[Haskell-cafe] Alex and Flex

Manlio Perillo manlio_perillo at libero.it
Thu Oct 2 17:23:05 EDT 2008


I'm starting to write a CSS parser with Alex and Happy.
The grammar is defined here:

However I have noted that there are some difference in the syntax 
between Alex and Flex?
What is the rationale?

One more thing.
Here: http://www.haskell.org/alex/doc/html/alex-files.html
it seems that there is an error with
macrodef  :=  @smac '=' set
            |  @rmac '=' regexp

it should be
macrodef  :=  $smac '=' set
            |  @rmac '=' regexp

Thanks   Manlio Perillo

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