I have some (probably trivial) questions about parsers:

1. Are most programming languages designed to be implementable using lex and 
yacc?

2. If so, are their designs restricted by this?

3. If so, is the fact that most languages disallow "a<b<c" due to this?

4. Could that be added to OCaml? ;-)

5. Is it productive to think in terms of coercing lex and yacc into doing as 
much of the work as possible and then using postprocessing to do the rest 
(e.g. this is the way I'd implement a<b<c)?

Cheers,
Jon.

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