# File lib/treetop/compiler/metagrammar.rb, line 3053 def _nt_alpha_char start_index = index if node_cache[:alpha_char].has_key?(index) cached = node_cache[:alpha_char][index] @index = cached.interval.end if cached return cached end if has_terminal?('\G[A-Za-z_]', true, index) next_character = index + input[index..-1].match(/\A(.)/um).end(1) r0 = instantiate_node(SyntaxNode, input, index...next_character) @index = next_character else r0 = nil end node_cache[:alpha_char][start_index] = r0 r0 end