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steve donovan wrote:
Some problems led themselves to declarative solutions, some don't,
it's good to be able to choose the mode of solution. (It is also
partly a 'cognitive style' thing.)
Yes, definitely!

It isn't at all too late in the development process. Here's a quote:

Why the tab in column 1? Yacc was new, Lex was brand new. I hadn't
tried either, so I figured this would be a good excuse to learn. After
getting myself snarled up with my first stab at Lex, I just did
something simple with the pattern newline-tab. It worked, it stayed.
And then a few weeks later I had a user population of about a dozen,
most of them friends, and I didn't want to screw up my embedded base.
The rest, sadly, is history.
     - Stu Feldman, author of make

It's amazing how many times the author of something doesn't foresee how far his/her creature will go! Sort of Dr.Frankenstein, but in a positive perspective :-))

-- Lorenzo