# File lib/mail/parsers/rfc2822_obsolete.rb, line 593 def _nt_obs_month start_index = index if node_cache[:obs_month].has_key?(index) cached = node_cache[:obs_month][index] @index = cached.interval.end if cached return cached end i0, s0 = index, [] r1 = _nt_CFWS s0 << r1 if r1 r2 = _nt_month_name s0 << r2 if r2 r3 = _nt_CFWS s0 << r3 end end if s0.last r0 = instantiate_node(SyntaxNode,input, i0...index, s0) r0.extend(ObsMonth0) else @index = i0 r0 = nil end node_cache[:obs_month][start_index] = r0 r0 end