# File lib/treetop/compiler/metagrammar.rb, line 1158 def _nt_alternative start_index = index if node_cache[:alternative].has_key?(index) cached = node_cache[:alternative][index] if cached cached = SyntaxNode.new(input, index...(index + 1)) if cached == true @index = cached.interval.end end return cached end i0 = index r1 = _nt_sequence if r1 r0 = r1 else r2 = _nt_primary if r2 r0 = r2 else @index = i0 r0 = nil end end node_cache[:alternative][start_index] = r0 r0 end