If you want exuberant ctags to recognize Thrift, add this to your ~/.ctags:

--langdef=thrift
--langmap=thrift:.thrift
--regex-thrift=/^[ \t]*struct[ \t]*([a-zA-Z0-9_]+)/\1/c,classes/
--regex-thrift=/^[ \t]*enum[ \t]*([a-zA-Z0-9_]+)/\1/T,types/
--regex-thrift=/^[ \t]*[a-zA-Z0-9_<>\.]+[ \t]*([a-zA-Z0-9_]+)\(/\1/m,methods/
--regex-thrift=/^[ \t]*([A-Z0-9_]+)[ \t]*=/\1/C,constants/