def _nt_named_label
start_index = index
if node_cache[:named_label].has_key?(index)
cached = node_cache[:named_label][index]
if cached
node_cache[:named_label][index] = cached = SyntaxNode.new(input, index...(index + 1)) if cached == true
@index = cached.interval.end
end
return cached
end
i0, s0 = index, []
i1, s1 = index, []
r2 = _nt_alpha_char
s1 << r2
if r2
s3, i3 = [], index
loop do
r4 = _nt_alphanumeric_char
if r4
s3 << r4
else
break
end
end
r3 = instantiate_node(SyntaxNode,input, i3...index, s3)
s1 << r3
end
if s1.last
r1 = instantiate_node(SyntaxNode,input, i1...index, s1)
r1.extend(NamedLabel0)
else
@index = i1
r1 = nil
end
s0 << r1
if r1
if (match_len = has_terminal?(':', false, index))
r5 = true
@index += match_len
else
terminal_parse_failure('\':\'')
r5 = nil
end
s0 << r5
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(NamedLabel1)
r0.extend(NamedLabel2)
else
@index = i0
r0 = nil
end
node_cache[:named_label][start_index] = r0
r0
end