A program which takes a formal description of a grammar (e.g. in BNF) and outputs source code for a parser which will recognise valid strings obeying that grammar and perform associated actions. Unix' s yacc is a well known example.

In addition suitable contents:
[ = ] [ al ] [ am ] [ an ] [ ar ] [ arc ] [ as ] [ at ] [ B ] [ b ] [ be ] [ BNF ] [ cc ] [ ch ] [ ci ] [ co ] [ code ] [ cr ] [ de ] [ du ] [ ec ] [ ed ] [ er ] [ es ] [ fi ] [ file ] [ fo ] [ for ] [ gn ] [ gr ] [ grammar ] [ gs ] [ h ] [ hat ] [ hr ] [ id ] [ il ] [ in ] [ io ] [ is ] [ ke ] [ kn ] [ Lex ] [ li ] [ ma ] [ mm ] [ mo ] [ mod ] [ module ] [ mp ] [ N ] [ na ] [ ng ] [ ni ] [ no ] [ ns ] [ output ] [ pa ] [ parser ] [ pe ] [ perf ] [ ph ] [ pl ] [ pr ] [ program ] [ pt ] [ query ] [ rc ] [ re ] [ ro ] [ sc ] [ script ] [ se ] [ so ] [ source ] [ source code ] [ st ] [ string ] [ th ] [ tp ] [ tr ] [ va ] [ yacc ]