Comment by ryancox

Go also has a builtin yacc implementation: https://golang.org/cmd/yacc/

  It is largely transliterated from the Inferno version
  written in Limbo which in turn was largely transliterated 
  from the Plan 9 version written in C and documented at 
  http://plan9.bell-labs.com/magic/man2html/1/yacc

For a real example in action, see the mtail project: https://github.com/google/mtail/blob/master/vm/compiler.go