By analogy to ML, which has "let" and "let rec", where the latter
corresponds to Haskell's "let", one is led to "let nonrec". I
would definitely not like "shadow", for it means that new
variable does NOT cast a shadow on its definining expression.
I fear also that "let nonrec" by any name would introduce another
attractive nuisance, just as insidious as the one it is intended
to correct. For example
x = ...
let nonrec { x = someFunction x
xsq = x^2} in ...
won't do what was probably intended. In my own code, this idiom
is more likely than the one that sparked the discussion.
Doug
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