# File lib/treetop/compiler/metagrammar.rb, line 3070 def _nt_white start_index = index if node_cache[:white].has_key?(index) cached = node_cache[:white][index] @index = cached.interval.end if cached return cached end if input.index(Regexp.new('[ \\t\\n\\r]'), index) == index r0 = instantiate_node(SyntaxNode,input, index...(index + 1)) @index += 1 else r0 = nil end node_cache[:white][start_index] = r0 return r0 end