| definition: |
checkInfix :: Expression a -> CSM ()
checkInfix e =
case checkInfixCompare e of
(sI, _, "==", (List _ _ []))
-> report (Message
(getSpan sI)
(text "Do not use" <+> colorizeKey "a == []")
(text "Use" <+> colorizeKey "null a" <+> text "instead"))
(sI, (List _ _ []), "==", _)
-> report (Message
(getSpan sI)
(text "Do not use" <+> colorizeKey "[] == a")
(text "Use" <+> colorizeKey "null a" <+> text "instead"))
(sI, (List _ _ []), "/=", _)
-> report (Message
(getSpan sI)
(text "Do not use" <+> colorizeKey "[] /= a")
(text "Use" <+> colorizeKey "not (null a)" <+> text "instead"))
(sI, _, "/=", (List _ _ []))
-> report (Message
(getSpan sI)
(text "Do not use" <+> colorizeKey "a /= []")
(text "Use" <+> colorizeKey "not (null a)" <+> text "instead"))
_ -> return ()
|
| demand: |
argument 1 |
| deterministic: |
deterministic operation |
| documentation: |
-- Checks whether an infix comparison with the empty list (such as `x == []`) -- is used. If so, a warning is emitted (use 'null' instead). |
| failfree: |
<FAILING> |
| indeterministic: |
referentially transparent operation |
| infix: |
no fixity defined |
| iotype: |
{(_) |-> _}
|
| name: |
checkInfix |
| precedence: |
no precedence defined |
| result-values: |
_ |
| signature: |
Curry.Types.Expression a -> Control.Monad.Trans.State.StateT Types.CheckState Data.Functor.Identity.Identity () |
| solution-complete: |
operation might suspend on free variables |
| terminating: |
possibly non-terminating |
| totally-defined: |
possibly non-reducible on same data term |