I recollect using lex/bison for writing compiler for COBOL on mainframe using SAS/C to list variable names in COBOL programs (remember Y2K!). Later in life used

I recollect using lex/bison for writing compiler for COBOL on mainframe using SAS/C to list variable names in COBOL programs (remember Y2K!). Later in life used ANTLR do something fun in Java. Never thought of comparing them. They both have their best part. If you are coming from Lex, Bison world - you will understand the philosophy behind ANTLR. But there is little more learning curve with ANTLR. Felt it is slightly complicated.