
if node_cache[:tag].has_key?(index)
cached = node_cache[:tag][index]
@index = cached.interval.end if cached
return cached
end
i0, s0 = index, []
if has_terminal?('@', false, index)
r1 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
terminal_parse_failure('@')
r1 = nil
end
s0 << r1
if r1
s2, i2 = [], index
loop do
if has_terminal?('\G[^@\\r\\n\\t ]', true, index)
r3 = true
@index += 1
else
r3 = nil
end
if r3
s2 << r3
else
break
end
end
if s2.empty?
@index = i2
r2 = nil
else
r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
end
s0 << r2
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(Tag0)
else
@index = i0
r0 = nil
end
node_cache[:tag][start_index] = r0
r0
end