# File lib/dbus/type.rb, line 121 def <<(a) if not [STRUCT, ARRAY, DICT_ENTRY].member?(@sigtype) raise SignatureException end raise SignatureException if @sigtype == ARRAY and @members.size > 0 if @sigtype == DICT_ENTRY if @members.size == 2 raise SignatureException, "Dict entries have exactly two members" end if @members.size == 0 if [STRUCT, ARRAY, DICT_ENTRY].member?(a.sigtype) raise SignatureException, "Dict entry keys must be basic types" end end end @members << a end