'let' keyword optional in do notation
Would it be possible to make the 'let' keyword in a do block optional? So instead of
do ...
let x = exp1
y = exp2
z <- exp3
...
you could simply write
do ...
x = exp1
y = exp2
z <- exp3
...
Where each sequence of let-less bindings is put in a separate binding group. I'm no parsing wizard, but I couldn't come up with any situations in which this would cause ambiguity. To me, the let-less version is easier on the eyes, more consistent with <- bindings, and also makes it less of a hassle to move stuff around.
The above probably also holds for list/monad comprehensions, but the explicit let has never really bothered me there.
I've also posted the idea on Haskell cafe: http://www.mail-archive.com/haskell-cafe@haskell.org/msg100541.html
Trac metadata
Trac field | Value |
---|---|
Version | 7.6.1-rc1 |
Type | FeatureRequest |
TypeOfFailure | OtherFailure |
Priority | normal |
Resolution | Unresolved |
Component | Compiler |
Test case | |
Differential revisions | |
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Blocking | |
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