def _nt_grammar_name
start_index = index
if node_cache[:grammar_name].has_key?(index)
cached = node_cache[:grammar_name][index]
@index = cached.interval.end if cached
return cached
end
i0, s0 = index, []
if input.index(Regexp.new('[A-Z]'), index) == index
r1 = instantiate_node(SyntaxNode,input, index...(index + 1))
@index += 1
else
r1 = nil
end
s0 << r1
if r1
s2, i2 = [], index
loop do
r3 = _nt_alphanumeric_char
if r3
s2 << r3
else
break
end
end
r2 = instantiate_node(SyntaxNode,input, i2...index, s2)
s0 << r2
end
if s0.last
r0 = instantiate_node(SyntaxNode,input, i0...index, s0)
r0.extend(GrammarName0)
else
self.index = i0
r0 = nil
end
node_cache[:grammar_name][start_index] = r0
return r0
end