Re: Go on using Ml-lex

Sorry, I should have provided a little more motivation for my 
questions.

In an ML-lex file I have a named expression r which refers to a 
previously defined named expression r0.  r0 is referenced by placing 
its name in curly brackets.  I am adding the hyphen to a named set 
of characters.

  r = ({r0}|[-]);

This declaration was accepted by ML-lex, but is rejected by ML-ulex 
when in ML-lex mode, with the message:

  [/mnt/home/smlnj/110.67/bin/ml-ulex --ml-lex-mode translator/oasis.lex]
  [ml-ulex: parsing]
  170: syntax error: deleting  BAR LB RBD

Clearly I could write "-" instead of [-], and indeed this avoids the 
error message, but I simply fall into further more mysterious 
new errors.

I have not found a list of ML-lex/ML-ulex differences either on the 
SML/NJ site or on Google.

I have tried backing off to 110.67 but I still see these errors. 
Going back to earlier versions of SML/NJ becomes more difficult due 
to library incompatibilities during the installation of SML/NJ.

Roger

On Mon, 26 Oct 2009, Roger Price wrote:

> Is it possible to have ml-lex without ml-ulex?
> Is Ml-ulex supposed to be a drop-in replacement for Ml-lex?


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