For syntax errors, check out: http://research.swtch.com/yyerror http://research.swtch.com/yyerror It's not "AI" but I think it's a much more practical approach

For syntax errors, check out: http://research.swtch.com/yyerror http://research.swtch.com/yyerror It's not "AI" but I think it's a much more practical approach that any parser could implement, with enough work and feedback. I haven't used Go enough to know if this technique makes a qualitative difference on the friendliness of error messages. Interested to hear opinions.